Abnormal sound optimization control method, device and equipment for automobile shock absorber and computer readable storage medium

Abstract

The invention discloses an automobile shock absorber abnormal sound optimization control method, device and equipment and a computer readable storage medium, and relates to the technical field of automobiles, and the method comprises the steps: collecting shock absorber abnormal sound test diagnosis signals, shock absorber bushing rigidity, shock absorber parameters and automobile body plate rigidity when a vehicle runs in a target abnormal sound generation road section; spectrum analysis is carried out to determine an abnormal sound source to obtain the abnormal sound state of the shock absorber; based on the shock absorber abnormal sound state, the shock absorber lining rigidity, the shock absorber parameters and the vehicle body plate rigidity, the shock absorber lining optimization rigidity, the shock absorber optimization parameters and the vehicle body plate optimization rigidity are determined; and controlling the vehicle to eliminate the abnormal sound of the shock absorber based on the shock absorber bushing rigidity, the shock absorber parameters, the vehicle body plate rigidity, the shock absorber bushing optimization rigidity, the shock absorber optimization parameters and the vehicle body plate optimization rigidity. The abnormal sound of the shock absorber is quickly diagnosed and optimized by analyzing the abnormal sound related parameters, the comfort is improved, and the cost is reduced.

Description

Technical Field

[0001] The present application relates to the field of automobile technology, and in particular to an optimization control method, device, equipment and computer-readable storage medium for abnormal noise of automobile shock absorbers. Background Art

[0002] With the rapid development of the automobile industry and the increasing demand of consumers for automobile comfort, the noise, vibration and roughness performance of automobiles has gradually become one of the important indicators for measuring automobile quality. Among them, the shock absorber often makes abnormal noises, that is, produces a thumping sound. When the car is driving on special roads such as cement grooved roads, joint roads, and bad roads, the shock absorber makes obvious thumping sounds and the sound quality is poor, which affects the sound quality of the car, not only affecting the driving experience, but also may pose a hidden danger to the safety of the car. Therefore, it is necessary to diagnose and optimize the abnormal noise of the shock absorber of the car.

[0003] At present, in order to solve the problem of abnormal noise of automobile shock absorbers, the existing practice is to use multi-stage variable damping and variable stiffness shock absorbers based on magnetorheological materials to achieve multi-stage and large-range adjustment of the shock absorber damping, and to make the stiffness of the shock absorber adaptively change, so as to achieve the vibration reduction effect of active and passive integrated control.

[0004] However, after using this method, the problem of abnormal noise from shock absorbers still occurs frequently, especially on special road surfaces such as cement grooved roads, joint roads, bad roads, etc. The shock absorber has obvious thumping sound and poor sound quality, which seriously affects the driving experience. Therefore, how to effectively diagnose and optimize the abnormal noise from shock absorbers has become a technical problem that needs to be solved urgently.

[0005] The above contents are only used to assist in understanding the technical solution of the present application and do not constitute an admission that the above contents are prior art. Summary of the invention

[0006] The main purpose of the present application is to provide a method, device, equipment and computer-readable storage medium for optimizing the abnormal noise control of automobile shock absorbers, aiming to solve the technical problem of how to effectively diagnose and optimize the abnormal noise of shock absorbers.

[0007] To achieve the above objectives, the present application proposes a method for optimizing the abnormal noise control of a vehicle shock absorber, the method comprising:

[0008] Collect the shock absorber abnormal noise test diagnostic signal, shock absorber bushing stiffness, shock absorber parameters and body panel stiffness of the vehicle driving on the target abnormal noise section, and perform spectrum analysis to determine the abnormal noise source and obtain the shock absorber abnormal noise status;

[0009] determining a shock absorber bushing optimized stiffness, a shock absorber optimized parameter, and a body panel optimized stiffness based on the shock absorber abnormal sound state, the shock absorber bushing stiffness, the shock absorber parameter, and the body panel stiffness;

[0010] A vehicle is controlled to eliminate shock absorber squeaks based on the shock absorber bushing stiffness, the shock absorber parameters, the body panel stiffness, the shock absorber bushing optimized stiffness, the shock absorber optimized parameters, and the body panel optimized stiffness.

[0011] In one embodiment, the step of collecting the shock absorber abnormal noise test diagnostic signal, shock absorber bushing stiffness, shock absorber parameters and body panel stiffness of the vehicle traveling in the target abnormal noise generating section includes:

[0012] Obtain shock absorber vibration signal, in-vehicle noise signal, shock absorber vibration acceleration, wheel cover vibration acceleration, flow valve throttling area, oil viscosity, oil storage chamber gas pressure, recovery valve initial preload, shock absorber control current, shock absorber abnormal sound peak frequency, body panel vibration acceleration;

[0013] determining a shock absorber abnormal noise test diagnostic signal based on the shock absorber vibration signal and the in-vehicle noise signal;

[0014] determining a shock absorber bushing stiffness based on the shock absorber vibration acceleration and the wheel house vibration acceleration;

[0015] Determining shock absorber parameters based on the throttling area of ​​the flow valve, the oil viscosity, the gas pressure of the oil storage chamber, the initial preload force of the restoring valve and the shock absorber control current;

[0016] A body panel stiffness is determined based on the shock absorber squeal peak frequency and the body panel vibration acceleration.

[0017] In one embodiment, the step of determining the optimized stiffness of the shock absorber bushing, the optimized parameters of the shock absorber and the optimized stiffness of the body panel based on the abnormal sound state of the shock absorber, the stiffness of the shock absorber bushing, the shock absorber parameters and the stiffness of the body panel comprises:

[0018] Based on the abnormal noise state of the shock absorber, the stiffness of the shock absorber upper bushing is controlled to adjust the stiffness of the shock absorber bushing, and the abnormal noise state of the shock absorber upper bushing stiffness control and the optimized stiffness of the shock absorber bushing are determined;

[0019] Based on the abnormal noise state of the bushing stiffness control on the shock absorber, the shock absorber vibration control is performed to adjust the shock absorber parameters, and the abnormal noise state of the shock absorber vibration control and the shock absorber optimization parameters are determined;

[0020] The body panel vibration control is performed based on the abnormal noise state of the shock absorber vibration control to adjust the body panel stiffness and determine the optimized stiffness of the body panel.

[0021] In one embodiment, the steps of controlling the stiffness of the upper bushing of the shock absorber based on the abnormal noise state of the shock absorber to adjust the stiffness of the shock absorber bushing, and determining the abnormal noise state of the upper bushing stiffness control of the shock absorber and the optimized stiffness of the shock absorber bushing include:

[0022] When the abnormal noise state of the shock absorber is that the shock absorber generates abnormal noise, the vibration isolation rate of the upper bushing of the shock absorber is calculated based on the vibration acceleration of the shock absorber and the vibration acceleration of the wheel cover in the stiffness of the shock absorber bushing;

[0023] Obtaining a target vibration isolation rate of an upper bushing of a shock absorber, judging a vibration isolation performance state based on the vibration isolation rate of the upper bushing of the shock absorber and the target vibration isolation rate of the upper bushing of the shock absorber, and adjusting the stiffness of the shock absorber bushing to determine an optimized stiffness of the shock absorber bushing;

[0024] A target allowable stiffness value is obtained, and a stiffness control abnormal noise state of the shock absorber upper bushing is determined based on the shock absorber bushing optimization stiffness and the target allowable stiffness value.

[0025] In one embodiment, the step of adjusting the shock absorber parameters by performing shock absorber vibration control based on the abnormal sound state of the shock absorber upper bushing stiffness control, and determining the shock absorber vibration control abnormal sound state and the shock absorber optimization parameters comprises:

[0026] When the abnormal noise state of the bushing stiffness control on the shock absorber is that the abnormal noise still exists, obtaining a vibration target value of the shock absorber body;

[0027] The vibration state is judged based on the vibration acceleration of the shock absorber in the shock absorber bushing stiffness and the vibration target value of the shock absorber body, the shock absorber parameters are adjusted to determine the shock absorber optimization parameters, and the abnormal sound state of the shock absorber vibration control is determined.

[0028] In one embodiment, the step of adjusting the stiffness of the body panel by performing body panel vibration control based on the abnormal noise state of the shock absorber vibration control and determining the optimized stiffness of the body panel comprises:

[0029] When the abnormal noise state of the shock absorber vibration control is that the abnormal noise still exists, a working deformation analysis is performed based on the peak frequency of the shock absorber abnormal noise in the body panel stiffness and the vibration acceleration of the body panel, the vibration position panel is obtained, and the vibration position panel is optimized to determine the optimized stiffness of the body panel.

[0030] In one embodiment, the step of controlling the vehicle to eliminate abnormal noise of the shock absorber based on the shock absorber bushing stiffness, the shock absorber parameters, the body panel stiffness, the shock absorber bushing optimized stiffness, the shock absorber optimized parameters and the body panel optimized stiffness comprises:

[0031] When the abnormal noise state of the shock absorber is that the shock absorber does not generate abnormal noise, controlling the vehicle to eliminate the abnormal noise of the shock absorber based on the stiffness of the shock absorber bushing, the shock absorber parameter and the stiffness of the vehicle body panel;

[0032] When the abnormal noise state of the bushing stiffness control on the shock absorber is that there is no abnormal noise, controlling the vehicle to eliminate the abnormal noise of the shock absorber based on the optimized stiffness of the shock absorber bushing, the shock absorber parameters and the stiffness of the vehicle body panel;

[0033] When the abnormal noise state of the shock absorber vibration control is that there is no abnormal noise, controlling the vehicle to eliminate the abnormal noise of the shock absorber based on the optimized stiffness of the shock absorber bushing, the optimized parameters of the shock absorber and the stiffness of the vehicle body panel;

[0034] When the shock absorber abnormal noise state is that the shock absorber produces abnormal noise and the shock absorber upper bushing stiffness control abnormal noise state is that the abnormal noise still exists and the shock absorber vibration control abnormal noise state is that the abnormal noise still exists, the vehicle is controlled to eliminate the shock absorber abnormal noise based on the shock absorber bushing optimized stiffness, the shock absorber optimization parameters and the body panel optimized stiffness.

[0035] In addition, to achieve the above-mentioned purpose, the present application also proposes a vehicle shock absorber abnormal noise optimization control device, the vehicle shock absorber abnormal noise optimization control device comprising:

[0036] An acquisition module is used to collect the shock absorber abnormal noise test diagnosis signal, shock absorber bushing stiffness, shock absorber parameters and body panel stiffness of the vehicle when the vehicle is driving on the target abnormal noise section, and perform spectrum analysis to determine the abnormal noise source and obtain the shock absorber abnormal noise state;

[0037] a processing module, configured to determine a shock absorber bushing optimized stiffness, a shock absorber optimized parameter, and a body panel optimized stiffness based on the shock absorber abnormal sound state, the shock absorber bushing stiffness, the shock absorber parameter, and the body panel stiffness;

[0038] An execution module is configured to control a vehicle to eliminate abnormal sound of a shock absorber based on the shock absorber bushing stiffness, the shock absorber parameter, the body panel stiffness, the shock absorber bushing optimized stiffness, the shock absorber optimized parameter and the body panel optimized stiffness.

[0039] In addition, to achieve the above-mentioned purpose, the present application also proposes a vehicle shock absorber abnormal noise optimization control device, the device comprising: a memory, a processor and a computer program stored in the memory and executable on the processor, the computer program being configured to implement the steps of the vehicle shock absorber abnormal noise optimization control method as described above.

[0040] In addition, to achieve the above-mentioned purpose, the present application also proposes a storage medium, which is a computer-readable storage medium, and a computer program is stored on the storage medium. When the computer program is executed by the processor, the steps of the automobile shock absorber abnormal noise optimization control method as described above are implemented.

[0041] One or more technical solutions proposed in this application have at least the following technical effects:

[0042] The present application proposes a method for optimizing and controlling abnormal noise of automobile shock absorbers, which collects shock absorber abnormal noise test diagnostic signals, shock absorber bushing stiffness, shock absorber parameters and body panel stiffness of a vehicle traveling on a target abnormal noise occurrence section, and performs spectrum analysis to determine the abnormal noise source to obtain the abnormal noise state of the shock absorber; based on the abnormal noise state of the shock absorber, the shock absorber bushing stiffness, the shock absorber parameters and the body panel stiffness, the shock absorber bushing optimized stiffness, the shock absorber optimized parameters and the body panel optimized stiffness are determined; based on the shock absorber bushing stiffness, the shock absorber parameters, the body panel stiffness, the shock absorber bushing optimized stiffness, the shock absorber optimized parameters and the body panel optimized stiffness, the vehicle is controlled to eliminate the abnormal noise of the shock absorber. The present application collects and analyzes the abnormal noise signals of the shock absorbers, bushing stiffness, shock absorber parameters and body panel stiffness of the vehicle during driving, quickly and accurately identifies and diagnoses the source of abnormal noise of the automobile shock absorbers, and determines the abnormal noise state in combination with spectrum analysis, optimizes the shock absorber bushing stiffness, shock absorber parameters and body panel stiffness, thereby effectively controlling and eliminating the abnormal noise of the shock absorbers, improving driving comfort, shortening the development cycle, reducing development costs, and improving the market competitiveness of automobile products. At the same time, it can be widely used in various models and has extremely strong versatility and promotion value. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0044] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0045] Figure 1 This is a flow chart of the first embodiment of the abnormal noise optimization control method of the automobile shock absorber of the present application;

[0046] Figure 2 This is the spectrum diagram of the in-vehicle noise and shock absorber vibration of the automobile shock absorber abnormal noise optimization control method of this application;

[0047] Figure 3 A flow chart of the second embodiment of the abnormal noise optimization control method for automobile shock absorbers of the present application;

[0048] Figure 4 This is a schematic diagram of the effect of the shock absorber bushing stiffness on the abnormal noise in the vehicle in the present application of the automobile shock absorber abnormal noise optimization control method;

[0049] Figure 5This is a schematic diagram of the vibration comparison of the shock absorber before and after the shock absorber parameters are adjusted in the abnormal noise optimization control method of the automobile shock absorber of this application;

[0050] Figure 6 This is a schematic diagram of the effect of shock absorber parameters on the noise inside the vehicle in the method for optimizing the control of abnormal noise of automobile shock absorbers in this application;

[0051] Figure 7 This is a schematic diagram of the working deformation of the body panel of the automobile shock absorber abnormal noise optimization control method of this application;

[0052] Figure 8 This is a schematic diagram of the improvement effect of wheel cover reinforcement on abnormal noise in the vehicle shock absorber of this application;

[0053] Fig. 9 This is a schematic diagram of the module structure of the abnormal noise optimization control device for automobile shock absorbers according to an embodiment of the present application;

[0054] Fig.10 It is a schematic diagram of the equipment structure of the hardware operating environment involved in the abnormal noise optimization control method of the automobile shock absorber in the embodiment of the present application.

[0055] The purpose, features and advantages of this application will be further described in conjunction with the embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0056] It should be understood that the specific embodiments described herein are only used to explain the technical solutions of the present application and are not used to limit the present application.

[0057] In order to better understand the technical solution of the present application, a detailed description will be given below in conjunction with the accompanying drawings and specific implementation methods.

[0058] The main solution of the embodiment of the present application is: collecting shock absorber abnormal noise test diagnostic signals, shock absorber bushing stiffness, shock absorber parameters and body panel stiffness of the vehicle traveling on the target abnormal noise occurrence section, and performing spectrum analysis to determine the abnormal noise source to obtain the shock absorber abnormal noise state; based on the shock absorber abnormal noise state, the shock absorber bushing stiffness, the shock absorber parameters and the body panel stiffness, determine the shock absorber bushing optimized stiffness, the shock absorber optimized parameters and the body panel optimized stiffness; based on the shock absorber bushing stiffness, the shock absorber parameters, the body panel stiffness, the shock absorber bushing optimized stiffness, the shock absorber optimized parameters and the body panel optimized stiffness, control the vehicle to eliminate the shock absorber abnormal noise.

[0059] In this embodiment, for the convenience of description, the following description is made by taking the abnormal noise optimization control device for identifying the automobile shock absorber as the execution subject.

[0060] Because the abnormal noise problem of shock absorbers in the existing technology still occurs frequently, especially in special road conditions such as cement grooved roads, joint roads, bad roads, etc., the shock absorber has an obvious thumping sound and poor sound quality, which seriously affects the driving experience.

[0061] The present application provides a solution, which collects shock absorber abnormal noise test diagnostic signals, shock absorber bushing stiffness, shock absorber parameters and body panel stiffness of a vehicle traveling on a target abnormal noise occurrence section, and performs spectrum analysis to determine the abnormal noise source to obtain the shock absorber abnormal noise state; based on the shock absorber abnormal noise state, the shock absorber bushing stiffness, the shock absorber parameters and the body panel stiffness, the shock absorber optimized stiffness, the shock absorber optimized parameters and the body panel optimized stiffness are determined; based on the shock absorber bushing stiffness, the shock absorber parameters, the body panel stiffness, the shock absorber bushing optimized stiffness, the shock absorber optimized parameters and the body panel optimized stiffness, the vehicle is controlled to eliminate the shock absorber abnormal noise.

[0062] It can be seen from the above embodiments that the present application collects and analyzes the abnormal noise signal of the shock absorber, bushing stiffness, shock absorber parameters and body panel stiffness of the vehicle during driving, quickly and accurately identifies and diagnoses the source of abnormal noise of the automobile shock absorber, and determines the abnormal noise state in combination with spectrum analysis, optimizes the shock absorber bushing stiffness, shock absorber parameters and body panel stiffness, thereby effectively controlling and eliminating the abnormal noise of the shock absorber, improving driving comfort, shortening the development cycle, reducing development costs, and improving the market competitiveness of automobile products. At the same time, it can be widely used in various models and has extremely strong versatility and promotion value.

[0063] Based on this, the embodiment of the present application provides a method for optimizing the abnormal noise control of a vehicle shock absorber, referring to Figure 1 , Figure 1 This is a flow chart of the first embodiment of the abnormal noise optimization control method of the automobile shock absorber of the present application.

[0064] In this embodiment, there is a preferred implementation mode, in which a three-axis acceleration sensor is arranged on the automobile shock absorber, and the three-axis acceleration sensor is arranged at the upper end position of the shock absorber piston rod and the position on the wheel cover sheet metal corresponding to the shock absorber mounting seat, so as to accurately collect the vibration signals of the shock absorber and the wheel cover. By installing the three-axis acceleration sensor at the key position of the shock absorber, the vibration conditions of the shock absorber in different directions can be captured more accurately, so as to diagnose the source and characteristics of the abnormal noise of the shock absorber according to the specific vibration frequency and amplitude, and more effectively reduce or eliminate the abnormal noise of the shock absorber.

[0065] In this embodiment, there is also a preferred implementation manner, in which a microphone is further arranged on the automobile shock absorber, and the microphone is arranged at the outer ear position of the occupant where the abnormal noise in the car is obvious, wherein the abnormal noise microphone of the rear shock absorber is arranged at the right ear position of the right rear occupant, for collecting the noise signal in the car. By arranging the microphone at the outer ear position of the occupant in the car, the noise signal in the car can be captured more accurately, especially in the area where the abnormal noise is obvious, thereby improving the collection quality of the noise signal and more accurately judging the source of the abnormal noise.

[0066] The vibration acceleration sensor and the microphone are connected to a vibration and noise data acquisition front end through cables, and the vibration and noise data acquisition front end is connected to a computer to form a vibration test system, so that vibration signals and noise signals when abnormal noise occurs in the vehicle can be collected.

[0067] In this embodiment, the automobile shock absorber abnormal noise optimization control method includes steps S10 to S30:

[0068] Step S10, collecting the shock absorber abnormal noise test diagnosis signal, shock absorber bushing stiffness, shock absorber parameters and body panel stiffness of the vehicle traveling in the target abnormal noise generating section, and performing spectrum analysis to determine the abnormal noise source and obtain the shock absorber abnormal noise state;

[0069] It should be noted that the target abnormal noise occurrence section reflects the characteristics of the tendency of the shock absorber to produce abnormal noise when the car is driving under specific road conditions, including cement grooved roads, joint roads and bad roads and special road surfaces; the shock absorber abnormal noise test diagnostic signal reflects the characteristics of the vibration and sound signals generated by the shock absorber in actual operation; the shock absorber bushing stiffness reflects the characteristics of the ability of the shock absorber bushing material to resist deformation; the shock absorber parameters reflect the characteristics of the working state inside the shock absorber; the body panel stiffness reflects the characteristics of the body structure's resistance to vibration; and the shock absorber abnormal noise state reflects the characteristics of the actual state of the shock absorber under specific test conditions.

[0070] It is understandable that the target abnormal noise occurrence section is prone to cause abnormal noise from the vehicle shock absorber due to its unevenness or special structure, affecting the driving experience and car sound quality. GPS data can be used to track the vehicle's driving path, mark the specific location where the abnormal noise occurs, and set a section identification device in the car to identify the target abnormal noise occurrence section in advance. More accurate vibration and noise data that triggers the abnormal noise during driving can be collected in the target abnormal noise occurrence section, and then through spectrum analysis and sound recognition technology, the in-car noise and shock absorber vibration signal can be compared, so that the source and frequency range of the abnormal noise can be accurately diagnosed, and the specific section characteristics where the abnormal noise occurs can be recorded to quickly and accurately locate the source of the abnormal noise.

[0071] In addition, it should be noted that the shock absorber vibration and the in-vehicle noise are tested on the target abnormal noise occurrence section, and the shock absorber vibration signal and the in-vehicle noise signal are subjected to spectrum analysis, and the in-vehicle noise and the shock absorber vibration are replayed. If the time when the in-vehicle abnormal noise occurs corresponds to the time when the shock absorber vibrates, it is determined that the abnormal noise is generated by the shock absorber, and the abnormal noise is filtered and replayed, and the abnormal noise frequency range is obtained by analysis, such as Figure 2 As shown, Figure 2 This is the in-vehicle noise and shock absorber vibration spectrum diagram of the automobile shock absorber abnormal noise optimization control method of this application. The vehicle is driving on the target abnormal noise section, and there is an abnormal noise in the car, that is, there is a thumping sound. The shock absorber vibration signal and the in-vehicle noise signal are spectrally analyzed to obtain the in-vehicle noise and shock absorber vibration spectrum. Figure 2 It can be seen from the figure that the time when the dongdong sound occurs corresponds to the vibration time of the shock absorber. Therefore, it is judged that the excitation source of the abnormal sound is the shock absorber. After filtering and playback, it is determined that the frequency range of the dongdong sound is 200Hz-450Hz.

[0072] For ease of understanding, the example of obtaining the abnormal noise state of the shock absorber is used for explanation, wherein the information collection device is an information collection module, and the storage device is a memory.

[0073] When the vehicle is traveling on a target abnormal noise occurrence section, such as a cement grooved road, a joint road, and a bad road, the information collection device collects the shock absorber vibration signal and the in-vehicle noise signal during the vehicle driving process, performs spectrum analysis based on the shock absorber vibration signal and the in-vehicle noise signal, and replays the shock absorber vibration and the in-vehicle noise. If the time when the in-vehicle abnormal noise occurs corresponds to the time when the shock absorber vibrates, it is determined that the abnormal noise is generated by the shock absorber, and the abnormal noise is filtered and replayed, and the frequency range of the abnormal noise is obtained by analysis, so as to determine the source of the abnormal noise and obtain the abnormal noise state of the shock absorber. If the abnormal noise state of the shock absorber is that the shock absorber generates abnormal noise or the shock absorber does not generate abnormal noise, subsequent processing is performed based on the abnormal noise state of the shock absorber.

[0074] In a feasible implementation, step S10 may include steps A11 to A15:

[0075] Step A11, obtaining a shock absorber vibration signal, an in-vehicle noise signal, a shock absorber vibration acceleration, a wheel cover vibration acceleration, a flow valve throttling area, oil viscosity, a gas pressure in the oil storage chamber, an initial preload force of a restoring valve, a shock absorber control current, a shock absorber abnormal sound peak frequency, and a body panel vibration acceleration;

[0076] It should be noted that the shock absorber vibration signal reflects the characteristics of the vibration state of the shock absorber in actual operation, including the frequency, amplitude and waveform of the vibration, which is used to identify the source of the abnormal sound. The in-vehicle noise signal reflects the characteristics of the quality of the in-vehicle sound environment, which is used to evaluate the impact of the abnormal sound on driving. The shock absorber vibration acceleration reflects the characteristics of the intensity and change rate of the shock absorber vibration, which is used to evaluate the performance of the shock absorber. The wheel cover vibration acceleration reflects the characteristics of the vibration intensity of the wheel cover during driving, which is used to evaluate the vibration isolation effect. The throttling area of ​​the flow valve reflects the oil flow inside the shock absorber. The characteristics of the dynamic resistance are used to adjust the damping characteristics and vibration control effect of the shock absorber, the oil viscosity reflects the characteristics of the flow performance of the oil inside the shock absorber, the gas pressure in the oil storage chamber reflects the characteristics of the pressure state of the oil inside the shock absorber, the initial preload of the restoring valve reflects the characteristics of the initial resistance during the recovery process of the shock absorber, the shock absorber control current reflects the characteristics of the damping adjustment state of the adjustable shock absorber, the shock absorber abnormal sound peak frequency reflects the characteristics of the main frequency components of the abnormal sound, and the body panel vibration acceleration reflects the characteristics of the vibration state of the body panel during driving.

[0077] Step A12, determining a shock absorber abnormal noise test diagnostic signal based on the shock absorber vibration signal and the in-vehicle noise signal;

[0078] It can be understood that the shock absorber abnormal noise test diagnostic signal can characterize whether the shock absorber generates abnormal noise, that is, whether there is abnormal sound, and reveal the sound characteristics of the abnormal noise, including the sound quality, loudness and frequency content of the sound, such as metal knocking sound and component friction sound, and obtain the severity of the abnormal noise, such as the intensity or loudness level of the sound, so as to locate the source of the abnormal noise, that is, determine the body parts that generate the abnormal noise, quickly and accurately identify and locate the source of the abnormal noise, and improve the efficiency and accuracy of abnormal noise diagnosis.

[0079] Step A13, determining the stiffness of the shock absorber bushing based on the shock absorber vibration acceleration and the wheel cover vibration acceleration;

[0080] It is understandable that the stiffness of the shock absorber bushing directly affects the vibration isolation effect of the shock absorber. When the stiffness of the shock absorber bushing is lower, it can more effectively isolate the high-frequency vibration from the wheel and reduce the impact of the vibration on the vehicle body, thereby improving ride comfort. However, if the stiffness of the shock absorber bushing is not appropriate, it will also cause abnormal vibration in the contact between the shock absorber and the vehicle body, thereby producing abnormal noise.

[0081] Step A14, determining shock absorber parameters based on the throttling area of ​​the flow valve, the oil viscosity, the gas pressure of the oil storage chamber, the initial preload force of the restoring valve and the shock absorber control current;

[0082] It can be understood that the shock absorber parameters affect the response speed and range of the shock absorber to dynamic loads, including the frequency response and damping ratio of the shock absorber, and determine the damping characteristics of the shock absorber. The shock absorber damping characteristics directly affect the vehicle's response to road unevenness and the shock absorber's ability to absorb vibration energy. For adjustable shock absorbers, the damping force of the shock absorber can be changed by adjusting the shock absorber control current to adapt to different driving conditions, effectively control and eliminate abnormal noise from the shock absorber, and improve driving comfort.

[0083] Step A15: determining the body panel stiffness based on the shock absorber abnormal noise peak frequency and the body panel vibration acceleration.

[0084] It is understandable that body panels need to withstand long-term dynamic loads without fatigue failure, and appropriate panel stiffness can reduce the transmission of vibration, thereby reducing the vibration and noise levels in the car.

[0085] Step S20, determining the optimized stiffness of the shock absorber bushing, the optimized parameters of the shock absorber and the optimized stiffness of the body panel based on the abnormal sound state of the shock absorber, the stiffness of the shock absorber bushing, the shock absorber parameters and the stiffness of the body panel;

[0086] It should be noted that the optimized stiffness of the shock absorber bushing reflects the characteristics of the adjusted shock absorber bushing stiffness, the optimized shock absorber parameters reflect the characteristics of the parameter settings after the shock absorber parameters are adjusted, and the optimized stiffness of the body panel reflects the characteristics of the panel stiffness after the body structure is improved.

[0087] It can be understood that the optimized stiffness of the shock absorber bushing can be obtained by adjusting the material properties or geometric structure of the bushing to eliminate abnormal noise. The shock absorber parameters inside the shock absorber can be adjusted to obtain the optimized shock absorber parameters, improve the response state of the shock absorber, reduce the vibration and noise generated, and ensure driving stability and comfort. The strength of the body panels can be strengthened, new materials can be used, or the panel design can be adjusted to adjust the stiffness of the body panels to obtain the optimized stiffness of the body panels. Without sacrificing durability and reliability, the vibration and noise caused by the body panels can be reduced, especially the vibration within the frequency range of the abnormal sound of the shock absorber, so as to more effectively control the propagation of vibration, reduce the noise inside the vehicle, and improve ride comfort.

[0088] For ease of understanding, the determination of the optimized stiffness of the shock absorber bushing, the optimized parameters of the shock absorber and the optimized stiffness of the body panel is taken as an example for explanation, wherein the information collection device is the information collection module, the storage device is the memory, and the processing device is the processing module.

[0089] When the vehicle is traveling on the target abnormal noise generating section, the information acquisition device collects the shock absorber vibration signal, the in-vehicle noise signal, the shock absorber vibration acceleration, the wheel cover vibration acceleration, the flow valve throttling area, the oil viscosity, the oil storage chamber gas pressure, the initial preload force of the recovery valve, the shock absorber control current, the shock absorber abnormal noise peak frequency and the body panel vibration acceleration during the vehicle driving process and stores them in the memory, and performs spectrum analysis based on the shock absorber vibration signal and the in-vehicle noise signal to determine the abnormal noise source and obtain the abnormal noise state of the shock absorber, and determines the shock absorber bushing based on the shock absorber vibration acceleration and the wheel cover vibration acceleration. Stiffness, determine shock absorber parameters based on the throttling area of ​​the flow valve, the oil viscosity, the gas pressure of the oil storage chamber, the initial preload of the restoring valve and the shock absorber control current, determine the body panel stiffness based on the shock absorber abnormal sound peak frequency and the body panel vibration acceleration, determine the shock absorber bushing optimized stiffness, shock absorber optimized parameters and body panel optimized stiffness based on the shock absorber abnormal sound state, the shock absorber bushing stiffness, the shock absorber parameters and the body panel stiffness, and perform subsequent processing based on the shock absorber bushing optimized stiffness, shock absorber optimized parameters and body panel optimized stiffness.

[0090] Step S30 , controlling the vehicle to eliminate abnormal noise of the shock absorber based on the shock absorber bushing stiffness, the shock absorber parameters, the body panel stiffness, the shock absorber bushing optimized stiffness, the shock absorber optimized parameters and the body panel optimized stiffness.

[0091] It can be understood that the stiffness of the shock absorber bushing, the vibration of the shock absorber and the vibration of the body panel are controlled in response to the abnormal noise generated by the shock absorber, so as to optimize the corresponding parameters in a targeted manner, thereby eliminating or reducing the abnormal noise in the car, providing better vibration control and improving driving comfort.

[0092] For ease of understanding, the example of obtaining shock absorber bushing stiffness, shock absorber parameters, body panel stiffness, shock absorber bushing optimized stiffness, shock absorber optimized parameters and body panel optimized stiffness is used for explanation, wherein the information collection device is an information collection module, the storage device is a memory, and the execution device is an execution module.

[0093] When the vehicle is traveling on a target abnormal noise occurrence section, the information collection device collects the shock absorber bushing stiffness, shock absorber parameters and body panel stiffness and stores them in a memory, performs abnormal noise optimization control to optimize the shock absorber bushing stiffness, the shock absorber parameters and the body panel stiffness to determine the shock absorber bushing optimization stiffness, the shock absorber optimization parameters and the body panel optimization stiffness; when the shock absorber abnormal noise state is that the shock absorber does not produce abnormal noise, the vehicle is controlled to eliminate the shock absorber abnormal noise based on the shock absorber bushing stiffness, the shock absorber parameters and the body panel stiffness; when the shock absorber upper bushing stiffness control abnormal noise state is that there is no abnormal noise, based on the shock absorber The optimized stiffness of the bushing, the shock absorber parameters and the body panel stiffness control the vehicle to eliminate abnormal noise from the shock absorber; when the abnormal noise state of the shock absorber vibration control is that there is no abnormal noise, the vehicle is controlled to eliminate abnormal noise from the shock absorber based on the optimized stiffness of the shock absorber bushing, the optimized parameters of the shock absorber and the body panel stiffness; when the abnormal noise state of the shock absorber is that the shock absorber produces abnormal noise and the abnormal noise state of the bushing stiffness on the shock absorber is that there is still abnormal noise and the abnormal noise state of the shock absorber vibration control is that there is still abnormal noise, the vehicle is controlled to eliminate abnormal noise from the shock absorber based on the optimized stiffness of the shock absorber bushing, the optimized parameters of the shock absorber and the optimized stiffness of the body panel.

[0094] In a feasible implementation, step S30 may include steps B11 to B14:

[0095] Step B11, when the abnormal noise state of the shock absorber is that the shock absorber does not generate abnormal noise, controlling the vehicle to eliminate the abnormal noise of the shock absorber based on the stiffness of the shock absorber bushing, the shock absorber parameters and the stiffness of the vehicle body panel;

[0096] It is understandable that when the shock absorber has not yet produced abnormal noise, controlling the vehicle based on the shock absorber bushing stiffness, shock absorber parameters and body panel stiffness can effectively prevent the occurrence of abnormal noise, reduce maintenance costs and vehicle failure rate caused by abnormal noise, improve vehicle ride comfort, and reduce passenger discomfort caused by abnormal noise.

[0097] Step B12, when the abnormal noise state of the bushing stiffness control of the shock absorber is that there is no abnormal noise, controlling the vehicle to eliminate the abnormal noise of the shock absorber based on the optimized stiffness of the shock absorber bushing, the shock absorber parameters and the stiffness of the vehicle body panel;

[0098] It is understandable that after effectively controlling abnormal noise by adjusting the shock absorber bushing stiffness, the optimized shock absorber bushing stiffness can be used to improve the vehicle's NVH performance, further optimize the performance of the shock absorbers and body panels, achieve better NVH performance, reduce the possibility of abnormal noise recurrence, and provide a more stable driving experience.

[0099] Step B13, when the abnormal noise state of the shock absorber vibration control is that there is no abnormal noise, controlling the vehicle to eliminate the abnormal noise of the shock absorber based on the optimized stiffness of the shock absorber bushing, the shock absorber optimization parameters and the stiffness of the vehicle body panel;

[0100] It is understandable that after effectively controlling abnormal noise by adjusting the shock absorber optimization parameters, the shock absorber optimization parameters can be used to further fine-tune and control the vehicle's NVH performance, achieve fine management of the vibration and noise of the entire vehicle, and more effectively manage and reduce the vibration and noise of the vehicle under various road conditions.

[0101] Step B14, when the shock absorber abnormal noise state is that the shock absorber produces abnormal noise and the shock absorber upper bushing stiffness control abnormal noise state is that the abnormal noise still exists and the shock absorber vibration control abnormal noise state is that the abnormal noise still exists, control the vehicle to eliminate the shock absorber abnormal noise based on the shock absorber bushing optimized stiffness, the shock absorber optimized parameters and the body panel optimized stiffness.

[0102] It is understandable that after effectively controlling abnormal noise by adjusting the stiffness of body panels, the body panels can be used to optimize stiffness to further reduce noise and vibration inside the vehicle, significantly improving driving and riding comfort, ensuring that abnormal noise can be effectively eliminated even in complex situations, improving the reliability of the vehicle under various driving conditions, and reducing driving interruptions and vehicle failures caused by abnormal noise problems.

[0103] The automobile shock absorber abnormal noise optimization control method proposed in this embodiment collects shock absorber abnormal noise test diagnosis signals, shock absorber bushing stiffness, shock absorber parameters and body panel stiffness of the vehicle traveling on the target abnormal noise occurrence section, and performs spectrum analysis to determine the abnormal noise source to obtain the shock absorber abnormal noise state; based on the shock absorber abnormal noise state, the shock absorber bushing stiffness, the shock absorber parameters and the body panel stiffness, the shock absorber bushing optimization stiffness, the shock absorber optimization parameters and the body panel optimization stiffness are determined; based on the shock absorber bushing stiffness, the shock absorber parameters, the body panel stiffness, the shock absorber bushing optimization stiffness, the shock absorber optimization parameters and the body panel optimization stiffness, the vehicle is controlled to eliminate the shock absorber abnormal noise. The invention solves the technical problem of how to efficiently eliminate abnormal noise generated when driving on a specific road surface. Compared with the prior art, the invention collects the shock absorber abnormal noise test diagnosis signal, bushing stiffness, shock absorber parameters and body panel stiffness data under specific driving conditions, and uses spectrum analysis to accurately obtain the abnormal noise source, so as to optimize the abnormal noise control and adjust the shock absorber bushing stiffness, shock absorber parameters and body panel stiffness, eliminate the shock absorber abnormal noise, improve driving comfort, and improve the efficiency and accuracy of abnormal noise diagnosis, shorten the automobile development cycle, reduce costs, and has wide applicability and promotion value.

[0104] Based on the first embodiment of the present application, in the second embodiment of the present application, the same or similar contents as those in the above-mentioned embodiment 1 can be referred to the above introduction and will not be repeated later.

[0105] In this embodiment, refer to Figure 3 , Figure 3 This is a flow chart of the second embodiment of the automobile shock absorber abnormal noise optimization control method provided in the present application, wherein step S20 specifically includes steps S21 to S23:

[0106] Step S21, performing shock absorber upper bushing stiffness control to adjust the shock absorber bushing stiffness based on the shock absorber abnormal noise state, and determining the shock absorber upper bushing stiffness control abnormal noise state and the shock absorber bushing optimized stiffness;

[0107] It is understandable that the vibration isolation performance of the upper bushing of the shock absorber can be improved by gradually reducing the stiffness of the upper bushing of the shock absorber until the abnormal noise of the shock absorber disappears or the stiffness of the upper bushing reaches the minimum allowable stiffness value, and the minimum allowable stiffness value is the minimum stiffness value that meets the durability performance. The lower the stiffness of the upper bushing of the shock absorber, the higher its vibration isolation rate. The vibration of the shock absorber is transmitted to the vehicle body through the upper bushing of the shock absorber. The higher the vibration isolation rate of the upper bushing of the shock absorber, the smaller the shock absorber noise. Therefore, if the vibration isolation rate of the upper bushing of the shock absorber is lower than the target value, it is necessary to improve the vibration isolation rate of the upper bushing of the shock absorber by reducing the stiffness of the upper bushing of the shock absorber to eliminate the abnormal noise of the shock absorber. However, if the stiffness of the upper bushing of the shock absorber is reduced to the minimum allowable stiffness value and the abnormal noise of the shock absorber still exists, the shock absorber vibration control is performed.

[0108] In addition, it should be noted that if Figure 4 As shown, Figure 4 This is a schematic diagram of the effect of the shock absorber bushing stiffness on the abnormal noise inside the vehicle in the present application of the automobile shock absorber abnormal noise optimization control method, wherein the horizontal axis is the frequency and the vertical axis is the sound pressure level. After the bushing stiffness of the shock absorber is reduced, the thumping sound is reduced by 1.8dB(A) from 50.5dB(A) to 48.7dB(A), thereby achieving an improved effect.

[0109] For ease of understanding, the determination of the stiffness of the shock absorber upper bushing to control the abnormal noise state and the optimized stiffness of the shock absorber bushing is taken as an example for explanation, wherein the information collection device is the information collection module, the storage device is the memory, and the processing device is the processing module.

[0110] The information acquisition module obtains the abnormal noise state of the shock absorber and the stiffness of the shock absorber bushing and stores them in the memory. When the abnormal noise state of the shock absorber is that the shock absorber produces abnormal noise, the vibration isolation rate of the shock absorber upper bushing is calculated based on the shock absorber vibration acceleration and wheel cover vibration acceleration in the shock absorber bushing stiffness.

[0111] The calculation formula of the vibration isolation rate of the upper bushing of the shock absorber is:

[0112] T=20lg(aa / ap)

[0113] Wherein, T is the vibration isolation rate of the bushing on the shock absorber, aa is the vibration acceleration of the shock absorber, and ap is the vibration acceleration of the wheel cover.

[0114] The vibration isolation performance state is judged based on the vibration isolation rate of the shock absorber upper bushing and the target vibration isolation rate of the shock absorber upper bushing, the shock absorber bushing stiffness is adjusted to determine the optimized stiffness of the shock absorber bushing, and the target allowable stiffness value is obtained. The target allowable stiffness value is the necessary target value of the vibration isolation rate of the shock absorber upper bushing, and the state of abnormal noise control of the shock absorber upper bushing stiffness is determined based on the optimized stiffness of the shock absorber bushing and the target allowable stiffness value. If the abnormal noise state of the shock absorber upper bushing stiffness control is that the abnormal noise still exists or does not exist, subsequent processing is performed based on the optimized stiffness of the shock absorber bushing and the abnormal noise state of the shock absorber upper bushing stiffness control.

[0115] In a feasible implementation, step S21 may include steps C11 to C13:

[0116] Step C11, when the shock absorber abnormal noise state is that the shock absorber generates abnormal noise, calculating the vibration isolation rate of the shock absorber upper bushing based on the shock absorber vibration acceleration and the wheel cover vibration acceleration in the shock absorber bushing stiffness;

[0117] It should be noted that the vibration isolation rate of the shock absorber upper bushing reflects the performance characteristics of the shock absorber upper bushing in isolating the vibration energy transmitted from the wheel to the vehicle body, that is, the ability to reduce or prevent the vibration energy from being transmitted from the shock absorber to the vehicle body structure.

[0118] It can be understood that the vibration isolation rate of the bushing on the shock absorber determines the effect of the shock absorber in absorbing road impact and isolating vibration, which in turn affects the NVH performance of the entire vehicle. The higher the vibration isolation rate of the bushing on the shock absorber, the better the vibration isolation effect of the bushing on the shock absorber, which can more effectively reduce the impact of vibration on the vehicle body, thereby significantly reducing the vibration and noise levels in the vehicle, thereby improving ride comfort, and can reduce the abnormal sound of the vehicle body caused by vibration when driving on harsh road conditions, reduce the stress on the vehicle body structure and related components, and thus extend the service life.

[0119] Step C12, obtaining a target vibration isolation rate of the upper bushing of the shock absorber, judging the vibration isolation performance state based on the vibration isolation rate of the upper bushing of the shock absorber and the target vibration isolation rate of the upper bushing of the shock absorber, and adjusting the stiffness of the shock absorber bushing to determine the optimized stiffness of the shock absorber bushing;

[0120] It should be noted that the target vibration isolation rate of the bushing on the shock absorber reflects the characteristics of the ideal vibration isolation performance that is expected to be achieved, and the target vibration isolation rate of the bushing on the shock absorber needs to be pre-set based on the NVH performance requirements of the vehicle.

[0121] It can be understood that the current performance can be evaluated based on the shock absorber upper bushing vibration isolation rate and the target shock absorber upper bushing vibration isolation rate, so as to adjust the material, geometric structure or other relevant parameters of the shock absorber upper bushing to ensure that the abnormal noise of the shock absorber is effectively controlled and sufficient vibration isolation effect can be provided under various driving conditions to meet the requirements of vehicle comfort and NVH performance and enhance the driving experience.

[0122] Step C13, obtaining a target allowable stiffness value, and determining a bushing stiffness control abnormal noise state of the shock absorber based on the shock absorber bushing optimization stiffness and the target allowable stiffness value.

[0123] It should be noted that the target allowable stiffness value reflects the characteristics of the lowest stiffness limit allowed while ensuring that the vibration isolation performance of the bushing on the shock absorber reaches a predetermined target.

[0124] It can be understood that the target allowable stiffness value can ensure that the bushing on the shock absorber maintains sufficient structural strength during long-term use, avoid damage or failure due to material fatigue, and while improving the vibration isolation performance, ensure the durability of the bushing on the shock absorber, reduce the safety hazards caused by bushing damage, and improve the driving safety of the vehicle.

[0125] Step S22, adjusting the shock absorber parameters by performing shock absorber vibration control based on the abnormal noise state of the shock absorber upper bushing stiffness control, and determining the abnormal noise state of the shock absorber vibration control and the shock absorber optimization parameters;

[0126] It should be noted that the vibration control of the shock absorber body refers to reducing the vibration acceleration of the shock absorber within the abnormal sound frequency range. If the vibration of the shock absorber body, that is, the vibration of the upper end of the piston rod, exceeds the target value within the abnormal sound frequency range of the shock absorber, the vibration of the shock absorber body should be reduced.

[0127] It is understandable that the vibration of the shock absorber can be gradually reduced until the abnormal sound of the shock absorber disappears or the vibration of the shock absorber meets the target value. It is usually controlled by adjusting the shock absorber parameters such as the throttling area of ​​the flow valve, the viscosity of the oil, the gas pressure of the oil storage chamber, and the initial preload of the restoring valve. If the shock absorber is a damping adjustable shock absorber, the shock absorber damping can be adjusted by adjusting the shock absorber control current to control the shock absorber vibration. If the shock absorber vibration has met the target and the abnormal sound of the shock absorber still exists, the body panel vibration control is performed.

[0128] In addition, it should be noted that if Figure 5 As shown, Figure 5 This is a schematic diagram comparing the vibration of the shock absorber before and after the shock absorber parameters are adjusted for the automobile shock absorber abnormal noise optimization control method of this application. On the basis of reducing the stiffness of the shock absorber upper bushing, the shock absorber parameters such as the throttling area of ​​the flow valve, oil viscosity, and gas pressure in the oil storage chamber are adjusted, and the shock absorber vibration is significantly reduced.

[0129] For ease of understanding, the determination of the abnormal noise state of the shock absorber vibration control and the shock absorber optimization parameters is taken as an example for explanation, wherein the information acquisition device is the information acquisition module, the storage device is the memory, and the processing device is the processing module.

[0130] The information acquisition module obtains the abnormal noise state of the shock absorber upper bushing stiffness control and the shock absorber parameters and stores them in the memory. When the abnormal noise state of the shock absorber upper bushing stiffness control is that the abnormal noise still exists, the shock absorber body vibration target value is obtained. The shock absorber body vibration target value is the necessary target value of the shock absorber body vibration, that is, the target limit value of the vibration of the piston rod upper end, so as to control the shock absorber vibration acceleration within the abnormal noise frequency range. The vibration state is judged based on the shock absorber vibration acceleration in the shock absorber bushing stiffness and the shock absorber body vibration target value, the shock absorber parameters are adjusted to determine the shock absorber optimization parameters, and the shock absorber vibration control abnormal noise state is determined.

[0131] In a feasible implementation, step S22 may include steps D11 to D12:

[0132] Step D11, when the abnormal noise state of the bushing stiffness control on the shock absorber is that the abnormal noise still exists, obtaining the vibration target value of the shock absorber body;

[0133] It should be noted that the target value of the vibration of the shock absorber body reflects the characteristics of the ideal state or upper limit of the vibration performance of the shock absorber within a specific frequency range.

[0134] It is understandable that the shock absorber body vibration target value is pre-set according to the vehicle's NVH performance standards and shock absorber design requirements to ensure that the shock absorber can effectively control vibration under normal driving conditions, reduce the vibration transmitted to the vehicle body, and improve ride comfort.

[0135] Step D12, judging the vibration state based on the vibration acceleration of the shock absorber in the shock absorber bushing stiffness and the vibration target value of the shock absorber body, adjusting the shock absorber parameters to determine the shock absorber optimization parameters, and determining the abnormal sound state of the shock absorber vibration control.

[0136] It can be understood that by real-time monitoring of the shock absorber vibration acceleration and comparing it with the shock absorber body vibration target value, the current vibration state can be accurately judged, thereby achieving precise control of the shock absorber vibration, ensuring that it can maintain good performance under different driving conditions, effectively reducing or eliminating abnormal noise caused by shock absorber vibration, and improving ride comfort.

[0137] Step S23 , adjusting the body panel stiffness by performing body panel vibration control based on the abnormal noise state of the shock absorber vibration control, and determining the optimized body panel stiffness.

[0138] It should be noted that the vibration of the shock absorber is transmitted to the shock absorber installation point through the upper bushing of the shock absorber, causing the wheel cover and other body panels to vibrate. The body panel vibration radiates noise and produces abnormal noise of the shock absorber in the car. If the vibration of the shock absorber and the stiffness of the upper bushing of the shock absorber have been reduced to the minimum value or the target value, it is necessary to control the vibration of the body panel. Usually, the vibration of the body panel is controlled by the body installation point dynamic stiffness analysis and NTF analysis. The NTF analysis is an acoustic vibration transfer function analysis, but this analysis technology needs to be performed in the state of the body-in-white and the interior body. It is difficult to achieve in the later stage of vehicle project development, and the workload is large and the cost is high. Therefore, ODS analysis can be performed to obtain the actual vibration of the body panel under the operating conditions of the whole vehicle, find out the panels with larger vibration, and take measures to suppress their vibration. There is no need to disassemble the whole vehicle into the body-in-white and the interior body, nor is there any excitation equipment such as a force hammer or an exciter. Compared with the body-in-white installation point dynamic stiffness analysis and NTF analysis, it is simple and fast.

[0139] It can be understood that ODS analysis measures the vibration response of an object in a working state, and then directly uses the response in the time domain or frequency domain to display the deformation vibration mode. Unlike modal analysis, parameter extraction is required, while ODS directly uses the response of each measuring point to display the vibration mode. The response is the product of each modal vibration mode and the modal coordinates. Therefore, ODS is the linear superposition of each modal order, and the weighting coefficient is the modal coordinate. Since the response data can be in the time domain or the frequency domain, ODS is divided into time domain ODS and frequency domain ODS. Time domain ODS is the superposition of all modes at the current moment, and frequency domain ODS is the superposition of all modes at the current frequency.

[0140] In addition, it should be noted that if Figure 6 As shown, Figure 6 The figure is a schematic diagram of the influence of shock absorber parameters on the noise inside the car in the present application of the automobile shock absorber abnormal noise optimization control method. At this time, the thumping sound inside the car is further improved by 1.4dB(A) to 47.3dB(A), thereby obtaining an improvement effect. At this time, the peak frequency of the vehicle's shock absorber abnormal noise is 235Hz, which is the maximum contribution frequency of the shock absorber abnormal noise. Therefore, the working deformation of the body panel at 235Hz is analyzed, among which the left and right wheel arches, roof and side panels have the largest vibrations, which are the positions that contribute more to the abnormal noise. Since the improvement plan for the roof and side panels is not easy to implement, the plan to improve the stiffness of the wheel arch is adopted, such as Figure 7 As shown, Figure 7 This is a schematic diagram of the deformation of the body panel of the automobile shock absorber abnormal noise optimization control method in this application. After the implementation of the scheme, the vibration of the wheel cover is greatly reduced. Figure 8 As shown, Figure 8This is a schematic diagram of the improvement effect of wheel cover reinforcement on abnormal noise in the car according to the automobile shock absorber abnormal noise optimization control method applied in this application. The thudding sound in the car continued to be reduced by 0.7dB(A) to 46.6dB(A), the sound pressure level at 235Hz was reduced by 2dB(A), and the abnormal noise disappeared.

[0141] For ease of understanding, an example of determining the optimized stiffness of a vehicle body panel is used for explanation, wherein the information collection device is an information collection module, the storage device is a memory, and the processing device is a processing module.

[0142] The information acquisition module obtains the abnormal noise state of the shock absorber vibration control and the stiffness of the body panel and stores them in the memory. When the abnormal noise state of the shock absorber vibration control is that the abnormal noise still exists, the peak frequency of the abnormal noise of the shock absorber is determined, the vehicle is driven under the working condition where the abnormal noise of the shock absorber occurs, the vibration acceleration of each body panel is measured, and the working deformation analysis is performed based on the peak frequency of the abnormal noise of the shock absorber and the vibration acceleration of the body panel in the stiffness of the body panel, the working deformation of the body panel under the peak frequency of the abnormal noise of the shock absorber is obtained, the position of the panel with larger vibration is found, that is, the panel at the vibration position is obtained, the panel at the vibration position is optimized to determine the optimized stiffness of the body panel, and optimization measures are taken on the panel with larger vibration until the abnormal noise of the shock absorber disappears. The optimization measures include pasting reinforcement sheets on the panels or adding rib panels to improve the stiffness of the panels.

[0143] In a feasible implementation, step S23 may include step E11:

[0144] Step E11, when the abnormal noise state of the shock absorber vibration control is that the abnormal noise still exists, a working deformation analysis is performed based on the peak frequency of the shock absorber abnormal noise in the body panel stiffness and the vibration acceleration of the body panel, the vibration position panel is obtained, and the vibration position panel is optimized to determine the optimized stiffness of the body panel.

[0145] It can be understood that by accurately analyzing and identifying the specific body panels that produce abnormal noise, the components that produce the abnormal noise can be optimized and the stiffness of the body panels can be adjusted to reduce vibration and abnormal noise and improve ride comfort.

[0146] The automobile shock absorber abnormal noise optimization control method proposed in this embodiment performs shock absorber upper bushing stiffness control to adjust the shock absorber bushing stiffness based on the shock absorber abnormal noise state, and determines the shock absorber upper bushing stiffness control abnormal noise state and the shock absorber optimized stiffness; performs shock absorber vibration control to adjust the shock absorber parameters based on the shock absorber upper bushing stiffness control abnormal noise state, and determines the shock absorber vibration control abnormal noise state and the shock absorber optimized parameters; performs body panel vibration control to adjust the body panel stiffness based on the shock absorber vibration control abnormal noise state, and determines the body panel optimized stiffness. The technical problem of how to accurately detect and optimize the abnormal noise generated by the shock absorber is solved. Compared with the prior art, the present application optimizes the vibration isolation performance by adjusting the stiffness of the bushing on the shock absorber by accurately controlling the stiffness of the shock absorber, the shock absorber parameters and the stiffness of the body panel, and optimizes the parameters of the shock absorber based on the improved state of the shock absorber bushing to control the vibration state and further eliminate the abnormal noise. At the same time, for the abnormal noise that still exists after the above adjustment, the body panel with large vibration is found according to the vibration control of the body panel, and the body panel is adjusted and optimized to optimize the stiffness of the body panel, thereby effectively reducing or eliminating the abnormal noise, improving ride comfort, and improving the efficiency of diagnosis and optimization of abnormal noise, reducing development and maintenance costs, and enhancing the market competitiveness of automobiles.

[0147] It should be noted that the above examples are only used to understand the present application and do not constitute a limitation on the method for optimizing the control of abnormal noise of automobile shock absorbers of the present application. More simple transformations based on this technical concept are all within the scope of protection of the present application.

[0148] This application also provides a vehicle shock absorber abnormal noise optimization control device, please refer to Fig. 9 The abnormal noise optimization control device for automobile shock absorber comprises:

[0149] The acquisition module 10 is used to collect the shock absorber abnormal noise test diagnosis signal, shock absorber bushing stiffness, shock absorber parameters and body panel stiffness of the vehicle driving on the target abnormal noise generating section, and perform spectrum analysis to determine the abnormal noise source and obtain the shock absorber abnormal noise state;

[0150] A processing module 20, configured to determine an optimized stiffness of a shock absorber bushing, an optimized parameter of a shock absorber, and an optimized stiffness of a body panel based on the abnormal sound state of the shock absorber, the stiffness of the shock absorber bushing, the shock absorber parameter, and the stiffness of the body panel;

[0151] The execution module 30 is configured to control the vehicle to eliminate abnormal noise of the shock absorber based on the shock absorber bushing stiffness, the shock absorber parameters, the body panel stiffness, the shock absorber bushing optimized stiffness, the shock absorber optimized parameters and the body panel optimized stiffness.

[0152] The acquisition module 10 is also used to acquire shock absorber vibration signals, in-vehicle noise signals, shock absorber vibration acceleration, wheel cover vibration acceleration, flow valve throttling area, oil viscosity, oil storage chamber gas pressure, restoration valve initial preload, shock absorber control current, shock absorber abnormal sound peak frequency, body panel vibration acceleration;

[0153] determining a shock absorber abnormal noise test diagnostic signal based on the shock absorber vibration signal and the in-vehicle noise signal;

[0154] determining a shock absorber bushing stiffness based on the shock absorber vibration acceleration and the wheel house vibration acceleration;

[0155] Determining shock absorber parameters based on the throttling area of ​​the flow valve, the oil viscosity, the gas pressure of the oil storage chamber, the initial preload force of the restoring valve and the shock absorber control current;

[0156] A body panel stiffness is determined based on the shock absorber squeal peak frequency and the body panel vibration acceleration.

[0157] The processing module 20 is further used to perform a stiffness control of the upper bushing of the shock absorber based on the abnormal noise state of the shock absorber to adjust the stiffness of the shock absorber bushing, and determine the abnormal noise state of the upper bushing stiffness control of the shock absorber and the optimized stiffness of the shock absorber bushing;

[0158] Based on the abnormal noise state of the bushing stiffness control on the shock absorber, the shock absorber vibration control is performed to adjust the shock absorber parameters, and the abnormal noise state of the shock absorber vibration control and the shock absorber optimization parameters are determined;

[0159] The body panel vibration control is performed based on the abnormal noise state of the shock absorber vibration control to adjust the body panel stiffness and determine the optimized stiffness of the body panel.

[0160] The processing module 20 is further used to calculate the vibration isolation rate of the upper bushing of the shock absorber based on the vibration acceleration of the shock absorber and the vibration acceleration of the wheel cover in the stiffness of the shock absorber bushing when the abnormal noise state of the shock absorber is that the shock absorber generates abnormal noise;

[0161] Obtaining a target vibration isolation rate of an upper bushing of a shock absorber, judging a vibration isolation performance state based on the vibration isolation rate of the upper bushing of the shock absorber and the target vibration isolation rate of the upper bushing of the shock absorber, and adjusting the stiffness of the shock absorber bushing to determine an optimized stiffness of the shock absorber bushing;

[0162] A target allowable stiffness value is obtained, and a stiffness control abnormal noise state of the shock absorber upper bushing is determined based on the shock absorber bushing optimization stiffness and the target allowable stiffness value.

[0163] The processing module 20 is further configured to obtain a vibration target value of the shock absorber body when the abnormal noise state of the bushing stiffness control on the shock absorber is that the abnormal noise still exists;

[0164] The vibration state is judged based on the vibration acceleration of the shock absorber in the shock absorber bushing stiffness and the vibration target value of the shock absorber body, the shock absorber parameters are adjusted to determine the shock absorber optimization parameters, and the abnormal sound state of the shock absorber vibration control is determined.

[0165] The processing module 20 is also used to perform working deformation analysis based on the peak frequency of the shock absorber abnormal noise in the body panel stiffness and the vibration acceleration of the body panel when the shock absorber vibration control abnormal noise state is that the abnormal noise still exists, obtain the vibration position panel, and optimize the vibration position panel to determine the optimized stiffness of the body panel.

[0166] The execution module 30 is further configured to control the vehicle to eliminate the abnormal noise of the shock absorber based on the stiffness of the shock absorber bushing, the shock absorber parameter and the stiffness of the vehicle body panel when the abnormal noise state of the shock absorber is that the shock absorber does not generate abnormal noise;

[0167] When the abnormal noise state of the bushing stiffness control on the shock absorber is that there is no abnormal noise, controlling the vehicle to eliminate the abnormal noise of the shock absorber based on the optimized stiffness of the shock absorber bushing, the shock absorber parameters and the stiffness of the vehicle body panel;

[0168] When the abnormal noise state of the shock absorber vibration control is that there is no abnormal noise, controlling the vehicle to eliminate the abnormal noise of the shock absorber based on the optimized stiffness of the shock absorber bushing, the optimized parameters of the shock absorber and the stiffness of the vehicle body panel;

[0169] When the shock absorber abnormal noise state is that the shock absorber produces abnormal noise and the shock absorber upper bushing stiffness control abnormal noise state is that the abnormal noise still exists and the shock absorber vibration control abnormal noise state is that the abnormal noise still exists, the vehicle is controlled to eliminate the shock absorber abnormal noise based on the shock absorber bushing optimized stiffness, the shock absorber optimization parameters and the body panel optimized stiffness.

[0170] The automobile shock absorber abnormal noise optimization control device provided by the present application adopts the automobile shock absorber abnormal noise optimization control method in the above embodiment, which can solve the technical problem of how to effectively diagnose and optimize the shock absorber abnormal noise. Compared with the prior art, the beneficial effects of the automobile shock absorber abnormal noise optimization control device provided by the present application are the same as the beneficial effects of the automobile shock absorber abnormal noise optimization control method provided by the above embodiment, and the other technical features in the automobile shock absorber abnormal noise optimization control device are the same as the features disclosed in the above embodiment method, which will not be repeated here.

[0171] The present application provides an automobile shock absorber abnormal noise optimization control device, and the automobile shock absorber abnormal noise optimization control device includes: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the automobile shock absorber abnormal noise optimization control method in the above-mentioned embodiment 1.

[0172] Reference below Fig.10 , which shows a schematic diagram of the structure of the vehicle shock absorber abnormal noise optimization control device suitable for implementing the embodiment of the present application. The vehicle shock absorber abnormal noise optimization control device in the embodiment of the present application may include but is not limited to mobile terminals such as mobile phones, laptop computers, digital broadcast receivers, PDAs (Personal Digital Assistants), PADs (Portable Application Descriptions), PMPs (Portable Media Players), vehicle-mounted terminals (such as vehicle-mounted navigation terminals), etc., and fixed terminals such as digital TVs, desktop computers, etc. Fig.10 The automobile shock absorber abnormal noise optimization control device shown is only an example and should not bring any limitation to the functions and scope of use of the embodiments of the present application.

[0173] like Fig.10 As shown, the automobile shock absorber abnormal noise optimization control device may include a processing device 1001 (such as a central processing unit, a graphics processor, etc.), which can perform various appropriate actions and processes according to the program stored in the read-only memory (ROM: Read Only Memory) 1002 or the program loaded from the storage device 1003 to the random access memory (RAM: Random Access Memory) 1004. In the RAM1004, various programs and data required for the operation of the automobile shock absorber abnormal noise optimization control device are also stored. The processing device 1001, ROM1002 and RAM1004 are connected to each other through a bus 1005. An input / output (I / O) interface 1006 is also connected to the bus. Typically, the following systems can be connected to the I / O interface 1006: input devices 1007 including, for example, a touch screen, a touchpad, a keyboard, a mouse, an image sensor, a microphone, an accelerometer, a gyroscope, etc.; output devices 1008 including, for example, a liquid crystal display (LCD), a speaker, a vibrator, etc.; storage devices 1003 including, for example, a magnetic tape, a hard disk, etc.; and communication devices 1009. The communication device 1009 can allow the automobile shock absorber abnormal sound optimization control device to communicate wirelessly or wired with other devices to exchange data. Although the figure shows an automobile shock absorber abnormal sound optimization control device with various systems, it should be understood that it is not required to implement or have all the systems shown. More or fewer systems may be implemented or have alternatively.

[0174] In particular, according to the embodiments disclosed in the present application, the process described above with reference to the flowchart can be implemented as a computer software program. For example, the embodiments disclosed in the present application include a computer program product, which includes a computer program carried on a computer-readable medium, and the computer program includes a program code for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from a network through a communication device, or installed from a storage device 1003, or installed from a ROM 1002. When the computer program is executed by the processing device 1001, the above-mentioned functions defined in the method of the embodiment disclosed in the present application are executed.

[0175] The automobile shock absorber abnormal noise optimization control device provided by the present application adopts the automobile shock absorber abnormal noise optimization control method in the above embodiment, which can solve the technical problem of how to effectively diagnose and optimize the shock absorber abnormal noise. Compared with the prior art, the beneficial effects of the automobile shock absorber abnormal noise optimization control device provided by the present application are the same as the beneficial effects of the automobile shock absorber abnormal noise optimization control method provided by the above embodiment, and the other technical features in the automobile shock absorber abnormal noise optimization control device are the same as the features disclosed in the method of the previous embodiment, which will not be repeated here.

[0176] It should be understood that the various parts disclosed in this application can be implemented by hardware, software, firmware or a combination thereof. In the description of the above embodiments, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0177] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

[0178] The present application provides a computer-readable storage medium having computer-readable program instructions (ie, computer programs) stored thereon, and the computer-readable program instructions are used to execute the automobile shock absorber abnormal noise optimization control method in the above-mentioned embodiment.

[0179] The computer-readable storage medium provided in the present application may be, for example, a USB flash drive, but is not limited to electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, systems or devices, or any combination of the above. More specific examples of computer-readable storage media may include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In this embodiment, the computer-readable storage medium may be any tangible medium containing or storing a program that can be used by or in combination with an instruction execution system, system or device. The program code contained on the computer-readable storage medium may be transmitted using any appropriate medium, including but not limited to: wires, optical cables, RF (Radio Frequency), etc., or any suitable combination of the above.

[0180] The computer-readable storage medium may be included in the vehicle shock absorber abnormal noise optimization control device; or may exist independently without being assembled into the vehicle shock absorber abnormal noise optimization control device.

[0181] The computer-readable storage medium carries one or more programs. When the one or more programs are executed by the automobile shock absorber abnormal noise optimization control device, the automobile shock absorber abnormal noise optimization control device: collects the shock absorber abnormal noise test diagnosis signal, shock absorber bushing stiffness, shock absorber parameters and body panel stiffness of the vehicle traveling in the target abnormal noise occurrence section, and performs spectrum analysis to determine the abnormal noise source to obtain the shock absorber abnormal noise state; determines the shock absorber bushing optimization stiffness, shock absorber optimization parameters and body panel optimization stiffness based on the shock absorber abnormal noise state, the shock absorber bushing stiffness, the shock absorber optimization parameters and the body panel optimization stiffness; controls the vehicle to eliminate the shock absorber abnormal noise based on the shock absorber bushing stiffness, the shock absorber parameters, the body panel stiffness, the shock absorber bushing optimization stiffness, the shock absorber optimization parameters and the body panel optimization stiffness.

[0182] Computer program code for performing the operations of the present application may be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, C++, and conventional procedural programming languages ​​such as "C" or similar programming languages. The program code may be executed entirely on the user's computer, partially on the user's computer, as a separate software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0183] The flow chart and block diagram in the accompanying drawings illustrate the possible architecture, function and operation of the system, method and computer program product according to various embodiments of the present application. In this regard, each square box in the flow chart or block diagram can represent a module, a program segment or a part of a code, and the module, the program segment or a part of the code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the square box can also occur in a sequence different from that marked in the accompanying drawings. For example, two square boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each square box in the block diagram and / or flow chart, and the combination of the square boxes in the block diagram and / or flow chart can be implemented with a dedicated hardware-based system that performs a specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0184] The modules involved in the embodiments described in this application may be implemented by software or hardware, wherein the name of the module does not constitute a limitation on the unit itself in some cases.

[0185] The readable storage medium provided in the present application is a computer-readable storage medium, which stores computer-readable program instructions (i.e., computer programs) for executing the above-mentioned automobile shock absorber abnormal noise optimization control method, and can solve the technical problem of how to effectively diagnose and optimize the shock absorber abnormal noise. Compared with the prior art, the beneficial effects of the computer-readable storage medium provided in the present application are the same as the beneficial effects of the automobile shock absorber abnormal noise optimization control method provided in the above-mentioned embodiment, and will not be repeated here.

[0186] The above descriptions are only some embodiments of the present application, and are not intended to limit the patent scope of the present application. All equivalent structural changes made using the contents of the present application specification and drawings under the technical concept of the present application, or direct / indirect applications in other related technical fields are included in the patent protection scope of the present application.

Claims

1. A method for optimizing the abnormal noise control of automobile shock absorbers, characterized in that: The method includes: Collect the shock absorber abnormal noise test diagnostic signal, shock absorber bushing stiffness, shock absorber parameters and body panel stiffness of the vehicle driving on the target abnormal noise section, and perform spectrum analysis to determine the abnormal noise source and obtain the shock absorber abnormal noise status; determining a shock absorber bushing optimized stiffness, a shock absorber optimized parameter, and a body panel optimized stiffness based on the shock absorber abnormal sound state, the shock absorber bushing stiffness, the shock absorber parameter, and the body panel stiffness; A vehicle is controlled to eliminate shock absorber squeaks based on the shock absorber bushing stiffness, the shock absorber parameters, the body panel stiffness, the shock absorber bushing optimized stiffness, the shock absorber optimized parameters, and the body panel optimized stiffness.

2. The method according to claim 1, characterized in that The step of collecting the shock absorber abnormal noise test diagnosis signal, shock absorber bushing stiffness, shock absorber parameters and body panel stiffness of the vehicle traveling in the target abnormal noise generating section comprises: Obtain shock absorber vibration signal, in-vehicle noise signal, shock absorber vibration acceleration, wheel cover vibration acceleration, flow valve throttling area, oil viscosity, oil storage chamber gas pressure, recovery valve initial preload, shock absorber control current, shock absorber abnormal sound peak frequency, body panel vibration acceleration; determining a shock absorber abnormal noise test diagnostic signal based on the shock absorber vibration signal and the in-vehicle noise signal; determining a shock absorber bushing stiffness based on the shock absorber vibration acceleration and the wheel house vibration acceleration; Determining shock absorber parameters based on the throttling area of ​​the flow valve, the oil viscosity, the gas pressure of the oil storage chamber, the initial preload force of the restoring valve and the shock absorber control current; A body panel stiffness is determined based on the shock absorber squeal peak frequency and the body panel vibration acceleration.

3. The method according to claim 1, characterized in that The step of determining the optimized stiffness of the shock absorber bushing, the optimized parameters of the shock absorber and the optimized stiffness of the body panel based on the abnormal sound state of the shock absorber, the stiffness of the shock absorber bushing, the shock absorber parameters and the stiffness of the body panel comprises: Based on the abnormal noise state of the shock absorber, the stiffness of the shock absorber upper bushing is controlled to adjust the stiffness of the shock absorber bushing, and the abnormal noise state of the shock absorber upper bushing stiffness control and the optimized stiffness of the shock absorber bushing are determined; Based on the abnormal noise state of the bushing stiffness control on the shock absorber, the shock absorber vibration control is performed to adjust the shock absorber parameters, and the abnormal noise state of the shock absorber vibration control and the shock absorber optimization parameters are determined; The body panel vibration control is performed based on the abnormal noise state of the shock absorber vibration control to adjust the body panel stiffness and determine the optimized stiffness of the body panel.

4. The method according to claim 3, characterized in that The steps of controlling the stiffness of the upper bushing of the shock absorber based on the abnormal noise state of the shock absorber to adjust the stiffness of the shock absorber bushing, and determining the abnormal noise state of the upper bushing stiffness control of the shock absorber and the optimized stiffness of the shock absorber bushing include: When the abnormal noise state of the shock absorber is that the shock absorber generates abnormal noise, the vibration isolation rate of the upper bushing of the shock absorber is calculated based on the vibration acceleration of the shock absorber and the vibration acceleration of the wheel cover in the stiffness of the shock absorber bushing; Obtaining a target vibration isolation rate of an upper bushing of a shock absorber, judging a vibration isolation performance state based on the vibration isolation rate of the upper bushing of the shock absorber and the target vibration isolation rate of the upper bushing of the shock absorber, and adjusting the stiffness of the shock absorber bushing to determine an optimized stiffness of the shock absorber bushing; A target allowable stiffness value is obtained, and a stiffness control abnormal noise state of the shock absorber upper bushing is determined based on the shock absorber bushing optimization stiffness and the target allowable stiffness value.

5. The method according to claim 3, characterized in that The step of adjusting the shock absorber parameters by performing shock absorber vibration control based on the abnormal noise state of the shock absorber upper bushing stiffness control, and determining the abnormal noise state of the shock absorber vibration control and the shock absorber optimization parameters comprises: When the abnormal noise state of the bushing stiffness control on the shock absorber is that the abnormal noise still exists, obtaining a vibration target value of the shock absorber body; The vibration state is judged based on the vibration acceleration of the shock absorber in the shock absorber bushing stiffness and the vibration target value of the shock absorber body, the shock absorber parameters are adjusted to determine the shock absorber optimization parameters, and the abnormal sound state of the shock absorber vibration control is determined.

6. The method according to claim 3, characterized in that The step of adjusting the stiffness of the body panel by performing body panel vibration control based on the abnormal noise state of the shock absorber vibration control and determining the optimized stiffness of the body panel comprises: When the abnormal noise state of the shock absorber vibration control is that the abnormal noise still exists, a working deformation analysis is performed based on the peak frequency of the shock absorber abnormal noise in the body panel stiffness and the vibration acceleration of the body panel, the vibration position panel is obtained, and the vibration position panel is optimized to determine the optimized stiffness of the body panel.

7. The method according to claim 1, characterized in that The step of controlling the vehicle to eliminate abnormal noise of the shock absorber based on the shock absorber bushing stiffness, the shock absorber parameter, the body panel stiffness, the shock absorber bushing optimized stiffness, the shock absorber optimized parameter and the body panel optimized stiffness comprises: When the abnormal noise state of the shock absorber is that the shock absorber does not generate abnormal noise, controlling the vehicle to eliminate the abnormal noise of the shock absorber based on the stiffness of the shock absorber bushing, the shock absorber parameter and the stiffness of the vehicle body panel; When the abnormal noise state of the bushing stiffness control on the shock absorber is that there is no abnormal noise, controlling the vehicle to eliminate the abnormal noise of the shock absorber based on the optimized stiffness of the shock absorber bushing, the shock absorber parameters and the stiffness of the vehicle body panel; When the abnormal noise state of the shock absorber vibration control is that there is no abnormal noise, controlling the vehicle to eliminate the abnormal noise of the shock absorber based on the optimized stiffness of the shock absorber bushing, the optimized parameters of the shock absorber and the stiffness of the vehicle body panel; When the shock absorber abnormal noise state is that the shock absorber produces abnormal noise and the shock absorber upper bushing stiffness control abnormal noise state is that the abnormal noise still exists and the shock absorber vibration control abnormal noise state is that the abnormal noise still exists, the vehicle is controlled to eliminate the shock absorber abnormal noise based on the shock absorber bushing optimized stiffness, the shock absorber optimization parameters and the body panel optimized stiffness.

8. An optimized control device for abnormal noise of automobile shock absorber, characterized in that: The device comprises: An acquisition module is used to collect the shock absorber abnormal noise test diagnosis signal, shock absorber bushing stiffness, shock absorber parameters and body panel stiffness of the vehicle when the vehicle is driving on the target abnormal noise section, and perform spectrum analysis to determine the abnormal noise source and obtain the shock absorber abnormal noise state; a processing module, configured to determine a shock absorber bushing optimized stiffness, a shock absorber optimized parameter, and a body panel optimized stiffness based on the shock absorber abnormal sound state, the shock absorber bushing stiffness, the shock absorber parameter, and the body panel stiffness; An execution module is configured to control a vehicle to eliminate abnormal sound of a shock absorber based on the shock absorber bushing stiffness, the shock absorber parameter, the body panel stiffness, the shock absorber bushing optimized stiffness, the shock absorber optimized parameter and the body panel optimized stiffness.

9. An automobile shock absorber abnormal noise optimization control device, characterized in that: The device comprises: a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the computer program is configured to implement the steps of the method for optimizing the abnormal noise control of an automobile shock absorber according to any one of claims 1 to 7.

10. A storage medium, characterized in that: The storage medium is a computer-readable storage medium, and a computer program is stored on the storage medium. When the computer program is executed by a processor, the steps of the automobile shock absorber abnormal noise optimization control method as described in any one of claims 1 to 7 are implemented.

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