Commercial vehicle sight glass jitter control method, device and equipment and storage medium

Abstract

The invention provides a commercial vehicle sight glass jitter control method, device and equipment and a storage medium, and belongs to the technical field of commercial vehicle sight glass. Establishing a sight glass, vehicle door and vehicle body finite element model, and performing simulation analysis and optimization on a sight glass first-order modal control index; through a mirror surface vibration response test and NVH analysis of a test result, a view mirror original point frequency response acceleration response amplitude control mode is made; analyzing and judging whether the acceleration response amplitude value under the sight glass first-order modal control index information is smaller than the mirror plane origin frequency response acceleration response amplitude value of the preset sight glass under the sight glass first-order modal control index; and if yes, analyzing to obtain that the sight glass design meets the jitter requirement. By optimizing the sight glass body structure and the vehicle body or vehicle door structure, the frequency response acceleration response of the original point of the mirror surface of each sight glass is reduced, the aim that various sight glasses do not shake under the full working condition is achieved, and the vehicle driving safety is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of commercial vehicle mirrors, and in particular relates to a commercial vehicle mirror jitter control method, device, equipment and storage medium. Background Art

[0002] In the design and manufacturing process of commercial vehicles, mirrors are important tools for drivers to observe the surrounding environment of the vehicle, and their stability and reliability are crucial. However, since the vehicle is affected by various vibration sources such as the road surface, engine, and transmission system during driving, the mirrors often vibrate to varying degrees. This vibration is not only related to the natural frequency and damping characteristics of the mirror itself, but also affected by the vibration transmission and coupling of surrounding components such as doors and body.

[0003] With the development of commercial vehicle technology, NVH performance has received more and more attention, which directly affects the overall experience of commercial vehicles. However, the mirror vibration control method mostly relies on empirical design, that is, trying to reduce vibration by constantly modifying the mirror fixing method, adding shock-absorbing elements, etc. However, this method is not only inefficient, but also difficult to accurately predict and control the vibration behavior of the mirror under different working conditions. Summary of the invention

[0004] The present invention provides a method for controlling the jitter of a commercial vehicle mirror, so as to at least solve the problem that in the prior art, only strength analysis is performed on the mirror in the early stage of design, and the jitter cannot be effectively controlled.

[0005] Methods include: S101: defining vehicle component status information matching the mirror and formulating the first-order modal control index of the mirror; S102: establishing finite element models of the mirror, the door and the vehicle body, and performing simulation analysis and optimization on the first-order modal control index of the mirror, so that the first-order modal control index of the mirror meets the first-order modal frequency avoidance requirement of the mirror; S103: by conducting a mirror vibration response test under real vehicle idling conditions, acceleration, and constant speed driving conditions on the mirror of a preset vehicle model, and performing NVH analysis on the test results, a control method for the acceleration response amplitude of the mirror origin frequency response under real vehicle idling conditions, acceleration, and constant speed driving conditions is formulated; S104: Based on the established finite element models of the mirror, the door and the vehicle body, analyzing and determining whether the acceleration response amplitude of the mirror origin frequency response under the first-order modal control index information of the mirror is less than the acceleration response amplitude of the mirror origin frequency response under the first-order modal control index of the mirror; If it is less than, the analysis shows that the mirror design meets the jitter requirements.

[0006] It should be further explained that step S101 also includes: defining the vehicle component status information matching the mirror including: engine information, air compressor information, engine idle air conditioning off, air conditioning on state corresponding to the engine speed information, air compressor and engine speed ratio information.

[0007] It should be further explained that in the method, the third-order excitation frequency of the engine and the first-order excitation frequency of the air compressor corresponding to the idle air conditioning off and air conditioning on states are calculated based on the vehicle component status information; The third-order excitation frequency f1 of the engine is calculated by the following formula: f1=(n / 60)*p; Where n is the engine idle speed with the air conditioner on / off, and p is the number of engine cylinders; The first-order excitation frequency f2 of the air compressor is calculated by the following formula: f2=(n / 60)*i; Wherein, n is the engine idle speed with the air conditioner off / on, and i is the ratio of the air compressor speed to the engine speed.

[0008] It should be further noted that step S101 also includes: mirror matching tire information of the vehicle model; Tire information includes: tire width, aspect ratio and rim diameter, and calculates the tire rolling radius; Calculate the first-order and second-order excitation frequencies of the tire based on the vehicle speed range information and tire rolling radius of the mirror-matched vehicle model; The tire order excitation f3 is calculated by the following formula: f3=C*(V / (πD)); Where C is the tire order, which can be -1 or 2, V is the maximum speed of the vehicle, and D is the tire diameter; The tire diameter D is calculated using the following formula: D=D1*2.54 / 2*0.01+H*j*0.001; Where D1 is the rim diameter, H is the tire width, and j is the aspect ratio.

[0009] It should be further explained that in the method: according to the engine information, the air compressor information, and the tire excitation frequency, the first-order modal frequency avoidance requirement of the mirror is defined: The relationship between the first-order modal control index of the mirror and the first-order modal frequency avoidance requirement of the mirror is: The first-order modal control index of the sight mirror is ≥ excitation frequency + 2Hz.

[0010] It should be further explained that, in step S102, the simulation analysis and optimization method of the first-order modal control index of the mirror includes: The connection method between the mirror body and the mirror arm is set, and the mirror support and the mirror arm structure are reinforced with high elastic modulus materials, so that the first-order modal control index of the mirror meets the first-order modal frequency avoidance requirement of the mirror.

[0011] It should be further explained that, after step S104, the following steps are also included: Based on the actual vehicle idling conditions, acceleration conditions, and constant speed driving conditions, the mirror vibration response test is carried out; Conduct NVH analysis on the test results; Obtain the first-order modal control index information of the mirror under each working condition; According to the established finite element models of the mirror, door and body, a local coordinate system and mirror excitation response points are established in the normal direction of the mirror to perform origin frequency response acceleration response analysis; Analyze and determine whether the acceleration response amplitude of the mirror origin frequency response under the first-order modal control index information of the mirror is less than the acceleration response amplitude of the mirror origin frequency response under the first-order modal control index of the preset mirror; If it is less than, the analysis shows that the mirror design meets the jitter requirements; If it is greater than, the mirror is re-optimized.

[0012] The present application also provides a commercial vehicle mirror vibration control device, the device comprising: An information definition module is used to define the vehicle component status information that matches the mirror and formulate the first-order modal control index of the mirror; The simulation analysis module is used to establish the finite element model of the mirror, door and body, and to simulate and analyze and optimize the first-order modal control index of the mirror so that the first-order modal control index of the mirror meets the frequency avoidance rule; The test analysis module is used to test the mirror vibration response of the preset vehicle model under the conditions of idle speed, acceleration and constant speed driving, and to perform NVH analysis on the test results, so as to formulate the control method of the acceleration response amplitude of the mirror origin frequency response under the conditions of idle speed, acceleration and constant speed driving; A response analysis module is used to analyze and determine whether the acceleration response amplitude of the mirror origin frequency response under the first-order modal control index information of the mirror is less than the acceleration response amplitude of the mirror origin frequency response under the first-order modal control index of the mirror set based on the established finite element model of the mirror, the door and the body; If it is less than, the analysis shows that the mirror design meets the jitter requirements.

[0013] According to another embodiment of the present application, an electronic device is provided, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the commercial vehicle mirror jitter control method when executing the program.

[0014] According to another embodiment of the present application, a storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the steps of the commercial vehicle mirror jitter control method are implemented.

[0015] It can be seen from the above technical solutions that the present invention has the following advantages: The commercial vehicle mirror jitter control method provided in this application defines the vehicle component status information that matches the mirror; establishes the finite element model of the mirror, door and body, and performs simulation analysis and optimization on the first-order modal control index of the mirror; performs mirror vibration response test of the preset vehicle model under the idle condition, acceleration and uniform speed driving condition, and performs NVH analysis on the test results, so as to control the amplitude of the acceleration response of the mirror origin frequency response of the mirror; analyzes and judges whether the acceleration response amplitude under the first-order modal control index information of the mirror is less than the amplitude of the acceleration response of the mirror origin frequency response of the preset mirror under the first-order modal control index of the mirror; if less than, it is analyzed that the mirror design meets the jitter requirements. It can be seen that based on the simulation analysis and optimization of the first-order modal control index of the mirror, after the first-order modal control index of the mirror meets the first-order modal frequency avoidance requirements of the mirror, it can avoid the influence of engine vibration, road excitation, etc., thereby reducing the jitter caused by resonance and improving the stability of the mirror. Thus, the stable mirror enables the driver to clearly observe the rear situation and improve driving safety.

[0016] This application is based on the development of a control method for the amplitude of the acceleration response of the mirror surface origin frequency response under the actual vehicle idling, acceleration, and constant speed driving conditions, which can reduce the vibration amplitude of the rearview mirror of commercial vehicles under idling, acceleration, and constant speed driving conditions, and improve the stability of the rearview mirror. By controlling the vibration of the rearview mirror, it can ensure that the driver can clearly observe the situation behind the vehicle during driving, thereby improving driving safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solution of the present invention, the accompanying drawings required for use in the description will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0018] Figure 1 The flowchart of the commercial vehicle mirror vibration control method is as follows; Figure 2 This is an example flow chart of a commercial vehicle mirror vibration control method; Figure 3 This is a flow chart of an embodiment of a method for controlling mirror vibration of a commercial vehicle; Figure 4 A flow chart of another embodiment of a method for controlling mirror vibration of a commercial vehicle; Figure 5 It is a schematic diagram of a mirror vibration control device for a commercial vehicle; Figure 6 Schematic diagram of the hardware structure of the electronic device. DETAILED DESCRIPTION

[0019] The specific implementation process of the commercial vehicle mirror jitter control method will be described in detail below. For the purpose of illustration rather than limitation, specific details such as specific system structures and technologies are proposed to facilitate a thorough understanding of the embodiments of the present application. However, it should be clear to those skilled in the art that the present application can also be implemented in other embodiments without these specific details.

[0020] It should be understood that, in describing the commercial vehicle mirror jitter control method, the term "including" is used to indicate the presence of the described features, entities, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, entities, steps, operations, elements, components and / or their collections. The terms "including", "comprising", "having" and their variations all mean "including but not limited to", unless otherwise specifically emphasized.

[0021] It should be understood that the "one or more" mentioned in this application refers to one, two or more than two, and the "multiple" mentioned in this application refers to two or more. In the description of this application, unless otherwise specified, " / " means or, for example, A / B can mean A or B. The "and / or" in this article is just a way to describe the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone.

[0022] The phrases such as "one embodiment" or "some embodiments" described in the present application mean that the specific features, structures or characteristics described in the embodiment are included in one or more embodiments of the present application. Therefore, the phrases such as "in one embodiment", "in some embodiments", "in some other embodiments", "in some other embodiments" etc. that appear in different places in the present application do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways.

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] See also Figure 1 The figure is a flow chart of a commercial vehicle mirror vibration control method in a specific embodiment, the method comprising: S101: Define vehicle component status information matching the mirror, and formulate the first-order modal control index of the mirror.

[0025] In some embodiments, vehicle component status information may be considered for the jitter control design of commercial vehicle mirrors.

[0026] Vehicle component status information includes but is not limited to door open or closed status, body stiffness, suspension system characteristics, engine and transmission system vibration characteristics, etc.

[0027] The operating status information of vehicle components includes stress conditions and vibration responses that affect the vibration of the mirror.

[0028] In some specific embodiments, the door or the vehicle body is used as the installation base of the mirror, and the rigidity and stability of the door or the vehicle body directly affect the shaking of the mirror. The state information of the door or the vehicle body includes the material, thickness, reinforcement plate structure and installation point position of the door.

[0029] The performance of the vehicle suspension system has an important impact on the vibration transmission during vehicle driving, which in turn affects the stability of the mirror. The status information of the suspension system includes spring stiffness, shock absorber damping coefficient, suspension arm length, etc.

[0030] In addition to the doors and vehicle suspension system, the engine speed, load, etc. will also affect the overall vibration of the vehicle.

[0031] This embodiment controls the vibration of the mirror by determining the range within which the vibration amplitude of the mirror at a specific frequency should be controlled, thereby ensuring the stability of the mirror and the clarity of the driver's vision.

[0032] In some embodiments, the anti-vibration performance of the rearview mirror can be evaluated by the first-order natural frequency of the rearview mirror. For the first-order natural frequency, the higher it is, the less likely the rearview mirror will resonate when it is vibrated, thereby reducing the vibration. This embodiment also takes into account that the damping ratio reflects the energy dissipation capacity of the rearview mirror system during the vibration process. An appropriate damping ratio can accelerate the attenuation speed of the rearview mirror vibration and improve stability.

[0033] The defined first-order modal control index of the rearview mirror can also control the vibration displacement of the mirror within a certain range under excitation conditions, such as engine vibration, vibration caused by road roughness, etc., to ensure that the driver can clearly observe the rear situation through the rearview mirror.

[0034] The above method can use finite element analysis software to perform modal analysis on the rearview mirror to obtain key parameters such as its first-order natural frequency. By changing the material, structure and other parameters of the rearview mirror, its anti-vibration performance can be optimized.

[0035] In this embodiment, the vehicle can be subjected to an actual road test or a simulation test. Regardless of the simulation test or the actual road test, the vibration of the rearview mirror can be monitored by a sensor to verify the accuracy of the simulation analysis results. At the same time, the control index can be adjusted according to the test results to ensure the stability of the rearview mirror in actual use.

[0036] In this way, by defining the vehicle component status information that matches the mirror and formulating reasonable first-order modal control indicators of the mirror, the jitter problem of the commercial vehicle mirror can be effectively controlled to improve driving safety and driving comfort.

[0037] S102: Establish finite element models of the mirror, the door and the vehicle body, and perform simulation analysis and optimization on the first-order modal control index of the mirror, so that the first-order modal control index of the mirror meets the first-order modal frequency avoidance requirement of the mirror.

[0038] In some embodiments, finite element models of the mirror, door and body are established based on finite element analysis software. The finite element models of the mirror, door and body can reflect the geometric shape, material properties and connection relationship of each component.

[0039] This embodiment can also perform meshing on the finite element models of the mirror, door and body, so that a finer mesh is used in the mirror area to improve the analysis accuracy.

[0040] In this embodiment, the fixing method, constraint conditions and possible wind loads and vibration loads of the mirrors, doors and vehicle body during driving can be set according to actual conditions, and a finite element model can be configured to meet the requirements of vibration control.

[0041] It should be noted that the present embodiment uses a modal analysis algorithm to calculate the first-order modal frequency and vibration mode of the mirror. It can be used to determine the natural frequency and vibration mode of the structure. Through modal analysis, it is possible to identify at which frequency the mirror is prone to resonance, that is, the first-order modal frequency.

[0042] In this embodiment, after the first-order modal frequency is identified, an optimization algorithm is used to optimize the structural parameters of the mirror. The optimization algorithm here can be a genetic algorithm, a gradient descent method, or the like.

[0043] The optimization goal of this embodiment is to increase the first-order modal frequency of the mirror so that the first-order modal frequency avoids the possible excitation source frequency, thereby avoiding the jitter caused by resonance.

[0044] In an embodiment of the present invention, based on step S102, a possible embodiment is given below to illustrate its specific implementation scheme in a non-limiting manner.

[0045] like Figure 2 As shown, S1021: establish finite element models of mirrors, doors and body, and verify the accuracy of the models by comparing with experimental data. This ensures that the established finite element models of mirrors, doors and body can truly reflect the dynamic characteristics of mirrors, doors and body.

[0046] S1022: Use finite element analysis software to perform modal analysis on the mirror to obtain its first-order modal frequency and vibration shape.

[0047] S1023: Based on the modal analysis results, adjust the material properties, geometric shape, connection method, etc. of the mirror.

[0048] S1024: Use an optimization algorithm to iteratively calculate multiple design solutions to find the optimal solution.

[0049] S1025: Perform modal analysis on the optimized mirror again to verify whether its first-order modal frequency meets the frequency avoidance requirement.

[0050] If the requirements are not met, continue to adjust the design parameters and re-optimize.

[0051] In this way, based on the simulation analysis and optimization of the first-order modal control index of the mirror, after the first-order modal control index of the mirror meets the first-order modal frequency avoidance requirements of the mirror, it can avoid the influence of engine vibration, road excitation, etc., thereby reducing the vibration caused by resonance and improving the stability of the mirror. Moreover, resonance not only causes the mirror to vibrate, but also may generate noise. By avoiding resonance, the noise generated by the mirror during driving can be reduced. Thus, a stable mirror allows the driver to clearly observe the situation behind and improve driving safety.

[0052] S103: By conducting mirror vibration response tests on the preset vehicle model under actual vehicle idling conditions, acceleration, and constant speed driving conditions, and performing NVH analysis on the test results, a control method for the acceleration response amplitude of the mirror origin frequency response under actual vehicle idling conditions, acceleration, and constant speed driving conditions is formulated.

[0053] In some embodiments, an accelerometer can be used to measure the acceleration of the mirror in three directions to obtain the frequency and amplitude of the vibration. High-precision equipment such as a photoelectric measuring instrument or a laser interferometer can also be used to provide more accurate vibration data. The mirror includes: a rearview mirror, a lower view mirror, a blind spot mirror, etc., but is not limited to a rearview mirror.

[0054] Optionally, a vibration table can be used to simulate the vibration environment under different road conditions to evaluate the stability of the rearview mirror under specific operating conditions.

[0055] In this embodiment, the time domain signal may be converted into a frequency domain signal, and the main frequency component of the vibration of the rearview mirror may be identified through spectrum analysis and other methods.

[0056] A comprehensive evaluation is conducted by combining the NVH analysis algorithm with the vehicle's noise, vibration and harshness performance indicators. Targeted control measures are developed based on the mirror vibration response data obtained from actual vehicle tests and combined with the NVH analysis results.

[0057] In this embodiment, reasonable frequency response acceleration response amplitude control targets are set for different vibration characteristics under idling conditions, acceleration conditions, and constant speed driving conditions. The vibration response of the mirror is made to meet these control targets by adjusting the structural design, material selection, or installation method of the mirror.

[0058] In this way, based on the development of the control method of the acceleration response amplitude of the mirror surface origin frequency response under the actual vehicle idling conditions, acceleration, and constant speed driving conditions, the vibration amplitude of the rearview mirror of commercial vehicles under idling, acceleration, and constant speed driving conditions can be reduced, and the stability of the rearview mirror can be improved. By controlling the vibration of the mirror, it can ensure that the driver can clearly observe the situation around and behind the vehicle during driving, thereby improving driving safety.

[0059] In this embodiment, by formulating and implementing a mirror vibration control method, the NVH performance of the vehicle can be further optimized and the comfort and quality of the entire vehicle can be improved.

[0060] S104: Based on the established finite element models of the mirror, the door and the vehicle body, analyzing and determining whether the acceleration response amplitude of the mirror origin frequency response under the first-order modal control index information of the mirror is less than the acceleration response amplitude of the mirror origin frequency response under the preset mirror first-order modal control index.

[0061] If it is less than, the analysis shows that the mirror design meets the jitter requirements.

[0062] If it is greater than, the mirror is re-optimized.

[0063] In some embodiments, finite element models of mirrors, doors and vehicle bodies are established, which can reflect key information such as material properties, geometric shapes, and connection methods of each component.

[0064] In the finite element model of the mirror, door, and body, modal analysis is performed to obtain the first-order modal information of the mirror. The first-order modal information can show the vibration characteristics of the mirror at different frequencies.

[0065] Under the first-order modal control index of the finite element model of the mirror, the door and the body, the acceleration response analysis of the mirror is performed. In this embodiment, a simulated road excitation or vibration source can be applied to the model, and the acceleration response of the mirror under the excitation can be calculated.

[0066] In this embodiment, the FRF frequency response function algorithm is used to calculate the acceleration response of the mirror within a preset frequency range.

[0067] This embodiment compares the calculated acceleration response amplitude of the mirror origin frequency response with the acceleration response amplitude of the mirror origin frequency response under the preset first-order modal control index of the mirror. By comparing the results, it can be judged whether the mirror design meets the jitter requirements.

[0068] The method of this embodiment can quantitatively evaluate the rationality of the mirror design, and by comparing the acceleration response amplitude, it can be obtained that the vibration of the mirror under different working conditions, so as to determine whether it meets the use requirements.

[0069] In this embodiment, if the analysis results show that the acceleration response amplitude does not meet the preset requirements, the mirror design can be further optimized, and the structure, material or connection method of the mirror can be adjusted to reduce its vibration response amplitude, thereby improving the overall quality of the commercial vehicle and user experience.

[0070] Further, as a refinement and expansion of the specific implementation of the above embodiment, in order to fully illustrate the specific implementation process in this embodiment, the following is a specific implementation method of a commercial vehicle mirror jitter control method, which specifically includes the following steps: like Figure 3 As shown, S301: Based on the mirror matching powertrain and air compressor information, sort out the engine speed and air compressor and engine speed ratio information corresponding to the engine idle air conditioning off and air conditioning on states, and calculate the third-order engine and first-order excitation frequencies of the air compressor in the idle air conditioning off and air conditioning on states.

[0071] In some specific embodiments, the third-order excitation frequency f1 of the engine is calculated based on the following formula: f1=(n / 60)*p; Wherein, n is the engine idle speed with air conditioning on / off (r / min), and p is the number of engine cylinders.

[0072] The first-order excitation frequency f2 of the air compressor can be obtained from the following formula: f2=(n / 60)*i; Wherein, n is the engine idle speed with air conditioning off / on (r / min), and i is the ratio of air compressor speed to engine speed.

[0073] S302: Match the tire size information of the vehicle based on the mirror, and sort out the tire width, aspect ratio and rim diameter size.

[0074] The tire rolling radius is calculated, and the first-order and second-order excitation frequencies of the tire are calculated by combining the vehicle speed information and tire rolling radius matched by the mirror.

[0075] The tire order excitation f3 of this embodiment is calculated by the following formula: f3=C*(V / (πD)); Where C is the tire order -1 or 2, V is the maximum vehicle speed (m / s), and D is the tire diameter (m).

[0076] The tire diameter D is calculated by the following formula: D=D1*2.54 / 2*0.01+H*j*0.001; Where D1 is the rim diameter (inches), H is the tire width (mm), and j is the aspect ratio.

[0077] S303: Formulate the frequency avoidance rules for the first-order mode of the sight glass and carry out the simulation optimization of the first-order mode of the sight glass.

[0078] This embodiment formulates the first-order modal frequency avoidance requirements of the mirror according to the engine, air compressor, and tire excitation frequencies calculated in the first step.

[0079] Among them, the frequency avoidance requirement of the first-order mode of the sight mirror is: the first-order mode of the sight mirror ≥ excitation frequency + 2Hz.

[0080] The mirror mode of this embodiment is an inherent property of the mirror, which can be expressed as the vibration form of the mirror at this frequency and has nothing to do with excitation.

[0081] The target requirement of the first-order mode of the mirror in this embodiment is ≥ excitation frequency + 2 Hz, which is to avoid the first-order mode of the mirror and the excitation frequency, thereby avoiding the amplification of the mirror response when the first-order mode of the mirror resonates with the excitation.

[0082] S304: Establish finite element models of the mirror, door and body, perform first-order modal simulation analysis and optimization of the mirror, so that the first-order mode of the mirror meets the first-order modal frequency avoidance requirement of the mirror.

[0083] In some specific embodiments, the first-order modal optimization directions of the mirror include: mirror support, mirror arm reinforcement structure, use of high elastic modulus materials, etc.

[0084] Specifically, based on the geometric data of the mirror, door, and body, finite element meshing, model component connections, material parameters, and attributes can be performed to perform modal analysis and evaluate the results. If the first-order modal frequency avoidance requirements of the mirror are met, the simulation is completed. If the first-order modal frequency avoidance requirements of the mirror are not met, modal optimization is performed on the mirror support, mirror arm reinforcement structure, and high elastic modulus materials.

[0085] The specific optimization is: optimizing the connection stiffness between the mirror body and the mirror arm, such as adding buckles or reinforcing plates, etc., to improve the local stiffness of the mirror body.

[0086] In this embodiment, the mirror support and the mirror arm structure can also be strengthened by ribs or high elastic modulus materials to increase the stiffness of the mirror arm so that the first-order mode of the mirror meets the first-order mode frequency avoidance requirement of the mirror.

[0087] S305: Define the control principle of the mirror origin frequency response acceleration response under all working conditions, and perform simulation analysis and optimization on the mirror origin frequency response acceleration response.

[0088] In some specific embodiments, the view mirror must meet the requirements of no jitter in idling conditions, acceleration / constant speed driving conditions, etc. Here, the view mirror can be subjected to a mirror vibration response test under actual vehicle idling conditions, acceleration conditions, and constant speed driving conditions, and the test results can be subjected to NVH analysis to obtain the test results.

[0089] In this embodiment, optionally, the acceleration response amplitude of the mirror surface origin frequency response is ≤ the acceleration response amplitude of the mirror surface origin frequency response of the preset mirror at the first-order and second-order modal frequencies of the mirror.

[0090] In some embodiments, Figure 4 As shown, a finite element model of the mirror, door and body can be established, a local coordinate system and mirror excitation and response points can be established in the normal direction of the mirror, and an origin frequency response acceleration response analysis can be performed.

[0091] It should be noted that a 1N unit force in the XYZ direction is applied to the normal direction of the mirror to perform a frequency sweep analysis to obtain the response of the response point. The acceleration response at the first-order and second-order modal frequencies of the mirror is detected and compared with the acceleration response amplitude of the mirror origin frequency response under the preset mirror first-order modal control index.

[0092] If the acceleration response amplitude of the mirror origin frequency response under the first-order modal control index information of the mirror is greater than the acceleration response amplitude of the mirror origin frequency response under the preset mirror first-order modal control index of the mirror, the mirror is optimized, and the optimization directions include: the stiffness of the mirror body, the mirror body, and the door installation point stiffness.

[0093] If the acceleration response amplitude of the mirror origin frequency response under the first-order modal control index information of the mirror is less than the acceleration response amplitude of the mirror origin frequency response under the first-order modal control index of the preset mirror, the analysis shows that the mirror design meets the jitter requirements.

[0094] Furthermore, this embodiment can carry out mirror modal analysis, mirror surface origin frequency response acceleration response analysis and optimization control based on the commercial vehicle mirror jitter control method, perform optimization iteration and improvement, and avoid the mirror jitter problem under various working conditions, thereby saving development costs and shortening project cycles.

[0095] The following is an embodiment of a commercial vehicle mirror jitter control device provided by an embodiment of the present disclosure. The device and the commercial vehicle mirror jitter control method of the above-mentioned embodiments belong to the same inventive concept. For details not fully described in the embodiment of the commercial vehicle mirror jitter control device, reference can be made to the embodiment of the above-mentioned commercial vehicle mirror jitter control method.

[0096] like Figure 5 As shown, the device comprises: The information definition module is used to define the vehicle component status information matching the mirror and formulate the first-order modal control index of the mirror.

[0097] The simulation analysis module is used to establish finite element models of mirrors, doors and body, and to simulate and analyze and optimize the first-order modal control indicators of the mirrors so that the first-order modal control indicators of the mirrors meet the frequency avoidance rules.

[0098] The test analysis module is used to test the mirror vibration response of the preset vehicle model under actual vehicle idling conditions, acceleration, and constant speed driving conditions, and to perform NVH analysis on the test results, so as to formulate the control method for the acceleration response amplitude of the mirror origin frequency response under actual vehicle idling conditions, acceleration, and constant speed driving conditions.

[0099] The response analysis module is used to analyze and determine whether the acceleration response amplitude of the mirror origin frequency response under the first-order modal control index information of the mirror is less than the acceleration response amplitude of the mirror origin frequency response under the preset mirror first-order modal control index based on the established finite element model of the mirror, door and body.

[0100] If it is less than, the analysis shows that the mirror design meets the jitter requirements.

[0101] The state of this embodiment can quantitatively evaluate the rationality of the mirror design, and by comparing the acceleration response amplitude, the vibration condition of the mirror under different working conditions can be learned, thereby judging whether it meets the use requirements.

[0102] In the commercial vehicle mirror vibration control device provided in this embodiment, engine excitation, air compressor excitation, tire first-order and second-order excitation are defined; by optimizing the mirror structure, the first-order modes of various mirrors are controlled to meet the requirements of avoiding the excitation frequency of the excitation source. This embodiment conducts mirror vibration response tests on the basic vehicle mirror under actual vehicle idle conditions, acceleration conditions, and uniform speed driving conditions, performs NVH analysis on the test results, and formulates the control principle of the mirror mirror origin frequency response acceleration response under various conditions; by optimizing the mirror body structure and the vehicle body or door structure, the acceleration response of the mirror mirror origin frequency response is reduced, so as to achieve no vibration problems under all working conditions of various mirrors and improve the safety of driving vehicles.

[0103] Combined with the above commercial vehicle mirror jitter control method, Figure 6 A schematic diagram of the hardware structure of an electronic device for implementing various embodiments of the present invention.

[0104] The electronic device 500 includes, but is not limited to, components such as a processor 501, a network module 502, an audio output unit 503, an input unit 504, a display unit 506, a user input unit 507, an interface unit 508, and a memory 509. Those skilled in the art will appreciate that the electronic device structure involved in the embodiments of the present invention does not constitute a limitation on the electronic device, and the electronic device may include more or fewer components than shown in the figure, or combine certain components, or arrange the components differently.

[0105] In embodiments of the present invention, electronic devices include, but are not limited to, laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. Electronic devices may also represent various forms of mobile devices, such as personal digital processing and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely examples and are not intended to limit the implementation of the embodiments of the present application described and / or required herein.

[0106] In the embodiment of the present application, the processor 501 can be implemented by using at least one of an application-specific integrated circuit (ASIC), a programmable logic device (PLD), a processor, a controller, a microcontroller, a microprocessor, and an electronic unit designed to perform the functions described herein. In some cases, such an implementation can be implemented in a controller. For software implementation, implementations such as processes or functions can be implemented with separate software modules that allow execution of at least one function or operation. The software code can be implemented by a software application (or program) written in any appropriate programming language, and the software code can be stored in a memory and executed by a controller.

[0107] The processor 501 provides the user with wireless Internet access through the network module 502, realizing the transmission and communication of data information in this application. The audio output unit 503 includes a speaker, a buzzer, and a receiver. The input unit 504 is used to receive audio or video signals. The display unit 506 includes a display panel, which can be configured in the form of a liquid crystal display (LCD), an organic light-emitting diode (OLED), etc.

[0108] The user input unit 507 may include, but is not limited to, a physical keyboard, function keys (such as a volume control key, a switch key, etc.), a trackball, a mouse, and a joystick, which will not be described in detail here.

[0109] The memory 509 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one disk storage device, a flash memory device, or other volatile solid-state storage devices.

[0110] In addition, the electronic device 500 includes some functional modules not shown, which will not be described in detail here.

[0111] This embodiment of Figures 1 to 5 The flowcharts and block diagrams in the accompanying drawings illustrate the possible architecture, functions and operations of the devices, methods and computer program products according to various embodiments of the present disclosure. In this regard, each box in the flowchart or block diagram can represent a module, a program segment, or a part of a code, and the module, program segment, or a part of the code contains one or more executable instructions for implementing the specified logical functions. It should also be noted that in some alternative implementations, the functions marked in the boxes can also occur in an order different from that marked in the accompanying drawings. Exemplarily, two 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.

[0112] In the commercial vehicle mirror jitter control method embodiment provided in the present application, the disclosed system, device and method can be implemented in other ways. For example, the device embodiment described above is only schematic. For example, the division of the unit is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the described features, structures or characteristics can be combined in one or more embodiments in any suitable manner. In the following description, many specific details are provided to give a full understanding of the embodiments of the present invention. However, those skilled in the art will appreciate that the technical solution of the present invention can be practiced without one or more of the specific details, or other methods, components, devices, steps, etc. can be adopted. In other cases, well-known methods, devices, implementations or operations are not shown or described in detail to avoid blurring various aspects of the present invention.

[0113] This embodiment also provides a storage medium, which stores the following method steps: Define the vehicle component status information that matches the mirror and formulate the first-order modal control index of the mirror; Establish finite element models of mirrors, doors and car bodies, and simulate and analyze and optimize the first-order modal control indicators of mirrors to ensure that the first-order modal control indicators of mirrors meet the first-order modal frequency avoidance requirements of mirrors; By testing the mirror vibration response of the preset vehicle model under real vehicle idling, acceleration, and constant speed driving conditions, and conducting NVH analysis on the test results, a control method for the acceleration response amplitude of the mirror origin frequency response under real vehicle idling, acceleration, and constant speed driving conditions is formulated; Based on the established finite element models of the mirror, door and body, it is analyzed and judged whether the frequency response acceleration response amplitude of the mirror origin under the first-order modal control index information of the mirror is less than the preset frequency response acceleration response amplitude of the mirror origin under the first-order modal control index of the mirror; if it is less than, the analysis shows that the mirror design meets the jitter requirements.

[0114] In some possible implementations, various aspects of the present disclosure may also be implemented in the form of a program product, which includes program code. When the program product is run on a terminal device, the program code is used to enable the terminal device to execute the steps of various exemplary implementations of the present disclosure described in the above “Exemplary Method” section of this specification.

[0115] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A commercial vehicle mirror vibration control method, characterized in that the method include: S101: defining vehicle component status information matching the mirror and formulating the first-order modal control index of the mirror; S102: establishing finite element models of the mirror, the door and the vehicle body, and performing simulation analysis and optimization on the first-order modal control index of the mirror, so that the first-order modal control index of the mirror meets the first-order modal frequency avoidance requirement of the mirror; S103: by conducting a mirror vibration response test under real vehicle idling conditions, acceleration, and constant speed driving conditions on the mirror of a preset vehicle model, and performing NVH analysis on the test results, a control method for the acceleration response amplitude of the mirror origin frequency response under real vehicle idling conditions, acceleration, and constant speed driving conditions is formulated; S104: Based on the established finite element models of the mirror, the door and the vehicle body, analyzing and determining whether the acceleration response amplitude of the mirror origin frequency response under the first-order modal control index information of the mirror is less than the acceleration response amplitude of the mirror origin frequency response under the first-order modal control index of the mirror; If it is less than, the analysis shows that the mirror design meets the jitter requirements.

2. The commercial vehicle mirror vibration control method according to claim 1, characterized in that: Step S101 also includes: defining vehicle component status information matching the mirror including: engine information, air compressor information, engine idle air conditioning off, air conditioning on state corresponding engine speed information, air compressor and engine speed ratio information.

3. The commercial vehicle mirror vibration control method according to claim 2, characterized in that: In the method, the third-order excitation frequency of the engine and the first-order excitation frequency of the air compressor corresponding to the idle air conditioning off and air conditioning on states are calculated based on the vehicle component status information; The third-order excitation frequency f1 of the engine is calculated by the following formula: f1=(n / 60)*p; Where n is the engine idle speed with the air conditioner on / off, and p is the number of engine cylinders; The first-order excitation frequency f2 of the air compressor is calculated by the following formula: f2=(n / 60)*i; Wherein, n is the engine idle speed with the air conditioner off / on, and i is the ratio of the air compressor speed to the engine speed.

4. The commercial vehicle mirror vibration control method according to claim 1 or 2, characterized in that: Step S101 also includes: mirror matching tire information of the vehicle model; Tire information includes: tire width, aspect ratio and rim diameter, and calculates the tire rolling radius; Calculate the first-order and second-order excitation frequencies of the tire based on the vehicle speed range information and tire rolling radius of the mirror-matched vehicle model; The tire order excitation f3 is calculated by the following formula: f3=C*(V / (πD)); Where C is the tire order, which can be -1 or 2, V is the maximum speed of the vehicle, and D is the tire diameter; The tire diameter D is calculated using the following formula: D=D1*2.54 / 2*0.01+H*j*0.001; Where D1 is the rim diameter, H is the tire width, and j is the aspect ratio.

5. The commercial vehicle mirror vibration control method according to claim 3, characterized in that: In the method: Based on the engine information, air compressor information, and tire excitation frequency, the first-order modal frequency avoidance requirements of the mirror are defined: The relationship between the first-order modal control index of the mirror and the first-order modal frequency avoidance requirement of the mirror is: The first-order modal control index of the sight mirror is ≥ excitation frequency + 2Hz.

6. The commercial vehicle mirror vibration control method according to claim 1 or 2, characterized in that: In step S102, the simulation analysis and optimization method of the first-order modal control index of the mirror includes: The connection method between the mirror body and the mirror arm is set, and the mirror support and the mirror arm structure are reinforced with high elastic modulus materials, so that the first-order modal control index of the mirror meets the first-order modal frequency avoidance requirement of the mirror.

7. The commercial vehicle mirror vibration control method according to claim 1 or 2, characterized in that: After step S104, the following steps are also included: Based on the actual vehicle idling conditions, acceleration conditions, and constant speed driving conditions, the mirror vibration response test is carried out; Conduct NVH analysis on the test results; Obtain the first-order modal control index information of the mirror under each working condition; According to the established finite element models of the mirror, door and body, a local coordinate system and mirror excitation response points are established in the normal direction of the mirror to perform origin frequency response acceleration response analysis; Analyze and determine whether the acceleration response amplitude of the mirror origin frequency response under the first-order modal control index information of the mirror is less than the acceleration response amplitude of the mirror origin frequency response under the first-order modal control index of the preset mirror; If it is less than, the analysis shows that the mirror design meets the jitter requirements; If it is greater than, the mirror is re-optimized.

8. A commercial vehicle mirror vibration control device, characterized in that: The device is used to implement the commercial vehicle mirror vibration control method as described in any one of claims 1 to 7; The device includes: An information definition module is used to define the vehicle component status information that matches the mirror and formulate the first-order modal control index of the mirror; The simulation analysis module is used to establish the finite element model of the mirror, door and body, and to simulate and analyze and optimize the first-order modal control index of the mirror so that the first-order modal control index of the mirror meets the frequency avoidance rule; The test analysis module is used to test the mirror vibration response of the preset vehicle model under the conditions of idle speed, acceleration and constant speed driving, and to perform NVH analysis on the test results, so as to formulate the control method of the acceleration response amplitude of the mirror origin frequency response under the conditions of idle speed, acceleration and constant speed driving; A response analysis module is used to analyze and determine whether the acceleration response amplitude of the mirror origin frequency response under the first-order modal control index information of the mirror is less than the acceleration response amplitude of the mirror origin frequency response under the first-order modal control index of the mirror set based on the established finite element model of the mirror, the door and the body; If it is less than, the analysis shows that the mirror design meets the jitter requirements.

9. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the program, the steps of the commercial vehicle mirror jitter control method as claimed in any one of claims 1 to 7 are implemented.

10. A storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the commercial vehicle mirror vibration control method as claimed in any one of claims 1 to 7 are implemented.

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