Vibration absorption evaluation method, device and equipment of vehicle suspension system and medium

Abstract

The invention discloses a vibration absorption evaluation method, device and equipment for a vehicle suspension system and a medium, and the method comprises the steps: obtaining a first vibration value detected at a second position point when a first position point in the suspension system vibrates before the suspension system is provided with a dynamic vibration absorber, determining a first transmission curve according to the first vibration value, and determining a second transmission curve according to the first transmission curve; after the dynamic vibration absorber is installed on the suspension system, a second vibration value detected at the second position point when the first position point vibrates is obtained, a second transmission curve is determined according to the second vibration value, the vibration absorption effect of the suspension system is evaluated according to the first transmission curve and the second transmission curve, and an evaluation result is obtained. The design of the dynamic vibration absorber is guided according to the transfer curve between the first position point and the second position point of the suspension system, and the matching property of the action frequency band of the dynamic vibration absorber and the problem frequency band in the vehicle is improved, so that the determination accuracy of the central frequency band of the dynamic vibration absorber is improved, and the vibration absorption effect of the suspension system is effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of dynamic vibration absorbers, and in particular to a vibration absorption evaluation method, device, equipment and medium for a vehicle suspension system. Background Art

[0002] During the vehicle development process, the suspension system is a key component connecting the powertrain system and the body system. While carrying the powertrain system, it will also serve as the main structural transmission path to transmit the vibration and noise of the powertrain system to the vehicle. In order to balance the requirements of various vehicle performances, the design of the suspension system structure will selectively sacrifice the vibration isolation effect of some frequencies. During the vehicle performance tuning stage, the dynamic vibration absorber has a good vibration reduction effect on the vibration within the set center frequency band. Therefore, the method of installing a dynamic vibration absorber on the suspension system can make up for the deficiencies in the suspension system development process.

[0003] In order to accurately match the central frequency band of the dynamic vibration absorber and the problem frequency band in the vehicle, in the prior art, the method for determining the central frequency band of the dynamic vibration absorber is mainly to determine the origin frequency response curve through simulation analysis or experimental methods. However, in actual applications, the simulation method is limited by the simulation accuracy and often has deviations. The origin frequency response curve is not strictly consistent with the transfer function curve generated on the suspension system path. Therefore, it is often impossible to accurately give the best central frequency band of the dynamic vibration absorber, which affects the design of the dynamic vibration absorber and cannot effectively improve the vibration absorption effect of the suspension system.

[0004] Therefore, how to improve the accuracy of determining the center frequency band of the dynamic vibration absorber, thereby improving the vibration absorption effect of the vehicle suspension system has become an urgent problem to be solved. Summary of the invention

[0005] Based on this, a vibration absorption evaluation method, device, equipment and medium for a vehicle suspension system are provided to solve the problem of how to improve the accuracy of determining the center frequency band of a dynamic vibration absorber, thereby improving the vibration absorption effect of the vehicle suspension system.

[0006] In a first aspect, an embodiment of the present invention provides a vibration absorption evaluation method for a vehicle suspension system, the vibration absorption evaluation method comprising the following steps:

[0007] Before the dynamic vibration absorber is installed on the suspension system, a first vibration value detected at a second position point when the first position point in the suspension system is vibrated is obtained, and a first transfer curve is determined according to the first vibration value;

[0008] After the dynamic vibration absorber is installed in the suspension system, obtaining a second vibration value detected at the second position point when the first position point is vibrated, and determining a second transfer curve according to the second vibration value;

[0009] The vibration absorption effect of the suspension system is evaluated according to the first transfer curve and the second transfer curve to obtain an evaluation result.

[0010] In a second aspect, an embodiment of the present invention provides a vibration absorption evaluation device for a vehicle suspension system, the vibration absorption evaluation device comprising:

[0011] A first experimental module is used for obtaining, before the dynamic vibration absorber is installed on the suspension system, a first vibration value detected at a second position point when the first position point in the suspension system is vibrated, and determining a first transfer curve according to the first vibration value;

[0012] A second experimental module is used to obtain, after the dynamic vibration absorber is installed on the suspension system, a second vibration value detected at the second position point when the first position point is vibrated, and determine a second transfer curve according to the second vibration value;

[0013] The first evaluation module is used to evaluate the vibration absorption effect of the suspension system according to the first transfer curve and the second transfer curve to obtain an evaluation result.

[0014] In a third aspect, an embodiment of the present invention provides a computer device, comprising 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 above-mentioned vehicle suspension system vibration absorption evaluation method when executing the computer program.

[0015] In a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the above-mentioned vehicle suspension system vibration absorption evaluation method are implemented.

[0016] The beneficial effects of the embodiments of the present invention compared with the prior art are as follows: before the dynamic vibration absorber is installed in the suspension system, the present invention obtains a first vibration value detected at a second position point when the first position point in the suspension system is vibrated, and determines a first transfer curve based on the first vibration value; after the dynamic vibration absorber is installed in the suspension system, the second vibration value detected at the second position point when the first position point is vibrated is obtained, and determines a second transfer curve based on the second vibration value; based on the first transfer curve and the second transfer curve, the vibration absorption effect of the suspension system is evaluated to obtain an evaluation result. Among them, when the first position point in the suspension system vibrates, the vibration value of the second position point is detected, and the transfer curve is determined according to the vibration value of the second position point, that is, the transfer curve between the two points of the suspension system is used to guide the design of the dynamic vibration absorber, thereby improving the matching of the action frequency band of the dynamic vibration absorber and the problem frequency band in the vehicle, thereby improving the accuracy of determining the center frequency band of the dynamic vibration absorber, effectively solving the noise, vibration and acoustic roughness (Noise, Vibration and Harshness, NVH) problems of specific frequencies transmitted to the vehicle through the suspension system, and improving the vibration absorption effect of the suspension system and the overall NVH performance of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments of the present invention 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 labor.

[0018] Figure 1 is a flow chart of a vibration absorption evaluation method for a vehicle suspension system provided in Embodiment 1 of the present invention;

[0019] Figure 2 It is a comparison schematic diagram of a transfer curve at a specific frequency provided by the first embodiment of the present invention;

[0020] Figure 3 is a flow chart of a vibration absorption evaluation method for a vehicle suspension system provided in Embodiment 2 of the present invention;

[0021] Figure 4 This is a spectrum analysis diagram of in-car sound provided by the second embodiment of the present invention;

[0022] Figure 5 is a spectrum analysis diagram of the vibration of a suspension system provided by the second embodiment of the present invention;

[0023] Figure 6 is a flow chart of a vibration absorption evaluation method for a vehicle suspension system provided in Embodiment 3 of the present invention;

[0024] Figure 7 is a flow chart of a vibration absorption evaluation method for a vehicle suspension system provided in a fourth embodiment of the present invention;

[0025] Figure 8 It is a schematic diagram of a vibration absorption effect of a suspension system after a dynamic vibration absorber is installed in the suspension system, provided by a fourth embodiment of the present invention;

[0026] Fig. 9 is a structural schematic diagram of a vibration absorption evaluation device for a vehicle suspension system provided in a fifth embodiment of the present invention;

[0027] Fig.10 It is a structural diagram of a computer device provided in Embodiment 6 of the present invention. DETAILED DESCRIPTION

[0028] 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 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.

[0029] like Figure 1 FIG. 1 is a flow chart of a vibration absorption evaluation method for a vehicle suspension system provided in Embodiment 1 of the present invention. The vibration absorption evaluation method comprises the following steps:

[0030] Step S101: before a dynamic vibration absorber is installed in a suspension system, a first vibration value detected at a second position point when a first position point in the suspension system is vibrated is obtained, and a first transfer curve is determined according to the first vibration value.

[0031] In this embodiment, the suspension system may refer to an important component connecting the powertrain system and the body system, which may include elastic elements, shock absorbers, guide mechanisms and other parts. The vibration absorption control may refer to adding an additional subsystem to the main vibration system so that the subsystem absorbs part of the energy generated by the vibration, thereby reducing the energy transferred to the main vibration system. The additional subsystem device is a dynamic vibration absorber. The first position point and the second position point may refer to two different positions in the suspension system. The first vibration value may refer to a response signal value generated by the vibration of the first position point detected at the second position point before the dynamic vibration absorber is installed in the suspension system. The first transfer curve may refer to a vibration transfer function (Vibration Transfer Function, VTF) curve representing the vibration characteristics from the first position point to the second position point before the dynamic vibration absorber is installed in the suspension system. The VTF curve may represent the vibration transfer characteristics from the first position point to the second position point when the first position point vibrates.

[0032] Specifically, the position where the vehicle suspension system is connected to the powertrain system can be selected as the first position point, and the position where the vehicle suspension system is connected to the body system can be selected as the second position point. The first position point can be vibrated by arranging a vibration excitation device such as an exciter at the first position point or by vibrating the vehicle engine itself. A three-axis sensor can be arranged at the second position point, and a first vibration value generated by the vibration of the first position point can be detected by the three-axis sensor. The first vibration value generated by the second position point is obtained, and the first transfer curve is determined by a corresponding vibration transfer function curve generation tool.

[0033] Step S102: After the dynamic vibration absorber is installed on the suspension system, a second vibration value detected at the second position point when the first position point is vibrated is obtained, and a second transfer curve is determined according to the second vibration value.

[0034] In this embodiment, the second vibration value may refer to a response signal value generated by the vibration of the first position point detected at the second position point after the dynamic vibration absorber is installed on the suspension system, and the second transfer curve may refer to a VTF curve representing the vibration characteristics from the first position point to the second position point after the dynamic vibration absorber is installed on the suspension system.

[0035] Specifically, after the dynamic vibration absorber is installed in the suspension system, the second transfer curve may be determined by referring to the content in the above step S101.

[0036] like Figure 2 As shown in FIG. 1 , it is a schematic diagram of comparing the transfer curves at a specific frequency provided by the first embodiment of the present invention. Figure 2 As shown, it is a comparison diagram of an input point inertance (IPI) curve of a first position point, an IPI curve of a third position point for vibration transfer between the first position point and the second position point, and a VTF curve of the second position point at a specific frequency. The IPI curve of the first position point reflects the local stiffness characteristics of the first position point when the first position point vibrates, the IPI curve of the third position point reflects the local stiffness characteristics of the third position point for vibration transfer when the first position point vibrates, and the VTF curve of the second position point reflects the vibration transfer characteristics from the first position point to the second position point when the first position point vibrates, as shown in FIG. Figure 2 As shown, at a specific frequency of 587.99 Hz, it can be determined that when the first position point vibrates, the VTF curve determined according to the vibration value of the second position point is closer to the engineering needs, so that the design of the dynamic vibration absorber is guided according to the VTF curve, which improves the matching of the action frequency band of the dynamic vibration absorber and the problem frequency band in the vehicle, thereby improving the accuracy of determining the center frequency band of the dynamic vibration absorber.

[0037] Step S103: Evaluate the vibration absorption effect of the suspension system according to the first transfer curve and the second transfer curve to obtain an evaluation result.

[0038] In this embodiment, the evaluation result may refer to the improvement result of the vibration absorption effect of the suspension system after the dynamic vibration absorber is installed on the suspension system, which is obtained by evaluating the first transfer curve and the second transfer curve. Specifically, the problem frequency band corresponding to the NVH problem point can be determined according to the NVH problem point in the subjective evaluation result obtained by subjectively evaluating the vehicle, and the change amount of the first transfer curve and the second transfer curve near the problem frequency band can be compared. According to the comparison result of the change amount, it is determined whether the NVH problem point in the subjective evaluation result is effectively solved after the dynamic vibration absorber is installed on the suspension system, so as to determine the improvement result of the vibration absorption effect of the suspension system after the dynamic vibration absorber is installed. The improvement effect is the evaluation result. After obtaining the evaluation result, it can be comprehensively considered based on the evaluation result and the cost of the dynamic vibration absorber to decide whether to finally install the dynamic vibration absorber on the suspension system to improve the vibration absorption effect of the suspension system.

[0039] In this embodiment, when a first position point in the suspension system vibrates, a vibration value of a second position point is detected, and a transfer curve is determined according to the vibration value of the second position point. That is, the transfer curve between two points of the suspension system is used to guide the design of the dynamic vibration absorber, thereby improving the matching of the action frequency band of the dynamic vibration absorber and the problem frequency band in the vehicle, thereby improving the accuracy of determining the center frequency band of the dynamic vibration absorber, effectively solving the NVH problem transmitted to the vehicle through the suspension system, and improving the vibration absorption effect of the suspension system and the overall NVH performance of the vehicle.

[0040] like Figure 3 FIG. 2 is a flow chart of a vibration absorption evaluation method for a vehicle suspension system provided in Embodiment 2 of the present invention. Before obtaining the first vibration value detected at the second position point when the first position point in the suspension system is vibrated in the above step S101, the following steps may be further included:

[0041] Step S301: Obtain subjective evaluation results of the vehicle, and determine the frequency band to be optimized based on the subjective evaluation results.

[0042] Step S302: If the frequency band to be optimized meets a preset first condition, a first vibration value is obtained, and a first transfer curve is determined according to the first vibration value.

[0043] In this embodiment, the subjective evaluation result may refer to the user's evaluation result of the vehicle in the actual vehicle use scenario, the frequency band to be optimized may refer to the problem frequency band corresponding to the NVH problem point in the subjective evaluation result, and the preset first condition may refer to a pre-set narrow frequency band in which the improvement effect of the dynamic vibration absorber is more obvious.

[0044] Specifically, before obtaining the first vibration value detected at the second position point when the first position point in the suspension system vibrates, the subjective evaluation results of the user on the vehicle in the actual vehicle use scenario are obtained. If there are NVH problem points in the subjective evaluation results, the frequency band to be optimized corresponding to the NVH problem points is further tested. According to the working principle of the dynamic vibration absorber, it is detected whether the frequency band to be optimized meets the preset first condition, that is, it is detected whether the frequency band to be optimized is a narrow frequency band where the improvement effect of the dynamic vibration absorber is more obvious. If the frequency band to be optimized meets the preset first condition, it means that the installation of a dynamic vibration absorber on the vehicle has an improvement effect on the NVH problem point in the subjective evaluation results, and then it is detected whether the NVH problem point is related to the suspension system. The first vibration value detected at the second position point when the first position point in the suspension system vibrates can be obtained, and the first transfer curve is determined according to the first vibration value to determine whether installing a dynamic vibration absorber on the vehicle suspension system has an improvement effect on the NVH problem point in the subjective evaluation results.

[0045] For example, Figure 4 FIG. 1 is a spectrum analysis diagram of a car sound provided by the second embodiment of the present invention. Figure 4 As shown in FIG. 1 , if the problem point determined according to the subjective evaluation result is that there is noise in the car, the sound in the car is filtered and played back, and it is determined that the frequency band to be optimized corresponding to the problem point is 575Hz~625Hz, and the energy distribution of the frequency band to be optimized 575Hz~625Hz is as follows: Figure 4 If, according to the contents of the above steps S301 and S302, it is determined that the frequency band to be optimized, 575 Hz to 625 Hz, meets the preset first condition, it can be shown that installing a dynamic vibration absorber on the vehicle has an improvement effect on the noise inside the vehicle, and it can be further determined whether the noise inside the vehicle is associated with the suspension system.

[0046] like Figure 5 The figure shows a spectrum analysis diagram of the vibration of a suspension system provided by the second embodiment of the present invention. According to the frequency band to be optimized corresponding to the noise in the car, 572Hz~625Hz, it is determined Figure 5 The rectangular box in the figure shows the energy distribution of the frequency band 572Hz to 625Hz in the suspension system. Figure 4 The energy distribution in the area shown in the middle rectangle is similar to Figure 5 By comparing the energy distribution in the area shown in the middle rectangular box, it can be determined that the energy distribution in the two rectangular boxes is relatively similar. It can be determined that the noise in the car is related to the suspension system. Then, when the first position point in the suspension system vibrates, the first vibration value detected at the second position point can be obtained. According to the first vibration value, the first transfer curve is determined to determine whether installing a dynamic vibration absorber on the suspension system has an improvement effect on the noise in the car.

[0047] In this embodiment, the preset first condition determined based on the working principle of the dynamic vibration absorber is used to detect the frequency band to be optimized corresponding to the NVH problem point in the subjective evaluation results of the user in the actual vehicle use scenario. If the frequency band to be optimized is a narrow frequency band where the improvement effect of the dynamic vibration absorber is more obvious, the first vibration value is obtained, and the first transfer curve is determined according to the first vibration value. The necessity of installing a vibration absorber on the vehicle is determined in the dimension of the whole vehicle according to the frequency band to be optimized corresponding to the NVH problem point in the subjective evaluation results and the preset first condition, which provides a basis for deciding whether to install a dynamic vibration absorber on the vehicle, and avoids the waste of resources or performance defects caused by blindly installing a dynamic vibration absorber on the vehicle.

[0048] like Figure 6 FIG. 2 is a flow chart of a vibration absorption evaluation method for a vehicle suspension system provided in Embodiment 3 of the present invention. After determining the first transfer curve according to the first vibration value in the above step S101, the following steps may also be included:

[0049] Step S601: determining a frequency band corresponding to a peak value in a first transfer curve.

[0050] Step S602: Compare the frequency band corresponding to the peak with the frequency band to be optimized to obtain a comparison result.

[0051] Step S603: If the comparison result satisfies the preset second condition, the central frequency band of the dynamic vibration absorber is adjusted according to the frequency band corresponding to the peak value and the frequency band to be optimized.

[0052] In this embodiment, the transfer curve may represent a characteristic curve of the amplification or attenuation degree of the vibration acceleration transmitted from the first position point to the second position point at a specific vibration frequency, wherein the horizontal axis may represent the frequency, and the vertical axis may represent the ratio of vibration to force at the corresponding frequency. The peak value may refer to the maximum value of the ratio of vibration to force achieved by the first transfer curve, the frequency band corresponding to the peak value may refer to the frequency band in which the vibration response corresponding to the peak value is most significant, the comparison result may refer to the overlap rate between the frequency band corresponding to the peak value and the frequency band to be optimized, the preset second condition may refer to the overlap rate value that should be achieved when the installation of a dynamic vibration absorber on the suspension system has an improvement effect on the NVH problem point in the subjective evaluation results, and the center frequency band may refer to the action frequency band of the dynamic vibration absorber, that is, the vibration in the frequency range to be reduced by the dynamic vibration absorber.

[0053] Specifically, after determining the first transfer curve, the peak value in the first transfer curve is determined, and the frequency band corresponding to the peak value is determined, and the frequency range covered by the frequency band corresponding to the peak value and the frequency range covered by the frequency band to be optimized are overlapped and compared to obtain a comparison result. If the comparison result meets the preset second condition, it means that installing a dynamic vibration absorber on the suspension system has an improvement effect on the NVH problem point in the subjective evaluation result, and the center frequency band of the dynamic vibration absorber is adjusted to the frequency band corresponding to the peak value or the frequency band to be optimized to obtain an adjusted dynamic vibration absorber, and the adjusted dynamic vibration absorber is installed on the suspension system. After the dynamic vibration absorber is installed on the suspension system, a second transfer curve is determined, and the vibration absorption effect of the suspension system is evaluated according to the first transfer curve and the second transfer curve to obtain an evaluation result, so as to further determine the specific improvement effect of installing the dynamic vibration absorber on the suspension system on the NVH problem point in the subjective evaluation result.

[0054] In this embodiment, by comparing the frequency band corresponding to the peak in the first transfer curve between the first position point and the second position point of the suspension system with the frequency band to be optimized corresponding to the NVH problem point in the subjective evaluation result, if the overlap rate of the frequency band corresponding to the peak and the frequency band to be optimized meets the preset second condition, the central frequency band of the dynamic vibration absorber is adjusted according to the frequency band corresponding to the peak and the frequency band to be optimized. According to the frequency band corresponding to the peak, the frequency band to be optimized and the preset second condition, the necessity of installing the dynamic vibration absorber in the suspension system is judged in the dimension of the suspension system, which provides a basis for deciding whether to install the dynamic vibration absorber in the suspension system, and avoids the waste of resources or performance defects caused by blindly installing the dynamic vibration absorber in the suspension system. According to the first transfer curve between the two points of the suspension system obtained by the test, the design of the central frequency band of the dynamic vibration absorber is guided, the matching of the action frequency band of the dynamic vibration absorber and the problem frequency band in the vehicle is improved, thereby improving the accuracy of determining the central frequency band of the dynamic vibration absorber, effectively solving the NVH problem in the subjective evaluation result, and improving the vibration absorption effect of the suspension system and the overall NVH performance of the vehicle.

[0055] like Figure 7 FIG. 2 is a flow chart of a vibration absorption evaluation method for a vehicle suspension system provided in a fourth embodiment of the present invention. In the above step S103, the vibration absorption effect of the suspension system is evaluated according to the first transfer curve and the second transfer curve to obtain an evaluation result, which may include the following steps:

[0056] Step S701: determining a first center curve corresponding to a center frequency band in a first transfer curve, and determining a second center curve corresponding to a center frequency band in a second transfer curve.

[0057] Step S702: Evaluate the vibration absorption effect of the suspension system according to the first center curve and the second center curve to obtain an evaluation result.

[0058] In this embodiment, the first center curve may refer to a curve corresponding to the center frequency band in the first transfer curve, and the second center curve may refer to a curve corresponding to the center frequency band in the second transfer curve.

[0059] Specifically, the curve corresponding to the center frequency band in the first transfer curve is taken as the first center curve, and the curve corresponding to the center frequency band in the second transfer curve is taken as the second center curve. The change in the ratio of the vertical coordinate vibration to the force of the first center curve and the second center curve is compared, and the evaluation result is determined according to the change. For example, if the change in the ratio of the vertical coordinate vibration to the force of the first center curve and the second center curve is larger, it is determined that the dynamic vibration absorber has a better vibration absorption effect on improving the suspension system.

[0060] For example, Figure 8 The figure shows a schematic diagram of the vibration absorption effect of the suspension system after the dynamic vibration absorber is installed in the suspension system according to the fourth embodiment of the present invention. If the problem point determined by the subjective evaluation result is that there is noise in the car, and the corresponding frequency band to be optimized is 575Hz~625Hz, then it can correspond to Figure 4 The spectrum analysis diagram of the car sound is compared and analyzed. Figure 4 As shown in Figure 2, before the dynamic vibration absorber is installed in the suspension system, the energy distribution corresponding to the frequency band to be optimized, 575Hz~625Hz, is as follows: Figure 4 The area shown in the rectangular box is Figure 8 As shown in Figure 2, after the dynamic vibration absorber is installed in the suspension system, the energy distribution corresponding to the frequency band to be optimized, 575Hz~625Hz, is as follows: Figure 8 The area shown in the rectangular box is Figure 4 The energy distribution in the area shown in the middle rectangle is similar to Figure 8 By comparing the energy distribution in the area shown in the rectangular box, it can be determined Figure 8 The energy of the area indicated by the middle rectangle is lower than Figure 4 The energy in the area shown in the middle rectangular box can determine whether installing a dynamic vibration absorber in the suspension system has an improvement effect on the noise inside the car, as well as the specific improvement situation.

[0061] In this embodiment, after the dynamic vibration absorber is installed in the suspension system, the vibration absorption effect of the suspension system is evaluated according to the first center curve and the second center curve corresponding to the center frequency band, and the vibration absorption effect of the suspension system after the dynamic vibration absorber is installed is determined, thereby improving the accuracy of the evaluation results obtained, and providing a basis for the improvement effect of the dynamic vibration absorber for subsequent comprehensive decision-making on whether to install the dynamic vibration absorber in the suspension system in combination with the cost of the dynamic vibration absorber.

[0062] like Fig. 9As shown, a vibration absorption evaluation device for a vehicle suspension system provided in Embodiment 5 of the present invention corresponds to the vibration absorption evaluation method for a vehicle suspension system in the above-mentioned embodiment. The vibration absorption evaluation device for a vehicle suspension system includes a first experimental module 91, a second experimental module 92 and a first evaluation module 93. The functional modules are described in detail as follows:

[0063] A first experimental module 91 is used for obtaining, before the dynamic vibration absorber is installed in the suspension system, a first vibration value detected at a second position point when the first position point in the suspension system is vibrated, and determining a first transfer curve according to the first vibration value;

[0064] A second experimental module 92 is used to obtain a second vibration value detected at the second position point when the first position point is vibrated after the dynamic vibration absorber is installed on the suspension system, and determine a second transfer curve according to the second vibration value;

[0065] The first evaluation module 93 is used to evaluate the vibration absorption effect of the suspension system according to the first transfer curve and the second transfer curve to obtain an evaluation result.

[0066] Optionally, the vibration absorption evaluation device further comprises:

[0067] An acquisition module, used to acquire a subjective evaluation result of the vehicle, and determine a frequency band to be optimized according to the subjective evaluation result;

[0068] The second evaluation module is used to obtain the first vibration value if the frequency band to be optimized meets the preset first condition, and determine the first transfer curve according to the first vibration value. Optionally, the vibration absorption evaluation device also includes:

[0069] A first determining module, configured to determine a frequency band corresponding to a peak value in the first transfer curve;

[0070] A comparison module, used for comparing the frequency band corresponding to the peak value with the frequency band to be optimized to obtain a comparison result;

[0071] The third evaluation module is used to adjust the evaluation result of the central frequency band of the dynamic vibration absorber according to the frequency band corresponding to the peak value and the frequency band to be optimized if the comparison result meets the preset second condition.

[0072] Optionally, the first evaluation module 93 includes:

[0073] A second determination module, configured to determine a first center curve corresponding to the center frequency band in the first transfer curve, and to determine a second center curve corresponding to the center frequency band in the second transfer curve;

[0074] The fourth evaluation module is used to evaluate the vibration absorption effect of the suspension system according to the first center curve and the second center curve to obtain the evaluation result.

[0075] Optionally, the vibration absorption evaluation device further comprises:

[0076] The excitation module is used to arrange a vibration excitation device at the first position point and vibrate the first position point using the vibration excitation device.

[0077] Optionally, the vibration absorption evaluation device further comprises:

[0078] The response module is configured to detect the first vibration value and the second vibration value by arranging a three-axis sensor at the second position point and using the three-axis sensor.

[0079] Optionally, the vibration absorption evaluation device further comprises:

[0080] A decision module is used to decide whether to install the dynamic vibration absorber on the suspension system according to the evaluation result and a preset cost condition.

[0081] The specific definition of the vibration absorption evaluation device for the vehicle suspension system can be found in the definition of the vibration absorption evaluation method for the vehicle suspension system mentioned above, which will not be repeated here. Each module in the above-mentioned vibration absorption evaluation device for the vehicle suspension system can be implemented in whole or in part by software, hardware, and a combination thereof. The above-mentioned modules can be embedded in or independent of the processor in the computer device in the form of hardware, or can be stored in the memory of the computer device in the form of software, so that the processor can call and execute the operations corresponding to the above modules.

[0082] Fig.10 This is a schematic diagram of the structure of a computer device provided in Embodiment 6 of the present invention. Fig.10 As shown, the computer device of this embodiment includes: at least one processor ( Fig.10 Only one is shown in the figure), a memory, and a computer program stored in the memory and executable on at least one processor, wherein when the processor executes the computer program, the steps in any of the above-mentioned embodiments of the method for evaluating the vibration absorption of a vehicle suspension system are implemented.

[0083] The computer device may include, but is not limited to, a processor and a memory. Those skilled in the art will appreciate that Fig.10 This is merely an example of a computer device and does not constitute a limitation on the computer device. The computer device may include more or fewer components than those shown in the figure, or a combination of certain components, or different components. For example, it may also include a network interface, a display screen, and an input device.

[0084] The processor may be a CPU, or other general-purpose processors, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor, etc.

[0085] The memory includes a readable storage medium, an internal memory, etc., wherein the internal memory may be the memory of a computer device, and the internal memory provides an environment for the operation of an operating system and computer-readable instructions in the readable storage medium. The readable storage medium may be a hard disk of a computer device, and in other embodiments may also be an external storage device of a computer device, for example, a plug-in hard disk, a smart memory card (Smart Media Card, SMC), a secure digital (Secure Digital, SD) card, a flash card (Flash Card), etc. equipped on a computer device. Further, the memory may also include both an internal storage unit of a computer device and an external storage device. The memory is used to store an operating system, an application program, a boot loader (BootLoader), data, and other programs, such as program codes of computer programs, etc. The memory may also be used to temporarily store data that has been output or is to be output.

[0086] The technicians in the relevant field can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional units and modules is used as an example. In practical applications, the above-mentioned function allocation can be completed by different functional units and modules as needed, that is, the internal structure of the device is divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiment can be integrated into a processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of software functional units. In addition, the specific names of the functional units and modules are only for the convenience of distinguishing each other, and are not used to limit the scope of protection of the present invention. The specific working process of the units and modules in the above-mentioned device can refer to the corresponding process in the above-mentioned method embodiment, which will not be repeated here. If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on such understanding, the present invention implements all or part of the processes in the above-mentioned embodiment method, which can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a computer-readable storage medium. When the computer program is executed by the processor, the steps of the above-mentioned method embodiment can be implemented. Among them, the computer program includes computer program code, and the computer program code can be in source code form, object code form, executable file or some intermediate form. The computer-readable medium may at least include: any entity or device capable of carrying computer program code, recording medium, computer memory, read-only memory (ROM), random access memory (RAM), electric carrier signal, telecommunication signal and software distribution medium. For example, a USB flash drive, a mobile hard disk, a magnetic disk or an optical disk. In some jurisdictions, according to legislation and patent practice, computer-readable media cannot be electric carrier signals and telecommunication signals.

[0087] The present invention implements all or part of the processes in the above-mentioned embodiment method, and can also be completed by a computer program product. When the computer program product runs on a computer device, the computer device can implement the steps in the above-mentioned method embodiment when executing.

[0088] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0089] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present invention.

[0090] In the embodiments provided by the present invention, it should be understood that the disclosed devices / computer equipment and methods can be implemented in other ways. For example, the device / computer equipment embodiments described above are only schematic, for example, the division of modules or units is only a logical function division, and 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. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0091] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0092] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention, and should be included in the protection scope of the present invention.

Claims

1. A vibration absorption evaluation method for a vehicle suspension system, It is characterized in that The vibration absorption evaluation method comprises the following steps: Before the dynamic vibration absorber is installed on the suspension system, a first vibration value detected at a second position point when the first position point in the suspension system is vibrated is obtained, and a first transfer curve is determined according to the first vibration value; After the dynamic vibration absorber is installed in the suspension system, obtaining a second vibration value detected at the second position point when the first position point is vibrated, and determining a second transfer curve according to the second vibration value; The vibration absorption effect of the suspension system is evaluated according to the first transfer curve and the second transfer curve to obtain an evaluation result.

2. The vibration absorption evaluation method of a vehicle suspension system according to claim 1, It is characterized in that Before obtaining the first vibration value detected at the second position point when the first position point in the suspension system is vibrated, the method further includes: Obtaining a subjective evaluation result of the vehicle, and determining a frequency band to be optimized according to the subjective evaluation result; If the frequency band to be optimized meets a preset first condition, the first vibration value is obtained, and the first transfer curve is determined according to the first vibration value.

3. The vibration absorption evaluation method of a vehicle suspension system according to claim 2, It is characterized in that After determining the first transfer curve according to the first vibration value, the method further includes: determining a frequency band corresponding to a peak in the first transfer curve; Comparing the frequency band corresponding to the peak with the frequency band to be optimized to obtain a comparison result; If the comparison result satisfies a preset second condition, the central frequency band of the dynamic vibration absorber is adjusted according to the frequency band corresponding to the peak value and the frequency band to be optimized.

4. The vibration absorption evaluation method of a vehicle suspension system according to claim 3, It is characterized in that The step of evaluating the vibration absorption effect of the suspension system according to the first transfer curve and the second transfer curve to obtain an evaluation result includes: Determine a first center curve corresponding to the center frequency band in the first transfer curve, and determine a second center curve corresponding to the center frequency band in the second transfer curve; The vibration absorption effect of the suspension system is evaluated according to the first center curve and the second center curve to obtain the evaluation result.

5. The vibration absorption evaluation method of a vehicle suspension system according to claim 1, It is characterized in that The vibration absorption evaluation method further comprises: By arranging a vibration excitation device at the first location point, the first location point is vibrated by using the vibration excitation device.

6. The vibration absorption evaluation method of a vehicle suspension system according to claim 1, It is characterized in that The vibration absorption evaluation method further comprises: By arranging a three-axis sensor at the second position point, the first vibration value and the second vibration value are detected by using the three-axis sensor.

7. The vibration absorption evaluation method of a vehicle suspension system according to claim 1, It is characterized in that After obtaining the evaluation results, the method further includes: A decision is made as to whether to install the dynamic vibration absorber on the suspension system based on the evaluation result and a preset cost condition.

8. A vibration absorption evaluation device for a vehicle suspension system, It is characterized in that The vibration absorption evaluation device comprises: A first experimental module is used for obtaining, before the dynamic vibration absorber is installed on the suspension system, a first vibration value detected at a second position point when the first position point in the suspension system is vibrated, and determining a first transfer curve according to the first vibration value; A second experimental module is used to obtain, after the dynamic vibration absorber is installed on the suspension system, a second vibration value detected at the second position point when the first position point is vibrated, and determine a second transfer curve according to the second vibration value; The first evaluation module is used to evaluate the vibration absorption effect of the suspension system according to the first transfer curve and the second transfer curve to obtain an evaluation result.

9. A computer device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, It is characterized in that When the processor executes the computer program, the steps of the vibration absorption evaluation method for a vehicle suspension system according to any one of claims 1 to 7 are implemented.

10. A computer-readable storage medium storing a computer program. It is characterized in that When the computer program is executed by a processor, the steps of the vibration absorption evaluation method for a vehicle suspension system according to any one of claims 1 to 7 are implemented.

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