Brake pedal vibration control method, device, equipment and storage medium

Abstract

The present application relates to the field of vehicle control technology, and discloses a brake pedal vibration control method, device, equipment and storage medium, the method comprising: determining a design frequency range of the brake pedal based on a vehicle-related system; determining a brake pedal target frequency according to the design frequency range of the brake pedal; and controlling the operating speed of an excitation source according to the brake pedal target frequency to achieve brake pedal vibration control. The present application can effectively avoid vibration of the brake pedal during use.

Description

Technical Field

[0001] The present application relates to the field of vehicle control technology, and in particular to a brake pedal vibration control method, device, equipment and storage medium. Background Art

[0002] Since new energy vehicles require an extremely high level of intelligent driving, the braking system uses a highly integrated onebox system. If the inherent mode of the brake pedal is designed to fall near the vehicle-related modal group, the inherent frequency of the brake pedal will easily couple with the vehicle-related system mode, resulting in obvious pedal vibration, which will cause users to clearly perceive the braking vibration and thus affect the user experience.

[0003] Therefore, how to effectively avoid the vibration of the brake pedal during use is a problem that urgently needs to be solved.

[0004] The above contents are only used to assist in understanding the technical solution of the present application and do not constitute an admission that the above contents are prior art. Summary of the invention

[0005] The main purpose of this application is to provide a brake pedal vibration control method, device, equipment and storage medium, aiming to solve the technical problem of how to effectively avoid vibration during the use of the brake pedal.

[0006] To achieve the above objectives, the present application proposes a brake pedal vibration control method, the method comprising:

[0007] Determine the design frequency range of the brake pedal based on the vehicle-related system;

[0008] determining a brake pedal target frequency according to a design frequency range of the brake pedal;

[0009] The operating speed of the excitation source is controlled according to the brake pedal target frequency to achieve vibration control of the brake pedal.

[0010] In one embodiment, determining the design frequency range of the brake pedal based on the vehicle-related system includes:

[0011] Obtain the whole vehicle related system and the natural frequency corresponding to the whole vehicle related system;

[0012] Determine the natural frequency of the frequency-avoiding associated system according to the whole vehicle associated system and the natural frequency corresponding to the whole vehicle associated system;

[0013] The design frequency range of the brake pedal is determined according to the natural frequency of the frequency-avoiding associated system and the first preset frequency-avoiding frequency.

[0014] In one embodiment, determining the natural frequency of the frequency-avoiding associated system according to the whole vehicle associated system and the natural frequency corresponding to the whole vehicle associated system includes:

[0015] Acquire a pedal braking interval, and determine a frequency-avoidance associated system in the vehicle associated system based on the pedal braking interval;

[0016] The natural frequency of the frequency-avoiding associated system is determined based on the natural frequency corresponding to the whole vehicle associated system.

[0017] In one embodiment, determining the brake pedal target frequency according to the design frequency range of the brake pedal includes:

[0018] adjusting the mass of the brake pedal to obtain a reference frequency of the brake pedal;

[0019] Determining whether the reference frequency is within the design frequency range;

[0020] When the reference frequency is within the design frequency range, using the reference frequency as a brake pedal target frequency;

[0021] When the reference frequency is not within the design frequency range, the step of adjusting the mass of the brake pedal to obtain the reference frequency of the brake pedal is performed.

[0022] In one embodiment, controlling the operating speed of the excitation source according to the brake pedal target frequency includes:

[0023] determining a rotation speed range of the excitation source according to the brake pedal target frequency;

[0024] The operating speed of the excitation source is controlled according to the speed range of the excitation source.

[0025] In one embodiment, determining the rotation speed range of the excitation source according to the brake pedal target frequency includes:

[0026] Determining an excitation frequency range of an excitation source according to the brake pedal target frequency and a second preset frequency avoidance frequency;

[0027] The rotation speed range of the excitation source is determined based on the excitation frequency range of the excitation source.

[0028] In one embodiment, the vehicle-related system at least includes a front firewall of the body-in-white, a longitudinal beam of the body-in-white, a shock tower of the body-in-white, a dashboard cross beam of the body-in-white, an air conditioning box, a front subframe, and a steering gear;

[0029] The excitation source includes at least an air-conditioning blower, an air-conditioning compressor, an engine, a cooling fan and an air suspension air pump.

[0030] In addition, to achieve the above-mentioned purpose, the present application also proposes a brake pedal vibration control device, the brake pedal vibration control device comprising:

[0031] A determination module, used to determine a design frequency range of a brake pedal based on a vehicle-related system;

[0032] The determination module is further used to determine a brake pedal target frequency according to a design frequency range of the brake pedal;

[0033] The control module is used to control the running speed of the excitation source according to the target frequency of the brake pedal to achieve vibration control of the brake pedal.

[0034] In addition, to achieve the above-mentioned purpose, the present application also proposes a brake pedal vibration control device, which includes: a memory, a processor, and a computer program stored in the memory and executable on the processor, and the computer program is configured to implement the steps of the brake pedal vibration control method described above.

[0035] In addition, to achieve the above-mentioned purpose, the present application also proposes a storage medium, which is a computer-readable storage medium, and a computer program is stored on the storage medium. When the computer program is executed by a processor, the steps of the brake pedal vibration control method described above are implemented.

[0036] In addition, to achieve the above-mentioned purpose, the present application also provides a computer program product, which includes a computer program, and when the computer program is executed by a processor, the steps of the brake pedal vibration control method described above are implemented.

[0037] The present application provides a brake pedal vibration control method. The present application first determines a design frequency range of the brake pedal based on a vehicle-related system, thereby preventing the associated system from modally coupling with the brake pedal and causing brake pedal resonance; determines a brake pedal target frequency according to the design frequency range of the brake pedal to improve the accuracy of brake pedal design; controls the operating speed of an excitation source according to the brake pedal target frequency to achieve brake pedal vibration control, thereby preventing the brake pedal from resonating with the excitation source and effectively avoiding vibration of the brake pedal during use.

[0038] In summary, the present application determines the target frequency of the brake pedal according to the vehicle-related system, controls the operating speed of the excitation source according to the target frequency of the brake pedal, and prevents the modal coupling between the associated system and the brake pedal and the resonance between the brake pedal and the excitation source by controlling the design frequency of the brake pedal. This overcomes the technical defect that causes the natural frequency of the brake pedal to be easily coupled with the modal of the vehicle-related system, resulting in obvious pedal vibration, causing the user to have a significant perception of the braking vibration, thereby affecting the user experience. This application can effectively avoid vibrations during the use of the brake pedal. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0040] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0041] Figure 1 A schematic diagram of a flow chart provided for Embodiment 1 of the brake pedal vibration control method of the present application;

[0042] Figure 2 A flow chart of a second embodiment of the brake pedal vibration control method of the present application;

[0043] Figure 3 This is a schematic diagram of the module structure of the brake pedal vibration control device according to an embodiment of the present application;

[0044] Figure 4 This is a schematic diagram of the device structure of the hardware operating environment involved in the brake pedal vibration control method in the embodiment of the present application.

[0045] The purpose, features and advantages of this application will be further described in conjunction with the embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0046] It should be understood that the specific embodiments described herein are only used to explain the technical solutions of the present application and are not used to limit the present application.

[0047] In order to better understand the technical solution of the present application, a detailed description will be given below in conjunction with the accompanying drawings and specific implementation methods.

[0048] The main solution of the embodiment of the present application is: determine the design frequency range of the brake pedal based on the vehicle-related system; determine the target frequency of the brake pedal according to the design frequency range of the brake pedal; control the operating speed of the excitation source according to the target frequency of the brake pedal to achieve vibration control of the brake pedal.

[0049] As new energy vehicles require extremely high levels of intelligent driving, the braking system uses a highly integrated onebox system. If the inherent mode of the brake pedal is designed to fall near the vehicle-related modal group, the inherent frequency of the brake pedal is easily coupled with the vehicle-related system mode, resulting in obvious pedal vibration, which makes the user's perception of the brake vibration obvious, thus affecting the user experience. Therefore, how to effectively avoid the vibration of the brake pedal during use is a problem that needs to be solved urgently.

[0050] The present application determines the target frequency of the brake pedal according to the vehicle-related system, controls the operating speed of the excitation source according to the target frequency of the brake pedal, and prevents the modal coupling between the associated system and the brake pedal and the resonance between the brake pedal and the excitation source by controlling the design frequency of the brake pedal. This overcomes the technical defect that causes the natural frequency of the brake pedal to be easily coupled with the modal of the vehicle-related system, resulting in obvious pedal vibration, causing the user to have a significant perception of the braking vibration, thereby affecting the user experience. The present application can effectively avoid the vibration of the brake pedal during use.

[0051] It should be noted that the execution subject of this embodiment can be a computing service device with data processing, network communication and program running functions, such as a tablet computer, a personal computer, a mobile phone, etc., or an electronic device capable of realizing the above functions, a brake pedal vibration control device, etc. The following takes the brake pedal vibration control device as an example to illustrate this embodiment and the following embodiments.

[0052] Based on this, the embodiment of the present application provides a brake pedal vibration control method, referring to Figure 1 , Figure 1 This is a flow chart of the first embodiment of the brake pedal vibration control method of the present application.

[0053] In this embodiment, the brake pedal vibration control method includes steps S10 to S30:

[0054] Step S10, determining a design frequency range of the brake pedal based on the vehicle-related system.

[0055] It should be noted that the vehicle-related system refers to the system in the vehicle that directly or indirectly interacts with the brake pedal. The vibration mode and frequency characteristics of the associated system may affect the vibration of the brake pedal. Therefore, in order to determine the design frequency range of the brake pedal, it is necessary to consider the vibration mode and frequency characteristics of the vehicle-related system to avoid modal coupling and resonance with these systems.

[0056] In the specific implementation, the brake pedal vibration control device can obtain the vibration mode and frequency characteristic data of the vehicle's associated system, and determine the design frequency range of the brake pedal by analyzing and processing these data. This range should be able to avoid modal coupling and resonance with the associated system to ensure the stability and comfort of the brake pedal.

[0057] Step S20: determining a brake pedal target frequency according to a design frequency range of the brake pedal.

[0058] It should be noted that the brake pedal vibration control device can determine a suitable brake pedal target frequency based on the design frequency range, the performance requirements of the brake pedal and the vibration characteristics of the vehicle. This target frequency will serve as the basis for the subsequent control of the operating speed of the excitation source.

[0059] It is understandable that the determination of the target frequency requires comprehensive consideration of factors such as the vibration characteristics of the brake pedal, the modal characteristics of the vehicle-related systems, and the user's perception of the brake pedal vibration, so as to ensure that the brake pedal has good vibration control effects during actual use.

[0060] In a feasible implementation, step S20 may include: adjusting the mass of the brake pedal to obtain a reference frequency of the brake pedal; determining whether the reference frequency is within the design frequency range; when the reference frequency is within the design frequency range, using the reference frequency as the target frequency of the brake pedal; when the reference frequency is not within the design frequency range, executing the step of adjusting the mass of the brake pedal to obtain the reference frequency of the brake pedal.

[0061] It should be noted that by adjusting the brake pedal frequency to avoid the relevant system modal frequency, the vibration natural frequency is the system modal frequency, as shown in the following formula 1:

[0062]

[0063] In Equation 1, f is the system modal frequency, m is the system mass, and k is the system stiffness.

[0064] Since the brake pedal is a system close to a cantilever beam structure, changes in the mass of the pedal surface can make the modal and origin frequency response of the brake pedal more sensitive. Therefore, by reasonably adjusting the pedal surface to change its physical parameters, the pedal design parameters can be more effectively optimized and the weight changes can be smaller, making the pedal design scheme simpler and more flexible.

[0065] In the specific implementation, the modal frequency of the brake pedal is changed by adjusting the tread material and the tread weight until the brake pedal modal is designed to be within the design frequency range. For example, a low-cost metal pedal can be used, and the tread can be weighted to 230g using a 10mm thick steel plate to design the brake pedal modal to be within the design frequency range.

[0066] As shown in Table 1, Table 1 is a brake pedal modal frequency design table, which includes tread weight, tread material, brake pedal modal frequency and design frequency range. The design frequency range is 82-87. When the tread weight is 0 and the tread material is PA55+GF50, the brake pedal modal frequency is 95.3, which does not meet the design frequency range; when the tread weight is 0 and the tread material is a steel plate, the brake pedal modal frequency is 93.9, which does not meet the design frequency range; when the tread weight is 150 and the tread material is a steel plate, the brake pedal modal frequency is 87.15, which does not meet the design frequency range; when the tread weight is 230 and the tread material is a steel plate, the brake pedal modal frequency is 84.24, which meets the design frequency range; when the tread weight is 300 and the tread material is a steel plate, the brake pedal modal frequency is 84.04, which meets the design frequency range.

[0067] Table 1

[0068]

[0069] Step S30, controlling the operating speed of the excitation source according to the brake pedal target frequency to achieve vibration control of the brake pedal.

[0070] It should be noted that the excitation source refers to a device or equipment that can generate an excitation force or an excitation signal, and its operating speed will affect the vibration of the brake pedal. By controlling the operating speed of the excitation source, effective control of the brake pedal vibration can be achieved. The excitation source includes at least an air-conditioning blower, an air-conditioning compressor, an engine, a cooling fan, and an air suspension pump, and this embodiment does not specifically limit this.

[0071] It is understandable that the excitation source is one of the main sources of brake pedal vibration, and its operating speed will affect the vibration characteristics of the brake pedal. Therefore, by controlling the operating speed of the excitation source, the vibration of the brake pedal can be effectively controlled. The operating speed of the excitation source can be adjusted according to the target frequency of the brake pedal to avoid resonance with the target frequency of the brake pedal, thereby achieving vibration control of the brake pedal.

[0072] It is worth noting that the excitation source will generate vibration when rotating, thereby causing the brake pedal to resonate. The vibration frequency of the excitation source is the excitation frequency, as shown in the following formula 2:

[0073]

[0074] In formula 2, f is the excitation frequency, N is the operating speed of the excitation source, and n is the excitation order.

[0075] As shown in Table 2, Table 2 is the vehicle excitation source information table, which includes the vehicle excitation source, speed, excitation order and excitation frequency. The vehicle excitation source includes air-conditioning blower, air-conditioning compressor, engine, cooling fan and air suspension air pump. The corresponding excitation orders are 2, 1, 1, 1, 1, and the corresponding excitation frequencies are N1 / 30, N2 / 60, N3 / 60, N4 / 60, and N5 / 60, respectively.

[0076] Table 2

[0077]

[0078] In a feasible implementation manner, step S30 may include: determining a speed range of the excitation source according to the target frequency of the brake pedal; and controlling an operating speed of the excitation source according to the speed range of the excitation source.

[0079] It should be noted that the speed selection from N1 to N5 needs to avoid the brake pedal system modal frequency F 踏板 , that is |N X / 60-F 踏板 |≥6Hz, therefore, the speed of the excitation source N X Need to avoid speed 60*(F 踏板 ±6)Hz.

[0080] In the specific implementation, the engine operating speed range of a hybrid vehicle is from 750rpm to 3800rpm, and its second-order excitation frequency is 25Hz to 127Hz; the air-conditioning blower operates at 800rpm to 3100rpm, with a first-order excitation frequency of 13.3 to 51.7Hz, the air-conditioning compressor operates at 800rpm to 7500rpm, with a first-order excitation frequency of 13.3 to 125Hz; the cooling fan operates at 800rpm to 2400rpm, with a first-order excitation frequency of 13.3 to 40Hz; the air suspension air pump operates at a speed range of 2600 to 2800rpm, with a first-order excitation frequency of 43.3 to 46.7Hz, as shown in Table 3, which is a frequency table of excitation sources for a certain vehicle model.

[0081] Table 3

[0082]

[0083] It is understandable that the mode of the brake pedal is based on the unique structure of the car, and the empirical value is concentrated between 60 and 120 Hz. In the excitation frequency of the excitation source speed range in Table 3, the engine and compressor cannot completely avoid the brake pedal modal frequency when the excitation source operating speed covers the avoidance frequency. Therefore, the excitation source does not appear in a certain speed range to avoid the brake pedal mode. The specific principle adopts |N X / 60*Excitation Order-F 踏板|≥6Hz, so N X The speed should be avoided at 60 / excitation order*(F 踏板 ±6)Hz.

[0084] In a feasible implementation manner, determining the speed range of the excitation source according to the brake pedal target frequency includes: determining the excitation frequency range of the excitation source according to the brake pedal target frequency and a second preset frequency avoidance frequency; determining the speed range of the excitation source based on the excitation frequency range of the excitation source.

[0085] It should be noted that the second preset frequency avoidance frequency may be 6 Hz, that is, the target frequency of the brake pedal needs to avoid the excitation frequency of the excitation source by more than 6 Hz, that is, |F 激励源 -F 踏板 |≥6Hz, thus determining the excitation frequency range of the excitation source. The speed range of the excitation source can be determined based on the relationship between the excitation frequency, the excitation source operating speed, and the excitation order.

[0086] In the specific implementation, according to the principle of frequency-avoiding brake pedal of excitation source|N X / 60*nF 踏板 |≥6Hz, so the engine needs to avoid the frequency of 84.24±6Hz, that is, avoid the speed range of 2348~2707rpm, and cancel this speed range when calibrating the engine in hybrid mode; the compressor needs to avoid the frequency of 84.24±6Hz, that is, avoid the speed range of 4696~5414rpm. When calibrating the air-conditioning system, the compressor speed avoids this speed range.

[0087] The present embodiment provides a brake pedal vibration control method. The present embodiment can prevent the associated system from being modally coupled with the brake pedal and causing brake pedal resonance by first determining the design frequency range of the brake pedal based on the associated system of the whole vehicle; determining the brake pedal target frequency according to the design frequency range of the brake pedal to improve the accuracy of the brake pedal design; and controlling the operating speed of the excitation source according to the brake pedal target frequency to achieve brake pedal vibration control, which can prevent the brake pedal from resonating with the excitation source, thereby effectively avoiding vibration of the brake pedal during use.

[0088] In summary, this embodiment determines the target frequency of the brake pedal according to the vehicle-related system, controls the operating speed of the excitation source according to the target frequency of the brake pedal, and prevents modal coupling between the associated system and the brake pedal and resonance between the brake pedal and the excitation source by controlling the design frequency of the brake pedal. This overcomes the technical defect that the natural frequency of the brake pedal is easily coupled with the modal of the vehicle-related system, resulting in obvious pedal vibration, causing the user to have a significant perception of the braking vibration, thereby affecting the user experience. This embodiment can effectively avoid vibrations during the use of the brake pedal.

[0089] Based on the first embodiment of the present application, in the second embodiment of the present application, the same or similar contents as those in the above-mentioned embodiment 1 can refer to the above introduction, and will not be repeated later. Figure 2 , the step S10 further includes steps S101-S103:

[0090] Step S101, obtaining the whole vehicle associated system and the natural frequency corresponding to the whole vehicle associated system.

[0091] It should be noted that the vehicle-related system at least includes the front firewall of the body-in-white, the longitudinal beam of the body-in-white, the shock tower of the body-in-white, the cross beam of the dashboard of the body-in-white, the air conditioning box, the front subframe and the steering gear, and this embodiment does not impose specific restrictions on this. The body-in-white is the main carrier of the automobile body structure, which has the function of supporting the powertrain such as the engine and the gearbox and accommodating the driver and passengers. The body-in-white is mainly welded by the front firewall, the left and right side panels, the top cover, the floor and the cross beam of the dashboard, and is an important part of the automobile body. The front firewall of the body-in-white, the longitudinal beam of the body-in-white, the shock tower of the body-in-white and the cross beam of the dashboard of the body-in-white are important parts of the body-in-white, and there is a risk of modal coupling with the brake pedal; the air conditioning box is used to install the automobile air conditioner, which is an important part of the automobile body, and is close to the brake pedal, and there is a risk of modal coupling; the front subframe is a part of the automobile body structure, which is used to connect the engine and the front suspension system, and there is also a risk of modal coupling with the brake pedal; the steering gear is an important part of the automobile steering system, and is close to the brake pedal, and there is a risk of modal coupling. Therefore, in the design process of the brake pedal, it is necessary to comprehensively consider the modes of the vehicle-related systems such as the front firewall of the body-in-white, the longitudinal beam of the body-in-white, the shock tower of the body-in-white, the dashboard crossbeam of the body-in-white, the air-conditioning box, the front subframe and the steering gear, and determine the design frequency range of the brake pedal based on the modes of the vehicle-related systems, so as to avoid modal coupling between the brake pedal and the vehicle-related systems, which may cause obvious vibration of the brake pedal.

[0092] As shown in Table 4, Table 4 is a whole vehicle associated system information table, which includes whole vehicle associated systems and natural frequencies. The whole vehicle associated systems include the front firewall of the body-in-white, the longitudinal beam of the body-in-white, the shock tower of the body-in-white, the dashboard cross beam of the body-in-white, the air-conditioning box, the front subframe and the steering gear, and the corresponding natural frequencies are F1-F7 respectively.

[0093] Table 4

[0094]

[0095] Step S102, determining the natural frequency of the frequency-avoiding associated system according to the whole vehicle associated system and the natural frequency corresponding to the whole vehicle associated system.

[0096] It should be noted that the frequency-related system to be avoided refers to the vehicle-related system that has a modal coupling risk with the brake pedal. When determining the frequency-related system to be avoided, it is necessary to comprehensively consider factors such as the distance between the vehicle-related system and the brake pedal, structural characteristics, and vibration transmission path. Generally speaking, a vehicle-related system that is close to the brake pedal, has similar structural characteristics, and has a smooth vibration transmission path is more likely to have modal coupling with the brake pedal. Therefore, after obtaining the vehicle-related system and its natural frequency, the frequency-related system to be avoided can be screened out based on the above factors, and its corresponding natural frequency range can be determined.

[0097] In a feasible implementation, step 102 may include: obtaining a pedal braking interval, and determining a frequency-avoided associated system in the whole vehicle associated system based on the pedal braking interval; and determining a natural frequency of the frequency-avoided associated system based on a natural frequency corresponding to the whole vehicle associated system.

[0098] It should be noted that the design of the brake pedal needs to take into account the braking range that it may experience during actual use, that is, the displacement range of the pedal under different braking intensities. This range is crucial for determining the frequency-related system to be avoided, because the vibration characteristics and modal response of the brake pedal may be different under different braking intensities. By obtaining the pedal braking range, the modal coupling risk between the brake pedal and the vehicle-related system under various braking conditions can be more accurately evaluated.

[0099] It is understandable that based on the pedal braking range, the vehicle-related systems that have a high risk of modal coupling with the brake pedal in this range can be further screened out as frequency-related systems to be avoided. These systems usually have natural frequencies close to the brake pedal, or have components that are easily affected by the vibration of the brake pedal during operation. After determining the frequency-related systems to be avoided, it is necessary to analyze the natural frequency distribution of the frequency-related systems to be avoided based on their corresponding natural frequency ranges, and determine the frequency points or frequency ranges where modal coupling with the brake pedal may occur, so as to avoid overlap with them during the design of the brake pedal.

[0100] Step S103: determining a design frequency range of the brake pedal according to the natural frequency of the frequency-avoidance associated system and a first preset frequency-avoidance frequency.

[0101] It should be noted that when determining the design frequency range of the brake pedal, it is necessary to avoid overlapping with the natural frequency of the frequency-avoided associated system to prevent the brake pedal from modally coupling with these systems. Specifically, a safety margin can be set so that a certain interval is maintained between the design frequency range of the brake pedal and the natural frequency of the frequency-avoided associated system. In this way, even if there are certain frequency fluctuations during actual use, it can be ensured that the brake pedal will not modally couple with the frequency-avoided associated system, thereby ensuring the stability and comfort of the brake pedal.

[0102] It is understandable that the first preset frequency avoidance frequency can be 3HZ, and this embodiment does not impose any specific restrictions on this. Since the excitation source is a full-speed excitation, it is impossible to avoid the brake pedal mode at all speeds of the same excitation source. Therefore, the excitation source is not present in a certain speed range to avoid the brake pedal mode. However, the system modal design of the brake pedal mainly refers to the modal frequency avoidance design of its vehicle-related system. Therefore, the modes F1-F7 of the related system are first identified. The brake pedal mode is at least 3Hz away from all F1 to F7. The natural frequency of a certain system is F X , that is |F X -F 踏板 |≥3Hz, adjust the brake pedal design structure through this constraint, and determine the target frequency F of the brake pedal modal design 踏板 .

[0103] As shown in Table 5, Table 5 is the natural frequency table of the whole vehicle associated system of a certain model, including the whole vehicle associated system and the natural frequency. The whole vehicle associated system includes the front firewall of the body in white, the longitudinal beam of the body in white, the shock tower of the body in white, the dashboard cross beam of the body in white, the air-conditioning box, the front subframe and the steering gear, and the corresponding natural frequencies are 112.3, 77.9, 76.8, 45.6, 45.6, 58.8, 90.4, and 103, respectively.

[0104] Table 5

[0105]

[0106] It is understandable that in the conventional brake pedal range, the brake pedal modal frequency avoidance of the body-in-white longitudinal beam, body-in-white shock tower and front subframe mode needs to be designed. According to Table 5, the natural frequencies of the associated systems to be frequency avoided are 77.9, 76.8 and 90.4 respectively. Based on |F X -F 踏板 |≥3Hz, so the brake pedal modal design is optimal between 81.9 and 87.4Hz, that is, the design frequency range of the pedal modal is set at 82 to 87Hz.

[0107] In this embodiment, by determining the design frequency range of the brake pedal according to the natural frequency of the associated system to be avoided in the vehicle associated system and the first preset frequency avoidance frequency, modal coupling between the associated system and the brake pedal can be effectively prevented to cause brake pedal resonance.

[0108] It should be noted that the above examples are only used to understand the present application and do not constitute a limitation on the brake pedal vibration control method of the present application. More simple transformations based on this technical concept are all within the protection scope of the present application.

[0109] This application also provides a brake pedal vibration control device, please refer to Figure 3, the brake pedal vibration control device comprises:

[0110] The determination module 10 is used to determine the design frequency range of the brake pedal based on the vehicle-related system.

[0111] The determination module 10 is further configured to determine a brake pedal target frequency according to a design frequency range of the brake pedal.

[0112] The control module 20 is used to control the operating speed of the excitation source according to the target frequency of the brake pedal to achieve vibration control of the brake pedal.

[0113] The present embodiment provides a brake pedal vibration control device. The present embodiment can prevent the associated system from being modally coupled with the brake pedal and causing brake pedal resonance by first determining the design frequency range of the brake pedal based on the associated system of the whole vehicle; determining the brake pedal target frequency according to the design frequency range of the brake pedal to improve the accuracy of the brake pedal design; and controlling the operating speed of the excitation source according to the brake pedal target frequency to achieve vibration control of the brake pedal, which can prevent the brake pedal from resonating with the excitation source, thereby effectively avoiding vibration of the brake pedal during use.

[0114] In summary, this embodiment determines the target frequency of the brake pedal according to the vehicle-related system, controls the operating speed of the excitation source according to the target frequency of the brake pedal, and prevents modal coupling between the associated system and the brake pedal and resonance between the brake pedal and the excitation source by controlling the design frequency of the brake pedal. This overcomes the technical defect that the natural frequency of the brake pedal is easily coupled with the modal of the vehicle-related system, resulting in obvious pedal vibration, causing the user to have a significant perception of the braking vibration, thereby affecting the user experience. This embodiment can effectively avoid vibrations during the use of the brake pedal.

[0115] Optionally, the determination module 10 is also used to obtain the natural frequency of the whole vehicle associated system and the corresponding natural frequency of the whole vehicle associated system; determine the natural frequency of the frequency-avoided associated system according to the whole vehicle associated system and the corresponding natural frequency of the whole vehicle associated system; determine the design frequency range of the brake pedal according to the natural frequency of the frequency-avoided associated system and the first preset frequency-avoiding frequency.

[0116] Optionally, the determination module 10 is further used to obtain a pedal braking interval, and determine the frequency-avoided associated system in the whole vehicle associated system based on the pedal braking interval; and determine the natural frequency of the frequency-avoided associated system based on the natural frequency corresponding to the whole vehicle associated system.

[0117] Optionally, the determination module 10 is also used to adjust the mass of the brake pedal to obtain a reference frequency of the brake pedal; determine whether the reference frequency is within the design frequency range; when the reference frequency is within the design frequency range, use the reference frequency as the target frequency of the brake pedal; when the reference frequency is not within the design frequency range, execute the step of adjusting the mass of the brake pedal to obtain the reference frequency of the brake pedal.

[0118] Optionally, the control module 20 is further configured to determine a speed range of the excitation source according to the target frequency of the brake pedal; and control an operating speed of the excitation source according to the speed range of the excitation source.

[0119] Optionally, the control module 20 is further configured to determine an excitation frequency range of the excitation source according to the brake pedal target frequency and a second preset frequency avoidance frequency; and determine a rotation speed range of the excitation source based on the excitation frequency range of the excitation source.

[0120] Optionally, the whole vehicle association system includes at least a front firewall of the body-in-white, a longitudinal beam of the body-in-white, a shock tower of the body-in-white, a dashboard cross beam of the body-in-white, an air-conditioning box, a front subframe and a steering gear; the excitation source includes at least an air-conditioning blower, an air-conditioning compressor, an engine, a cooling fan and an air suspension air pump.

[0121] The brake pedal vibration control device provided by the present application adopts the brake pedal vibration control method in the above embodiment, and can solve the technical problem of brake pedal vibration control. Compared with the prior art, the beneficial effects of the brake pedal vibration control device provided by the present application are the same as the beneficial effects of the brake pedal vibration control method provided by the above embodiment, and other technical features in the brake pedal vibration control device are the same as the features disclosed in the above embodiment method, which will not be repeated here.

[0122] The present application provides a brake pedal vibration control device, which includes: at least one processor; and a memory that is communicatively connected to the at least one processor; wherein the memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the brake pedal vibration control method in the above-mentioned embodiment one.

[0123] Reference below Figure 4, which shows a schematic diagram of the structure of a brake pedal vibration control device suitable for implementing the embodiment of the present application. The brake pedal vibration control device in the embodiment of the present application may include but is not limited to mobile terminals such as mobile phones, laptop computers, digital broadcast receivers, PDAs (Personal Digital Assistants), PADs (Portable Application Descriptions), PMPs (Portable Media Players), vehicle-mounted terminals (such as vehicle-mounted navigation terminals), etc., and fixed terminals such as digital TVs, desktop computers, etc. Figure 4 The brake pedal vibration control device shown is merely an example and should not bring any limitation to the functions and scope of use of the embodiments of the present application.

[0124] like Figure 4 As shown, the brake pedal vibration control device may include a processing device 1001 (e.g., a central processing unit, a graphics processor, etc.), which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM: Read Only Memory) 1002 or a program loaded from a storage device 1003 to a random access memory (RAM: Random Access Memory) 1004. In RAM1004, various programs and data required for the operation of the brake pedal vibration control device are also stored. The processing device 1001, ROM1002, and RAM1004 are connected to each other through a bus 1005. An input / output (I / O) interface 1006 is also connected to the bus. Generally, the following systems can be connected to the I / O interface 1006: an input device 1007 including, for example, a touch screen, a touch pad, a keyboard, a mouse, an image sensor, a microphone, an accelerometer, a gyroscope, etc.; an output device 1008 including, for example, a liquid crystal display (LCD: Liquid Crystal Display), a speaker, a vibrator, etc.; a storage device 1003 including, for example, a magnetic tape, a hard disk, etc.; and a communication device 1009. Communication device 1009 can allow brake pedal vibration control device to communicate wirelessly or wired with other devices to exchange data. Although brake pedal vibration control device with various systems is shown in the figure, it should be understood that it is not required to implement or have all the systems shown. More or less systems can be implemented or have alternatively.

[0125] In particular, according to the embodiments disclosed in the present application, the process described above with reference to the flowchart can be implemented as a computer software program. For example, the embodiments disclosed in the present application include a computer program product, which includes a computer program carried on a computer-readable medium, and the computer program includes a program code for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from a network through a communication device, or installed from a storage device 1003, or installed from a ROM 1002. When the computer program is executed by the processing device 1001, the above-mentioned functions defined in the method of the embodiment disclosed in the present application are executed.

[0126] The brake pedal vibration control device provided by the present application adopts the brake pedal vibration control method in the above embodiment, which can solve the technical problem of brake pedal vibration control. Compared with the prior art, the beneficial effects of the brake pedal vibration control device provided by the present application are the same as the beneficial effects of the brake pedal vibration control method provided by the above embodiment, and other technical features in the brake pedal vibration control device are the same as the features disclosed in the method of the previous embodiment, which will not be repeated here.

[0127] It should be understood that the various parts disclosed in this application can be implemented by hardware, software, firmware or a combination thereof. In the description of the above embodiments, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0128] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

[0129] The present application provides a computer-readable storage medium having computer-readable program instructions (ie, computer programs) stored thereon, and the computer-readable program instructions are used to execute the brake pedal vibration control method in the above-mentioned embodiment.

[0130] The computer-readable storage medium provided in the present application may be, for example, a USB flash drive, but is not limited to electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, systems or devices, or any combination of the above. More specific examples of computer-readable storage media may include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In this embodiment, the computer-readable storage medium may be any tangible medium containing or storing a program that can be used by or in combination with an instruction execution system, system or device. The program code contained on the computer-readable storage medium may be transmitted using any appropriate medium, including but not limited to: wires, optical cables, RF (Radio Frequency), etc., or any suitable combination of the above.

[0131] The computer-readable storage medium may be included in the brake pedal vibration control device; or may exist independently without being assembled into the brake pedal vibration control device.

[0132] The above-mentioned computer-readable storage medium carries one or more programs. When the above-mentioned one or more programs are executed by the brake pedal vibration control device, the brake pedal vibration control device: determines the design frequency range of the brake pedal based on the whole vehicle associated system; determines the brake pedal target frequency according to the design frequency range of the brake pedal; controls the operating speed of the excitation source according to the brake pedal target frequency to achieve vibration control of the brake pedal.

[0133] Computer program code for performing the operations of the present application may be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, C++, and conventional procedural programming languages ​​such as "C" or similar programming languages. The program code may be executed entirely on the user's computer, partially on the user's computer, as a separate software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0134] The flow chart and block diagram in the accompanying drawings illustrate the possible architecture, function and operation of the system, method and computer program product according to various embodiments of the present application. In this regard, each square box in the flow chart or block diagram can represent a module, a program segment or a part of a code, and the module, the program segment or a part of the code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the square box can also occur in a sequence different from that marked in the accompanying drawings. For example, two square boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each square box in the block diagram and / or flow chart, and the combination of the square boxes in the block diagram and / or flow chart can be implemented with a dedicated hardware-based system that performs a specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0135] The modules involved in the embodiments described in this application may be implemented by software or hardware, wherein the name of the module does not constitute a limitation on the unit itself in some cases.

[0136] The readable storage medium provided in this application is a computer-readable storage medium, which stores computer-readable program instructions (i.e., computer programs) for executing the above-mentioned brake pedal vibration control method, and can solve the technical problem of brake pedal vibration control. Compared with the prior art, the beneficial effects of the computer-readable storage medium provided in this application are the same as the beneficial effects of the brake pedal vibration control method provided in the above-mentioned embodiment, and will not be repeated here.

[0137] The present application also provides a computer program product, comprising a computer program, wherein when the computer program is executed by a processor, the steps of the brake pedal vibration control method as described above are implemented.

[0138] The computer program product provided by the present application can solve the technical problem of brake pedal vibration control. Compared with the prior art, the beneficial effects of the computer program product provided by the present application are the same as the beneficial effects of the brake pedal vibration control method provided by the above embodiment, which will not be repeated here.

[0139] The above descriptions are only some embodiments of the present application, and are not intended to limit the patent scope of the present application. All equivalent structural changes made using the contents of the present application specification and drawings under the technical concept of the present application, or direct / indirect applications in other related technical fields are included in the patent protection scope of the present application.

Claims

1. A brake pedal vibration control method, characterized in that: The method comprises: Determine the design frequency range of the brake pedal based on the vehicle-related system; determining a brake pedal target frequency according to a design frequency range of the brake pedal; Controlling the operating speed of the excitation source according to the target frequency of the brake pedal to achieve vibration control of the brake pedal; The whole vehicle association system at least includes the front firewall of the body in white, the longitudinal beam of the body in white, the shock tower of the body in white, the instrument panel cross beam of the body in white, the air conditioning box, the front subframe and the steering gear; The excitation source includes at least an air-conditioning blower, an air-conditioning compressor, an engine, a cooling fan and an air suspension air pump.

2. The method according to claim 1, characterized in that The step of determining the design frequency range of the brake pedal based on the vehicle-related system includes: Obtain the whole vehicle related system and the natural frequency corresponding to the whole vehicle related system; Determine the natural frequency of the frequency-avoiding associated system according to the whole vehicle associated system and the natural frequency corresponding to the whole vehicle associated system; The design frequency range of the brake pedal is determined according to the natural frequency of the frequency-avoiding associated system and the first preset frequency-avoiding frequency.

3. The method according to claim 2, characterized in that The determining the natural frequency of the frequency-avoiding associated system according to the whole vehicle associated system and the natural frequency corresponding to the whole vehicle associated system comprises: Acquire a pedal braking interval, and determine a frequency-avoidance associated system in the vehicle associated system based on the pedal braking interval; The natural frequency of the frequency-avoiding associated system is determined based on the natural frequency corresponding to the whole vehicle associated system.

4. The method according to claim 1, characterized in that The step of determining the target frequency of the brake pedal according to the design frequency range of the brake pedal comprises: adjusting the mass of the brake pedal to obtain a reference frequency of the brake pedal; Determining whether the reference frequency is within the design frequency range; When the reference frequency is within the design frequency range, using the reference frequency as a brake pedal target frequency; When the reference frequency is not within the design frequency range, the step of adjusting the mass of the brake pedal to obtain the reference frequency of the brake pedal is performed.

5. The method according to claim 1, characterized in that The step of controlling the operating speed of the excitation source according to the brake pedal target frequency includes: determining a rotation speed range of the excitation source according to the brake pedal target frequency; The operating speed of the excitation source is controlled according to the speed range of the excitation source.

6. The method according to claim 5, characterized in that The step of determining the rotation speed range of the excitation source according to the brake pedal target frequency includes: Determining an excitation frequency range of an excitation source according to the brake pedal target frequency and a second preset frequency avoidance frequency; The rotation speed range of the excitation source is determined based on the excitation frequency range of the excitation source.

7. A brake pedal vibration control device, characterized in that: The brake pedal vibration control device comprises: A determination module, used to determine a design frequency range of a brake pedal based on a vehicle-related system; The determination module is further used to determine a brake pedal target frequency according to a design frequency range of the brake pedal; A control module, used for controlling the running speed of the excitation source according to the target frequency of the brake pedal to achieve vibration control of the brake pedal; The whole vehicle association system at least includes the front firewall of the body in white, the longitudinal beam of the body in white, the shock tower of the body in white, the instrument panel cross beam of the body in white, the air conditioning box, the front subframe and the steering gear; The excitation source includes at least an air-conditioning blower, an air-conditioning compressor, an engine, a cooling fan and an air suspension air pump.

8. A brake pedal vibration control device, characterized in that: The brake pedal vibration control device includes: a memory, a processor, and a brake pedal vibration control program stored in the memory and executable on the processor, wherein the brake pedal vibration control program is configured to implement the brake pedal vibration control method according to any one of claims 1 to 6.

9. A storage medium, characterized in that: The storage medium stores a brake pedal vibration control program, which, when executed by a processor, implements the brake pedal vibration control method according to any one of claims 1 to 6.

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