Vibration test method and apparatus for brake pedal, and electronic device and storage medium

Abstract

The present application relates to a vibration test method and apparatus for a brake pedal, and an electronic device and a storage medium. The method comprises: determining an excitation source and at least one stroke opening of a brake pedal to be tested; determining at least one excitation position on the basis of the excitation source, testing a target vehicle, acquiring a vibration signal at each excitation position, and determining an excitation signal at each excitation position on the basis of the vibration signal at each excitation position; and at each stroke opening, exciting a corresponding excitation position on the basis of the excitation signal, collecting a response signal of the brake pedal to be tested, and generating a vibration test result on the basis of the response signal.

Description

Vibration testing methods, devices, electronic equipment, and storage media for brake pedals

[0001] This application is based on and claims priority to Chinese Patent Application No. 202510079066.2, filed on January 17, 2025, entitled “Vibration Testing Method, Apparatus, Electronic Device and Storage Medium for Brake Pedal”, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of vehicle technology, and in particular to a method, apparatus, electronic device and storage medium for testing the vibration of a brake pedal. Background Technology

[0003] Braking is one of the most frequent actions during vehicle operation. When braking, the driver's foot needs to be placed on the brake pedal, at which point the foot may clearly feel vibration, resulting in brake pedal vibration. Brake pedal vibration not only directly affects the driving experience but also generates noise. This noise is the main source of noise, vibration, and harshness (NVH) during vehicle braking.

[0004] As the braking actuator, the brake pedal comes into direct contact with the driver's foot, and the vibration signals it transmits directly affect the comfort of the braking process. Therefore, it is crucial to conduct vibration tests on the brake pedal.

[0005] Related technologies construct vehicle braking quality evaluation models through simulation models, and then use these models to conduct vibration tests on the brake pedal. However, it is difficult to simulate the vibration of the brake pedal during actual operation using vehicle braking quality evaluation models, and it is also difficult to assess the vibration characteristics of the brake pedal under actual working conditions. Summary of the Invention

[0006] This application provides a vibration testing method, device, electronic device, and storage medium for brake pedals to solve the problem that related technologies are unable to simulate the vibration of brake pedals during actual operation. It can accurately describe the vibration characteristics of automotive brake pedals under different operating conditions and provide a scientific basis for brake pedal optimization.

[0007] One embodiment of this application provides a vibration testing method for a brake pedal, comprising the following steps:

[0008] Determine the excitation source and at least one travel opening of the brake pedal to be tested;

[0009] At least one excitation position is determined based on the excitation source, the target vehicle is tested, the vibration signal of each excitation position is obtained, and the excitation signal of each excitation position is determined based on the vibration signal of each excitation position.

[0010] At each stroke opening, the response signal of the brake pedal under test is collected according to the excitation position corresponding to the excitation signal, and vibration test results are generated based on the response signal.

[0011] Optionally, in some embodiments, before stimulating the corresponding stimulation position according to the stimulation signal, the method further includes:

[0012] The excitation signal is determined based on the frequency sweep signal input by the preset unit force.

[0013] Optionally, in some embodiments, the excitation source includes at least one of powertrain operation excitation, road surface excitation, and braking force excitation.

[0014] Optionally, in some embodiments, determining at least one excitation location based on the excitation source includes:

[0015] When the excitation source is a powertrain operation excitation, the excitation location is determined to be a powertrain operation excitation.

[0016] When the excitation source is the road surface excitation and / or the braking force excitation, the excitation location is determined to be the wheel center and the shock absorber assembly.

[0017] Another embodiment of this application provides a vibration testing device for a brake pedal, comprising:

[0018] The determination module is used to determine the excitation source and at least one travel opening of the brake pedal under test;

[0019] The testing module is used to determine at least one excitation position based on the excitation source, test the target vehicle, acquire the vibration signal at each excitation position, and determine the excitation signal at each excitation position based on the vibration signal at each excitation position.

[0020] The generation module is used to acquire the response signal of the brake pedal under test at each stroke opening according to the excitation position corresponding to the excitation signal, and generate vibration test results based on the response signal.

[0021] Optionally, in some embodiments, the test module includes:

[0022] The determining unit is used to determine the excitation signal based on the frequency sweep signal input by the preset unit force.

[0023] Optionally, in some embodiments, the excitation source includes at least one of powertrain operation excitation, road surface excitation, and braking force excitation.

[0024] Optionally, in some embodiments, the test module is used to:

[0025] When the excitation source is a powertrain operation excitation, the excitation location is determined to be a powertrain operation excitation.

[0026] When the excitation source is the road surface excitation and / or the braking force excitation, the excitation location is determined to be the wheel center and the shock absorber assembly.

[0027] Another embodiment of this application provides an electronic device, including: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the vibration testing method for a brake pedal as described in the above embodiments.

[0028] Another embodiment of this application provides a computer-readable storage medium having a computer program stored thereon, which is executed by a processor to implement the vibration testing method for a brake pedal as described in the above embodiments.

[0029] In this embodiment, the excitation source and at least one travel opening of the brake pedal to be tested are determined; at least one excitation position is determined based on the excitation source; the target vehicle is tested, and vibration signals at each excitation position are acquired; an excitation signal for each excitation position is determined based on the vibration signals at each excitation position; at each travel opening, the corresponding excitation position is excited according to the excitation signal, the response signal of the brake pedal to be tested is collected, and vibration test results are generated based on the response signal. Since the excitation signal at each excitation position is determined based on the vibration signal at each excitation position, and the vibration signal at each excitation position is obtained by testing the target vehicle, the excitation signal at each excitation position can simulate the excitation situation of the target vehicle during actual operation. Therefore, the response signal collected based on the excitation signal can simulate the vibration situation of the brake pedal during actual operation. Furthermore, since at least one travel opening is set, different travel openings can simulate different working conditions; therefore, this embodiment can accurately describe the vibration characteristics of the car brake pedal under different working conditions, providing a scientific basis for the optimization of the brake pedal.

[0030] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0031] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein:

[0032] Figure 1 is a flowchart of a vibration testing method for a brake pedal according to an embodiment of this application;

[0033] Figure 2 is a schematic diagram of the principle of a vibration testing method for a brake pedal according to an embodiment of this application;

[0034] Figure 3 is a schematic diagram of the test results under the excitation signal determined according to the actual vehicle operating conditions provided in an embodiment of this application;

[0035] Figure 4 is a schematic diagram of the test results under the excitation signal determined by the frequency sweep signal of the preset unit force according to an embodiment of this application;

[0036] Figure 5 is a block diagram of a vibration testing device for a brake pedal according to an embodiment of this application;

[0037] Figure 6 is a schematic diagram of the structure of an electronic device provided according to an embodiment of this application. Detailed Implementation

[0038] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0039] The vibration testing method, apparatus, electronic device, and storage medium for a brake pedal according to embodiments of this application are described below with reference to the accompanying drawings. Addressing the problem mentioned in the background art that it is difficult to simulate the vibration of a brake pedal during actual operation, this application provides a vibration testing method for a brake pedal. In this method, an excitation source and at least one travel opening of the brake pedal to be tested are determined; at least one excitation position is determined based on the excitation source; a target vehicle is tested, and vibration signals at each excitation position are acquired; an excitation signal for each excitation position is determined based on the vibration signals at each excitation position; at each travel opening, the corresponding excitation position is excited according to the excitation signal, a response signal of the brake pedal to be tested is acquired, and a vibration test result is generated based on the response signal. Since the excitation signal for each excitation position is determined based on the vibration signal at each excitation position, and the vibration signal at each excitation position is obtained by testing the target vehicle, the excitation signal at each excitation position can simulate the excitation situation of the target vehicle during actual operation. Therefore, the response signal acquired based on the excitation signal can simulate the vibration of the brake pedal during actual operation. Furthermore, since at least one stroke opening is set, different stroke openings can simulate different working conditions; therefore, the embodiments of this application can accurately describe the vibration characteristics of the car brake pedal under different working conditions, providing a scientific basis for the optimization of the brake pedal.

[0040] Specifically, Figure 1 is a schematic flowchart of a brake pedal vibration testing method provided in an embodiment of this application. The subject of this method is an electronic device. As shown in Figure 1, the brake pedal vibration testing method includes the following steps:

[0041] In step S101, the excitation source of the brake pedal to be tested and at least one travel opening are determined.

[0042] The excitation sources include at least one of the following: powertrain operating excitation, road surface excitation, and braking force excitation. Powertrain operating excitation refers to the periodic or non-periodic forces or torques generated by the powertrain system during operation. Road surface excitation refers to the forces or torques generated by the road surface. Braking force excitation refers to the forces or torques applied during braking to initiate or drive deceleration; braking force excitation can also be called braking torque excitation.

[0043] The travel opening of the brake pedal under test refers to the ratio of the travel distance of the brake pedal when it is depressed to the total travel distance of the brake pedal; the brake pedal travel refers to the vertical distance traveled by the brake pedal from the fully released state to the fully depressed state.

[0044] It should be noted that, based on the generation mechanism of the vibration problem of the brake pedal under test, the excitation source is mainly divided into powertrain excitation, road excitation and braking force excitation; the travel opening of the brake pedal under test can be preset by relevant personnel. For example, based on the whole vehicle test, according to the usual working conditions in which the brake pedal vibration problem occurs, the travel opening of the brake pedal under test can be set to 1 / 2 and 1 / 4 respectively, or the travel opening can be customized according to the test requirements.

[0045] In step S102, at least one excitation position is determined based on the excitation source, the target vehicle is tested, the vibration signal of each excitation position is obtained, and the excitation signal of each excitation position is determined based on the vibration signal of each excitation position.

[0046] Optionally, in some embodiments, determining at least one excitation location based on the excitation source includes: determining the excitation location as powertrain operation excitation when the excitation source is powertrain operation excitation; and determining the excitation location as wheel center and shock absorber assembly when the excitation source is road surface excitation and / or braking force excitation.

[0047] As can be understood, as shown in Figure 2, the powertrain excitation is mainly input to the vehicle body through the powertrain mounting point, causing the vehicle body to vibrate. Since the brake pedal is rigidly connected to the firewall of the vehicle body, the vibration signal will be transmitted to the brake pedal. Therefore, the path of the vibration signal is defined as the mounting point of the powertrain on the vehicle body; in other words, the path of the vibration signal is defined as powertrain mounting point - vehicle body - brake pedal. The excitation signal of the input point (excitation source) is defined as the actual vibration signal of the actual vehicle mounting point; in other words, the excitation signal of the input point (excitation source) is defined as the vibration signal of the powertrain mounting point of the target vehicle, and the excitation signal of the input point defined in this embodiment is consistent with the actual situation. Road surface excitation and braking force excitation are mainly transmitted to the vehicle body through the wheel hub via the suspension, and then to the brake pedal. Therefore, when the excitation source is road surface excitation and / or braking force excitation, the path of the vibration signal is defined as two levels: the wheel hub and the suspension-vehicle contact point (shock absorber mounting point); in other words, the path of the vibration signal is defined as wheel hub - suspension-vehicle contact point - vehicle body - brake pedal. The excitation signals from the excitation sources are the measured vibration signals at the corresponding excitation locations.

[0048] In other words, when the excitation source is the powertrain excitation and the transmission component is the powertrain mount, the embodiments of this application arrange a three-dimensional acceleration sensor on the powertrain mount of the target vehicle, acquire the vibration signal of the powertrain mount under actual vehicle operating conditions, and determine the excitation signal of the powertrain suspension based on the vibration signal of the powertrain mount.

[0049] When the excitation source is road surface excitation and braking force excitation, the vibration signal transmission path mainly passes through the wheel hub, through the suspension, to the vehicle body, and then to the brake pedal. Therefore, the vibration signal transmission path is defined as two levels: the first level is the wheel hub, and the second level is the suspension-vehicle contact point (i.e., the shock absorber mounting point). Three-dimensional acceleration sensors are arranged at the wheel hub and the shock absorber mounting point on the vehicle body of the target vehicle. It should be noted that the vibration measurement point of the wheel hub is recommended to be located in the middle of the steering knuckle, which is conducive to the arrangement of the exciter. Under the actual vehicle operating conditions, the vibration signals of the wheel hub and the shock absorber are obtained, and the corresponding excitation signal is determined based on the vibration signals of the wheel hub and the shock absorber.

[0050] In actual implementation, this application embodiment obtains the vibration signal of the excitation source by testing the target vehicle, and determines the excitation signal based on the vibration signal. Specifically, three-dimensional acceleration sensors are arranged at the mounting point on the powertrain body side, the wheel core (the vibration measuring point of the wheel core is recommended to be located in the middle of the steering knuckle, which is conducive to the arrangement of the exciter), and the shock absorber mounting point on the body to obtain the vibration signal under actual working conditions.

[0051] The actual vehicle operating condition is defined as follows: after the vehicle reaches a speed of 120 kPH, the brake pedal is pressed, and the vehicle speed decreases to 50 kPH within 8-10 seconds. The test is repeated until three sets of vibration signals with good consistency are obtained, as shown in Table 1. Table 1 is the acquisition table of vibration signals under the actual vehicle operating condition. The actual vehicle operating condition is defined as follows: after the vehicle reaches a speed of 120 kPH, the brake pedal is pressed, and the vehicle speed decreases to 50 kPH within 8-10 seconds. The test is repeated until three sets of vibration signals with good consistency are obtained. For example, through multiple tests, the vibration acceleration curves of the powertrain mounting point in the X, Y, and Z directions based on the rotational speed are recorded, the amplitude of the vibration peak value of the vibration signal and the corresponding rotational speed or rotational speed range are identified, and then the frequency or frequency range of the vibration signal is determined.

[0052] Table 1

[0053] In step S103, at each stroke opening, the response signal of the brake pedal to be tested is collected according to the excitation position corresponding to the excitation signal, and the vibration test result is generated based on the response signal.

[0054] Optionally, the target vehicle is positioned based on each stroke opening. This process can be as follows: In this embodiment of the application, weight is applied to the brake pedal (foot pedal position) of the target vehicle so that the stroke of the brake pedal reaches the stroke opening. The applied weight can be achieved by adding an additional mass, and the added mass must be rigidly connected to the pedal.

[0055] Optionally, static excitation can be used instead of dynamic excitation, where the static excitation can be an exciter. Correspondingly, the step of acquiring the response signal of the brake pedal under test based on the excitation position corresponding to the excitation signal can be as follows: an exciter is used to excite the excitation position, and the excitation signal is set to the frequency-domain vibration amplitude curve at each point under actual operating conditions for excitation data acquisition. In other words, the exciter arouses the excitation signal at the excitation position, and the excitation signal causes vehicle vibration, which in turn causes the brake pedal under test to vibrate. The response signal of the brake pedal under test is then acquired, and this response signal is used to characterize the vibration of the brake pedal under test. The response signal of the brake pedal under test can be acquired using a vibration acceleration sensor.

[0056] As shown in Table 2, the data acquisition parameters of the vibration accelerometer were set as follows during actual execution: the frequency of the vibration accelerometer was 20-100Hz, the signal resolution was 1Hz, and rectangular windows were used for both input and output. That is, both the input and output signals of the vibration accelerometer were multiplied by a matrix window function to reduce spectral leakage of the response signal and improve signal resolution. Furthermore, all sensors (exciter and vibration accelerometer) were calibrated according to standard requirements.

[0057] Table 2

[0058] In this embodiment, the response point is the middle of the driver's foot on the brake pedal body under test. Sensitivity is achieved using a frequency response function as the data type. The excitation is defined as the force of the vibrator at each input point, and the response point is defined as the acceleration signal on the pedal. Coherence is also introduced to effectively avoid external interference. For the sensitivity signal acquired using actual vibration as input, the main focus is on identifying the response amplitude and the frequency corresponding to the vibration peak, for practical problem solving. Correspondingly, the vibration test results can be assigned to the response value and the frequency corresponding to the vibration peak.

[0059] Therefore, during the testing process, the exciter was used to excite each measuring point according to the vibration amplitude curve measured under actual working conditions. This means that the magnitude and frequency variation of the force applied by the exciter are completely consistent with the excitation experienced by that point during actual vehicle driving. The data collected in this way can realistically simulate the vibration excitation experienced by the brake pedal in actual vehicle use, thereby accurately evaluating the vibration response and sensitivity of the brake pedal under actual working conditions. This is of great significance for analyzing and solving the brake pedal vibration problem that occurs in actual driving, and can help engineers understand the vibration characteristics of the brake pedal in real-world usage scenarios, providing a basis for optimized design.

[0060] Optionally, in some embodiments, before stimulating the corresponding excitation position according to the excitation signal, the method further includes: determining the excitation signal according to a sweep frequency signal input by a preset unit force.

[0061] Optionally, as shown in Table 2, in addition to determining the excitation signal based on the actual vehicle operating conditions, the embodiments of this application can also determine the excitation signal based on a preset unit force input sweep frequency signal. The preset unit force input sweep frequency signal is a standardized test signal, which is not generated based on the actual vehicle operating conditions, but is an excitation signal set by the tester according to the test requirements.

[0062] In actual operation, the exciter excites the excitation position according to a preset unit force input frequency sweep signal, starting from the lowest frequency and gradually increasing the frequency until the highest frequency is reached. At each frequency point, the exciter applies a constant unit force, and the response signal of the brake pedal is observed and recorded. For the unit force frequency sweep signal as the input sensitivity signal, the main focus is on the response amplitude, which is used to form a target value based on a large amount of statistical data.

[0063] It should be noted that the frequency response curve obtained by exciting the frequency sweep signal with a preset unit force input identifies the natural frequency of each measuring point. It is recommended that the natural frequencies of each path measuring point be spaced 3Hz apart, and the natural frequencies of the path and the pedal assembly be spaced 5Hz apart, to ensure frequency avoidance between paths and between the path and the response, and to avoid resonance amplification caused by modal coupling.

[0064] Therefore, data collected under a sweep frequency signal excitation with a preset unit force input is primarily used to identify the natural frequency and frequency response characteristics of the brake pedal. By analyzing the pedal's response amplitude at different frequencies, the resonant and non-resonant frequency regions of the pedal can be determined. This information is crucial for establishing a vibration model of the brake pedal, predicting its vibration behavior under different excitation conditions, and developing vibration control strategies. Furthermore, by statistically analyzing a large amount of data under a unit force sweep frequency signal excitation, target values ​​can be generated to evaluate whether the brake pedal vibration sensitivity meets design requirements.

[0065] In summary, the embodiments of this application determine the excitation signal through actual vehicle operating conditions to simulate and analyze the vibration of the brake pedal under actual driving conditions, directly addressing practical problems for testing and analysis; the frequency sweep signal with preset unit force input is used for basic research and performance evaluation; and the standardized excitation signal provides a comprehensive understanding of the vibration characteristics of the brake pedal, providing theoretical support for design and optimization.

[0066] According to the vibration testing method for brake pedals proposed in this application, the excitation source and at least one travel opening of the brake pedal to be tested are determined, and at least one excitation position is determined based on the excitation source. The target vehicle is tested, and vibration signals at each excitation position are acquired. An excitation signal for each excitation position is determined based on the vibration signal at each excitation position. At each travel opening, the corresponding excitation position is excited according to the excitation signal, and the response signal of the brake pedal to be tested is collected. A vibration test result is generated based on the response signal. Since the excitation signal for each excitation position is determined based on the vibration signal at each excitation position, and the vibration signal at each excitation position is obtained by testing the target vehicle, the excitation signal at each excitation position can simulate the excitation situation of the target vehicle during actual operation. Therefore, the response signal collected based on the excitation signal can simulate the vibration situation of the brake pedal during actual operation. Furthermore, since at least one travel opening is set, different travel openings can simulate different working conditions. Therefore, this application embodiment can describe the vibration characteristics of the automotive brake pedal under different working conditions, providing a scientific basis for brake pedal optimization.

[0067] Next, the vibration testing device for a brake pedal according to an embodiment of this application is described with reference to the accompanying drawings.

[0068] Figure 5 is a block diagram of the vibration testing device for the brake pedal according to an embodiment of this application.

[0069] As shown in Figure 5, the vibration testing device 10 for the brake pedal includes: a determination module 100, a testing module 200, and a generation module 300.

[0070] The determination module 100 is used to determine the excitation source and at least one travel opening of the brake pedal to be tested.

[0071] The test module 200 is used to determine at least one excitation position based on the excitation source, test the target vehicle, acquire the vibration signal at each excitation position, and determine the excitation signal at each excitation position based on the vibration signal at each excitation position.

[0072] The generation module 300 is used to collect the response signal of the brake pedal under test according to the excitation position corresponding to the excitation signal at each stroke opening, and generate vibration test results based on the response signal.

[0073] Optionally, in some embodiments, the test module 200 includes a determination unit.

[0074] The determining unit is used to determine the excitation signal based on the frequency sweep signal input by the preset unit force.

[0075] Optionally, in some embodiments, the excitation source includes at least one of powertrain operation excitation, road surface excitation, and braking force excitation.

[0076] Optionally, in some embodiments, the test module 200 is used for:

[0077] When the excitation source is powertrain operation excitation, the excitation location is determined to be powertrain operation excitation; when the excitation source is road surface excitation and / or braking force excitation, the excitation location is determined to be wheel center and shock absorber assembly.

[0078] It should be noted that the explanation of the aforementioned embodiment of the vibration test method for the brake pedal also applies to the vibration test device for the brake pedal in this embodiment, and will not be repeated here.

[0079] The brake pedal vibration testing device proposed in this application determines the excitation source and at least one travel opening of the brake pedal to be tested, and determines at least one excitation position based on the excitation source. It then tests a target vehicle, acquires vibration signals at each excitation position, determines an excitation signal for each excitation position based on the vibration signals, and, at each travel opening, excites the corresponding excitation position according to the excitation signal, collects the response signal of the brake pedal to be tested, and generates vibration test results based on the response signals. Since the excitation signal for each excitation position is determined based on the vibration signal at that position, and the vibration signal at each excitation position is obtained by testing the target vehicle, the excitation signal at each excitation position can simulate the excitation situation of the target vehicle during actual operation. Therefore, the response signal collected based on the excitation signal can simulate the vibration situation of the brake pedal during actual operation. Furthermore, since at least one travel opening is set, different travel openings can simulate different working conditions. Therefore, this application embodiment can describe the vibration characteristics of the automotive brake pedal under different working conditions, providing a scientific basis for brake pedal optimization.

[0080] Figure 6 is a schematic diagram of the structure of an electronic device provided in an embodiment of this application. The electronic device may include:

[0081] The memory 601, the processor 602, and the computer program stored on the memory 601 and capable of running on the processor 602.

[0082] When the processor 602 executes the program, it implements the vibration testing method for the brake pedal provided in the above embodiments.

[0083] Furthermore, electronic devices also include:

[0084] Communication interface 603 is used for communication between memory 601 and processor 602.

[0085] The memory 601 is used to store computer programs that can run on the processor 602.

[0086] The memory 601 may include high-speed RAM (Random Access Memory) memory, and may also include non-volatile memory, such as at least one disk storage.

[0087] If the memory 601, processor 602, and communication interface 603 are implemented independently, they can be interconnected via a bus to communicate with each other. The bus can be an ISA (Industry Standard Architecture) bus, a PCI (Peripheral Component Interconnect) bus, or an EISA (Extended Industry Standard Architecture) bus, etc. Buses can be categorized as address buses, data buses, control buses, etc. For ease of representation, only one thick line is used in Figure 6, but this does not indicate that there is only one bus or one type of bus.

[0088] Optionally, in a specific implementation, if the memory 601, processor 602, and communication interface 603 are integrated on a single chip, then the memory 601, processor 602, and communication interface 603 can communicate with each other through an internal interface.

[0089] The processor 602 may be a CPU (Central Processing Unit), an ASIC (Application Specific Integrated Circuit), or one or more integrated circuits configured to implement the embodiments of this application.

[0090] This application also provides a computer-readable storage medium storing a computer program thereon, which, when executed by a processor, implements the above-described method for testing the vibration of a brake pedal.

[0091] This application also provides a computer program product, including a computer program for implementing the above-described method for testing the vibration of a brake pedal.

[0092] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0093] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "N" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0094] Any process or method described in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or more N executable instructions for implementing custom logic functions or processes, and the scope of the preferred embodiments of this application includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order depending on the functions involved, as should be understood by those skilled in the art to which embodiments of this application pertain.

[0095] It should be understood that the various parts of this application can be implemented using hardware, software, firmware, or a combination thereof. In the above embodiments, the N steps or methods can be implemented using software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, it can be implemented using any one or a combination of the following techniques known in the art: discrete logic circuits having logic gates for implementing logical functions on data signals, application-specific integrated circuits (ASICs) having suitable combinational logic gates, programmable gate arrays (FPGAs), field-programmable gate arrays (FPGAs), etc.

[0096] Those skilled in the art will understand that all or part of the steps of the methods in the above embodiments can be implemented by a program instructing related hardware. The program can be stored in a computer-readable storage medium, and when executed, the program includes one or a combination of the steps of the method embodiments.

[0097] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A vibration testing method for a brake pedal, wherein, include: Determine the excitation source and at least one travel opening of the brake pedal to be tested; At least one excitation position is determined based on the excitation source, the target vehicle is tested, the vibration signal of each excitation position is obtained, and the excitation signal of each excitation position is determined based on the vibration signal of each excitation position. At each stroke opening, the response signal of the brake pedal under test is collected according to the excitation position corresponding to the excitation signal, and vibration test results are generated based on the response signal.

2. The method according to claim 1, wherein, Before stimulating the corresponding stimulation position according to the stimulation signal, the method further includes: The excitation signal is determined based on the frequency sweep signal input by the preset unit force.

3. The method according to claim 1, wherein, The excitation source includes at least one of the following: powertrain operation excitation, road surface excitation, and braking force excitation.

4. The method according to claim 3, wherein, Determining at least one excitation location based on the excitation source includes: When the excitation source is a powertrain operation excitation, the excitation location is determined to be a powertrain operation excitation. When the excitation source is the road surface excitation and / or the braking force excitation, the excitation location is determined to be the wheel center and the shock absorber assembly.

5. A vibration testing device for a brake pedal, wherein, include: The determination module is used to determine the excitation source and at least one travel opening of the brake pedal under test; The testing module is used to determine at least one excitation position based on the excitation source, test the target vehicle, acquire the vibration signal at each excitation position, and determine the excitation signal at each excitation position based on the vibration signal at each excitation position. The generation module is used to acquire the response signal of the brake pedal under test at each stroke opening according to the excitation position corresponding to the excitation signal, and generate vibration test results based on the response signal.

6. The apparatus according to claim 5, wherein, The test module includes: The determining unit is used to determine the excitation signal based on the frequency sweep signal input by the preset unit force.

7. The apparatus according to claim 5, wherein, The excitation source includes at least one of the following: powertrain operation excitation, road surface excitation, and braking force excitation.

8. The apparatus according to claim 7, wherein, The test module is used for: When the excitation source is a powertrain operation excitation, the excitation location is determined to be a powertrain operation excitation. When the excitation source is the road surface excitation and / or the braking force excitation, the excitation location is determined to be the wheel center and the shock absorber assembly.

9. An electronic device, wherein, include: The device includes a memory, a processor, and a computer program stored in the memory and executable on the processor, the processor executing the program to implement the vibration testing method for a brake pedal as described in any one of claims 1-4.

10. A computer-readable storage medium having a computer program stored thereon, wherein, The program is executed by the processor to implement the vibration test method for the brake pedal as described in any one of claims 1-4.

11. A computer program product, wherein, Includes a computer program, which is executed to implement the vibration testing method for a brake pedal as described in any one of claims 1-4.

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