Method, device and medium for determining vehicle onboard hydrogen system test data

Abstract

The present application relates to the technical field of vehicle testing, and discloses a method for determining the test data of the vehicle's onboard hydrogen system, including: determining the test mileage of each first vehicle under each working condition; obtaining the road spectrum data of the first vehicle in the process of completing the test mileage of each working condition through a sensor; determining the frequency domain damage value of the first vehicle according to the frequency range of the vibration frequency in the road spectrum data and the acceleration of the points arranged within each frequency range; determining the acceleration bench spectrum according to the frequency domain damage value and the acceleration, and the acceleration bench spectrum is used to input into the vibration bench to perform stability testing on the onboard hydrogen system to be tested. The test data determined in this way is applicable to the onboard hydrogen systems of all vehicle models, and the stability test can be performed on all onboard hydrogen systems that need to be tested according to the test data, which improves the universal applicability of the test and can make the test scene unified and standardized.

Description

Background Art

[0002] There are two main conventional verification methods for the durability performance verification of the vehicle's own vehicle hydrogen system. One is to carry out a road durability test on the test site by mounting the produced vehicle hydrogen system on the whole vehicle, and the other is to fix the vehicle hydrogen system on an electromagnetic vibration table for a fixed-frequency constant-amplitude vibration durability test. However, the inspection method used in the prior art is too time-consuming and has high testing costs. Moreover, the test data of this method is based on empirical data and often has certain limitations. Its verification method is limited to all models of vehicle-mounted hydrogen systems. Therefore, it is not universally applicable to newly developed vehicle-mounted hydrogen systems, resulting in low accuracy of its test results. Summary of the invention

[0003] The purpose of this application is to provide a method, device, medium and electronic device for determining the test data of the vehicle's onboard hydrogen system. This application can improve the universality of the test of the vehicle's onboard hydrogen system, and the test efficiency is high, ensuring the accuracy of the test.

[0004] Other features and advantages of the present application will become apparent from the following detailed description, or may be learned in part by the practice of the present application.

[0005] According to one aspect of an embodiment of the present application, a method for determining test data of an onboard hydrogen system of a vehicle is provided, wherein the onboard hydrogen system includes at least one distribution point, each distribution point is equipped with a sensor, and the method includes:

[0006] Determining a test mileage of each first vehicle under each operating condition, wherein the test mileage is determined based on actual road condition data of multiple models of second vehicles;

[0007] Acquiring, by means of the sensor, road spectrum data of the first vehicle during the process of completing the test mileage of each working condition, the road spectrum data including the acceleration and vibration frequency of the distribution points;

[0008] Determine the frequency domain damage value of the first vehicle according to the frequency range of the vibration frequency in the road spectrum data and the acceleration of the points arranged within each frequency range;

[0009] Determine an acceleration test bench spectrum according to the frequency domain damage value and the acceleration, wherein the acceleration test bench spectrum includes a power spectrum density of acceleration in each direction at each frequency;

[0010] The acceleration table spectrum is input into a vibration table to perform a stability test on the onboard hydrogen system to be tested.

[0011] In one embodiment of the present application, determining the test mileage of each first vehicle under each operating condition includes:

[0012] Acquire actual road condition data of a plurality of second vehicles during driving, wherein the actual road condition data includes accelerations of the second vehicles in the X, Y, and Z directions respectively during driving;

[0013] Determining the operating condition of each second vehicle during driving and the actual mileage corresponding to each operating condition according to the acceleration of each second vehicle in the X, Y, and Z directions respectively;

[0014] The test mileage corresponding to each working condition is determined based on the ratio of the actual mileage corresponding to each working condition to the actual total mileage.

[0015] In one embodiment of the present application, the first vehicle includes multiple models of fuel cell electric vehicles, the load state of the first vehicle includes a first load state and a second load state, and the road spectrum data of the first vehicle in the process of completing the test mileage of each working condition through the sensor includes:

[0016] For each first vehicle, the sensor is used to obtain road spectrum data generated when the first vehicle is in the first load state and in the second load state and completes the test mileage corresponding to each working condition, and the road spectrum data includes the acceleration and vibration frequency of the distribution points of the first vehicle.

[0017] In one embodiment of the present application, the frequency domain damage value of the first vehicle is determined according to the frequency range of the vibration frequency in the road spectrum data and the acceleration of the points arranged in each frequency range, including determining the frequency domain damage value FDS (f ) of the first vehicle according to formula (1): n ):

[0018]

[0019] Among them, f n refers to the circumferential frequency of the vibration, T refers to the time taken by the first vehicle to complete the test mileage of all working conditions, K refers to the elastic stiffness of the on-board hydrogen system, b and C are fatigue formulas, Q is the dynamic amplification factor, Q is a constant, P acc (f n ) refers to the acceleration of the distribution point at the vibration frequency f n The power spectral density at Γ is expressed as follows for any variable g:

[0020]

[0021] Among them, Γ represents the gamma function, and g refers to the variable of the gamma function.

[0022] In one embodiment of the present application, the power spectrum density of acceleration in each direction is calculated according to formula (3):

[0023]

[0024] Among them, P equ (f n ) refers to the random vibration spectrum, T eq It refers to the vibration duration of the vibration table.

[0025] In one embodiment of the present application, the vehicle-mounted hydrogen system includes a bracket, a clamp and a gasket, and the vehicle distribution point is located at the connection between the gasket and the vehicle body, and / or at the connection between the bracket and the vehicle body.

[0026] In one embodiment of the present application, the method is applied to a fuel cell electric vehicle.

[0027] According to one aspect of an embodiment of the present application, a device for determining vehicle-mounted hydrogen system test data is provided, comprising:

[0028] A data acquisition unit is used to obtain actual road condition data of a plurality of second vehicles, and to obtain road spectrum data of the first vehicle during the process of completing the test mileage of each working condition, wherein the road spectrum data includes acceleration and vibration frequency of the distribution points;

[0029] A first data processing unit is used to determine the test mileage of each first vehicle under each working condition according to the actual road condition data;

[0030] A second data processing unit is used to determine the frequency domain damage value of the first vehicle according to the frequency range of the vibration frequency in the road spectrum data and the acceleration of the points arranged in each frequency range;

[0031] The test data processing unit is used to determine an acceleration bench spectrum according to the frequency domain damage value and the acceleration, wherein the acceleration bench spectrum includes a power spectrum density of acceleration in each direction at each frequency, and the acceleration bench spectrum is used to input into a vibration bench to perform a stability test on the on-board hydrogen system to be tested.

[0032] According to one aspect of an embodiment of the present application, a computer program product or a computer program is provided, the computer program product or the computer program including computer instructions, the computer instructions being stored in a computer-readable storage medium. A processor of a computer device reads the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions, so that the computer device executes the method for determining vehicle-mounted hydrogen system test data as described in the above embodiment.

[0033] According to one aspect of an embodiment of the present application, a computer-readable storage medium is provided, on which a computer program is stored. The computer program includes executable instructions. When the executable instructions are executed by a processor, the method for determining the test data of the on-board hydrogen system as described in the above embodiment is implemented.

[0034] According to one aspect of an embodiment of the present application, an electronic device is provided, characterized in that the electronic device includes one or more processors and one or more memories, at least one program code is stored in the one or more memories, and the at least one program code is loaded and executed by the one or more processors to implement the operations performed by the above-mentioned method.

[0035] In the technical solution of the embodiment of the present application, by installing sensors at each point on the on-board hydrogen system, the actual road condition data of the second vehicle is obtained through the sensors on the second vehicle to determine the test mileage of each first vehicle under each working condition, and then the road spectrum data of the first vehicle in the process of completing the test mileage of each working condition is obtained through the sensors on the first vehicle, and the frequency domain damage value and the acceleration bench spectrum of the first vehicle are determined according to the frequency range of the vibration frequency in the road spectrum data and the acceleration of the points within each frequency range. When the on-board hydrogen system to be tested needs to be tested later, the acceleration bench spectrum can be used to input into the vibration bench to perform stability testing on the on-board hydrogen system to be tested. The test data determined in this way is applicable to the on-board hydrogen systems of all models, and the stability test can be performed on all on-board hydrogen systems that need to be tested according to the test data, which improves the universal applicability of the test and makes the test scenario unified and standardized. Furthermore, the test data determined by the above method can be used for simulation analysis of the on-board hydrogen system in the design stage, as well as system bench testing of the on-board hydrogen system in the prototype stage. Therefore, the reliability verification and rectification of the hydrogen system can be completed in advance, reducing the failure rate of the reliability verification of the on-board hydrogen system of the actual vehicle, and effectively shortening the development cycle.

[0036] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The drawings herein are incorporated into the specification and constitute a part of the specification, showing embodiments consistent with the present application, and together with the specification, are used to explain the principles of the present application. Obviously, the drawings described below are only some embodiments of the present application, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0038] Figure 1It is a flow chart of a method for determining vehicle-mounted hydrogen system test data according to an embodiment of the present application;

[0039] Figure 2 A schematic diagram of the locations of key points of an onboard hydrogen system of a vehicle according to an embodiment of the present application;

[0040] Figure 3 A schematic diagram of a test process of a test vehicle according to an embodiment of the present application;

[0041] Figure 4 It is a structural block diagram of a device for determining vehicle-mounted hydrogen system test data according to an embodiment of the present application;

[0042] Figure 5 It is a schematic diagram of the system structure of an electronic device according to an embodiment of the present application. DETAILED DESCRIPTION

[0043] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this application will be more comprehensive and complete and fully convey the concept of the example embodiments to those skilled in the art.

[0044] In addition, described feature, structure or characteristic can be combined in one or more embodiments in any suitable manner. In the following description, many specific details are provided to provide a full understanding of the embodiments of the present application. However, those skilled in the art will appreciate that the technical scheme of the present application can be put into practice without one or more of the specific details, or other methods, components, devices, steps, etc. can be adopted. In other cases, known methods, devices, realizations or operations are not shown or described in detail to avoid blurring the various aspects of the application.

[0045] The block diagrams shown in the accompanying drawings are merely functional entities and do not necessarily correspond to physically independent entities. That is, these functional entities may be implemented in software form, or in one or more hardware modules or integrated circuits, or in different networks and / or processor devices and / or microcontroller devices.

[0046] The flowcharts shown in the accompanying drawings are only exemplary and do not necessarily include all the contents and operations / steps, nor must they be executed in the order described. For example, some operations / steps can be decomposed, and some operations / steps can be combined or partially combined, so the actual execution order may change according to actual conditions.

[0047] It should be noted that the "multiple" mentioned in this article refers to two or more. "And / or" describes the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the associated objects before and after are in an "or" relationship.

[0048] The implementation details of the technical solution of the embodiment of the present application are described in detail below:

[0049] First of all, it should be noted that the scheme for determining the test data of the on-board hydrogen system proposed in this application can be applied to the detection scenario of the on-board hydrogen system of fuel cell electric vehicles. In the process from the completion of production to the actual application of the on-board hydrogen system, it is often necessary to conduct a test field road durability test to verify the structural stability and durability of the on-board hydrogen system. In addition, due to the differences in vehicle brands and models, the structure of the vehicle hydrogen system matched with different vehicles will also be different. Therefore, it is particularly important to conduct universal testing of on-board hydrogen systems of different brands and models, and to ensure the accuracy of the test.

[0050] According to one aspect of the present application, a method for determining test data of an onboard hydrogen system of a vehicle is provided. Figure 1 The flowchart of the method for determining the vehicle-mounted hydrogen system test data of a vehicle according to an embodiment of the present application is shown. The method for determining the vehicle-mounted hydrogen system test data of the vehicle can be performed by a device having a computing and processing function. The method for determining the vehicle-mounted hydrogen system test data of the vehicle includes at least steps 110 to 140, which are described in detail as follows:

[0051] In step 110 , the test mileage of each first vehicle under each operating condition is determined.

[0052] In the present application, the test mileage of each first vehicle under each operating condition can be determined first. Among them, the first vehicle refers to a vehicle that performs a durability test on the on-board hydrogen system on the test site road. The first vehicle can be a fuel electric vehicle. Each first vehicle needs to complete the test mileage under different operating conditions. The operating conditions may include braking conditions, urban conditions, acceleration and deceleration conditions, steering conditions, and bad road conditions. There may be certain differences in the test mileage corresponding to different operating conditions. For example, the test mileage under braking conditions is 10km, and the test mileage under urban conditions is 20km. Specifically, the test mileage is determined based on the actual road condition data of multiple models of second vehicles. The second vehicle can also be a fuel electric vehicle, and a data collector can be installed on each second vehicle, which can be used to collect the actual road condition data of each second vehicle during actual driving. Then the test mileage can be determined based on the actual road condition data of multiple second vehicles. Furthermore, each second vehicle has an on-board hydrogen system, and the structure of the on-board hydrogen system of different models of second vehicles may be different. Sensors may also be installed at key points of the onboard hydrogen system of each second vehicle to collect accelerations of the key points of the second vehicle during driving.

[0053] In one embodiment, the vehicle-mounted hydrogen system includes a bracket, a clamp and a gasket, and the vehicle distribution point is located at the connection between the gasket and the vehicle body, and / or at the connection between the bracket and the vehicle body.

[0054] Reference Figure 2 , Figure 2 A schematic diagram of the locations of key points of the on-board hydrogen system of a vehicle in one embodiment is shown. The on-board hydrogen system includes a bracket, a clamp and a gasket. Specifically, the on-board hydrogen system may include a gas cylinder clamp, a gas cylinder bracket and a rubber pad. According to the requirements of the vibration durability assessment object, the vibration durability of the on-board hydrogen system mainly assesses the durability reliability of the installation structure strength of the on-board hydrogen system, so the points are mainly concentrated on the connection points between the on-board hydrogen system and the vehicle body. Therefore, the points of the vehicle are located at the connection between the pad and the vehicle body, and / or at the connection between the bracket and the vehicle body. The vehicle may have multiple points, such as at least 5 points on an on-board hydrogen system. Specifically, the key nodes may be located such as Figure 2 The triangle mark shown. Differences in vehicle brands and models will also lead to certain differences in the structure of the on-board hydrogen system, and the location of the on-board hydrogen system will also be different. Therefore, Figure 2 It is only a schematic diagram of the structure of the on-board hydrogen system and does not limit the specific structure of the hydrogen system in this solution.

[0055] Furthermore, the acceleration of the distribution points includes the acceleration of the distribution points in the X, Y, and Z directions respectively. Among them, the center point of the entire vehicle body is taken as the origin, the straight line where the center point of the front of the vehicle and the center point of the rear of the vehicle are located is determined as the X-axis, the direction of the vehicle body perpendicular to the X-axis is the Y-axis, and the straight line direction perpendicular to the entire vehicle body is the Z-axis direction. The direction of the rear of the vehicle is the +X direction, and the direction of the front of the vehicle is the -X direction. Looking from the rear of the vehicle to the front of the vehicle, the left direction of the rear of the vehicle is the +Y direction, and the right direction of the rear of the vehicle is the -Y direction. The direction of the vehicle body toward the ground is the -Z direction, and the direction of the vehicle body away from the ground is the +Z direction.

[0056] In one embodiment, determining the test mileage of each first vehicle under each operating condition includes: obtaining actual road condition data of multiple second vehicles during driving, the actual road condition data including the accelerations of the second vehicles in the X, Y, and Z directions during driving; determining the operating condition of each second vehicle during driving and the actual mileage corresponding to each operating condition according to the accelerations of each second vehicle in the X, Y, and Z directions respectively; determining the test mileage corresponding to each operating condition according to the ratio of the actual mileage corresponding to each operating condition to the actual total mileage.

[0057] Specifically, the actual road condition data of the second vehicle includes the acceleration of the second vehicle's points in the X, Y, and Z directions during driving, and the working condition of each second vehicle during driving is determined according to the acceleration of each second vehicle in the X, Y, and Z directions. For example, within 3 seconds, the acceleration of the second vehicle A in the X direction is -60km / h, which means that the second vehicle A has performed an extremely fast deceleration operation in a very short period of time, and it can be considered that the working condition of the second vehicle A within the 3 seconds is an acceleration and deceleration condition. In the actual process, the determination of the working condition is more complicated, for example, it is also necessary to combine the acceleration in the X, Y, and Z directions and the steering operation. This is just a simple example, and it should not be considered that this example limits the present solution.

[0058] Furthermore, after determining the operating conditions of each second vehicle during driving, the actual mileage of each second vehicle under each operating condition can be determined. Then, the test mileage corresponding to each operating condition can be determined based on the proportion of the actual mileage of each operating condition to the total mileage of the second vehicle under all operating conditions, so that the test vehicle, i.e., the first vehicle, can perform a durability test on the onboard hydrogen system on the test site road. During the test, the first vehicle will travel under different operating conditions, and the driving distance is the test mileage corresponding to the operating condition.

[0059] Continue to refer to Figure 1 In step 120, the road spectrum data of the first vehicle in the process of completing the test mileage of each working condition is obtained through sensors, and the road spectrum data includes the acceleration and vibration frequency of the distribution points.

[0060] The first vehicle includes an on-board hydrogen system, and the on-board hydrogen system includes at least one distribution point. A sensor can be installed at each distribution point respectively. Therefore, the road spectrum data of the first vehicle can be acquired through the sensors at the distribution points on the on-board hydrogen system of the first vehicle. The road spectrum data is the data generated by the first vehicle in the process of completing the test mileage corresponding to each working condition. Specifically, the road spectrum data includes the acceleration of the distribution points on the on-board hydrogen system of the first vehicle and the vibration frequency of the distribution points.

[0061] In one embodiment, the first vehicle includes multiple models of fuel cell electric vehicles, the load state of the first vehicle includes a first load state and a second load state, and the road spectrum data of the first vehicle in the process of completing the test mileage of each working condition is obtained through sensors, including: for each first vehicle, the road spectrum data generated by the first vehicle in the process of completing the test mileage corresponding to each working condition in the first load state and in the second load state is obtained through sensors, and the road spectrum data includes the acceleration and vibration frequency of the distribution points of the first vehicle.

[0062] The first vehicle may also be a fuel cell electric vehicle, specifically a fuel cell electric vehicle. It may include vehicles of various brands and models. The load states of the vehicle include two types, namely, the first load state and the second load state. Among them, the first load state and the second load state may refer to half load and full load. Full load means that the weight of passengers or the weight of goods carried by the vehicle reaches the preset weight value, and half load means that the weight of passengers or the weight of goods carried by the vehicle reaches half of the preset weight value. The preset weight value may be set by a technician. When the first vehicle conducts a durability test on the onboard hydrogen system on the test site road, the first vehicle not only needs to be driven under full load and under different working conditions, but also the driving distance is the test mileage corresponding to the working condition. It is also necessary to drive under half load and under different working conditions, and the driving distance is the test mileage corresponding to the working condition. Therefore, the road spectrum data includes the data generated by the first vehicle in the first load state and in the second load state to complete the test mileage corresponding to each working condition. Specifically, the road spectrum data of the first vehicle includes the acceleration and vibration frequency of the points on the onboard hydrogen system of the first vehicle.

[0063] Reference Figure 3 , Figure 3 A schematic diagram of a test flow of a test vehicle in one embodiment is shown.

[0064] like Figure 3As shown, after determining the test mileage of the first vehicle under each working condition, the total test mileage corresponding to all working conditions can be calculated. Next, a cycle test will be carried out for all first vehicles. Specifically, for each first vehicle in a half-loaded state, the first vehicle will complete the test mileage corresponding to each working condition. For example, the first vehicle completes the test mileage corresponding to the bad road condition under the bad road condition, and then the first vehicle completes the test mileage corresponding to the braking condition under the braking condition, and so on, until the first vehicle completes the test mileage corresponding to the condition under all working conditions. At the same time, the first vehicle also needs to repeat the above process under a fully loaded state until the first vehicle completes the test mileage corresponding to the condition under all working conditions under a fully loaded state. It should be noted that there is no specific order when completing the test mileage of the above working conditions, and it can be adjusted according to the actual situation, as long as each first vehicle completes the test mileage corresponding to it under different working conditions. The working condition of the first vehicle can be controlled by the driver. If it is an autonomous driving vehicle, it can also intelligently control the vehicle to enter different working conditions to complete the test mileage required for different working conditions. I will not go into details here.

[0065] Continue to refer to Figure 1 In step 130, the frequency domain damage value of the first vehicle is determined according to the frequency range of the vibration frequency in the road spectrum data and the acceleration of the points arranged in each frequency range.

[0066] The road spectrum data includes the acceleration and vibration frequency of the distribution points on the onboard hydrogen system of the first vehicle. Since there are multiple distribution points and the first vehicle will be in different working conditions during the driving process of the first vehicle, there will also be multiple accelerations and vibration frequencies. Therefore, after obtaining all the road spectrum data of the first vehicle, the frequency ranges of multiple vibration frequencies can be counted, and the acceleration within each frequency range can be determined, and the frequency domain damage value of the first vehicle has been determined.

[0067] In one embodiment, the frequency domain damage value of the first vehicle is determined according to the frequency range of the vibration frequency in the road spectrum data and the acceleration of the points arranged in each frequency range, including determining the frequency domain damage value FDS (f ) of the first vehicle according to formula (1): n ):

[0068]

[0069] Among them, f n refers to the circumferential frequency of the vibration, T refers to the time taken by the first vehicle to complete the test mileage of all working conditions, K refers to the elastic stiffness of the on-board hydrogen system, b and C are fatigue formulas, Q is the dynamic amplification factor, Q is a constant, P acc (f n ) refers to the acceleration of the distribution point at the vibration frequency fn The power spectral density at Γ is expressed as follows for any variable g:

[0070]

[0071] Among them, Γ represents the gamma function, and g refers to the variable of the gamma function.

[0072] Continue to refer to Figure 1 In step 140, an acceleration bench spectrum is determined according to the frequency domain damage value and the acceleration. The acceleration bench spectrum includes the power spectrum density of the acceleration in each direction at each frequency. The acceleration bench spectrum is used to input into a vibration bench to perform a stability test on the onboard hydrogen system to be tested.

[0073] In one embodiment, the power spectral density of acceleration in each direction is calculated according to formula (3):

[0074]

[0075] Among them, P equ (f n ) refers to the random vibration spectrum, T eq It refers to the vibration duration of the vibration table.

[0076] In a specific embodiment of the present application, as shown in Table 1, a data table of vibration durability test data of a vehicle-mounted hydrogen system bench is shown in one embodiment.

[0077] Table 1

[0078]

[0079] X, Y, and Z in the above Table 1 are the average values ​​of acceleration in the X, Y, and Z directions respectively obtained based on the road spectrum data of all the first vehicles. The vibration test duration refers to the duration of testing the onboard hydrogen system to be tested on the vibration bench. This duration is set by the technicians according to the project maintenance requirements and can be adjusted as needed.

[0080] Furthermore, as shown in Table 2, a data schematic diagram of the random vibration acceleration power spectrum density of the vehicle-mounted hydrogen system in one embodiment is shown.

[0081]

[0082]

[0083] Specifically, the road spectrum data includes the acceleration and vibration frequency of the distribution points on the onboard hydrogen system of the first vehicle. Since there are multiple distribution points, and the first vehicle will be in different working conditions during the driving of the first vehicle, there will also be multiple accelerations and vibration frequencies. Therefore, after obtaining all the road spectrum data of the first vehicle, the frequency ranges of multiple vibration frequencies can be counted, that is, the frequencies in Table 2 above, such as 5Hz, 10Hz, 20Hz, etc. The power spectrum density of acceleration in each direction can be calculated according to the above formula (3), that is, the X-axis acceleration power spectrum density (g2 / Hz), the Y-axis acceleration power spectrum density (g2 / Hz) and the Z-axis acceleration power spectrum density (g2 / Hz).

[0084] After determining the acceleration bench spectrum, when the on-board hydrogen system to be tested needs to be tested later, the technician can input the acceleration bench spectrum into the vibration bench, and then set the test duration by himself to test the on-board hydrogen system to be tested. The test data is the power spectrum density of the acceleration in each direction at each frequency included in the acceleration bench spectrum. That is, after the technician inputs the acceleration bench spectrum into the vibration bench, the vibration bench will automatically read the data in the acceleration bench spectrum, and then adjust the vibration frequency to the vibration frequency in Table 2 in turn, and also adjust the acceleration in each direction to the data in Table 2, so as to achieve the stability test of the on-board hydrogen system to be tested.

[0085] In summary, by installing sensors at each point on the on-board hydrogen system, the actual road condition data of the second vehicle is obtained through the sensors on the second vehicle to determine the test mileage of each first vehicle under each working condition, and then the road spectrum data of the first vehicle in the process of completing the test mileage of each working condition is obtained through the sensors on the first vehicle, and the frequency domain damage value and acceleration bench spectrum of the first vehicle are determined according to the frequency range of the vibration frequency in the road spectrum data and the acceleration of the points within each frequency range. When the on-board hydrogen system to be tested needs to be tested later, the acceleration bench spectrum can be used to input into the vibration bench to perform stability testing on the on-board hydrogen system to be tested. The test data determined in this way is applicable to the on-board hydrogen systems of all models, and the stability test can be performed on all on-board hydrogen systems that need to be tested according to the test data, which improves the universal applicability of the test and makes the test scenario unified and standardized. Furthermore, the test data determined by the above method can be used for simulation analysis of the on-board hydrogen system in the design stage, as well as system bench testing of the on-board hydrogen system in the prototype stage. Therefore, the reliability verification and rectification of the hydrogen system can be completed in advance, reducing the failure rate of the reliability verification of the on-board hydrogen system of the actual vehicle, and effectively shortening the development cycle.

[0086] The following describes an embodiment of the device of the present application, which can be used to execute the method for determining the vehicle-mounted hydrogen system test data in the above embodiment of the present application. For details not disclosed in the embodiment of the device of the present application, please refer to the embodiment of the method for determining the vehicle-mounted hydrogen system test data in the above embodiment of the present application.

[0087] Figure 4 It is a structural block diagram of a device for determining test data of an onboard hydrogen system of a vehicle according to an embodiment of the present application.

[0088] Reference Figure 4 As shown, according to an embodiment of the present application, a device 400 for determining test data of an onboard hydrogen system of a vehicle comprises: a data acquisition unit 401 , a first data processing unit 402 , a second data processing unit 403 and a test data processing unit 404 .

[0089] Among them, the data acquisition unit 401 is used to obtain actual road condition data of multiple second vehicles, and to obtain road spectrum data of the first vehicle in the process of completing the test mileage of each working condition, and the road spectrum data includes the acceleration and vibration frequency of the distribution points; the first data processing unit 402 is used to determine the test mileage of each first vehicle under each working condition according to the actual road condition data; the second data processing unit 403 is used to determine the frequency domain damage value of the first vehicle according to the frequency range of the vibration frequency in the road spectrum data and the acceleration of the distribution points within each frequency range; the test data processing unit 404 is used to determine the acceleration bench spectrum according to the frequency domain damage value and the acceleration, and the acceleration bench spectrum includes the power spectrum density of the acceleration in each direction at each frequency, and the acceleration bench spectrum is used to input into the vibration bench to perform stability test on the on-board hydrogen system to be tested.

[0090] As another aspect, the present application also provides a computer-readable storage medium on which a program product capable of implementing the method for determining vehicle-mounted hydrogen system test data described above in this specification is stored. In some possible implementations, various aspects of the present application may also be implemented in the form of a program product, which includes a program code, and when the program product is run on a terminal device, the program code is used to enable the terminal device to execute the steps described in the above “Example Method” section of this specification according to various exemplary implementations of the present application.

[0091] According to the program product for implementing the above method in the embodiment of the present application, it can adopt a portable compact disk read-only memory (CD-ROM) and include program code, and can be run on a terminal device, such as a personal computer. However, the program product of the present application is not limited thereto. In this document, a readable storage medium can be any tangible medium containing or storing a program, which can be used by or in combination with an instruction execution system, an apparatus or a device.

[0092] The program product may use any combination of one or more readable media. The readable medium may be a readable signal medium or a readable storage medium. The readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or device, or any combination of the above. More specific examples (non-exhaustive list) of readable storage media include: an electrical connection with one or more wires, a portable 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.

[0093] Computer readable signal media may include data signals propagated in baseband or as part of a carrier wave, in which readable program code is carried. Such propagated data signals may take a variety of forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the above. Readable signal media may also be any readable medium other than a readable storage medium, which may send, propagate, or transmit a program for use by or in conjunction with an instruction execution system, apparatus, or device.

[0094] The program code embodied on the readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wired, optical cable, RF, etc., or any suitable combination of the foregoing.

[0095] Program code for performing the operations of the present application may be written in any combination of one or more programming languages, including object-oriented programming languages ​​such as Java, C++, etc., and conventional procedural programming languages ​​such as "C" or similar programming languages. The program code may be executed entirely on the user computing device, partially on the user device, as a separate software package, partially on the user computing device and partially on a remote computing device, or entirely on a remote computing device or server. In the case of a remote computing device, the remote computing device may be connected to the user computing device through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computing device (e.g., using an Internet service provider to connect through the Internet).

[0096] As another aspect, the present application also provides an electronic device capable of implementing the above method.

[0097] Those skilled in the art will appreciate that various aspects of the present application may be implemented as a system, method or program product. Therefore, various aspects of the present application may be specifically implemented in the following forms, namely: a complete hardware implementation, a complete software implementation (including firmware, microcode, etc.), or a combination of hardware and software, which may be collectively referred to as "circuit", "module" or "system" herein.

[0098] Refer to the following Figure 5 To describe the electronic device according to this embodiment of the present application. Figure 5 The electronic 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.

[0099] like Figure 5 As shown, the electronic device is in the form of a general computing device. The components of the electronic device may include but are not limited to: at least one processing unit 510, at least one storage unit 520, and a bus 530 connecting different system components (including the storage unit 520 and the processing unit 510).

[0100] The storage unit stores program codes, which can be executed by the processing unit 510, so that the processing unit 510 executes the steps described in the above “Example Method” section of this specification according to various exemplary implementations of the present application.

[0101] The storage unit 520 may include a readable medium in the form of a volatile storage unit, such as a random access memory unit (RAM) 521 and / or a cache memory unit 522 , and may further include a read-only memory unit (ROM) 523 .

[0102] The storage unit 520 may also include a program / utility 524 having a set (at least one) of program modules 525, such program modules 525 including but not limited to: an operating system, one or more application programs, other program modules, and program data, each of which or some combination may include an implementation of a network environment.

[0103] Bus 530 may represent one or more of several types of bus structures, including a memory unit bus or memory unit controller, a peripheral bus, an accelerated graphics port, a processing unit, or a local bus using any of a variety of bus architectures.

[0104] The electronic device may also communicate with one or more external devices 1200 (e.g., keyboards, pointing devices, Bluetooth devices, etc.), may communicate with one or more devices that enable a user to interact with the electronic device, and / or may communicate with any device that enables the electronic device to communicate with one or more other computing devices (e.g., routers, modems, etc.). Such communication may be performed via an input / output (I / O) interface 550. Furthermore, the electronic device may also communicate with one or more networks (e.g., local area networks (LANs), wide area networks (WANs), and / or public networks, such as the Internet) via a network adapter 560. As shown, the network adapter 560 communicates with other modules of the electronic device via a bus 530. It should be understood that, although not shown in the figure, other hardware and / or software modules may be used in conjunction with the electronic device, including but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, and data backup storage systems, etc.

[0105] Through the description of the above implementation methods, it is easy for those skilled in the art to understand that the example implementation methods described here can be implemented by software or by combining software with necessary hardware. Therefore, the technical solution according to the implementation methods of the present application can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (which can be a CD-ROM, a USB flash drive, a mobile hard disk, etc.) or on a network, and includes several instructions to enable a computing device (which can be a personal computer, a server, a terminal device, or a network device, etc.) to execute the method according to the implementation methods of the present application.

[0106] In addition, the above-mentioned figures are only schematic illustrations of the processes included in the method according to the exemplary embodiments of the present application, and are not intended to be limiting. It is easy to understand that the processes shown in the above-mentioned figures do not indicate or limit the time sequence of these processes. In addition, it is also easy to understand that these processes can be performed synchronously or asynchronously, for example, in multiple modules.

[0107] It should be understood that the present application is not limited to the precise structures that have been described above and shown in the drawings, and that various modifications and changes may be performed without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims

1. A method for determining test data of an onboard hydrogen system of a vehicle, characterized in that: The vehicle-mounted hydrogen system includes at least one distribution point, each distribution point is equipped with a sensor, and the method includes: Determining a test mileage of each first vehicle under each operating condition, wherein the test mileage is determined based on actual road condition data of multiple models of second vehicles; Acquiring, by means of the sensor, road spectrum data of the first vehicle during the process of completing the test mileage of each working condition, the road spectrum data including the acceleration and vibration frequency of the distribution points; Determine the frequency domain damage value of the first vehicle according to the frequency range of the vibration frequency in the road spectrum data and the acceleration of the points arranged within each frequency range; An acceleration bench spectrum is determined according to the frequency domain damage value and the acceleration, wherein the acceleration bench spectrum includes a power spectrum density of acceleration in each direction at each frequency, and the acceleration bench spectrum is used to be input into a vibration bench to perform a stability test on the onboard hydrogen system to be tested.

2. The method according to claim 1, characterized in that: Determining the test mileage of each first vehicle under each operating condition includes: Acquire actual road condition data of a plurality of second vehicles during driving, the actual road condition data including accelerations of the second vehicles in the X, Y, and Z directions during driving; Determining the operating condition of each second vehicle during driving and the actual mileage corresponding to each operating condition according to the acceleration of each second vehicle in the X, Y, and Z directions respectively; The test mileage corresponding to each working condition is determined based on the ratio of the actual mileage corresponding to each working condition to the actual total mileage.

3. The method according to claim 1, characterized in that The first vehicle includes multiple models of fuel cell electric vehicles, the load state of the first vehicle includes a first load state and a second load state, and the road spectrum data of the first vehicle in the process of completing the test mileage of each working condition obtained by the sensor includes: For each first vehicle, the sensor is used to obtain road spectrum data generated when the first vehicle is in the first load state and in the second load state and completes the test mileage corresponding to each working condition, and the road spectrum data includes the acceleration and vibration frequency of the distribution points of the first vehicle.

4. The method according to claim 1, characterized in that Determine the frequency domain damage value of the first vehicle according to the frequency range of the vibration frequency in the road spectrum data and the acceleration of the points arranged in each frequency range, including determining the frequency domain damage value FDS (f n ): Among them, f n refers to the circumferential frequency of the vibration, T refers to the time taken by the first vehicle to complete the test mileage of all working conditions, K refers to the elastic stiffness of the on-board hydrogen system, b and C are fatigue constant terms, Q is the dynamic amplification factor, Q is a constant, P acc (f n ) refers to the acceleration of the distribution point at the vibration frequency f n The power spectral density at Γ is expressed as follows for any variable g: Among them, Γ represents the gamma function, g refers to the variable of the gamma function, and x is the integral variable.

5. The method according to claim 4, characterized in that The power spectral density of acceleration in each direction is calculated according to formula (3): Among them, P equ (f n ) refers to the power spectral density, T eq It refers to the vibration duration of the vibration table.

6. The method according to claim 1, characterized in that The vehicle-mounted hydrogen system includes a bracket, a clamp and a gasket, and the vehicle distribution point is located at the connection between the gasket and the vehicle body, and / or at the connection between the bracket and the vehicle body.

7. The method according to claim 1, characterized in that The method is applied to fuel cell electric vehicles.

8. A device for determining test data of a vehicle-mounted hydrogen system, characterized in that: The device comprises: A data acquisition unit is used to obtain actual road condition data of multiple second vehicles, and to obtain road spectrum data of the first vehicle during the process of completing the test mileage of each working condition, wherein the road spectrum data includes acceleration and vibration frequency of the distribution points; A first data processing unit is used to determine the test mileage of each first vehicle under each working condition according to the actual road condition data; A second data processing unit is used to determine the frequency domain damage value of the first vehicle according to the frequency range of the vibration frequency in the road spectrum data and the acceleration of the points arranged in each frequency range; The test data processing unit is used to determine an acceleration bench spectrum according to the frequency domain damage value and the acceleration, wherein the acceleration bench spectrum includes a power spectrum density of acceleration in each direction at each frequency, and the acceleration bench spectrum is used to input into a vibration bench to perform a stability test on the on-board hydrogen system to be tested.

9. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores at least one program code, and the at least one program code is loaded and executed by a processor to implement the operations performed by the method according to any one of claims 1 to 7.

10. An electronic device, characterized in that: The electronic device includes one or more processors and one or more memories, wherein the one or more memories store at least one program code, and the at least one program code is loaded and executed by the one or more processors to implement the operations performed by the method according to any one of claims 1 to 7.

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