Automobile power system impact test method, device, equipment and storage medium

Abstract

The application discloses a kind of automobile power system impact test method, device, equipment and storage medium, it is related to impact test technical field, including the impact parameter of the impact that test vehicle is subjected to under all test conditions and the occurrence probability of each test condition;According to the occurrence probability of each test condition and preset test number, determine the test number corresponding to each test condition;According to the test number of each test condition, test sequence is randomly generated;According to impact parameter and test sequence, impact test is carried out to test vehicle.The application uses the impact parameter of the impact that test vehicle is subjected to under each test condition and the test sequence randomly generated to carry out impact test to test vehicle, can more truly simulate actual situation on the road of test vehicle, to improve the authenticity and effectiveness of test result, solve the technical problem that test vehicle cannot accurately reflect mechanical performance fatigue degree after impact test.

Description

Technical Field

[0001] This invention relates to the field of impact testing technology, and in particular to a method, apparatus, equipment and storage medium for impact testing of automotive power systems. Background Technology

[0002] The powertrain system for new energy vehicles is a crucial technological route for commercial vehicles. The three core components of a new energy vehicle powertrain system include the power battery, drive motor, and motor controller. Currently, during the automotive R&D phase, mechanical shock tests are typically conducted on the powertrain system to evaluate its shock resistance and stability, facilitating the design and improvement of new energy vehicles.

[0003] Currently, impact tests of power systems are mainly conducted through impact test benches. However, the impact parameters and number of tests are fixed and cannot simulate mechanical impact loads under real-world conditions. As a result, the test vehicles after impact tests cannot accurately reflect the degree of mechanical fatigue. Summary of the Invention

[0004] The main objective of this invention is to provide a method, apparatus, equipment, and storage medium for impact testing of automotive power systems, aiming to solve the technical problem that test vehicles after impact testing cannot accurately reflect the degree of mechanical fatigue.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] In a first aspect, the present invention provides an impact test for an automotive powertrain system, which obtains the impact parameters of the test vehicle under all test conditions and the probability of occurrence of each test condition.

[0007] The number of tests corresponding to each test condition is determined based on the occurrence probability of each test condition and the preset number of tests.

[0008] Based on the number of tests for each test condition, a test sequence is randomly generated;

[0009] The test vehicle is subjected to an impact test based on the impact parameters and the test sequence.

[0010] Optionally, in the above-mentioned automotive powertrain impact test, the step of obtaining the impact parameters of the test vehicle under all test conditions includes:

[0011] Obtain the acceleration power spectral density curve of the test vehicle under the target test conditions;

[0012] Based on the acceleration power spectral density curve, the impact frequency, impact acceleration amplitude, and pulse direction of the impact experienced by the test under the target test conditions are obtained.

[0013] Optionally, in the above-mentioned automotive powertrain impact test, there are at least two acceleration power spectral density curves;

[0014] The step of obtaining the impact parameters of the test vehicle under all test conditions also includes:

[0015] The test frequency is obtained based on all the impact frequencies;

[0016] The test acceleration amplitude is obtained based on all impact acceleration amplitudes;

[0017] The step of conducting an impact test on the test vehicle based on the impact parameters and the test sequence includes:

[0018] The test vehicle is subjected to an impact test based on the test frequency, the test acceleration amplitude, the pulse direction, and the test sequence.

[0019] Optionally, in the above-mentioned automotive powertrain impact test, the step of determining the number of tests corresponding to each test condition based on the probability of occurrence of each test condition and the preset number of tests includes:

[0020] Obtain the daily impact frequency threshold and preset test time;

[0021] The preset number of tests is obtained based on the daily impact frequency threshold and the preset test time;

[0022] Calculate the product of the preset number of tests and each of the test conditions to determine the number of tests for each test condition within the preset test time.

[0023] Optionally, in the above-mentioned automotive powertrain impact test, the step of randomly generating a test sequence based on the number of tests for each test condition includes:

[0024] Based on the number of tests for each test condition within a preset test time, a set of impact conditions is generated within the preset test time, wherein the total number of elements in the set of impact conditions is equal to the preset number of tests.

[0025] The elements in the set of test conditions are randomly sorted to obtain the test sequence.

[0026] Optionally, in the above-mentioned vehicle powertrain impact test, the test conditions include the overall loading condition, the overall unloading condition, the overall pothole condition, the overall manhole cover condition, and the overall speed bump condition.

[0027] Optionally, in the above-mentioned vehicle powertrain impact test, the total loading condition includes several loading sub-conditions with different loads;

[0028] The overall unloading condition includes several unloading sub-conditions with different loads;

[0029] The total pothole condition includes several sub-pothole conditions that are combinations of different pothole areas, vehicle speeds, and / or pothole depths.

[0030] The total working conditions of the manhole cover include several working conditions of the manhole cover, which are combinations of different vehicle speeds, manhole cover heights and / or relative positions of the manhole covers;

[0031] The total operating conditions for speed bumps include speed bump conditions at different vehicle speeds.

[0032] Secondly, the present invention provides an impact testing apparatus for an automotive powertrain system, the apparatus comprising:

[0033] The data acquisition module is used to acquire the impact parameters of the test vehicle under all test conditions and the probability of occurrence of each test condition.

[0034] The data processing module is used to determine the number of tests corresponding to each test condition based on the occurrence probability of each test condition and the preset number of tests.

[0035] The sequence generation module is used to randomly generate test sequences based on the number of tests for each test condition;

[0036] The test module is used to conduct an impact test on the test vehicle according to the impact parameters and the test sequence.

[0037] Thirdly, the present invention provides an impact testing device, which includes a processor and a memory. The memory stores an impact testing program, and when the impact testing program is executed by the processor, it implements the impact testing method as described above.

[0038] Fourthly, the present invention provides a computer-readable storage medium storing a computer program that, when executed by one or more processors, implements the impact testing method described above.

[0039] The above-described one or more technical solutions provided by this invention can have the following advantages or at least achieve the following technical effects:

[0040] This invention proposes a method, apparatus, equipment, and storage medium for impact testing of automotive powertrain systems. By acquiring the impact parameters of the test vehicle under all test conditions and the probability of occurrence of each test condition, and using these impact parameters as input parameters for the impact experiment, it can realistically simulate the actual road conditions of the test vehicle, improving the authenticity and effectiveness of the test results. Based on the probability of occurrence of each test condition and a preset number of tests, the number of tests corresponding to each test condition is determined. Using the preset number of tests, tests can be completed for the target stage of the test vehicle's life cycle, facilitating user assessment of the mechanical performance fatigue level of the test vehicle at the target stage, thus offering the advantage of wide applicability. Based on the number of tests for each test condition, a test sequence is randomly generated. Impact tests are then conducted on the test vehicle according to the impact parameters and the test sequence. Using randomly generated test sequences for impact testing more realistically simulates the actual road conditions of the test vehicle, further improving the authenticity and effectiveness of the test results and addressing the technical problem that impact tests cannot accurately reflect the degree of mechanical performance fatigue. Attached Figure Description

[0041] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0042] Figure 1 This is a schematic flowchart of the first embodiment of the impact test for the automotive powertrain system of the present invention;

[0043] Figure 2 This is a schematic diagram of the hardware structure of the automotive powertrain impact testing equipment involved in the present invention;

[0044] Figure 3 This is a functional module diagram of the first embodiment of the automotive powertrain impact testing device of the present invention.

[0045] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0046] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0047] It should be noted that in the embodiments of the present invention, all directional indications (such as up, down, left, right, front, back, etc.) are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0048] In this invention, the terms "comprising," "including," or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or system. Without further limitation, an element defined by the phrase "comprising..." does not exclude the presence of other identical elements in the process, method, article, or system that includes that element. Furthermore, the meaning of "and / or" throughout the text includes three parallel options; for example, "A and / or B" includes option A, option B, or options where both A and B are satisfied.

[0049] In this invention, unless otherwise explicitly specified and limited, the terms "connection" and "fixed" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral part; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements.

[0050] In this invention, the use of suffixes such as "module," "part," or "unit" to denote elements is solely for the purpose of illustrative purposes and has no specific meaning in itself. Therefore, "module," "part," or "unit" can be used interchangeably.

[0051] For those skilled in the art, the specific meanings of the above terms in this invention can be understood according to the specific circumstances. Furthermore, the technical solutions of the various embodiments can be combined with each other; however, this is based on the premise that those skilled in the art can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0052] Example 1

[0053] Reference Figure 1 The flowchart illustrates the first embodiment of the impact test method for automotive power systems of the present invention, which is applied to impact test equipment.

[0054] Impact testing equipment refers to terminal devices or network devices that can achieve network connectivity. Impact testing equipment can be terminal devices such as mobile phones, computers, tablets, and embedded industrial control computers, or network devices such as servers and cloud platforms.

[0055] like Figure 2 The diagram shown is a schematic of the hardware structure of an impact testing device. The impact testing device may include: a processor 1001, such as a CPU (Central Processing Unit), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005.

[0056] Those skilled in the art will understand that Figure 2 The hardware structure shown does not constitute a limitation on the impact testing equipment of the present invention, and may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0057] Specifically, the communication bus 1002 is used to realize the connection and communication between these components;

[0058] User interface 1003 is used to connect to the client and communicate data with the client. User interface 1003 may include output units, such as a display screen, and input units, such as a keyboard.

[0059] The network interface 1004 is used to connect to the backend server and communicate data with the backend server. The network interface 1004 may include input / output interfaces, such as standard wired interfaces and wireless interfaces, such as Wi-Fi interfaces.

[0060] The memory 1005 is used to store various types of data, which may include, for example, instructions for any application or method in the impact testing equipment, as well as application-related data. The memory 1005 may be a high-speed RAM or a stable memory, such as a disk storage device. Optionally, the memory 1005 may also be a storage device independent of the processor 1001. (Continuing with the previous section...) Figure 2 The memory 1005 may include an operating system, a network communication module, a user interface module, and an impact test program;

[0061] The processor 1001 is used to call the impact test program stored in the memory 1005 and perform the following operations:

[0062] Obtain the impact parameters of the test vehicle under all test conditions and the probability of occurrence of each test condition;

[0063] The number of tests corresponding to each test condition is determined based on the occurrence probability of each test condition and the preset number of tests.

[0064] Based on the number of tests for each test condition, a test sequence is randomly generated;

[0065] The test vehicle is subjected to an impact test based on the impact parameters and the test sequence.

[0066] Based on the impact testing equipment described above, the following will be combined with... Figure 1 The flowchart shown provides a detailed description of the automotive powertrain impact test in this embodiment. The method may include the following steps:

[0067] Step S10: Obtain the impact parameters of the test vehicle under all test conditions and the probability of occurrence of each test condition.

[0068] Specifically, the impact parameters include the dominant frequency, acceleration amplitude, and pulse direction. The impact parameters can be obtained by pre-setting, specifically by deploying a real-world working scenario and measuring the actual impact by placing a triaxial accelerometer on the test vehicle, or by obtaining them through computer simulation. In one example, the test vehicle is an urban logistics vehicle, and its mechanical impact load is mainly manifested as the -Z direction impact generated during loading, the +Z direction impact generated during unloading, and the mechanical impact generated by passing through potholes, manhole covers, speed bumps, etc. during urban road driving.

[0069] Furthermore, the test conditions may include the overall loading condition, the overall unloading condition, the overall pothole condition, the overall manhole cover condition, and the overall speed bump condition.

[0070] Optionally, the total loading condition includes several loading sub-conditions with different loads; the total unloading condition includes several unloading sub-conditions with different loads; the total pothole condition includes several pothole sub-conditions composed of combinations of different pothole areas, vehicle speeds, and / or pothole depths; the total manhole cover condition includes several manhole cover conditions composed of combinations of different vehicle speeds, manhole cover heights, and / or relative positions of manhole covers; and the total speed bump condition includes speed bump sub-conditions with different vehicle speeds.

[0071] The probability of occurrence for each test condition can be preset. Taking the total speed bump test condition as an example, assuming the maximum speed of urban logistics vehicles is 100 km / h, the total speed bump test condition can include sub-conditions at speeds of 20 km / h, 30 km / h, 40 km / h, 50 km / h, 60 km / h, 70 km / h, 80 km / h, 90 km / h, and 100 km / h. It is assumed that the vehicle speed follows a normal distribution (μ, σ). 2 By calculation, the probabilities of occurrence of the 20km / h, 30km / h, 40km / h, 50km / h, 60km / h, 70km / h, 80km / h, 90km / h, and 100km / h speed bump sub-conditions in the total speed bump conditions can be obtained. Assuming that the total loading, unloading, pothole, manhole cover, and speed bump conditions follow a uniform distribution, the probability of occurrence of the total speed bump condition is calculated. Based on the probability of occurrence of the total speed bump condition and the probability of the speed bump sub-condition within the total speed bump condition, the probability of occurrence of the speed bump sub-condition in all conditions can be obtained.

[0072] Step S20: Determine the number of tests corresponding to each test condition based on the occurrence probability of each test condition and the preset number of tests.

[0073] Specifically, the number of tests corresponding to each test condition can be determined by multiplying the probability of occurrence of each test condition by the preset number of tests.

[0074] Step S30: Randomly generate a test sequence based on the number of tests for each test condition;

[0075] Step S40: Conduct an impact test on the test vehicle according to the impact parameters and the test sequence.

[0076] The automotive powertrain impact test method of this embodiment obtains the impact parameters of the test vehicle under all test conditions and the probability of occurrence of each test condition; determines the number of tests corresponding to each test condition based on the probability of occurrence of each test condition and the preset number of tests; randomly generates a test sequence based on the number of tests for each test condition; and conducts impact tests on the test vehicle according to the impact parameters and the test sequence. This invention uses the impact parameters of the test vehicle under each test condition as the input parameters for the impact experiment, which can realistically simulate the actual road conditions of the test vehicle and improve the authenticity and effectiveness of the test results. At the same time, by using the preset number of tests, tests can be completed for the target stage of the test vehicle's life cycle, so that users can evaluate the mechanical performance fatigue level of the test vehicle at the target stage, which has the advantage of wide applicability. It is worth noting that this invention also uses randomly generated test sequences to conduct impact tests on the test vehicle, which can more realistically simulate the actual road conditions of the test vehicle, thereby further improving the authenticity and effectiveness of the test results.

[0077] Furthermore, step S10 specifically includes:

[0078] Step S101: Obtain the acceleration power spectral density curve of the test vehicle under the target test conditions;

[0079] Step S102: Based on the acceleration power spectral density curve, obtain the impact frequency, impact acceleration amplitude, and pulse direction of the impact experienced by the test under the target test conditions.

[0080] Specifically, a Fourier transform is performed on the acceleration power spectral density curve to extract the impact frequency, impact acceleration amplitude, and pulse direction.

[0081] In one example, the acceleration power spectral density curves are at least two;

[0082] Step S102 further includes:

[0083] The test frequency is obtained based on all impact frequencies; the test acceleration amplitude is obtained based on all impact acceleration amplitudes.

[0084] Specifically, the average value of all impulse frequencies is calculated and used as the test frequency;

[0085] Calculate the average of all impact acceleration amplitudes as the quasi-test acceleration amplitude;

[0086] Calculate the Type A standard uncertainty The formula is as follows:

[0087]

[0088] Where n is the number of impact acceleration amplitudes, x i For any impact acceleration amplitude, To accurately measure the acceleration amplitude;

[0089] Determine the Type B uncertainty caused by the allowable error of the accelerometer. The formula is as follows:

[0090]

[0091] Where a1 is the allowable error and k1 is the coverage factor;

[0092] Determine the Type B uncertainty caused by the allowable error of the accelerometer. The formula is as follows:

[0093]

[0094] Where a2 is the allowable error and k2 is the coverage factor;

[0095] Combined standard uncertainty u c The formula is as follows:

[0096]

[0097] The expanded uncertainty U is given by the following formula:

[0098] U=k3* c

[0099] Where k3 is the inclusion factor;

[0100] Calculate the test acceleration amplitude u d The formula is as follows:

[0101]

[0102] In this example, step S40 specifically includes: conducting an impact test on the test vehicle based on the test main frequency, the test acceleration amplitude, the pulse direction, and the test sequence.

[0103] Further, step S20 may include:

[0104] Step S201: Obtain the daily impact frequency threshold and preset test time;

[0105] Step S202: Obtain the preset number of tests based on the daily impact number threshold and the preset test time;

[0106] Step S203: Calculate the product of the preset number of tests and each of the test conditions, and confirm the number of tests for each test condition within the preset test time.

[0107] Further, step S30 may include:

[0108] Step S301: Based on the number of tests for each test condition within the preset test time, generate a set of impact conditions within the preset test time, wherein the total number of elements in the set of impact conditions is equal to the preset number of tests.

[0109] Step S302: Randomly sort the elements in the test condition set to obtain the test sequence.

[0110] Example 2

[0111] Based on the same inventive concept, referring to Figure 3 The present invention provides a first embodiment of the automotive powertrain impact testing device, which can be a virtual device and applied to impact testing equipment.

[0112] The following is combined Figure 3 The functional module diagram shown illustrates the automotive powertrain impact testing device provided in this embodiment in detail. The device may include:

[0113] The data acquisition module is used to acquire the impact parameters of the test vehicle under all test conditions and the probability of occurrence of each test condition.

[0114] The data processing module is used to determine the number of tests corresponding to each test condition based on the occurrence probability of each test condition and the preset number of tests.

[0115] The sequence generation module is used to randomly generate test sequences based on the number of tests for each test condition;

[0116] The test module is used to conduct an impact test on the test vehicle according to the impact parameters and the test sequence.

[0117] It should be noted that the functions and corresponding technical effects of each module in the automotive powertrain impact test device provided in this embodiment can be referred to the description of the specific implementation methods in the various embodiments of the automotive powertrain impact test of this invention. For the sake of brevity, they will not be repeated here.

[0118] Example 4

[0119] Based on the same inventive concept, referring to Figure 2 The hardware structure diagram shows that this embodiment provides an impact testing device, which may include a processor and a memory. The memory stores an impact testing program. When the impact testing program is executed by the processor, it implements all or part of the steps of the various embodiments of the impact test of the automotive power system of the present invention.

[0120] Specifically, impact testing equipment refers to terminal devices or network devices that can achieve network connectivity. These can be terminal devices such as mobile phones, computers, tablets, and portable computers, or network devices such as servers and cloud platforms.

[0121] It is understood that impact testing equipment may also include a communication bus, a user interface, and a network interface. The communication bus is used to establish communication between these components; the user interface is used to connect to clients and communicate data with them, and may include output units such as a display screen and input units such as a keyboard; the network interface is used to connect to a backend server and communicate data with it, and may include input / output interfaces such as standard wired or wireless interfaces.

[0122] The memory is used to store various types of data, which may include, for example, instructions for any application or method in the impact testing equipment, as well as application-related data. The memory can be implemented using any type of volatile or non-volatile storage device or a combination thereof, such as Static Random Access Memory (SRAM), Random Access Memory (RAM), Electrically Erasable Programmable Read-Only Memory (EEPROM), Erasable Programmable Read-Only Memory (EPROM), Programmable Read-Only Memory (PROM), Read-Only Memory (ROM), magnetic storage, flash memory, magnetic disk, or optical disk. Optionally, the memory can also be a processor-independent storage device.

[0123] The processor is used to call the impact test program stored in the memory and execute the automotive powertrain impact test as described above. The processor can be an application-specific integrated circuit (ASIC), a digital signal processor (DSP), a digital signal processing device (DSPD), a programmable logic device (PLD), a field-programmable gate array (FPGA), a controller, a microcontroller, a microprocessor, or other electronic components, and is used to execute all or part of the steps of the various embodiments of the automotive powertrain impact test described above.

[0124] Example 5

[0125] Based on the same inventive concept, this embodiment provides a computer-readable storage medium, such as flash memory, hard disk, multimedia card, card-type memory (e.g., SD or DX memory), random access memory (RAM), static random access memory (SRAM), read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), magnetic memory, disk, optical disk, server, etc. The storage medium stores a computer program that can be executed by one or more processors. When the computer program is executed by the processor, it can implement all or part of the steps of the various embodiments of the automotive powertrain impact test of the present invention.

[0126] It should be noted that the sequence numbers of the above embodiments of the present invention are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments. The above embodiments are only optional embodiments of the present invention and do not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made under the inventive concept of the present invention using the content of the present invention's specification and drawings, or direct or indirect applications in other related technical fields, are all included within the patent protection scope of the present invention.

Claims

1. A method for impact testing of an automotive powertrain system, characterized in that, The method includes: The impact parameters of the test vehicle under all test conditions and the probability of occurrence of each test condition are obtained. The step of obtaining the impact parameters of the test vehicle under all test conditions includes: obtaining the acceleration power spectral density curve of the test vehicle under the target test condition; and obtaining the impact frequency, impact acceleration amplitude and pulse direction of the impact of the test vehicle under the target test condition based on the acceleration power spectral density curve. The number of tests corresponding to each test condition is determined based on the occurrence probability of each test condition and the preset number of tests. A test sequence is randomly generated based on the number of tests for each test condition. The step of randomly generating a test sequence based on the number of tests for each test condition includes: generating a set of impact conditions within a preset test time based on the number of tests for each test condition within a preset test time, wherein the total number of elements in the set of impact conditions is equal to the preset number of tests; and randomly sorting the elements in the set of test conditions to obtain a test sequence. The test vehicle is subjected to an impact test based on the impact parameters and the test sequence.

2. The impact test method for automotive powertrain systems as described in claim 1, characterized in that, The acceleration power spectral density curves shall be at least two; The step of obtaining the impact parameters of the test vehicle under all test conditions also includes: The test frequency is obtained based on all the impact frequencies; The test acceleration amplitude is obtained based on all impact acceleration amplitudes; The step of conducting an impact test on the test vehicle based on the impact parameters and the test sequence includes: The test vehicle is subjected to an impact test based on the test frequency, the test acceleration amplitude, the pulse direction, and the test sequence.

3. The impact test method for automotive powertrain systems as described in claim 1, characterized in that, The steps for determining the number of tests corresponding to each test condition based on the occurrence probability of each test condition and the preset number of tests include: Obtain the daily impact frequency threshold and preset test time; The preset number of tests is obtained based on the daily impact frequency threshold and the preset test time; Calculate the product of the preset number of tests and each of the test conditions to determine the number of tests for each test condition within the preset test time.

4. The method for impact testing of automotive powertrain systems as described in claim 1, characterized in that, The test conditions include the overall loading condition, the overall unloading condition, the overall pothole condition, the overall manhole cover condition, and the overall speed bump condition.

5. The impact test method for automotive powertrain systems as described in claim 4, characterized in that, The overall loading condition includes several loading sub-conditions with different loads; The overall unloading condition includes several unloading sub-conditions with different loads; The total pothole condition includes several sub-pothole conditions that are combinations of different pothole areas, vehicle speeds, and / or pothole depths. The total working conditions of the manhole cover include several working conditions of the manhole cover, which are combinations of different vehicle speeds, manhole cover heights and / or relative positions of the manhole covers; The total operating conditions for speed bumps include speed bump conditions at different vehicle speeds.

6. An impact testing device for an automotive powertrain system, characterized in that, The apparatus, used in any one of claims 1 to 5, comprises: The data acquisition module is used to acquire the impact parameters of the test vehicle under all test conditions and the probability of occurrence of each test condition. The data processing module is used to determine the number of tests corresponding to each test condition based on the occurrence probability of each test condition and the preset number of tests. The sequence generation module is used to randomly generate test sequences based on the number of tests for each test condition; The test module is used to conduct an impact test on the test vehicle according to the impact parameters and the test sequence.

7. An impact testing device for automotive powertrain systems, characterized in that, The device includes a processor and a memory, the memory storing an impact test program, which, when executed by the processor, implements the impact test method as described in any one of claims 1 to 5.

8. A computer-readable storage medium, characterized in that, The storage medium stores a computer program, which, when executed by one or more processors, implements the impact testing method as described in any one of claims 1 to 5.

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