Vehicle active and passive integrated safety simulation test method, medium and equipment

Abstract

The invention relates to a vehicle active and passive integrated safety simulation test method, medium and equipment, and the method comprises the following steps: S1, obtaining preset simulation environment parameters and test requirements, and constructing a virtual simulation environment; s2, according to test requirements, test parameters of the simulation vehicle and test parameters of the virtual character are determined, initial parameters of the simulation vehicle and the virtual character in the virtual simulation environment are updated respectively, and state parameters of the simulation vehicle comprise control system parameters and state structure parameters of the simulation vehicle; s3, obtaining the state parameters of the virtual character and the state parameters of the simulation vehicle after the preset time; s4, analyzing the state parameters obtained in the S3 after preprocessing to determine a safety performance analysis result of the simulation vehicle within a preset time; and S5, according to the analysis result, updating the state parameter of the simulation vehicle to enable the first analysis result to reach a preset value so as to obtain the active and passive safety performance of the simulation vehicle. The safety performance of the active and passive systems of the vehicle can be tested simultaneously.

Description

Technical Field

[0001] The present invention relates to the field of automobile testing, and in particular to a vehicle active and passive integrated safety simulation testing method, medium and equipment. Background Art

[0002] With the rapid development of the automotive industry, the improvement of vehicle safety performance has become a global focus. Traditional vehicle safety testing mainly relies on actual road testing and physical model experiments. Although these methods can evaluate the safety performance of vehicles to a certain extent, they also have many limitations. First, actual road testing is time-consuming, costly, and difficult to cover all possible driving scenarios and potential dangerous situations. Secondly, although physical model experiments can simulate collision scenarios to a certain extent, they have poor flexibility and cannot quickly adjust test parameters to adapt to different test requirements. In addition, active safety systems and passive safety systems usually need to be tested separately, which makes it impossible to achieve a comprehensive evaluation of the overall safety performance of the vehicle. These problems not only limit the efficiency of the test, but also affect the comprehensiveness and accuracy of the test results.

[0003] In actual road testing, testers need to drive vehicles on real roads to simulate various possible collision scenarios, which is not only dangerous, but also difficult to control the test environment. For example, factors such as weather conditions and traffic flow will affect the test results. In addition, actual road testing requires a lot of time and manpower investment, and the testing cost is high. Although physical model experiments can be carried out in laboratory environments, the scenarios they simulate are relatively limited and cannot fully restore the complex situations in real collision processes. For example, the dynamic behavior of the vehicle during a collision and the stress conditions of the occupants are difficult to accurately simulate through physical model experiments.

[0004] With the continuous development of automobile intelligence and autonomous driving technology, the complexity of vehicle safety systems is also increasing. Modern cars are not only equipped with traditional passive safety systems such as airbags and seat belts, but also integrate a variety of active safety systems such as automatic emergency braking and lane keeping assist. These active safety systems need to make real-time decisions in complex traffic environments to prevent accidents or reduce the severity of accidents. Therefore, traditional testing methods can no longer meet the needs of modern automobile safety testing, and a more efficient, comprehensive and accurate testing method is needed to evaluate the overall safety performance of the vehicle. Summary of the invention

[0005] The purpose of the present invention is to provide a vehicle active and passive integrated safety simulation test method, medium and equipment to solve the problem that the test results in the prior art are not comprehensive enough.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0007] A vehicle active and passive integrated safety simulation test method comprises the following steps:

[0008] S1: constructing a virtual simulation environment according to initial state parameters of the simulation vehicle and initial state parameters of the virtual character, wherein the virtual simulation environment includes a moving simulation vehicle and a moving virtual character;

[0009] S2: replacing the initial state parameters of the simulated vehicle and the initial state parameters of the virtual character in the virtual simulation environment respectively according to the test parameters of the simulated vehicle and the test parameters of the virtual character in the preset test requirements, wherein the test parameters of the simulated vehicle include the control system parameters of the simulated vehicle and the state structure parameters of the simulated vehicle;

[0010] S3: After the virtual simulation environment runs for a preset time, the state parameters of the virtual character and the state parameters of the simulation vehicle are obtained;

[0011] S4: preprocessing the state parameters of the virtual character and the state parameters of the simulated vehicle obtained in S3, and analyzing the preprocessed state parameters of the virtual character and the state parameters of the simulated vehicle to obtain the safety system analysis and scoring result of the simulated vehicle within the preset time;

[0012] S5: According to the safety system analysis and scoring result, the state parameters of the simulated vehicle are updated, and steps S3-S4 are repeated until the safety system analysis and scoring result reaches a preset value, and the updating of the state parameters of the simulated vehicle is stopped, and the safety system analysis and scoring result and the state parameters of the simulated vehicle that reach the preset value are obtained to determine the active and passive safety system performance of the simulated vehicle.

[0013] According to the above technical means, the preset simulation environment parameters and test requirements are obtained, and the collision test between the vehicle and the pedestrian is carried out in the virtual scene. In the virtual scene, the parameters of the simulation vehicle and the simulation environment can be dynamically adjusted according to the test requirements, making the entire test process more flexible and repeatable.

[0014] The state parameters of the simulated vehicle include the structural state parameters of the body of the simulated vehicle and the control system parameters of the simulated vehicle, wherein the structural state parameters of the body of the simulated vehicle represent the passive safety system of the simulated vehicle, and the control system parameters of the simulated vehicle represent the active safety system of the simulated vehicle, and the analysis results include the safety system performance analysis of the passive safety system of the simulated vehicle and the active safety system performance analysis of the simulated vehicle, so that the safety performance of the active safety system and the passive safety system of the simulated vehicle can be tested separately or simultaneously according to the situation of the simulated vehicle and the virtual character during the collision process. The entire test is carried out in a virtual environment. Compared with the traditional on-site vehicle test, the environment of the test process can be changed by adjusting the virtual environment parameters, and the parameters of the vehicle-mounted control system and the body structure can be adjusted to optimize the active and passive safety system performance of the simulated vehicle, which not only makes the test environment coverage wider during the test process, but also makes the test process more comprehensive and the test results more accurate.

[0015] Further, the safety system analysis and scoring results of the simulated vehicle in S4 include analysis and scoring results of the active safety performance of the simulated vehicle and analysis and scoring results of the passive safety performance of the simulated vehicle, wherein the analysis and scoring results of the passive safety performance of the simulated vehicle are the first analysis and scoring results, and the analysis and scoring results of the active safety performance of the simulated vehicle are the second analysis and scoring results.

[0016] According to the above technical means, by dividing the safety system analysis results of the simulation vehicle into two parts: active safety performance and passive safety performance, the overall safety performance of the vehicle can be comprehensively evaluated, and richer data support can be provided, so that the effectiveness of the vehicle safety system can be evaluated from the two dimensions of active safety performance and passive safety performance.

[0017] Further, the acquisition of the first analysis result in S4 specifically includes the following steps:

[0018] S41: determining collision parameters between the simulated vehicle and the virtual character in the virtual simulation environment from the preprocessed state parameters of the virtual character and the state structure parameters of the simulated vehicle, wherein the collision parameters at least include deformation parameters of the front structure of the simulated vehicle;

[0019] S42: determining the damage result of the front structure of the simulated vehicle to the virtual character according to the deformation parameters of the front structure of the simulated vehicle, so as to obtain a damage scoring result of the front structure of the simulated vehicle to the virtual character, wherein the damage scoring result is the first analysis scoring result.

[0020] According to the above technical means, the damage result of the front structure of the simulated vehicle to the virtual character is determined by the deformation parameters of the front structure of the simulated vehicle, and the performance of the passive safety system of the simulated vehicle under the test scenario can be obtained by analyzing the structural deformation parameters of the contact part between the simulated vehicle and the virtual character. The structural deformation parameters of the simulated vehicle and the damage result of the virtual character are combined to obtain the damage result of the simulated vehicle structure to the virtual character, so that the damage result is more comprehensive and accurate.

[0021] Further, in S5, the state parameters of the simulation vehicle are updated according to the safety system analysis and scoring result, which specifically includes:

[0022] According to the first analysis result, the deformation parameters of the front structure of the simulated vehicle that need to be adjusted are determined, and the state structure parameters of the simulated vehicle are replaced according to the deformation parameters of the front structure of the simulated vehicle that need to be adjusted.

[0023] According to the above technical means, by dynamically updating the deformation parameters of the front structure of the simulated vehicle, the behavior of the vehicle during the collision can be more accurately simulated, thereby improving the accuracy and reliability of the simulation and providing test results that are closer to actual accidents.

[0024] Furthermore, the damage results of the front structure of the simulated vehicle on the virtual character at least include head damage, lower limb damage and chest damage of the virtual character.

[0025] According to the above technical means, by clarifying that the damage results of the simulated vehicle on the virtual character at least include head injury, lower limb injury and chest injury, the injury assessment of the virtual character is more comprehensive, and at the same time it can more accurately reflect the various types of injuries that the human body may suffer in a collision accident, thereby providing detailed data support for the design and optimization of the passive safety system of the simulated vehicle.

[0026] Further, obtaining the second analysis result specifically includes the following steps:

[0027] S43: acquiring the position parameters and speed parameters of the simulated vehicle in the virtual simulation environment and the position parameters and speed parameters of the virtual character from the state parameters of the virtual character and the state parameters of the simulated vehicle, so as to acquire the state and position relationship between the simulated vehicle and the virtual character;

[0028] S44: Analyze the collision risk information of the simulated vehicle and the virtual character according to the position parameters and speed parameters of the simulated vehicle and the position parameters and speed parameters of the virtual character, and analyze the collision risk information to obtain a collision risk information scoring result, which is the second analysis scoring result.

[0029] According to the above technical means, by obtaining the position parameters and speed parameters of the simulated vehicle and the virtual character, the relative position and motion state between the simulated vehicle and the virtual character can be analyzed in advance, so as to evaluate the collision risk; the state parameters of the operation of the simulated vehicle in the virtual simulation environment are obtained from the state parameters of the simulated vehicle, and the state parameters of the operation of the virtual character in the virtual simulation environment are obtained from the state parameters of the virtual character, and the state parameters of the operation of the simulated vehicle and the state parameters of the operation of the virtual character are analyzed.

[0030] Further, according to the safety system analysis and scoring result, the state parameters of the simulation vehicle are updated, specifically including:

[0031] According to the second analysis result, the control parameters that need to be adjusted in the control system parameters of the simulated vehicle are determined, so that the control system updates the speed parameters of the simulated vehicle according to the control parameters.

[0032] According to the above technical means, by analyzing the position and speed parameters of the simulated vehicle and the virtual character, the interaction between the simulated vehicle and the virtual character in the virtual simulation environment can be more comprehensively evaluated. The degree of change of the operating state of the simulated vehicle by the control system of the simulated vehicle during the operation of the simulated vehicle can be analyzed to test the performance of the control system, that is, the performance of the active safety system of the simulated vehicle.

[0033] Furthermore, the preprocessing in S4 includes data cleaning, data normalization and data classification.

[0034] According to the above technical means, through the data cleaning step, the erroneous, missing or unreasonable data points generated in the simulation process can be identified and eliminated, so that the state parameters of the virtual character and the state parameters of the simulated vehicle after the preset time after data cleaning are more accurate and reliable; different types of data are normalized so that they can be compared and analyzed on the same scale; the state parameters of the virtual character and the state parameters of the simulated vehicle after the preset time are classified according to different indicators, which simplifies the analysis process and makes the analysis results more accurate.

[0035] Furthermore, a computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the virtual simulation method for vehicle active and passive integrated safety testing is implemented.

[0036] Furthermore, an electronic device includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the above-mentioned method for virtual simulation of active and passive integrated safety testing of a vehicle when executing the program.

[0037] Beneficial effects of the present invention:

[0038] 1. Obtain preset simulation environment parameters and test requirements, conduct collision tests between vehicles and pedestrians in virtual scenes, and dynamically adjust the parameters of the simulation vehicle and the simulation environment according to the test requirements in the virtual scene, making the entire test process more flexible and repeatable.

[0039] 2. The state parameters of the simulated vehicle include structural state parameters of the body of the simulated vehicle and control system parameters of the simulated vehicle, wherein the structural state parameters of the body of the simulated vehicle represent the passive safety system of the simulated vehicle, and the control system parameters of the simulated vehicle represent the active safety system of the simulated vehicle, and the analysis results include safety system performance analysis of the passive safety system of the simulated vehicle and / or performance analysis of the active safety system of the simulated vehicle, so that during a collision process, the safety performance of the active safety system and / or the passive safety system of the simulated vehicle can be tested separately or simultaneously according to the simulated conditions of the simulated vehicle and the virtual character.

[0040] 3. The entire test is carried out in a virtual environment. Compared with the traditional on-site vehicle test, the test environment can be changed by adjusting the virtual environment parameters, and the parameters of the vehicle control system and body structure can be adjusted to optimize the active and passive safety system performance of the simulated vehicle. This not only makes the test environment coverage wider during the test, but also makes the test process more comprehensive and the test results more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 This is a specific flow chart of the first embodiment of the present invention.

[0042] Figure 2 This is a flowchart of a specific implementation of the first embodiment of the present invention;

[0043] Figure 3 This is a specific flow chart of obtaining analysis results according to the first embodiment of the present invention. DETAILED DESCRIPTION

[0044] The following will refer to the accompanying drawings and preferred embodiments to illustrate the embodiments of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be understood that the preferred embodiments are only for illustrating the present invention, not for limiting the scope of protection of the present invention. It should be noted that the illustrations provided in the following embodiments only illustrate the basic concept of the present invention in a schematic manner, so the drawings only show the components related to the present invention rather than drawing according to the number, shape and size of the components in the actual implementation. The type, quantity and proportion of each component in the actual implementation can be a random change, and the component layout type may also be more complicated.

[0045] Embodiment 1

[0046] like Figure 1 As shown, this embodiment proposes a vehicle active and passive integrated safety simulation test method, which includes the following steps:

[0047] S1: constructing a virtual simulation environment according to initial state parameters of the simulation vehicle and initial state parameters of the virtual character, wherein the virtual simulation environment includes a moving simulation vehicle and a moving virtual character;

[0048] S2: replacing initial state parameters of the simulated vehicle and initial state parameters of the virtual character in the virtual simulation environment respectively according to the test parameters of the simulated vehicle and the test parameters of the virtual character in the preset test requirements, wherein the test parameters of the simulated vehicle include control system parameters of the simulated vehicle and state structure parameters of the simulated vehicle;

[0049] S3: After the virtual simulation environment runs for a preset time, the state parameters of the virtual character and the state parameters of the simulation vehicle are obtained;

[0050] S4: preprocessing the state parameters of the virtual character and the state parameters of the simulated vehicle obtained in S3, and analyzing the preprocessed state parameters of the virtual character and the state parameters of the simulated vehicle to obtain a safety system analysis score result of the simulated vehicle within a preset time;

[0051] S5: Update the state parameters of the simulated vehicle according to the safety system analysis scoring result, and repeat steps S3-S4 until the safety system analysis scoring result reaches a preset value, stop updating the state parameters of the simulated vehicle, and obtain the safety system analysis scoring result and the state parameters of the simulated vehicle that reach the preset value to determine the active and passive safety system performance of the simulated vehicle.

[0052] Obtain preset simulation environment parameters and test requirements, conduct collision tests between vehicles and pedestrians in virtual scenes, and dynamically adjust the parameters of the simulation vehicle and the simulation environment according to the test requirements in the virtual scene, making the entire test process more flexible and repeatable.

[0053] The state parameters of the simulated vehicle include structural state parameters of the body of the simulated vehicle and control system parameters of the simulated vehicle, wherein the structural state parameters of the body of the simulated vehicle represent the passive safety system of the simulated vehicle, and the control system parameters of the simulated vehicle represent the active safety system of the simulated vehicle. The analysis results include safety system performance analysis of the passive safety system of the simulated vehicle and / or performance analysis of the active safety system of the simulated vehicle, so that during a collision process, the safety performance of the active safety system and / or the passive safety system of the simulated vehicle can be tested separately or simultaneously according to the simulated conditions of the simulated vehicle and the virtual character.

[0054] The entire test is carried out in a virtual environment. Compared with traditional on-site vehicle testing, the test environment can be changed by adjusting the virtual environment parameters, as well as the parameters of the vehicle control system and body structure to optimize the active and passive safety system performance of the simulated vehicle. This not only makes the test environment coverage wider during the test, but also makes the test process more comprehensive and the test results more accurate.

[0055] like Figure 2 As shown, A represents the final state parameters of the simulated vehicle, B represents the final state parameters of the virtual character, and C represents the analysis results, that is, the active and passive safety system performance of the simulated vehicle. First, a virtual environment is built. At this time, the state parameters of the simulated vehicle are initialized to A0, and the state parameters of the virtual character are initialized to B0. Then, A0 is replaced by the state parameters A1 of the simulated vehicle in the test requirements, and B0 is replaced by the state parameters B1 of the virtual character in the test requirements. At this time, the system is run for a period of time to obtain and analyze the relevant parameters, and obtain the safety system analysis score result Cn of the simulated vehicle under this test requirement. It is judged whether Cn is not less than the preset value of the safety system analysis score result of the preset simulated vehicle. If it is satisfied, the training is stopped and A (i.e., A1) and C (i.e., Cn) at this time are output; if it is not satisfied, the state parameters that need to be updated in the simulated vehicle are analyzed according to Cn, and A1 is replaced by the new state parameters A(2) of the simulated vehicle and the system is run to obtain a new Cn until Cn is not less than the preset value of the safety system analysis score result, and A and C at this time are output, wherein n represents the number of runs. Finally, the active and passive safety system performance of the simulated vehicle can be determined according to the safety system analysis score result reaching the preset value and the state parameters of the simulated vehicle.

[0056] Preferably, the simulation environment parameters include parameters corresponding to road conditions and parameters corresponding to weather conditions. The parameters corresponding to road conditions include road slope change parameters (such as length parameters of uphill sections, inclination angle parameters of downhill sections, and length parameters of flat sections, etc.), lane width parameters in roads (such as width parameters of single lanes, width parameters of double lanes, and width parameters of multiple lanes, etc.), road surface types (such as asphalt, concrete, and gravel roads), road markings (such as lane lines, crosswalks, and stop lines), road surface damage types (such as potholes and cracks), road surface condition types, and traffic sign types (such as speed limit signs, stop signs, and no-entry signs). Parameters corresponding to weather conditions include different weather types, illumination condition parameters of different time periods, rainfall parameters of different intensities, snowfall parameters, wind speed, wind direction, temperature, and foggy days with different visibility, etc.

[0057] Preferably, the state structure parameters of the simulation vehicle include vehicle dynamics parameters, tire parameters, suspension system parameters, steering system parameters, brake system parameters and power transmission system parameters, etc., wherein the tire parameters are used to characterize the contact mechanical properties between the tire and the ground, including longitudinal force, lateral force and spin torque. The suspension system parameters are used to characterize the dynamic response of the vehicle under different road conditions. The steering system parameters are used to characterize the handling performance of the vehicle, including steering ratio and steering assistance. The brake system parameters are used to characterize the braking performance of the vehicle, including brake discs, brake pads and brake fluid pressure. The power transmission system parameters are used to characterize the characteristics of the power transmission system such as the engine, gearbox, drive shaft, etc., to reflect the power output and acceleration performance of the vehicle.

[0058] Preferably, the state structural parameters of the simulated vehicle also include body structural parameters, including parameters corresponding to the body geometry, parameters corresponding to the material properties, and parameters corresponding to the internal structure, wherein the parameters corresponding to the body geometry include geometric data based on the actual vehicle, which can build a detailed body model, including the front, rear, doors, and windows. The parameters corresponding to the material properties include defining the material properties of each part of the body, such as stiffness, strength, and density, which can simulate the deformation behavior of the vehicle in a collision. The parameters corresponding to the internal structure include considering the internal structure of the vehicle, such as the dashboard, seats, and seat belts, which can be used to evaluate the protection effect of the occupants in a collision, that is, the active safety performance of the simulated vehicle.

[0059] Preferably, the control system parameters of the simulated vehicle also include collision mechanics parameters, including collision force parameters, secondary collision parameters and restraint system parameters. The collision force parameters are used to simulate the collision force between the vehicle and the pedestrian, including the collision angle, contact point, collision speed, etc., to evaluate the force condition of the pedestrian during the collision; the secondary collision parameters are used to simulate the secondary collision between the pedestrian and the front structure of the vehicle, such as the collision between the head and the windshield or the engine hood, to evaluate the risk of head injury to the pedestrian; the restraint system parameters simulate the role of passive safety equipment such as seat belts and airbags in a collision, and evaluate their protective effect on the occupants, that is, the passive safety performance of the simulated vehicle.

[0060] Preferably, the test parameters of the virtual character include body structure parameters, which include human characteristic parameters, multi-rigid body model parameters, joint connection parameters and spring-damper structure parameters, wherein the human characteristic parameters include height, weight and body surface dimensions; each rigid body in the multi-rigid body model parameters represents a part of the human body, such as the head, upper arm, forearm, hand, pelvis, thigh, calf and foot; the joint connection parameters are used to define the joint connections between the rigid bodies to simulate the human body's degrees of freedom of movement, for example, the neck adopts a combination of spherical joints and translation joints, the knee joints and ankle joints adopt rotational joints, and the remaining joints adopt spherical joints; the spring-damper structure parameters include using spring-damper structures at key joints to simulate the flexibility and elasticity of the human body, such as the knee joints and ankle joints, which helps to more realistically simulate the dynamic response of pedestrians in a collision.

[0061] Preferably, the test parameters of the virtual character also include behavioral parameters, including walking speed parameters, reaction time parameters, avoidance behavior parameters and walking posture parameters, wherein the avoidance behavior parameters define the avoidance behavior of pedestrians when encountering vehicles, including stopping, turning and accelerating actions; the walking posture parameters are used to define the walking posture of pedestrians, such as upright, leaning forward, leaning backward, leaning left and leaning right, to reflect different walking states.

[0062] In this embodiment, the safety system analysis results of the simulated vehicle in S4 include the analysis results of the active safety performance of the simulated vehicle and the analysis results of the passive safety performance of the simulated vehicle, wherein the analysis results of the active safety performance of the simulated vehicle are the first analysis results, and the analysis results of the passive safety performance of the simulated vehicle are the second analysis results. By dividing the safety system analysis results of the simulated vehicle into two parts, active safety performance and passive safety performance, the overall safety performance of the vehicle can be comprehensively evaluated, and more abundant data support is provided, so that the effectiveness of the vehicle safety system can be evaluated from two dimensions, active safety performance and passive safety performance.

[0063] like Figure 1 and Figure 3 As shown, in this embodiment, obtaining the first analysis result in S4 specifically includes the following steps:

[0064] S41: determining collision parameters between the simulated vehicle and the virtual character in the virtual simulation environment from the preprocessed state parameters of the virtual character and the state structure parameters of the simulated vehicle, wherein the collision parameters at least include deformation parameters of the front structure of the simulated vehicle;

[0065] S42: Determine the damage result of the front structure of the simulated vehicle to the virtual character according to the deformation parameters of the front structure of the simulated vehicle, which is the first analysis result.

[0066] The damage result of the front structure of the simulated vehicle to the virtual character is determined by the deformation parameters of the front structure of the simulated vehicle. The performance of the passive safety system of the simulated vehicle under the test scenario can be obtained by analyzing the structural deformation parameters of the contact part between the simulated vehicle and the virtual character. The structural deformation parameters of the simulated vehicle and the damage result of the virtual character are combined to obtain the damage result of the simulated vehicle structure to the virtual character, making the damage result more comprehensive and accurate.

[0067] Preferably, the deformation parameters include body geometry, material properties, and internal structure, wherein the body geometry includes building a detailed body model based on the geometric data of the actual vehicle, including the front, rear, doors and windows; the material properties include defining the material properties of each part of the body, such as stiffness, strength and density, to simulate the deformation behavior of the vehicle in a collision; and the internal structure includes considering the internal structure of the vehicle, such as the dashboard, seats and seat belts, to evaluate the protection effect of the occupants in a collision.

[0068] Preferably, the first analysis result includes structural deformation analysis and restraint system analysis, wherein the structural deformation analysis uses finite element analysis software, such as dynamic analysis finite element program (LS-DYNA), to simulate the deformation of the vehicle's front structure (such as bumper and hood) in a collision to evaluate its protective effect on pedestrians; wherein the restraint system analysis includes evaluating the role of the vehicle's passive safety system (airbags and pedestrian protection devices) in a collision to ensure that it can effectively reduce the degree of injury to pedestrians.

[0069] In this embodiment, the state parameters of the simulated vehicle are updated according to the safety system analysis and scoring results in S5, specifically including: determining the deformation parameters that need to be adjusted for the front structure of the simulated vehicle according to the first analysis result, and replacing the state structure parameters of the simulated vehicle according to the deformation parameters that need to be adjusted for the front structure of the simulated vehicle. By dynamically updating the deformation parameters of the front structure of the simulated vehicle, the behavior of the vehicle during the collision can be more accurately simulated, thereby improving the accuracy and reliability of the simulation and providing a test result that is closer to the actual accident.

[0070] In this embodiment, the damage results of the front structure of the simulated car on the virtual character include at least the head injury, lower limb injury and chest injury of the virtual character. By clarifying that the damage results of the simulated car on the virtual character include at least the head injury, lower limb injury and chest injury, the damage assessment of the virtual character is more comprehensive, and at the same time, it can more accurately reflect the various types of injuries that the human body may suffer in a collision accident, thereby providing detailed data support for the design and optimization of the passive safety system of the simulated car.

[0071] like Figure 1 and Figure 3 As shown, the acquisition of the second analysis result specifically includes the following steps:

[0072] S43: acquiring position parameters and speed parameters of the simulated vehicle in the virtual simulation environment, and position parameters and speed parameters of the virtual character from the state parameters of the virtual character and the state parameters of the simulated vehicle, so as to acquire the state and position relationship between the simulated vehicle and the virtual character;

[0073] S44: Analyze the collision risk information of the simulated vehicle and the virtual character according to the position parameters and speed parameters of the simulated vehicle and the position parameters and speed parameters of the virtual character, and analyze the collision risk information to obtain a collision risk information scoring result, which is the second analysis scoring result.

[0074] By obtaining the position parameters and speed parameters of the simulated vehicle and the virtual character, the relative position and motion state between the simulated vehicle and the virtual character can be analyzed in advance, thereby evaluating the risk of collision; the state parameters of the operation of the simulated vehicle in the virtual simulation environment are obtained from the state parameters of the simulated vehicle, and the state parameters of the operation of the virtual character in the virtual simulation environment are obtained from the state parameters of the virtual character, and the state parameters of the operation of the simulated vehicle and the state parameters of the operation of the virtual character are analyzed.

[0075] In this embodiment, according to the safety system analysis and scoring results, the state parameters of the simulated vehicle are updated, specifically including: according to the second analysis result, the control parameters that need to be adjusted in the control system parameters of the simulated vehicle are determined so that the control system updates the speed parameters of the simulated vehicle according to the control parameters. By analyzing the position and speed parameters of the simulated vehicle and the virtual character, the interaction between the simulated vehicle and the virtual character in the virtual simulation environment can be more comprehensively evaluated. It is possible to analyze the degree of change of the operating state of the simulated vehicle by the control system of the simulated vehicle during the operation of the simulated vehicle to test the performance of the control system, that is, the active safety system performance of the simulated vehicle.

[0076] In this embodiment, the preprocessing in S4 includes data cleaning, data normalization and data classification. Through the data cleaning step, the erroneous, missing or unreasonable data points generated in the simulation process can be identified and eliminated, so that the state parameters of the virtual character and the state parameters of the simulated vehicle after the preset time of data cleaning are more accurate and reliable; different types of data are normalized so that they can be compared and analyzed on the same scale; the state parameters of the virtual character and the state parameters of the simulated vehicle after the preset time are classified according to different indicators, which simplifies the analysis process and makes the analysis results more accurate.

[0077] Preferably, the classification indicators include one or more of accident type, driving behavior pattern and external environmental factors.

[0078] Embodiment 2

[0079] A computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, a vehicle active and passive integrated safety simulation test method in embodiment 1 is implemented.

[0080] Embodiment 3

[0081] An electronic device includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the program, a vehicle active and passive integrated safety simulation test method in the first embodiment described above is implemented.

[0082] The above embodiments are only preferred embodiments for fully illustrating the present invention, and the protection scope of the present invention is not limited thereto. Any equivalent substitution or change made by a person skilled in the art based on the present invention is within the protection scope of the present invention.

Claims

1. A vehicle active and passive integrated safety simulation test method, characterized in that: The following steps are involved: S1: constructing a virtual simulation environment according to initial state parameters of the simulation vehicle and initial state parameters of the virtual character, wherein the virtual simulation environment includes a moving simulation vehicle and a moving virtual character; S2: replacing the initial state parameters of the simulated vehicle and the initial state parameters of the virtual character in the virtual simulation environment respectively according to the test parameters of the simulated vehicle and the test parameters of the virtual character in the preset test requirements, wherein the test parameters of the simulated vehicle include the control system parameters of the simulated vehicle and the state structure parameters of the simulated vehicle; S3: After the virtual simulation environment runs for a preset time, the state parameters of the virtual character and the state parameters of the simulation vehicle are obtained; S4: preprocessing the state parameters of the virtual character and the state parameters of the simulated vehicle obtained in S3, and analyzing the preprocessed state parameters of the virtual character and the state parameters of the simulated vehicle to obtain the safety system analysis and scoring result of the simulated vehicle within the preset time; S5: According to the safety system analysis and scoring result, the state parameters of the simulated vehicle are updated, and steps S3-S4 are repeated until the safety system analysis and scoring result reaches a preset value, and the updating of the state parameters of the simulated vehicle is stopped, and the safety system analysis and scoring result and the state parameters of the simulated vehicle that reach the preset value are obtained to determine the active and passive safety system performance of the simulated vehicle.

2. A vehicle active and passive integrated safety simulation test method according to claim 1, characterized in that: The safety system analysis and scoring results of the simulated vehicle in S4 include the analysis and scoring results of the active safety performance of the simulated vehicle and the analysis and scoring results of the passive safety performance of the simulated vehicle, wherein the analysis and scoring results of the passive safety performance of the simulated vehicle are the first analysis and scoring results, and the analysis and scoring results of the active safety performance of the simulated vehicle are the second analysis and scoring results.

3. A vehicle active and passive integrated safety simulation test method according to claim 2, characterized in that: The acquisition of the first analysis result in S4 specifically includes the following steps: S41: determining collision parameters between the simulated vehicle and the virtual character in the virtual simulation environment from the preprocessed state parameters of the virtual character and the state structure parameters of the simulated vehicle, wherein the collision parameters at least include deformation parameters of the front structure of the simulated vehicle; S42: determining the damage result of the front structure of the simulated vehicle to the virtual character according to the deformation parameters of the front structure of the simulated vehicle, so as to obtain a damage scoring result of the front structure of the simulated vehicle to the virtual character, wherein the damage scoring result is the first analysis scoring result.

4. A vehicle active and passive integrated safety simulation test method according to claim 3, characterized in that: In S5, the state parameters of the simulation vehicle are updated according to the safety system analysis and scoring results, specifically including: According to the first analysis result, the deformation parameters of the front structure of the simulated vehicle that need to be adjusted are determined, and the state structure parameters of the simulated vehicle are replaced according to the deformation parameters of the front structure of the simulated vehicle that need to be adjusted.

5. The vehicle active and passive integrated safety simulation test method according to claim 3 is characterized in that: The damage results of the front structure of the simulation vehicle on the virtual character at least include head damage, lower limb damage and chest damage of the virtual character.

6. A vehicle active and passive integrated safety simulation test method according to claim 2, characterized in that: The acquisition of the second analysis result specifically includes the following steps: S43: acquiring the position parameters and speed parameters of the simulated vehicle in the virtual simulation environment and the position parameters and speed parameters of the virtual character from the state parameters of the virtual character and the state parameters of the simulated vehicle, so as to acquire the state and position relationship between the simulated vehicle and the virtual character; S44: Analyze the collision risk information of the simulated vehicle and the virtual character according to the position parameters and speed parameters of the simulated vehicle and the position parameters and speed parameters of the virtual character, and analyze the collision risk information to obtain a collision risk information scoring result, which is the second analysis scoring result.

7. A vehicle active and passive integrated safety simulation test method according to claim 6, characterized in that: According to the safety system analysis and scoring results, the state parameters of the simulation vehicle are updated, specifically including: According to the second analysis result, the control parameters that need to be adjusted in the control system parameters of the simulated vehicle are determined, so that the control system updates the speed parameters of the simulated vehicle according to the control parameters.

8. The vehicle active and passive integrated safety simulation test method according to claim 1, characterized in that: The preprocessing in S4 includes data cleaning, data normalization and data classification.

9. A computer-readable storage medium storing a computer program, wherein the computer program, when executed by a processor, implements the method according to any one of claims 1 to 8.

10. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the method according to any one of claims 1 to 8 when executing the program.

Images