CN-121977863-A - Method, system, equipment and medium for verifying reliability of vehicle suspension system

CN121977863ACN 121977863 ACN121977863 ACN 121977863ACN-121977863-A

Abstract

The application provides a reliability verification method, a system, equipment and a medium for a vehicle suspension system, which are used for acquiring displacement damping force time sequence data of a shock absorber of a vehicle to be tested, circularly dividing the displacement damping force time sequence data to generate an actual measurement indicator diagram of the shock absorber under a driving condition of a periodic short-wave road surface, carrying out equivalent estimation on fluid inertia effects of shock absorption liquid in a left cavity and a right cavity under a real vehicle condition according to the displacement damping force time sequence data and a topological structure to obtain inertia damping characteristics of the shock absorber under the excitation of a real vehicle composite load, determining the reliability state of the shock absorber when the flowing inertia causes the radial power to deviate based on the actual measurement indicator diagram and the inertia damping characteristics, analyzing the overall load dynamic performance of the vehicle to be tested through the reliability state, and further outputting the reliability grade of the vehicle suspension system to be tested. By adopting the scheme of the application, the reliability of the whole vehicle suspension system can be verified through the fault state of the shock absorber under the dynamic real vehicle working condition.

Inventors

LI YUYI
Tao Shenglin
FANG ZHE
GAO SHENYUAN
LU XIAOQING
GAO FENG

Assignees

江苏理工学院

Dates

Publication Date: 20260505
Application Date: 20260202

Claims (10)

1. A vehicle suspension system reliability verification method, wherein the suspension system includes a shock absorber, the vehicle to be tested performs a real vehicle road test on a periodic short-wave road surface, the method is characterized by comprising the following steps: Acquiring displacement damping force time sequence data of a shock absorber of the vehicle to be tested under the driving working condition of a periodic short-wave road surface; Circularly dividing the displacement damping force time sequence data to generate an actually measured indicator diagram of the shock absorber under the driving working condition of a periodic short-wave road surface; Acquiring a topological structure of the shock absorber, and carrying out equivalent estimation on fluid inertia effects of shock absorption liquid in a left cavity and a right cavity under a real vehicle condition according to the displacement damping force time sequence data and the topological structure to obtain an inertia damping characteristic of performance attenuation of the shock absorber under the excitation of a real vehicle composite load; determining a reliability state of the shock absorber when the flow inertia deviates radial dynamics based on the measured indicator diagram and the inertial damping characteristic; And analyzing the overall load dynamic performance of the vehicle to be tested according to the reliability state, and outputting the reliability grade of the suspension system of the vehicle to be tested.
2. The method of claim 1, wherein the generating the measured indicator diagram of the shock absorber under the driving condition of the periodic short wave road surface by circularly dividing the displacement damping force time sequence data comprises: Determining a plurality of duty cycle feature points of the displacement damping force time sequence data; dividing the displacement damping force time sequence data according to all the working cycle characteristic points to obtain a plurality of compression strokes and rebound strokes under driving conditions; And analyzing the working state of the shock absorber in each working cycle based on all compression strokes and rebound strokes to obtain an actually measured indicator diagram of the shock absorber under the driving working condition of the periodic short-wave pavement.
3. The method of claim 1, wherein the equivalent estimation of the fluid inertia effect of the shock absorber fluid in the left and right chambers under the real vehicle condition according to the displacement damping force time sequence data and the topological structure, and the obtaining of the inertia damping characteristic of the performance attenuation of the shock absorber under the excitation of the real vehicle composite load specifically comprises: Determining a flow model of the shock absorber under the real vehicle condition based on the topological structure; determining a fluid inertia parameter equivalent to the flow effect of damping fluid in the shock absorber under the excitation of a real vehicle composite load according to the flow model; And determining the inertial damping characteristics of the shock absorber for performance attenuation under the excitation of the real vehicle composite load according to the fluid inertia parameters and the displacement damping force time sequence data.
4. The method of claim 1, wherein determining a reliability state of the shock absorber when the flow inertia deviates from radial dynamics based on the measured indicator diagram and the inertial damping characteristics comprises: determining fault characteristics of the shock absorber according to the measured indicator diagram and the inertial damping characteristics; classifying and identifying the fault characteristics to obtain a fault mode of the shock absorber when the shock absorption liquid flows abnormally; a reliability state of the shock absorber when the moment of inertia deviates radial dynamics is determined based on the failure mode.
5. The method of claim 1, wherein analyzing the overall load dynamics of the vehicle under test by the reliability status, and outputting the reliability level of the vehicle under test suspension system specifically comprises: presetting a whole vehicle dynamics model of the vehicle to be tested; Determining the performance attenuation degree of the overall load dynamic performance of the vehicle to be tested according to the whole vehicle dynamics model and the reliability state; establishing a reliability grade mapping table of the suspension system of the vehicle to be tested under the whole load; And determining the reliability grade of the suspension system of the vehicle to be tested according to the performance attenuation degree and the reliability grade mapping table.
6. The method of claim 1, wherein displacement damping force timing data of the shock absorber of the vehicle under test is acquired by a displacement sensor and a force sensor.
7. The method of claim 1, wherein the periodic short wave road surface comprises a transverse wave road surface.
8. A vehicle suspension system reliability verification system, comprising: The acquisition module is used for acquiring displacement damping force time sequence data of a shock absorber of the vehicle to be tested under the driving working condition of the periodic short-wave road surface; The processing module is used for circularly dividing the displacement damping force time sequence data to generate an actually measured indicator diagram of the shock absorber under the driving working condition of the periodic short-wave pavement; The processing module is further used for obtaining a topological structure of the shock absorber, and carrying out equivalent estimation on fluid inertia effects of shock absorption liquid in the left and right cavities under the real vehicle working condition according to the displacement damping force time sequence data and the topological structure to obtain inertia damping characteristics of performance attenuation of the shock absorber under the excitation of the real vehicle composite load; the processing module is further configured to determine a reliability state of the shock absorber when the flow inertia deviates the radial dynamics based on the measured indicator diagram and the inertial damping characteristic; And the execution module is used for analyzing the overall load dynamic performance of the vehicle to be tested through the reliability state, and further outputting the reliability grade of the suspension system of the vehicle to be tested.
9. A computer device comprising a memory storing code and a processor configured to obtain the code and to perform the vehicle suspension system reliability verification method of any one of claims 1 to 7.
10. A computer-readable storage medium storing a computer program, wherein the computer program, when executed by a processor, implements the vehicle suspension system reliability verification method according to any one of claims 1 to 7.

Description

Method, system, equipment and medium for verifying reliability of vehicle suspension system Technical Field The present application relates to the field of verification, and more particularly, to a vehicle suspension system reliability verification method, system, apparatus and medium. Background The vehicle suspension system is used as a key component for influencing the control stability and the safety of the whole vehicle, and the reliability verification of the vehicle suspension system is vital in the field of automobile engineering. The performance state of the shock absorber, which is used as a core component of a suspension system, directly determines the vibration suppression capability and the running smoothness of the vehicle under dynamic load. The conventional reliability verification method mainly expands around structural durability and material fatigue life of the suspension system, focusing on performance assessment under long-time and multi-cycle load. In the prior art, the reliability verification of a vehicle suspension system is mostly dependent on passive means such as a road simulation endurance test, a bench fatigue test and the like. Although the method can detect the structural integrity of the component under steady-state load, the method is difficult to effectively capture the reliability of the active safety function of the intelligent suspension system under extreme dynamic working conditions, such as emergency obstacle avoidance, and has serious hysteresis due to the dependence on a post-treatment mode, the traditional diagnosis means such as simple vibration analysis is difficult to accurately identify the complex fault mode in the shock absorber, in addition, the traditional method only focuses on the component, and the quantitative correlation between the performance decline of the shock absorber and the functional reliability of the whole suspension system cannot be established, so that a reliability black box state exists between the component and the system. Therefore, how to verify the reliability of the whole vehicle suspension system through the fault state of the shock absorber under the dynamic real vehicle condition becomes a difficult problem in the industry. Disclosure of Invention The application provides a method, a system, equipment and a medium for verifying the reliability of a vehicle suspension system, which can verify the reliability of the whole vehicle suspension system through the fault state of a shock absorber under the dynamic real vehicle condition. In a first aspect, the present application provides a method for verifying reliability of a suspension system for a vehicle, wherein the suspension system includes a shock absorber, and a vehicle to be tested performs a real vehicle road test on a periodic short-wave road surface, the method comprising the steps of: Acquiring displacement damping force time sequence data of a shock absorber of the vehicle to be tested under the driving working condition of a periodic short-wave road surface; Circularly dividing the displacement damping force time sequence data to generate an actually measured indicator diagram of the shock absorber under the driving working condition of a periodic short-wave road surface; Acquiring a topological structure of the shock absorber, and carrying out equivalent estimation on fluid inertia effects of shock absorption liquid in a left cavity and a right cavity under a real vehicle condition according to the displacement damping force time sequence data and the topological structure to obtain an inertia damping characteristic of performance attenuation of the shock absorber under the excitation of a real vehicle composite load; determining a reliability state of the shock absorber when the flow inertia deviates radial dynamics based on the measured indicator diagram and the inertial damping characteristic; And analyzing the overall load dynamic performance of the vehicle to be tested according to the reliability state, and outputting the reliability grade of the suspension system of the vehicle to be tested. In some embodiments, the generating the actually measured indicator diagram of the shock absorber under the driving condition of the periodic short-wave road surface specifically includes: Determining a plurality of duty cycle feature points of the displacement damping force time sequence data; dividing the displacement damping force time sequence data according to all the working cycle characteristic points to obtain a plurality of compression strokes and rebound strokes under driving conditions; And analyzing the working state of the shock absorber in each working cycle based on all compression strokes and rebound strokes to obtain an actually measured indicator diagram of the shock absorber under the driving working condition of the periodic short-wave pavement. In some embodiments, according to the displacement damping force time sequence data and the topological structu