Administrator by China Associction for Science and Technology
Sponsored by China Society of Automotive Engineers
Published by AUTO FAN Magazine Co. Ltd.

Automotive Engineering ›› 2023, Vol. 45 ›› Issue (10): 1975-1983.doi: 10.19562/j.chinasae.qcgc.2023.10.018

Special Issue: 底盘&动力学&整车性能专题2023年

Previous Articles     Next Articles

Vehicle Fault Location Method Based on Fuzzy BN and Improved Evidence Theory

Jie Hu1,2,3(),Xiao Zhang1,2,3,Min Wei1,2,3,4,Lin Chen1,2,3,Haihua Qing1,2,3,Changbin Gao4   

  1. 1.Wuhan University of Technology,Hubei Key Laboratory of Modern Auto Parts Technology,Wuhan  430070
    2.Wuhan University of Technology,Auto Parts Technology Hubei Collaborative Innovation Center,Wuhan  430070
    3.Hubei Technology Research Center of New Energy and Intelligent Connected Vehicle Engineering,Wuhan  430070
    4.SAIC-GM-Wuling Automobile Company Limited,Liuzhou  545000
  • Received:2023-02-01 Revised:2023-03-17 Online:2023-10-25 Published:2023-10-23
  • Contact: Jie Hu E-mail:auto_hj@163.com

Abstract:

This paper proposes a vehicle fault location method based on fuzzy BN and improved evidence theory, in order to solve the problem of difficulty in locating the source fault parts by analyzing the fault codes due to generation of a large number of chaotic diagnosis trouble codes by the associated faults of vehicle parts in the process of vehicle after-sales maintenance. Firstly, the fuzzy BN model is constructed according to historical data and expert experience and the posterior probability is obtained. Secondly, the posterior probability is input as the basic probability assignment of the improved evidence theory, and the correction coefficient combining Deng entropy and Pignistic probability distance is proposed to correct the evidence, so as to solve the problems of the uncertainty of the evidence itself and the conflict between evidences. Then, the evidence synthesis rule based on matrix analysis is adopted to avoid a large number of evidence synthesis failures and reduce the amount of computation, and the fault location results are obtained. Finally, the ABS system is taken as an example to verify the feasibility of this method, which can provide guidance for maintenance personnel to locate faults quickly.

Key words: diagnosis trouble code, fuzzy Bayesian network, D-S evidence theory, fault location