基于模型驱动架构的电动汽车电动助力转向系统可靠性研究  

The Research on Electric Vehicle EPS System Reliability Based on MDA

作　　者：马铮 周海鹰[2] 李小庆[1] 何细鹏[1] Ma Zheng;Zhou Haiying;Li Xiaoqing;He Xipeng(Wuhan Technical College of Communications,Wuhan 430065;Hubei University of Automotive Technology,Shiyan 442002)

机构地区：[1]武汉交通职业学院,武汉430065 [2]湖北汽车工业学院,十堰442002

出　　处：《汽车技术》2020年第12期36-42,共7页Automobile Technology

基　　金：湖北省科技国际合作研究计划项目(2019AHB060);武汉交通职业学院2019年科研项目(Y2019004);武汉交通职业学院科研创新团队建设项目(CX2018A15)。

摘　　要：为提高电动助力转向(EPS)系统可靠性,提出了基于模型驱动架构(MDA)的EPS系统可靠性建模与评估方法。采用结构分析与设计语言(AADL)构建系统架构(A-EPS)模型,采用错误模型附件(EMA)子语言及EPS系统相关部件的故障统计数据构建系统可靠性(R-EPS)模型,研究并改进EMA模型到故障树分析(FTA)模型的映射规则,实现了R-EPS模型到EPS系统FTA模型的转换,同时,为追踪系统薄弱环节,从顶上事件概率、基本事件概率重要度、临界重要度和结构重要度4个方面进行分析,得出EPS失效概率,追踪到了系统薄弱环节,并给出合理化建议。In order to improve the reliability of the Electric Power Steering(EPS)system,the reliability modeling and evaluation method of EPS system based on Model-Driven Architecture(MDA)is proposed.The EPS architecture(A-EPS)model is constructed by Architecture Analysis and Design Language(AADL);the EPS reliability(R-EPS)model is constructed by using EMA sub-language and EPS related components fault statistics.Besides,the mapping rules of EMA model to Fault Tree Analysis(FTA)model is studied and the conversion of R-EPS model to EPS fault tree model is realized.In order to track the weak links of the system,the reliability analysis is carried out from 4 aspects:top event probability,basic event probability importance,critical importance and structural importance.The EPS failure probability is obtained,the weak link of the system is traced,and reasonable suggestions are given.

关 键 词：电动助力转向系统 模型驱动架构 可靠性 故障树分析 电动汽车 

分 类 号：TP311[自动化与计算机技术—计算机软件与理论]