电动汽车电机驱动控制器功能安全架构研究

Research on the System Architecture of EV Motor Control Unit Based on Functional Safety

基于汽车功能安全的相关标准,介绍了危害分析与风险评估的基本方法,并由此确定了电动汽车电机驱动控制器的安全目标和汽车安全完整性等级;通过对EGAS架构的分析,提出了其功能监控层的实现方法,详细阐述了针对不同微处理器结构实现系统功能安全架构的设计方法,并通过Matlab仿真分析和台架测试进行了验证。研究结果表明,双芯片微处理器的系统安全架构对安全目标的实现以及标准化产品开发具有显著优势。

This paper presented the basic methods of hazard analysis and risk assessment which based on the functional safety related standards, and then the safety goal and ASIL of EV motor control unit have been derived according to HARA. The implementation method of function monitoring level was proposed through the analysis of EGAS architecture and verified by Matlab simulation analysis and Dyno test, and then the design method of the realization of system functional safety architecture for different microprocessor structure was expanded. The results show that the system safety architecture of dual chip microprocessors has significant advantages in the realization of safety goal and the standardized product development.