冗余电动助力转向系统的故障容错机制研究  

Research on Fault Tolerance Mechanism of Redundant Electric Power Steering System

作　　者：王纪为 何德管 吴长水 WANG Jiwei;HE Deguan;WU Changshui(School of Mechanical and Automotive Engineering,Shanghai University of Engineering Science,Shanghai 201620,China;Shanghai Hiro Automotive Technologies Co.,Ltd.,Shanghai 201800,China)

机构地区：[1]上海工程技术大学机械与汽车工程学院,上海201620 [2]上海衡鲁汽车科技有限公司,上海201800

出　　处：《机械科学与技术》2025年第2期345-351,共7页Mechanical Science and Technology for Aerospace Engineering

摘　　要：为了实现SAE L3/L4级别的自动驾驶目标,EPS产品应该满足ASIL D级别的功能安全标准,因此EPS需要更加可靠的冗余方案。从硬件冗余的角度设计满足ASIL D功能安全等级要求的电动助力转向系统架构;基于冗余电动助力转向架构进一步建立EPS系统相应的故障等级以及故障容错机制;最后基于EPS台架对关键器件进行故障注入试验。试验结果表明:A级故障或B级故障发生时,电机仍能提供转向助力;C级故障发生时,转向系统助力被切断。故障发生后,EPS系统均能按照所设计的故障容错机制进行故障处理,验证了故障容错机制的有效性。In order to achieve SAE(Society of Automotive Engineers)L3/L4 autonomous driving goals,EPS(Electronic Power Steering)products should meet ASIL(Automotive Safety Integrity Level)D functional safety standards,so EPS requires more reliable redundancy schemes.In this paper,from the perspective of hardware redundancy,the electric power steering system architecture that can meet the requirements of ASIL D functional safety level is first designed.Then,the corresponding fault level and fault tolerance mechanism of EPS system are further established based on the redundant electric power steering architecture.Finally,the fault injection test of key components is carried out based on EPS platform.The test results show that the motor can still provide steering power when A or B faults occur.When a level C failure occurs,the steering power will be cut off.After the fault occurs,the EPS system can handle the fault according to the designed fault tolerance mechanism,which verifies the effectiveness of the fault tolerance mechanism.

关 键 词：容错机制 冗余设计 故障等级 转向系统 

分 类 号：U463[机械工程—车辆工程]