电驱动力系统功能安全概念设计和安全确认  

Electric Power-train System Function Safety Concept Design and Safety Validation

作　　者：吴浩 魏广杰 刘永 严运兵[3] WU Hao;WEI Guang-jie;LIU Yong;YAN Yun-bing(Jiangling Motors Co,Ltd.,Nan Chang 330052,China;Wuhan University of Science and Technology,Wuhan 430065,China)

机构地区：[1]江铃汽车股份有限公司,整车工程研究院,南昌330052 [2]江铃汽车股份有限公司,南昌330052 [3]武汉科技大学,武汉430065

出　　处：《汽车科技》2021年第5期17-24,共8页Auto Sci-Tech

摘　　要：为了论证基于IS02626的功能安全概念设计和安全确认方法可以实现安全目标,对某电动汽车电驱动力系统纵向驱动功能非预期的失效进行了危害分析和风险评估,以"防止非预期的车辆自主移动"安全目标为例,针对红绿灯路口停车场景,建立非预期车辆自主移动数学模型,参考仿真结果对监控扭矩阈值和故障容忍时间间隔(FTTI)进行设计,并在实车上进行安全确认测试。测试结果表明,基于仿真结果设计的安全需求实现了和安全目标的一致性,且具备避免危害的能力。In order to demonstrate that the functional safety concept design and safety validation method based on IS02626 can achieve safety goal,hazard analysis and risk assessment of an electric vehicle power-train system longitudinal driving function’s unexpected failure is carried out.Taking the safety goal of"preventing the unintended vehicle autonomous movement"as an example,for the scene of stopping at traffic lights,a mathematical model of the unintended autonomous movement is established,the monitoring torque threshold and fault tolerant time interval are designed according to the simulation results.And safety validation test in vehicle is carried out.The test results show that the designed safety requirement based on the simulation results achieved the consistency with the safety goal and the ability of avoid hazard.

关 键 词：功能安全 故障容忍时间间隔 安全目标 安全确认 故障注入 

分 类 号：U469.72[机械工程—车辆工程]