乘用车转向功能安全主客观测试评价方法

Subjective and Objective Test and Evaluation Methods of Passenger Car Steering Functional Safety

文章依托某款转向系统装配有电动助力转向系统(EPS)的车型,根据ISO26262-10:2018定义的功能安全测试要求,对其转向系统进行危害分析、定义安全目标和导出测试用例,通过故障注入的方法对转向系统的安全机制进行客观有效性和符合性验证;设计了合理有效的主观评价打分标准,驾驶员依据真实驾驶感受对安全机制触发后转向操作的舒适性和可操控性进行评价;实验结果表明,通过主客观相结合的测试评价方法,可以实现对转向系统功能安全的综合验证和评估。

This paper relies on a steering system equipped with electrical power steering(EPS),according to the functional safety test requirements defined by ISO 26262-10:2018,conducts hazard analysis on its steering system,defines safety objectives and derives test cases,and conducts objective effectiveness and compliance verification of steering system safety mechanism by fault injection method.A reasonable and effective subjective evaluation scoring standard is designed,and the driver evaluates the comfort and controllability of steering operation after the safety mechanism is triggered according to the real driving experience.The experimental results show that the comprehensive verification and evaluation of functional safety of steering system can be realized by combining subjective and objective test and evaluation method.