Functional safety concept design for EMB brake-by-wire system based on vehicle dynamic
A functional safety concept design was conducted for smart vehicles with electronic mechanical braking(EMB)system to improve its safety and robustness.A fault injection simulation method was employed based on the ISO 26262 and combined with the product development status,to obtain the vehicle dynamic characteristics during EMB faulting,which provided the data for the assessment on severity and controllability,and effectively solved the problem of insufficient database in EMB system.The quantified severity and controllability were defined.The hazard analysis and risk assessment(HARA)were carried out,and 10 safety goals and their corresponding automotive safety integrity levels(ASIL)were achieved.The functional safety architecture and requirements of EMB system were developed with the functional safety concept design of the system being completed.Therefore,the concept analysis method can provide references for the functional safety development of other new intelligent driving electronic systems.
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