Development of safety process in model-based design platform for safety-critical systems

The reliability and robustness of a safety-related system can be ensured by using international standards, such as ISO 26262, to develop and verify the functional safety of the system. This research proposes a safety validation and risk reduction (SVRR) process based on ISO 26262 safety standards for decreasing risk and validating safety in model-based design platform. The proposed safety process can be employed to identify the crucial components in the system, and the effects of such crucial components' failures on the functional safety can be effectively mitigated through fault-tolerant mechanism protection. An emergency brake control algorithm and brake-by-wire system was developed through the SVRR process built in NI and dSPACE system design platform. Simulation-based fault injection campaigns were performed and the experimental results show the degree of severity of the components' failures to the system and the robustness of the system. We then employ a fault-tolerant mechanism to protect the most vulnerable component to improve the system safety.