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.