Automobile Electronic Stability Program Fault Tolerant Control Based On Data-driven

ESP is an important control system developed on the basis of ABS and TCS(ASR), aim at satisfy our requirement on vehicle driving safety and operation stability.The difference between ABS, TCS and ESP is that when the vehicle drivingconditions are unstable, ABS and TCS can only respond passively. The ECU in ESPcan analysis road conditions and vehicle conditions and driver’s driving intentionsfrom the information from each sensor. When the vehicle running status is unstableESP will intervene and make the car run under stable condition and avoid trafficaccidents. Therefore, ESP play an important role in the vehicle driving safety andoperation stability, we must make sure that it’s always stable. If ESP fails, it willaffect the vehicle stability and result in serious consequences. The research of ESPfault and fault-tolerant is necessary and of great significance.After the study of the operating principle of ESP and vehicle dynamics, wethoroughly understood car stability control thought. Through describe and analysis ofthe sensor fault and actuator fault of ESP, on the basis of malfunction and theinfluence of fault to the vehicle stability, we use different fault-tolerant controlmethod to research sensor fault and actuator fault. Take yaw velocity sensor and sideacceleration sensor for example, we research fault tolerant control of sensor fault.According to the analytical redundancy relationship we made fault tolerant controlcompensation for the fault. Take actuator fault of a wheel brake system of ESP forexample, we do fault tolerant control research with fuzzy expert control system. Wemake up the influence of wheel system underpowered resulted from actuator fault bybring compensation system power to the trouble-free wheels. At last, we set up faulttolerant control model of sensors and actuators in AMESim and Simulink, then go onjoint simulation and do analysis.