基于观测器的车辆电子稳定控制系统 执行器故障重构.

In order to improve the stability of vehicles under complex operating conditions when the actuator fails, a fault reconstruction strategy based on observer was designed for the electronic stability control system of uncertain vehicles. Considering the uncertain factors in the four-wheel steering system, a dual-input and dual-output mathematical model was established. An augmented system is constructed and the observer gain matrix is obtained by Lyapunov function and linear matrix inequality techniques. The effectiveness of the proposed method is verified by MATLAB/ Simulink and Carsim joint simulation. The results indicate that there is some certain deviation between the observer state estimated value and the real value when the fault occurs. However, the estimated value can quickly track the real value to realize fault diagnosis. Compared with the front-wheel steering system, the four-wheel steering system can significantly enhance the stability and safety of the vehicle at high speed. [ABSTRACT FROM AUTHOR]