Study on Adaptive Sliding Mode Fault-tolerant Control of 1/4 Vehicle Electromagnetic Suspension

Abstract

An adaptive sliding mode fault-tolerant manage approach is proposed to remedy the trouble of actuator acquire failure of the electromagnetic hybrid energetic suspension device and the hassle of automobile manipulate balance degradation induced by using the nonlinear pressure of spring and damper. The failure thing is chosen to symbolize the actuator fault size, and the actuator fault parameter mannequin is established. Combining sliding mode manipulate with adaptive control, an adaptive sliding mode fault-tolerant controller for lively suspension primarily based on an correct mannequin is designed. Based on the Lyapunov balance theory, the steadiness of the machine is proved; and the Gravity search algorithm (GSA) and linear matrix inequality (LMIS) are used to optimize the sliding floor parameters, and the most beneficial answer is chosen in accordance to the health function. The simulation effects exhibit that in contrast with passive suspension, the root capability rectangular values of sprung mass acceleration, suspension dynamic deflection, and tire dynamic load underneath adaptive sliding mode fault-tolerant manipulate approach decrease by way of 41.7%, 38.4%, and 36.5% respectively. It suggests that the designed adaptive sliding mode fault-tolerant controller is right and can enhance car experience comfort.