Adaptive fuzzy sensor failure compensation for active suspension systems with multiple sensor failures

Abstract

This paper has studied the adaptive fuzzy fault-tolerant control (FTC) for active suspension systems via the sensor failure compensation method. In the control design, fuzzy logic systems (FLSs) are used to identify the unknown nonlinear dynamics, and the projection technique is utilized to deal with the multiple sensor failures. Combining with the backstepping technique, a novel FTC method has been developed. The proposed control method can guarantee that all the signals in the closed-loop system are all bounded, and the tracking error can converge to the neighbourhood of the origin. Finally, a simulation for the quarter active suspension system is given to verify the effectiveness of the developed control scheme.

Keywords

• fault-tolerant control
• fuzzy logic systems
• active suspension systems
• unknown nonlinear dynamics
• backstepping technique