Output Feedback Fault Tolerant Control Solution Considering Imperfect Fault Information for Linear Parameter Varying Plants

Abstract

To tackle the fault occurring in actuator channel via Integral Sliding Mode Fault Tolerant Control scheme by exploiting available redundancy through control alloca tion scheme in output feedback framework is designed for Linear Parameter Varying Plants. The assumption of fault information which was considered to be perfect (in the exting literature) coming from FDI scheme is relaxed due to its bit conservatism nature.Imperfect fault information from FDI scheme is modeled and considered con trary to schemes available in the literature. LPV integral sliding mode controller is designed for LPV plant. An unknown input LPV observer is designed (for decou pling state estimation error from unknown inputs that can be disturbances or faults) assuming all plant states are not available and only measured outputs are available which is a realistic approach. The efficiency of the proposed control scheme is tested in simulation environment on longitudinal LPV model of a large passenger aircraft (B747) taken from literature.