Design of an adaptive sensor and actuator fault estimation scheme with a quadratic boundedness approach

Abstract

This paper is concerned with the problem of designing adaptive sensor and actuator fault estimation scheme for linear discrete-time systems. In particular, a suitable system parametrization is introduced in order to transform the simultaneous sensor and actuator fault estimation problem into an actuator estimation one. The scheme is dedicated to the system influenced by disturbances and hence, a quadratic boundedness approach is employed to prove its convergence. The final part of the paper shows an illustrative example concerning fault estimation of a three-tank system.