Dissipativity and stability recovery by fault hiding

Abstract

This paper addresses the problem of dissipativity-based fault tolerant control (FTC) based on fault hiding approach. In particular, a static recon guration block (RB) is used for recon guration of faulty systems. Such block performs a loop transformation by inserting series, feedback, and feedforward gains to a system including plant, sensor or actuator faults. The proposed approach consists in recovering dissipativity and passivity conditions of a previously dissipative system, ensuring that the recon gured system has the same supply function of the nominal system. Numerical examples illustrate how such approach can be used to recover the asymptotic stability by fault hiding even for nonlinear systems. Furthermore, LMI-based conditions for designing the proposed RB are provided for stability recovery for linear systems.