Continuous-time deadbeat fault detection and isolation filter design

Abstract

A deadbeat (finite-time settling) fault detection and isolation (FDI) filter for a continuous-time invariant system is proposed in order to detect and isolate corrupted faults in a pre-defined finite time by introducing intentional delays in residuals. Conventional FDI algorithms have relied on asymptotically converging residuals to detect and isolate faults; while the proposed deadbeat FDI filter relies on residuals, which converge in a pre-determined finite-time. It is shown that both the effect of the initial state estimation error and fault responses converge in the pre-defined finite-time.