On Fault Detection Using Asymptotic Reduced-Order Observers

This paper solves the problems of the additive system fault detection based on the asymptotic reduced-order observers, which can estimate the system states. To construct the fault residual filter when additive faults may occur in the system, an adaptation of this principle is proposed. The constraints for the existence of asymptotic reduced-order observers are newly given and the necessary structure of the fault residual filter is introduced. A numerical example is included to illustrate the design and the effectiveness of the proposed method.