Abstract:

A robust H∞ fault detection filter based on state estimate approach is proposed for uncertain network control systems with network induced delay and normbounded unknown input. Based on Lyapunov theory and Linear Matrix Inequality (LMI) technology, a H∞ criterion for system to be asymptotically stable is obtained. Then a robust H∞ fault detection filter is derived directly from the criterion. The fault detection filter guarantees not only the quadratic stability of the closedloop systems but also the H∞ norm bound to be within a predefined level. A numerical case study demonstrates the feasibility of the proposed approach.

Key words: automatic control technology, networked control system, fault detection, robust