Integrated computational algorithm for solving H-infinity optimal FDI problems

Abstract

The synthesis problem of fault detection and isolation (FDI) filters can be formulated as a model matching problem and solved using an H-infinity norm optimization approach. A systematic procedure is proposed to choose appropriate filter specifications which guarantee the existence of proper and stable solutions of the model matching problem. This selection is integral part of a numerically reliable computational method to design H-infinity optimal FDI filters. The proposed design approach is completely general, being applicable to both continuous- and discrete-time systems, and can easily handle even unstable and/or improper systems.