Design of paramet ric fault detection systems: An H- infinity optimization app roach

Problems related to the design of observer- based parametric fault detection (PFD) systems are studied. The core of our study is to first describe the faults occurring in system actuators , sensors and components in the form of additive parameter deviations ,then to transform the PFD problems into a similar additive fault setup , based on which an optimal observer- based optimization fault detection approach is proposed. A constructive solution optimal in the sense of minimizing a certain performance index is developed. The main results consist of defining parametric fault detectability , formulating a PFD optimization problem and its solution. A numerical example to demonstrate the effectiveness of the proposed approach is provided.