An observer-based control system with extended bounded-sensor-faults

In this paper an observer-based novel design of robust control system with an estimate scheme of sensor states to accommodate extended bounded-sensor-faults is presented. The sensor faults taken into consideration are, in general, modeled as polytopic bounds in robust control framework and are usually given as a priori assumption. But, in practice, the sensors that are subject to fault are especially vulnerable to various conditions, such as temperature, humidity, altitude, etc. and, thus, their faults may fall outside the presumed bounds easily. An estimate scheme of sensor state is integrated into the observer-based control system where the sensor fault outside the presumed region is captured and, then, the notion of the well-known quadratic stability is used to stabilize the system, while, in the mean time, a robust performance measure of an output error signal is guaranteed in the presence of a set of extended admissible sensor faults. An numerical example of F-16 aircraft model and its simulation results are given to show the designed effectiveness.