A New Method for Observer Design Using Eigenstructure Assignment and its Application on Fault Detection and Isolation

Abstract: In this paper the design of an observer for Multi-input Multi-output (MIMO) systems using eigenstructure assignment and the employment of this observer for fault diagnosis are investigated. Moreover, the designed observer will be implemented in a model of unmanned aircraft. Furthermore, the state feedback design with eigenstructure assignment has been accomplished on the aircraft. The design aim is to obtain suitable gains for the observer and the state feedback, as well. Using this method, a complete parametric expression for the observer gains and the state feedback gains are established in terms of a set of parametric vectors and closed loop poles. The existence of a set of parametric vectors and closed loop poles represents some degrees of freedom in the design. The simulation results corroborate the effectiveness and simplicity of the proposed method.