An orthogonal matching pursuit based algorithm for identification of a class of closed-loop systems

This paper considers the identification problem of a class of closed-loop systems with large time-delays. Both the control plant and the feedback controller are required to be identified. The threshold orthogonal matching pursuit (TH-OMP) algorithm is applied to identify the closed-loop system indirectly. The identification contains two steps. The first is to identify the orders, time delays and the plant parameters using the TH-OMP algorithm. The second step is to identify the parameters of the feedback controller. The proposed method requires only a small number of sampling data. A simulation example is given to illustrate the effectiveness of the proposed algorithm.