An indirect closed loop subspace identification method

In this paper, we consider a closed-loop subspace identification problem. An indirect method is developed using exogenous input and knowledge of a part of the controller impulse response. The idea is to extract dynamic of the plant from dynamic of the closed loop system. Two main result allows this double estimation. Only the deterministic behavior of the plant is considered in this paper. A simulation example is given to illustrate the performances of the present method.