Identification and control experiments for a large space structure

This paper presents results on studying the identification and attitude control problem for an LSS (large space structure). The proposed identification method is based on Bierman's UD factorization method where the order of the identification model is determined by the frequency domain criterion, that is, the whiteness of the residual sequence. Two control methods, i.e. (i) I-PD control and (ii) optimal regulator are described. In particular, an optimal regulator was designed to locate all the closed-loop eigenvalues in a given region which may realize the desired dynamic behavior of the closed-loop system, so the control system has a large vibration suppression capability. The efficiency of these proposed identification and control method is shown by a ground-based test model.