Robust identification of linear system in fixed order model set

摘要

In the framework, posed by Helmichi et al., for system identification in H~infinity, the result estimate of a transfer function is a high order polynomial which is not very applicable in pratice. In this paper the robust identification is considered within a fixed order model set. A more simple and applicable identification result is obtained. The upper bound of the worst-case error of the estimate is derived and the robust convergence of the new algorithms also given.