On consistency of output-error closed-loop subspace model identification for systems compensated by general LTI controllers ?

摘要

This paper deals with consistency analysis of a closed-loop subspace model identification method for systems compensated by general linear time-invariant feedback controllers. The results presented here are a straightforward extension from the authors’ recent work for systems compensated with constant gain feedback controllers. It is shown that the estimate of the extended observability matrix, which is obtained from our closed-loop subspace model identification method, is consistent up to a similarity transform.