Robustness in partial pole placement

Nichols, N. ORCID: https://orcid.org/0000-0003-1133-5220 (1987) Robustness in partial pole placement. IEEE Transactions on Automatic Control, 32 (8). pp. 728-732. ISSN 0018-9286 doi: 10.1109/TAC.1987.1104703

Abstract/Summary

The robustness of state feedback solutions to the problem of partial pole placement obtained by a new projection procedure is examined. The projection procedure gives a reduced-order pole assignment problem. It is shown that the sensitivities of the assigned poles in the complete closed-loop system are bounded in terms of the sensitivities of the assigned reduced-order poles, and the sensitivities of the unaltered poles are bounded in terms of the sensitivities of the corresponding open-loop poles. If the assigned poles are well-separated from the unaltered poles, these bounds are expected to be tight. The projection procedure is described in [3], and techniques for finding robust (or insensitive) solutions to the reduced-order problem are given in [1], [2].