State-variable design methods may produce unstable feedback controllers
- 25 April 1979
- journal article
- research article
- Published by Taylor & Francis in International Journal of Control
- Vol. 29 (4) , 607-619
- https://doi.org/10.1080/00207177908922723
Abstract
The transfer function representation of controllers designed by modern state-variable design methods is considered. It is shown that procedures currently being used to design state feedback control laws and state observers (state filters) do not guarantee that the overall controller will be stable. In this paper, additional criteria which do guarantee stable controllers are derived for a general class of second- and third-order systems. A numerical example is presented.Keywords
This publication has 4 references indexed in Scilit:
- Gain and phase margin for multiloop LQG regulatorsIEEE Transactions on Automatic Control, 1977
- Feedback control systems with low-frequency stochastic disturbancesInternational Journal of Control, 1976
- Superiority of transfer function over state-variable methods in linear time-invariant feedback system designIEEE Transactions on Automatic Control, 1975
- The application of matrix methods to multi-variable control systemsJournal of the Franklin Institute, 1956