Yu, R.Sezer, M. E.Gao, W.2016-02-082016-02-0819930167-6911http://hdl.handle.net/11693/26085The new concepts of the decentralized output feedback variable polynomial, the decentralized output feedback cycle index of general proper systems, and the geometric multiplicities of decentralized fixed modes are introduced. Their computational methods and some algebraic properties are presented. It is shown that the decentralized output feedback cycle index of a general proper system is equal to one when the system has no fixed modes or equal to the maximum of the geometric multiplicities of its decentralized fixed modes. It is also shown that almost all decentralized output feedback can be used to make the zeros of the decentralized variable polynomial distinct, and disjoint from any given finite set of points on the complex plane.EnglishAlgebraic propertiesControl system analysisDecentralized systemsFixed modesOutput feedbackComputational methodsConstraint theoryControl system analysisDescribing functionsPoles and zerosPolynomialsState estimationState space methodsAlgebraic propertiesDecentralized systemsFixed modesGeneral proper decentralized systemOutput feedbackDistributed parameter control systemsArticle10.1016/0167-6911(93)90034-4