Zaman gecikmeli sistemlerin merkezi olmayan denetimi

In this thesis, decentralized controller design for time-delay systems is considered. A necessary and sufficient condition, in terms of decentralized fixed modes, for stabilizability of linear time-invariant (LTI) time-delay systems by LTI time-delay controllers is given. Also, it is presented that a LTI time-delay system can be stabilized by a LTI decentralized time-delay controller if and only if it can be stabilized by a LTI decentralized finite-dimensional controller. This condition extends a previously known fact for centralized control to decentralized control. Although stabilizability problem is considered in a large perspective which includes neutral and retarded systems with commensurate- and incommensurate-time-delays, decentralized controller design problem is considered only for retarded commensurate-time-delay systems. At first, to be used as a centralized controller design algorithm, the continuous pole assignment algorithm is extended to design dynamic output feedback controllers. Then, based on the decentralized pole placement algorithm, two decentralized controller design algorithms are proposed. One of these algorithms is a dynamic output feedback and the other algorithm is an observer based state vector feedback design algorithm.