Browsing by Subject "System Stability"

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    Decentralized Control: A Stable Proper Fractional Approach
    (1990) Özgüler, B.
    Three decentralized control problems are considered in a fractional setup for two-channel multivariable systems. The problems are: i) making the system stabilizable and detectable through the first channel via dynamic output feedback around the second channel, ii) the first problem with the constraint of internal stability, and iii) the decentralized stabilization problem. It turns out that all three problems are equivalent as far as the solvability conditions are concerned. A characterization of all solutions in each case is given. The results in this paper apply to a class of systems having fractional representations over an arbitrary principal ideal domain. © 1990 IEEE
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    Decentralized Multirate Control
    (Institute of Electrical and Electronics Engineers, 1990) Sezer, M. E.; ŝiljak, D. D.
    The objective of this note is to introduce a decentralized control approach to multirate linear systems. Each control channel is assigned a single sampling rate, which provides simplicity in design of local controllers. This control strategy is natural for plants with widely different characteristic frequencies, and suitable for implementation using multiprocessor schemes. © 1990 IEEE
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    Reliable Decentralized Stabilization of Feedforward and Feedback Interconnected Systems
    (1992) Ünyelioğlu, K.A.; Bülent Özgüler, A.
    Synthesis of decentralized controllers that are reliable in the presence of breakdowns in the interconnections are considered for plants obtained via feedforward and feedback type interconnection schemes. The main objective is to determine the precise conditions on the plant which assure such reliable synthesis. It is shown that the central property for reliable decentralized stabilization is always an appropriate parity interlacing property among the poles of the interconnection subplants and certain blocking zeros of the overall plant. The conditions under which the stabilization of a two-channel plant is affected by the stabilization of its diagonal subplants are also obtained. The results also find application in multiple controller reliable synthesis problems. The discussion is restricted to two-channel plants. © 1992 IEEE