Sequential design of decentralized control systems

Viswanadham, N. ; Taylor, James H. (1988) Sequential design of decentralized control systems International Journal of Control, 47 (1). pp. 257-279. ISSN 0020-7179

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Our main result is a new sequential method for the design of decentralized control systems. Controller synthesis is conducted on a loop-by-loop basis, and at each step the designer obtains an explicit characterization of the class C of all compensators for the loop being closed that results in closed-loop system poles being in a specified closed region D of the s-plane, instead of merely stabilizing the closed-loop system. Since one of the primary goals of control system design is to satisfy basic performance requirements that are often directly related to closed-loop pole location (bandwidth, percentage overshoot, rise time, settling time), this approach immediately allows the designer to focus on other concerns such as robustness and sensitivity. By considering only compensators from class C and seeking the optimum member of that set with respect to sensitivity or robustness, the designer has a clearly-defined limited optimization problem to solve without concern for loss of performance. A solution to the decentralized tracking problem is also provided. This design approach has the attractive features of expandability, the use of only ‘local models’ for controller synthesis, and fault tolerance with respect to certain types of failure.

Item Type:Article
Source:Copyright of this article belongs to Taylor and Francis Ltd.
ID Code:97794
Deposited On:13 Nov 2013 10:17
Last Modified:13 Nov 2013 10:17

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