Title :
Digital Control Design for Systems with Approximate Decentralized Fixed Modes
Author :
Aghdam, Amir G. ; Davison, Edward J.
Author_Institution :
Dept. of Electr. & Comput. Eng., Concordia Univ., Montreal, Que.
Abstract :
In this paper, the digital control of decentralized continuous-time systems, which have approximate decentralized fixed modes, is studied. It is shown that under some conditions, discrete-time controllers can improve the overall performance of the decentralized control system, when a linear time-invariant continuous-time controller is ineffective. In order to obtain these conditions, a quantitative measure for different types of fixed modes in a decentralized system is given. In this case, it is shown that generalized sampled-data hold functions (GSHF) instead of a simple zero-order hold (ZOH), in the implementation of the digital controllers, can significantly improve the overall performance of the resultant closed-loop system. The proposed sampled-data controller is, in fact, a linear time-varying controller for the continuous-time system
Keywords :
closed loop systems; continuous time systems; digital control; discrete time systems; linear systems; multivariable systems; sampled data systems; time-varying systems; approximate decentralized fixed modes; closed-loop system; decentralized continuous-time systems; digital control design; discrete-time control; generalized sampled-data hold functions; linear time-varying controller; sampled-data controller; Control systems; Design for manufacture; Digital control; Distributed control; Educational institutions; Nonlinear control systems; Output feedback; Sampling methods; Time varying systems; USA Councils;
Conference_Titel :
Decision and Control, 2006 45th IEEE Conference on
Conference_Location :
San Diego, CA
Print_ISBN :
1-4244-0171-2
DOI :
10.1109/CDC.2006.377025
