Title :
Decentralized control of nonlinear interconnected systems
Author :
Kalsi, Karanjit ; Lian, Jianming ; Zak, Stanislaw H.
Author_Institution :
Sch. of Electr. & Comput. Eng., Purdue Univ., West Lafayette, IN
Abstract :
The asymptotic stabilization problem of a class of large-scale interconnected systems is considered where the nonlinear interconnections between subsystems are considered to be unknown and satisfy quadratic constraints that are functions of the overall system´s state vector. A decentralized combined observer-controller compensator is proposed and analyzed, where the subsystems´ state vectors are estimated using local sliding mode observers. The sliding mode observers are also employed to reconstruct the unknown nonlinear interconnections. The closed-loop system driven by the proposed decentralized compensator is guaranteed to be asymptotically stable subject to two conditions that are easily verifiable. Simulation results illustrate the effectiveness of the proposed decentralized combined observer-controller compensator design algorithm.
Keywords :
asymptotic stability; closed loop systems; control system synthesis; decentralised control; interconnected systems; nonlinear control systems; observers; variable structure systems; asymptotic stabilization problem; closed-loop system; controller design; decentralized control; large-scale systems; nonlinear interconnected systems; nonlinear interconnections; observer-controller compensator; quadratic constraints; sliding mode observer; system state vector; Automatic control; Centralized control; Control systems; Distributed control; Interconnected systems; Large-scale systems; Observers; Power system control; Power system modeling; State estimation;
Conference_Titel :
Control and Automation, 2008 16th Mediterranean Conference on
Conference_Location :
Ajaccio
Print_ISBN :
978-1-4244-2504-4
Electronic_ISBN :
978-1-4244-2505-1
DOI :
10.1109/MED.2008.4602010
