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		Yiqun YANG;Guobo XIANG.[en_title][J].Control Theory and Technology,2007,5(2):207~210.[Copy]

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YiqunYANG;GuoboXIANG
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Received:October 26, 2006Revised:March 18, 2007

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Global satisfactory control for nonlinear integrator processes with long delay

Yiqun YANG;Guobo XIANG

(School of Mechanical and Automation Engineering, Shanghai Institute of Techology, Shanghai 200235,China; Automation College, Wuhan University of Technology, Wuhan Hubei 430070, China)

Abstract:

Integrator processes with long delay are difficult to control. Nonlinear characteristics of actuators make the control problem more challenging. A technique is proposed in this paper for global satisfactory control (GSC) of such processes with relay-type nonlinearity. An oscillatory control signal is injected into the nonlinear process; the amplitude and frequency of the oscillatory signal are designed to linearise the nonlinear process in the sense of harmonic analysis; and a state feedback controller is configured to implement GSC over the linearised process. An illustrative example is given to demonstrate the effectiveness of the proposed method.

Key words: Integrator processes Time delay Oscillation Harmonic linearisation Global satisfactory control