大きなむだ時間を有する非線形プロセスに対する非線形状態予測スライディングモード制御とその応用(機械力学,計測,自動制御)

概要

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This paper presents a new control system based on sliding-mode control (SMC) for large-scale processes with large time delay and nonlinearity. The proposed control system consists of a gainscheduled sliding-mode controller and a nonlinear state predictor, all predicted states after time delay will be locked in a future sliding-mode after time delay by switching of the controller. A model of complex nonlinear processes is defined as the set of simple linear systems (first order lag and time delay with time-varying parameters) under preset process conditions. The advantages of the proposed method are 1) good transient characteristics by one-degree-of-freedom control system, 2) high robust performance against an unknown disturbance, and 3) simplicity in designing for such processes. The proposed method does not need complex calculation or optimization like nonlinear model predictive control. Experimental results illustrate the effectiveness of the proposed method with applying to a CZ (Czochralski) silicon single crystal puller with large time delay 30 minutes.
社団法人日本機械学会の論文
2008-08-25