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DESIGN OF SIMPLIFIED DECOUPLING SMITH CONTROL SCHEME FOR MULTIVARIABLE PROCESS WITH MULTIPLE TIME DELAYS

In this paper, a decoupler is first introduced into the multivariable Smith predictor control system by a well-known approach of simplified decoupling, which is compactly extended for general nxn multivariable processes. Accordingly, the transfer functions of the decoupled apparent processes are derived as a ratio of the original open-loop transfer function to the diagonal element of the dynamic relative gain array (DRGA) for reducing the interaction between different control loops. In addition, the multivariable Smith predictor controller is obtained in
terms of the multiple single-loop Smith predictor controllers. Many multivariable industrial processes are employed to demonstrate the simplicity and effectiveness of the proposed method.

Từ khóa: Decoupling control, Simplified decoupling, PI/PID controller, Smith predictor

7 p ovanketv4 19/12/2016 584 2

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