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Vol. 165, Issue 2, February 2014, pp. 96-101

 

Bullet

 

Modified Internal Model Control for Non-square Systems Based on Smith Delay Compensator Control
 

Jianchang Liu, Nan Chen, Xia Yu, Shubin Tan

School of Information Science and Technology, Northeastern University, Shenyang, 110819, China

E-mail: yuxia@ise.neu.edu.cn

 

Received: 24 October 2014 /Accepted: 28 January 2014 /Published: 28 February 2014

Digital Sensors and Sensor Sysstems

 

Abstract: A modified internal model control method based on static decoupling for non- square processes with right half plant zeros and multiple time delays is proposed. The coupled problems of non-square processes are solved by used pseudo-inverse of steady-state gain matrix. Internal model controller is also applied to Smith delay compensator directly by using equivalence between internal model control structure and Smith delay compensator structure. Thus, eliminating the step of convert internal model controller into PI controller, while reducing the number of controller parameters. The controller design of the proposed method is more direct and simple, at the same time it has a wider range of applications. At last, the simulation results demonstrate the effectiveness of proposed method.

 

Keywords: Non-square processes, Internal model control, Smith control, Static decoupling.

 

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