Multi-loop Internal Model Controller Design Based on a Dynamic PLS Framework

›› 2010, Vol. 18 ›› Issue (2): 277-285.

Multi-loop Internal Model Controller Design Based on a Dynamic PLS Framework

胡斌, 郑平友, 梁军

State Key Laboratory of Industrial Control Technology, Department of Control Science & Engineering, Zhejiang University, Hangzhou 310027, China

收稿日期:2009-07-13 修回日期:2010-02-10 出版日期:2010-04-28 发布日期:2010-04-28
通讯作者: LIANG Jun,E-mail:jliang@iipc.zju.edu.cn
基金资助:
Supported by the National Natural Science Foundation of China(60574047);the National High Technology Research and Development Program of China(2007AA04Z168,2009AA04Z154);the Research Fund for the Doctoral Program of Higher Education in China(20050335018)

Multi-loop Internal Model Controller Design Based on a Dynamic PLS Framework

HU Bin, ZHENG Pingyou, LIANG Jun

State Key Laboratory of Industrial Control Technology, Department of Control Science & Engineering, Zhejiang University, Hangzhou 310027, China

Received:2009-07-13 Revised:2010-02-10 Online:2010-04-28 Published:2010-04-28
Supported by:
Supported by the National Natural Science Foundation of China(60574047);the National High Technology Research and Development Program of China(2007AA04Z168,2009AA04Z154);the Research Fund for the Doctoral Program of Higher Education in China(20050335018)

摘要/Abstract

摘要： In this paper,a multi-loop internal model control(IMC) scheme in conjunction with feed-forward strategy based on the dynamic partial least squares(DyPLS) framework is proposed.Unlike the traditional methods to decouple multi-input multi-output(MIMO) systems,the DyPLS framework automatically decomposes the MIMO process into a multi-loop system in the PLS subspace in the modeling stage.The dynamic filters with identical structure are used to build the dynamic PLS model,which retains the orthogonality among the latent variables.To address the model mismatch problem,an off-line least squares method is applied to obtain a set of optimal filter parameters in each latent space.Without losing the merits of model-based control,a simple and easy-tuned IMC structure is readily carried over to the dynamic PLS control framework.In addition,by projecting the measurable disturbance into the latent subspace,a multi-loop feed-forward control is yielded to achieve better performance for disturbance rejection.Simulation results of a distillation column are used to further demonstrate this new strategy outperforms conventional control schemes in servo behavior and disturbance rejection.

关键词: internal model controller, partial least squares, latent subspace, servo behavior, disturbance rejection

Abstract: In this paper,a multi-loop internal model control(IMC) scheme in conjunction with feed-forward strategy based on the dynamic partial least squares(DyPLS) framework is proposed.Unlike the traditional methods to decouple multi-input multi-output(MIMO) systems,the DyPLS framework automatically decomposes the MIMO process into a multi-loop system in the PLS subspace in the modeling stage.The dynamic filters with identical structure are used to build the dynamic PLS model,which retains the orthogonality among the latent variables.To address the model mismatch problem,an off-line least squares method is applied to obtain a set of optimal filter parameters in each latent space.Without losing the merits of model-based control,a simple and easy-tuned IMC structure is readily carried over to the dynamic PLS control framework.In addition,by projecting the measurable disturbance into the latent subspace,a multi-loop feed-forward control is yielded to achieve better performance for disturbance rejection.Simulation results of a distillation column are used to further demonstrate this new strategy outperforms conventional control schemes in servo behavior and disturbance rejection.

Key words: internal model controller, partial least squares, latent subspace, servo behavior, disturbance rejection

胡斌, 郑平友, 梁军. Multi-loop Internal Model Controller Design Based on a Dynamic PLS Framework[J]. , 2010, 18(2): 277-285.

HU Bin, ZHENG Pingyou, LIANG Jun. Multi-loop Internal Model Controller Design Based on a Dynamic PLS Framework[J]. , 2010, 18(2): 277-285.

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Multi-loop Internal Model Controller Design Based on a Dynamic PLS Framework

Multi-loop Internal Model Controller Design Based on a Dynamic PLS Framework

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