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http://dx.doi.org/10.5302/J.ICROS.2009.15.7.661

Design of Linear Model Following Controller using the Plant Output  

Cho, Nae-Soo (경북대학교 전자전기컴퓨터학부)
Youn, Kyung-Sup (도립거창대학 정보전자과)
Choi, Youn-Ho (경일대학교 제어전기공학부)
Kwon, Woo-Hyen (경북대학교 전자전기컴퓨터학부)
Publication Information
Journal of Institute of Control, Robotics and Systems / v.15, no.7, 2009 , pp. 661-666 More about this Journal
Abstract
The linear model following controller(LMFC) scheme controls a plant based on the output of a reference model, thereby replacing a PI controller that has better time response characteristics, which are irrelevant to the structural perturbation of a plant. However, the main weakness of the LMFC scheme is a slow response time to load changes. Thus, to solve this problem, a robust linear model following controller(RMFC) was developed that is robust in load changes. However, when compared with the LMFC scheme, the RMFC scheme has a weaker performance in the case of system parameter changes. Therefore, this paper presents a new LMFC scheme, where the controller is designed based on the output of a plant rather than the output of a model, as in the case of the conventional LMFC scheme. As a result, in the case of load changes, the response characteristics of the proposed scheme are slower than those of the RMFC scheme, yet laster than those of the conventional LMFC scheme, however, for parameter changes, the proposed scheme has a superior performance over the RMFC scheme. The usefulness of the proposed LMFC scheme is verified through a comparison using MATLAB/SIMULINK.
Keywords
PI controller; LMFC; RMFC;
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