Design of Linear Model Following Controller using the Plant Output

플랜트 출력을 이용한 선형모델 추종기 설계

  • 조내수 (경북대학교 전자전기컴퓨터학부) ;
  • 윤경섭 (도립거창대학 정보전자과) ;
  • 최연호 (경일대학교 제어전기공학부) ;
  • 권우현 (경북대학교 전자전기컴퓨터학부)
  • Published : 2009.07.01


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.



  1. J. S. Yu, S. H. Kim, B. B. Lee, C. Y Won, and J. Hur, 'Fuzzlogic-based vector control scheme for permanent-magnet synchronous motors in elevator drive applications,'IEEE transactions on Industrial Electronics, vol. 54 Issue 4, Aug. pp.2190-2200,2007
  2. G Franklin and J. D. Powell, Abbas Emami-Naeini, Feedback Control of Dynamic Systems, 5th Ed., Prentice hall, 2006
  3. K. J. Astrom and T. Hagglund, 'Automatic tuning of PID controllers,' Instrument Society of America, 1988
  4. K. Furuta and K. Komiya, 'Design of model following controller,' IEEE Transactions on AC-27, no. 3, pp. 725-727, June, 1982
  5. 윤경섭, 이치환, 권우현, '직류전동기에서 저주파 부하외란에 강인한 선형 모델추종제어기 설계,' 전자공학회논문지 35권 T편, 1호, pp82-89, June 1998
  6. H. J. Wu and Y. Y .Tzou, 'LGG/LTR robust control of an AC Induction servo drive,' IEEE PESC conference, pp. 613-619,1991
  7. K. C. Hong and K. H. Nam, 'A load torqeu compensation scheme under the speed measurement delay,'IEEE Transactions on industrial electronics, vol. 45, no. 2, April 1998