吉林大学学报(工学版) ›› 2004, Vol. ›› Issue (2): 277-281.

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Design of proportional-integral observer and its application in control law with fault compensation and disturbance rejection

WANG Zhan-shan, ZHANG Hua-guang   

  1. College of Information Science and Engineering, Northeastern University, Shenyang 110004, China
  • Received:2003-09-27 Online:2004-04-01

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Abstract: A full-order proportional-integral observer is designed based on LMI(Linear matrix inequality) and a control law with fault compensation and disturbance rejection is proposed. In an L2-gain sense of the disturbance, an action of disturbance rejection is included in the observer in order to suppress the effect of disturbance on the estimation of state and satisfy the given H∞ performance. Then in the case of existing of both faults and disturbances, a hybrid control law is designed, which consists of actions of both fault estimation and disturbance rejection, to make the system track the given reference model. Thus in the case of fault, the system not only can give fault estimation, but also keep the system perform well and prevent the control performance worsening. At last, an illustrative design example is employed to demonstrate the effectiveness of the proposed approach.

Key words: fault estimation, disturbance rejection, proportional-integral observer, compensation control, LMI

CLC Number: 

  • V249
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