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http://dx.doi.org/10.7471/ikeee.2017.21.4.424

A Design of Disturbance Observer to Improve of Disturbance Response for Time Delay Systems  

Lee, Soon-Young (Dept. of Electrical Engineering, Gyeongsang National University, RIGET)
Publication Information
Journal of IKEEE / v.21, no.4, 2017 , pp. 424-427 More about this Journal
Abstract
Smith predictor can't be applied to the time delay systems that have poles near the origin or a pure integrator or a modeling error, because of occurring the steady state error for the step disturbance. In this paper, a new Smith predictor controller for these systems is designed to eliminate the effects of the disturbance. A disturbance observer to estimate a disturbance is proposed and a new controller is designed using the estimated disturbance. As a result, the new controller can eliminate the effects of the disturbance and modeling error. The simulation results for the steam superheater and the steam pressure systems verify the efficiency of the proposed controller.
Keywords
Smith predictor; time delay; disturbance; disturbance observer; modeling error;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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