A Modified Internal Model Control for Unstable – Time Delayed System
Basil Hamed1, Walid Issa2
1Dr. Basil Hamed, is Associate Professor of Electrical Engineering Department, Islamic University of Gaza, Palestine.
2Eng.Walid Issa, is a research Assistant at Electrical Engineering Department, Islamic University of Gaza (IUG) Palestine.
Manuscript received on October 06, 2011. | Revised Manuscript received on October 12, 2011. | Manuscript published on October 30, 2011 . | PP: 56-62 | Volume-1 Issue-1, October 2011. | Retrieval Number: A0111101111/2011©BEIESP
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Abstract: A new approach of control design of internal model controller is proposed in this paper. The proposed design method focuses on modifying the old general structure of IMC and develops a new model structure while saving the same general concept of using the invertible version of the system in the controller design. The new approach combines the IMC structure and the traditional structure of a control problem and this demonstrates an excellent performance and behavior against different disturbance inputs and model uncertainty presented in model parameter mismatch. Beside that a smith predictor is added to promote the design to compensate the delayed time systems. Also a proposed stabilizer has mentioned to deal with unstable systems.
Keywords: IMC, Unstable, Time Delay, Pendulum System, Smith predictor.