Abstract—In this paper a new approach to design and analyze Smith predictors with fractional PIλ Dμ controllers for time delay systems is presented. Since the fractional controller has been used in Smith predictor scheme, delay component can be eliminated from the closed-loop characteristic equation which is of fractional order. Simulation results demonstrate the successful performance of the proposed controller. Stability analysis of the closed–loop system in time domain shows the validity of the results.

Index Terms—fractional order controller, Smith predictor.

Khosro Khandani is with the Electrical Engineering Department, Iran University of Science and Technology (IUST), Tehran, Iran (phone: +98-9144172814 ; e-mail: khosro.khandani@gmail.com).
Ali A. Jalali was with West Virginia University, USA. He is now with the Department of Electrical Engineering, Iran University of Science and Technology, Tehran, Iran (e-mail: ajalali@iust.ac.ir).

Cite: Khosro Khandani and Ali Akbar Jalali, "A New Approach to Design Smith Predictor Based Fractional Order Controllers," International Journal of Computer and Electrical Engineering vol. 2, no. 4, pp. 698-703, 2010.