Smith Predictor with sliding mode control for processes with large dead times

Utkal Mehta – Ibrahim Kaya

   The paper discusses the Smith predictor scheme with Sliding Mode Controller (SP-SMC) for processes with large dead times. This technique gives improved load-disturbance rejection with optimum input control signal variations. A power rate reaching law is incorporated in the sporadic part of sliding mode control such that the overall performance recovers meaningfully. The proposed scheme obtains parameter values by satisfying a new performance index which is based on bi-objective constraint. In simulation study, the efficiency of the method is evaluated for robustness and transient performance over reported techniques.

Keywords: large dead time, Smith predictor, sliding mode, control input

[full-paper]