Control of stable, integrating and unstable processes by the Modified Smith Predictor |
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Authors: | Miroslav R. Matau&scaron ek,Aleksandar I. Ribi? |
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Affiliation: | a Faculty of Electrical Engineering, University of Belgrade, Serbia b Institute Mihajlo Pupin, 11060 Belgrade, Serbia |
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Abstract: | The Modified Smith Predictor (MSP) is designed, and in the literature classified, as a Dead-Time Compensator for integrating processes. In the present paper it is shown that the MSP is a PID controller in series with a second-order filter, defined by the dead-time and an adjustable parameter. Optimization of the regulatory performance of this controller is performed under constraints on the robustness and sensitivity to measurement noise. Excellent performance/robustness tradeoff is obtained for stable, integrating and unstable processes, including dead-time, as confirmed by simulations and by experimental result obtained on a laboratory thermal process. |
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Keywords: | Dead-Time Compensators PID control Robustness Load and noise disturbance |
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