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Obtaining controller parameters for a new Smith predictor using autotuning. (English) Zbl 0971.93030

The paper is dedicated to the description of the structure of a new predictor for controlling stable, unstable and integrating processes. It has three controllers which are designed for different objectives. One in the inner loop is provided to stabilize an unstable or integrating process and modify the pole locations of the transfer function of the stable process. The other two controllers are then used to take care of servo-tracking and disturbance rejection by considering the inner loop as an open-loop stable process. The main contribution of the paper is that simple and effective automatic tuning formulae are derived for this predictor structure assuming a low-order model transfer function with time delay for stable, unstable and integrating processes.

MSC:

93B51 Design techniques (robust design, computer-aided design, etc.)
93D15 Stabilization of systems by feedback
93C73 Perturbations in control/observation systems
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