Abstract
This paper proposes a closed-loop compensation method to remove oscillations caused by control valve stiction. With the control loop operating at the auto mode, the proposed method adds a short-time rectangular wave to the reference to introduce two movements for the control valve to arrive at a desired position. A systematic way to design the parameters of the short-time rectangular wave is developed. The proposed method is robust against modeling errors and measurement noises. The effectiveness of the proposed method is illustrated by laboratory and simulation examples.
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