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Control limits consideration in discrete control system design

Control limits consideration in discrete control system design

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Consideration of control limits in the design of discrete control system and their impact on system performance is discussed in this paper. The mechanism of how the control limits influence the closed loop system behaviour is investigated using an approach different from that commonly adopted in the literature. Theoretical analysis in this paper reveals the effect of control limits in the form of a short-term behaviour of the controlled system. This phenomenon is investigated by introducing a concept of ‘short-term behaviour index’. With the introduction of ‘dynamic control limits’, an effective discrete control system design method is proposed to handle this problem.

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