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A Novel Method for the Control of Plants with actuator Saturation Nonlinearities
Author(s) -
Gu DanYing,
Cai YunZe,
Zhang WeiDong
Publication year - 2005
Publication title -
developments in chemical engineering and mineral processing
Language(s) - English
Resource type - Journals
eISSN - 1932-2143
pISSN - 0969-1855
DOI - 10.1002/apj.5500130313
Subject(s) - control theory (sociology) , compensation (psychology) , saturation (graph theory) , control engineering , controller (irrigation) , linearity , computer science , actuator , simple (philosophy) , engineering , control (management) , electronic engineering , mathematics , epistemology , combinatorics , artificial intelligence , psychoanalysis , biology , psychology , agronomy , philosophy
The objective of this paper is to develop a simple and practical anti‐windup controller for systems with saturation non‐linearity. Most present methods are based on the idea that when the controller output differs from the plant input, then corrective feedback is employed to reduce the discrepancy. Alternatively, some recent design methods propose that the saturation can be avoided by directly making the controller output in a permissible range. This paper will give such a scheme. It is essentially a modification, or compensation, to existing controllers that can be designed in various ways for linear systems. The scheme is realized by adding a filter to the controller, and is tuned only for a few parameters in order to cope with the saturation. It is simple and efficient in practical applications. Illustrative examples are provided to show the advantage of the proposed method.