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Dynamic anti‐windup method for a class of time‐delay control systems with input saturation
Author(s) -
Park JongKoo,
Choi ChongHo,
Choo Hyunseung
Publication year - 2000
Publication title -
international journal of robust and nonlinear control
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.361
H-Index - 106
eISSN - 1099-1239
pISSN - 1049-8923
DOI - 10.1002/(sici)1099-1239(200005)10:6<457::aid-rnc488>3.0.co;2-p
Subject(s) - control theory (sociology) , computer science , controller (irrigation) , saturation (graph theory) , control system , control (management) , control engineering , engineering , mathematics , agronomy , biology , electrical engineering , combinatorics , artificial intelligence
An anti‐windup‐based approach is newly attempted to deal with time‐delay control systems with input saturation. Following the anti‐windup paradigm, we assume that controllers have been designed beforehand for time‐delay control systems based on existing design techniques which will show desirable performance. Then, an additional compensator is designed to provide graceful performance degradation under control input saturation. By taking the difference of controller states in the absence and presence of input saturation as a performance index, a dynamic compensator which minimizes it is derived. The resulting anti‐windup compensator is expressed in plant and controller parameters. The proposed method not only provides graceful performance degradation, but also guarantees the stability of the overall systems. Illustrative examples are provided to show the effectiveness of the proposed method. Copyright © 2000 John Wiley & Sons, Ltd.