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Beyond the linear limitations by combining switching and QFT: Application to wind turbines pitch control systems
Author(s) -
GarciaSanz Mario,
Elso Jorge
Publication year - 2008
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/rnc.1319
Subject(s) - robustness (evolution) , control theory (sociology) , quantitative feedback theory , robust control , pitch control , computer science , wind power , linear system , control engineering , reliability (semiconductor) , stability (learning theory) , transient response , controller (irrigation) , control system , control (management) , engineering , mathematics , power (physics) , artificial intelligence , mathematical analysis , chemistry , biology , biochemistry , quantum mechanics , machine learning , agronomy , physics , electrical engineering , gene
Abstract This paper introduces a methodology to design a family of robust controllers able to go beyond the classical linear limitations. Combining robust designs and stable switching, the new controllers optimize the time response of the system by fast adaptation of the controller parameters during the transient response according to certain rules based on the amplitude of the error. The methodology is based on both a new graphical stability criterion for switching linear systems and the robust quantitative feedback theory (QFT). It is applied to the design of a pitch control system, which is one of the most critical issues in wind turbines, where a tight combination of high reliability (robustness), minimum mechanical fatigue and performance optimization is required. Copyright © 2008 John Wiley & Sons, Ltd.