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ALTERNATIVE APPROACHES IN FREQUENCY DOMAIN DESIGN OF SINGLE LOOP FEEDBACK SYSTEMS WITH PLANT UNCERTAINTY
Author(s) -
Bailey F. N.,
Helton J. William,
Merino Orlando
Publication year - 1997
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(199703)7:3<265::aid-rnc213>3.0.co;2-b
Subject(s) - frequency domain , computer science , control theory (sociology) , robust control , loop (graph theory) , function (biology) , transfer function , feedback loop , strengths and weaknesses , domain (mathematical analysis) , describing function , frequency response , loop gain , control (management) , control engineering , control system , engineering , mathematics , nonlinear system , artificial intelligence , philosophy , computer security , voltage , mathematical analysis , biology , epistemology , quantum mechanics , evolutionary biology , computer vision , physics , combinatorics , electrical engineering
The frequency domain design of robust feedback control systems involves the fitting of a designable complex function of frequency to specification/uncertainty derived constraints. At present there are two basically different approaches to these problems: the gain versus frequency approaches and the gain‐phase versus frequency approaches. Unfortunately, the commonalities, advantages and disadvantages of these approaches are not widely appreciated. In this paper we develop a common framework for examining these alternatives and use this framework to reveal some of their similarities, strengths and weaknesses. © 1997 by John Wiley & Sons, Ltd.