NDLI: A new QFT design method for SISO cascaded-loop design

Content Provider	IEEE Xplore Digital Library
Author	Wei Wu Jayasuriya, S.
Copyright Year	2000
Description	Author affiliation: Dept. of Mech. Eng., Texas A&M Univ., College Station, TX, USA (Wei Wu)
Abstract	A quantitative feedback theory (QFT) design method for SISO cascaded-loop design which is different from the conventional inner-outer procedure and the outer-inner procedure is proposed in this paper. The desired uncertainty of the inner loop after closure is prescribed as a design specification before designing the inner controller, which is done by introducing an appropriate weight function. The inner loop design is therefore transferred into a sensitivity reduction problem. Then, the outer loop design becomes that of a plant with mixed uncertainty which can be carried out as usual. In this method, the weight function is an important design factor, which actually allocates the control burden between the inner and outer controllers. This method not only removes the arbitrariness in the closure of the inner loop in the inner-outer procedure, but also alleviates unnecessary iterations in the outer-inner procedure, which therefore could reduce the outer controller bandwidth drastically as demonstrated in two examples.
Starting Page	3827
Ending Page	3831
File Size	390657
Page Count	5
File Format	PDF
ISBN	0780355199
ISSN	07431619
DOI	10.1109/ACC.2000.876938
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2000-06-28
Access Restriction	Subscribed
Rights Holder	American Automatic Control Council(AACC)
Subject Keyword	Design methodology Uncertainty Bandwidth Control systems Feedback loop Mechanical engineering
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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