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Quantitative Feedback Theory (QFT) and Robust Control

Doyle, John C. (1986) Quantitative Feedback Theory (QFT) and Robust Control. In: 1986 American Control Conference. NJ , Piscataway, NJ, pp. 1691-1698.

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QFT, a theory developed by Horowitz [H3], is claimed by its advocates to provide a complete and general treatment of feedback design for highly uncertain multi-input-output (MIMO) systems. This paper reviews QFT and shows that while the philosophy behind QFT is attractive, the claims for the theory are unjustified. In particular, counterexamples are given for the main theorem of QFT on which the claims are based. This is in spite of the severe assumptions (no rhp zeros and fixed relative degree) that QFT requires on the plant model.

Item Type:Book Section
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Doyle, John C.0000-0002-1828-2486
Additional Information:© 1986 IEEE.
Record Number:CaltechAUTHORS:20170718-173812529
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Official Citation:J. C. Doyle, "Quantitative Feedback Theory (QFT) and Robust Control," 1986 American Control Conference, Seattle, WA, USA, 1986, pp. 1691-1698.
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:79176
Deposited On:19 Jul 2017 16:49
Last Modified:03 Oct 2019 18:17

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