New formulations for quantitative feedback theory

R. E. Nordgren, O. D.I. Nwokah, Matthew Franchek

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Scopus citations


New formulations are presented for quantitative feedback theory that do not require the direct manipulation of templates in the classical sense. This enables the explicitly incorporation of high frequency unstructured uncertainty into the problem statement, and allows for constructive existence conditions for the solvability of the QFT problem. Necessary and sufficient conditions for robust stability and robust performance are presented for plants with both parametric and high frequency unstructured uncertainty, that parallel their corresponding H counterparts. This work extends the recent contribution of Jayasuriya and Zhao to plants with more general non-minimum phase characteristics such as RHP poles and zeros and time delays.

Original languageEnglish (US)
Title of host publicationAmerican Control Conference
Editors Anon
PublisherInstitute of Electrical and Electronics Engineers Inc.
Number of pages5
ISBN (Print)0780308611
StatePublished - Dec 1 1993
EventProceedings of the 1993 American Control Conference Part 3 (of 3) - San Francisco, CA, USA
Duration: Jun 2 1993Jun 4 1993


OtherProceedings of the 1993 American Control Conference Part 3 (of 3)
CitySan Francisco, CA, USA

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


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