QFT design for uncertain non-minimum phase and unstable plants revisited
journal contributionposted on 2008-11-03, 16:37 authored by Wen-Hua ChenWen-Hua Chen, Donald J. Ballance
Design method for uncertain non-minimum phase and unstable plants in the Quantita- tive Feedback Theory (QFT) developed by Horowitz and Sidi (Horowitz and Sidi, 1978; Horowitz, 1992) is revisited in this paper. It is illustrated that the existing method may not work since some design rules have not been clearly speci¯ed by several exam- ples including non-minimum phase plants and unstable plants. Then stability of a new nominal plant is carefully examined and analysed, and an improved design method is presented. The result in this paper provides mathematical justi¯cation of the QFT de- sign procedure for non-minimum phase and unstable plants in Horowitz and Sidi (1978) and Horowitz (1992).
- Aeronautical, Automotive, Chemical and Materials Engineering
- Aeronautical and Automotive Engineering
CitationCHEN, W-H. and BALLANCE, D. J., 2001. QFT design for uncertain non-minimum phase and unstable plants revisited. International journal of control, 74 (9), pp.957-965
Publisher© Taylor & Francis
NotesThis is a journal article. It was published in the journal, International journal of control [© Taylor & Francis] and the definitive version is available at: http://www.informaworld.com/openurl?genre=article&issn=0020-7179&volume=74&issue=9&spage=957