QFT design for uncertain non-minimum phase and unstable plants revisited
Wen-Hua Chen
Donald J. Ballance
2134/3858
https://repository.lboro.ac.uk/articles/journal_contribution/QFT_design_for_uncertain_non-minimum_phase_and_unstable_plants_revisited/9227108
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).
2008-11-03 16:37:19
Robust Control
Frequency Domain
Quantitative Feedback Theory (QFT)
Non-minimum Phase System
Unstable Systems
Robust Stability
Mechanical Engineering
Engineering not elsewhere classified