Recent work in Quantitative Feedback Theory (QFT) has extended the methodology to include a mathematically tractable formation which allows consideration of both parametric and non-parametric uncertain. An issue that remains largely unsolved isthat of constructive existence conditions for optimal QFT controllers. The methodology developed in Thompson and Nwokah (1994) was to build upon the classical Bode analysis of an acceptable initial QFT controller a priori; locally optimal constrainednonlinear programming algorithm. The primary purpose of this paper is to extend this methodology to the sensitivity-based, "new formulation" QFT bounds. This technique is demonstrated for the nonminimum-phase problem of Nordgren et al. (1994).
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