Design of a robust voltage controller for a buck-boost converter using μ-synthesis

被引：59

作者：

Buso, S ^{[1
]}

机构：

[1] Univ Padua, Dept Elect & Informat, I-35131 Padua, Italy

来源：

IEEE TRANSACTIONS ON CONTROL SYSTEMS TECHNOLOGY | 1999年 / 7卷 / 02期

关键词：

DC-DC power conversion; H-infinity control; H-infinity optimization; robustness; uncertain systems;

D O I：

10.1109/87.748148

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

This paper proposes the structured singular value (mu) approach to the problem of designing an output voltage regulator for a Buck-Boost converter with current-mode control. This approach allows a quantitative description of the effects of reactive components' tolerances and operating point variations, which strongly affect the converter dynamics, At first, a suitable linear converter model is derived, whose parameter variations are described in terms of perturbations of the linear fractional transformation (LFT) class. Then, mu-analysis is used to evaluate the robustness of a conventional PI voltage regulator with respect to the modeled perturbations. Finally, the approximate mu-synthesis procedure known as D-K iteration is used to design a robustly performing regulator. Simulation results are presented, describing the small and large signal behavior of a reduced order approximation of the mu-synthesized controller.

引用

页码：222 / 229

页数：8

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