H∞ DIA control of a magnetic suspension system using μ-synthesis

Toru Namerikawa, Hiroki Seto

Research output: Contribution to journalArticlepeer-review


This paper deals with H∞ DIA control of a magnetic suspension system using μ-synthesis. H∞ DIA control is a H∞ control problem which treats a mixed Disturbance and an Initial-state uncertainty Attenuation (DIA) and supplies H∞ controls with good transients. H∞ DIA controller has a good initial response property, however its robust performance can be improved. We propose a novel control problem which is to find a multi-objective controller to achieve H∞ DIA condition for good initial responses/transient responses and the structured singular value μ condition for robust performance. We apply this proposed approach to a magnetic suspension system, and design a robust controller which has both good transient and robust performance properties. Finally, experimental results show effectiveness of the proposed control system design framework.

Original languageEnglish
Pages (from-to)2509-2516
Number of pages8
JournalNihon Kikai Gakkai Ronbunshu, C Hen/Transactions of the Japan Society of Mechanical Engineers, Part C
Issue number8
Publication statusPublished - 2005 Aug
Externally publishedYes


  • D-K Iteration
  • H∞ DIA Control
  • Magnetic Suspension System
  • Robust Performance
  • Transient Response
  • μ-Synthesis

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Industrial and Manufacturing Engineering


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