An ℋ control system design method for parameter sensitivity reduction

Keiji Ohkubo, Kazuhiko Aoki, Hiromitsu Ohmori, Akira Sano

Research output: Contribution to journalArticlepeer-review


There are two types of uncertainty in a system to be controlled: parameter errors and unstructured uncertainty. Conventional ℋ control synthesis in the presence of unstructured uncertainty has been developed on the basis of frequency‐domain criteria using the state‐space method. It is difficult to consider the sensitivity to parameter errors in the frequency domain, however. In this paper, the authors propose an ℋ controller design method which can cope with parameter errors by introducing a trajectory sensitivity model into the conventional ℋ controller design method. It is also shown that the obtained controller is equivalent to a dynamic state feedback controller whose order becomes high. Thus, controller reduction is adopted.

Original languageEnglish
Pages (from-to)75-84
Number of pages10
JournalElectronics and Communications in Japan (Part III: Fundamental Electronic Science)
Issue number2
Publication statusPublished - 1993


  • parameter error
  • robust control
  • sensitivity
  • trajectory sensitivity
  • ℋ control

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


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