Dynamic output-feedback H control for active half-vehicle suspension systems with time-varying input delay

Hyun Duck Choi, Choon Ki Ahn, Myo Taeg Lim, Moon Kyou Song

Research output: Contribution to journalArticlepeer-review

77 Citations (Scopus)


This paper addresses the new output-feedback H control problem for active half-vehicle suspension systems with time-varying input delay. By introducing multi-objective synthesis, a new dynamic output-feedback H controller is designed such that the closed-loop suspension system is asymptotically stable with guaranteed robust performance in the H sense. The proposed controller is formulated in terms of linear matrix inequality (LMI) based on the auxiliary function-based integral inequality method and the reciprocally convex approach. A new delay-dependent sufficient condition for the desired controller offers a wider range of control input delay. Numerical examples are provided to validate the effectiveness of the proposed design method.

Original languageEnglish
Pages (from-to)59-68
Number of pages10
JournalInternational Journal of Control, Automation and Systems
Issue number1
Publication statusPublished - 2016 Feb 1

Bibliographical note

Funding Information:
Recommended by Guest Editors PooGyeon Park and Ju H. Park. This research was supported in part by General Research Program through NRF grant funded by the Ministry of Education (NRF-2013R1A1A2008698), in part by NRF through the Ministry of Science, ICT, and Future Planning under Grant NRF- 2014R1A1A1006101, in part by the R&D Program of MOTIE/KEIT, Korea, granted financial resource from the Minis-try of Trade, Industry and Energy, Korea. (No: 10041779, Development of Energy Demand Response System for Smart Home), and in part by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (NRF-2013R1A1A2060663).

Publisher Copyright:
© 2016, Institute of Control, Robotics and Systems and The Korean Institute of Electrical Engineers and Springer-Verlag Berlin Heidelberg.


  • H control
  • Half-vehicle suspension system
  • multi-objective synthesis
  • time-varying input delay

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Computer Science Applications


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