Semi-active vibration isolation control for multi-degree-of-freedom structures

Hidekazu Nishimura, Yasuhiko Okumura, Seiji Shimodaira

Research output: Contribution to journalConference articlepeer-review

1 Citation (Scopus)


In this paper, we propose a design method of a controller for semi-active vibration isolation. We introduce a mechanism of a semi-active damper, which can change the damping in the ratio of the orifice area, in order to obtain the parameter-varying system model. Consideration of the semi-active damper mechanism is appropriate for the design of the gain-scheduled (GS) controller based on linear matrix inequalities (LMIs). The GS controller consists of four-vertex linear time-invariant controllers are obtained by the convex interpolation of these controllers. The designed controller switches at zero velocity of the damper and varies according to both the orifice area and the relative velocity of the isolation layer. By carrying out simulations, it is shown that our proposed method is effective for the suppression of seismic response.

Original languageEnglish
Pages (from-to)189-196
Number of pages8
JournalAmerican Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP
Issue number2
Publication statusPublished - 2002 Oct 12
Externally publishedYes
EventSeismic Engineering -2002- (2002 ASME Prssure Vessels and Piping Conference) - Vancouver, BC, Canada
Duration: 2002 Aug 52002 Aug 9

ASJC Scopus subject areas

  • Mechanical Engineering


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