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Proceedings Paper

High-performance semiactive controller for structural vibration suppression
Author(s): James E. Bobrow; Faryar Jabbari
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Paper Abstract

This article presents an approach to vibration suppression that does not use a viscous damper. The actuator used behaves effectively as a spring with an adjustable unstressed length. By adjusting this unstressed length on-line from feedback, it is possible to obtain fast settling times and superior shock isolation characteristics. At the instants when energy in the actuator is maximized, we discard this energy as heat in the working fluid by opening a low power solenoid valve for a short time interval. This sets the unstressed length of the actuator, or effective spring, to be zero. The total energy in the vibrating structure is therefore decreased at these instants of unstressed length adjustment. Analytical results and simulations are given that demonstrate the performance of our approach.

Paper Details

Date Published: 6 June 1997
PDF: 8 pages
Proc. SPIE 3041, Smart Structures and Materials 1997: Smart Structures and Integrated Systems, (6 June 1997); doi: 10.1117/12.275701
Show Author Affiliations
James E. Bobrow, Univ. of California/Irvine (United States)
Faryar Jabbari, Univ. of California/Irvine (United States)


Published in SPIE Proceedings Vol. 3041:
Smart Structures and Materials 1997: Smart Structures and Integrated Systems
Mark E. Regelbrugge, Editor(s)

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