Development of a Variable Stiffness and Damping Tunable Vibration Isolator
- 1 March 2005
- journal article
- research article
- Published by SAGE Publications in Journal of Vibration and Control
- Vol. 11 (3), 381-396
- https://doi.org/10.1177/1077546305048585
Abstract
In this paper we report on the development of a variable stiffness and damping Liquid Inertia Vibration Eliminator (LIVE) vibration isolator. The result is the ability to shift the isolation frequency of the isolator and also to change the amplification at resonance. A practical variable stiffness spring was developed by using a compound leaf spring with circular spring elements. A wax actuator, controlled by a hot-air gun with a closed-loop displacement and velocity feedback control system, was used to separate the springs at the center. An experimental isolator was constructed and tested. The isolation frequency was shifted from 22.8 to 36.2 Hz by changing the stiffness of the spring by 270%. A transmissibility of less than 10% was achieved over the whole range. The viscous damping ratio was changed from 0.001 to 0.033 by increasing the flow losses in the system.Keywords
This publication has 4 references indexed in Scilit:
- Variable stiffness mechanisms with SMA actuatorsPublished by SPIE-Intl Soc Optical Eng ,1996
- ADAPTIVE PASSIVE VIBRATION CONTROLJournal of Sound and Vibration, 1996
- A variable stiffness vibration absorber for minimization of transient vibrationsJournal of Sound and Vibration, 1992
- Antiresonant Rotor Isolation for Vibration ReductionJournal of the American Helicopter Society, 1980