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Please use this identifier to cite or link to this item: http://hdl.handle.net/10204/793

Title: Development of a variable stiffness and damping tunable vibration isolator
Authors: Cronje, JM
Heyns, PS
Theron, NJ
Loveday, PW
Keywords: Tunable vibration isolator
Liquid inertia vibration eliminator
Variable stiffness spring
Wax actuator
Issue Date: Mar-2005
Publisher: Sage Publications Ltd
Citation: Cronje, JM et al. 2005. Development of a variable stiffness and damping tunable vibration isolator. Journal of Vibration and Control, Vol. 11(3), pp 381-396
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.
Description: Copyright: 2005 Sage Publications Ltd
URI: http://hdl.handle.net/10204/793
ISSN: 1077-5463
Appears in Collections:Manufacturing science and technology
General science, engineering & technology

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