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Electro-hydrodynamic Pumped Hydraulic Actuation with Application to Active Vibration Control
Proceedings of SPIE
  • Ahmad Reza Kashani, University of Dayton
  • Sung Kang, University of Dayton
  • Kevin P. Hallinan, University of Dayton
Document Type
Conference Paper
Publication Date
3-1-1999
Abstract

A new type of actuation device has been conceptualized that meets the needs of both large displacement, force and bandwidth within a package more compact than currently available magnetostrictive and stack-type piezoelectric actuators of similar rating. This concept relies on micro-scale electrohydrodynamic (EHD) pumping of a dielectric liquid within small channels. Configured as an actuator, the EHD pump(s) would be used to move fluid between two reservoirs—each having a compliant membrane that interfaces to the world to provide the means to achieve vibration cancellation or micro actuation.

Ordinarily limited to generating flow in macroscale applications, the EHD pump, when operating in a thermal induction mode, is shown to exhibit an exciting scaling law as its size is reduced. As the pump volume to surface area decreases, the energy going toward increasing pressure in the pump has an increasingly larger effect. Since the volume/surface area is proportional to 1/a, where a is the characteristic width or diameter of the channels comprising the pump, the pressure head generated scales similarly. Analytical and numerical studies have shown the EHD-pumped actuator to be capable of delivering equal force and bandwidth to magnetostrictive and stack-type piezo actuators, but with considerably greater displacement and roughly 1/10th of the size. Further, this type of actuator offers the possibility for deployment in active vibration control or micro actuation applications at significantly greater temperatures than for piezoelectric and magnetostrictive devices.

Inclusive pages
180-189
ISBN/ISSN
0277-786X
Document Version
Published Version
Comments

This document is provided for download in compliance with the publisher's policy on self-archiving. Permission documentation is on file.

Citation Information:

Reza Kashani; Sung Kang ; Kevin P. Hallinan; Electro-hydrodynamic pumped hydraulic actuation with application to active vibration control. Proc. SPIE 3675, Smart Structures and Materials 1999: Smart Materials Technologies, 180 (July 12, 1999)

Publisher
SPIE: The International Society for Optics and Photonics
Place of Publication
Newport Beach, CA
Peer Reviewed
Yes
Citation Information
Ahmad Reza Kashani, Sung Kang and Kevin P. Hallinan. "Electro-hydrodynamic Pumped Hydraulic Actuation with Application to Active Vibration Control" Proceedings of SPIE Vol. 3675 (1999)
Available at: http://works.bepress.com/kevin-hallinan/32/