Magnetorheological (MR) fluids can be used in a variety of smart semi-active systems. The MR damper shows an especially great potential to mitigate environmentally induced vibration and shocks. Another aspect of MR fluids is the construction of MR valve network in conjunction with a hydraulic pump resulting in a fully active actuator. These devices are simple, have few moving parts and can be easily miniaturized to provide a compact, high energy density pressure source. The present study describes a prototype MR-piezo hybrid actuator that combines the piezopump and MR valve actuator concepts, resulting in a self-contained hydraulic actuation device without active electromechanical valves. Durability and miniaturization of the hybrid device are major advantages due to its low part count and few moving parts. An additional advantage is the ability to use the MR valve network in the actuator to achieve controllable damping. The design, construction and testing of a prototype MR-piezo hybrid actuator is described. The performance and efficiency of the device is derived using ideal, biviscous and Bingham-plastic representations of MR fluid behavior, and is evaluated with experimental measurements. This will provide a design tool to develop an actuator for a specific application.
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ASME 2003 International Mechanical Engineering Congress and Exposition
November 15–21, 2003
Washington, DC, USA
Conference Sponsors:
- Aerospace Division
ISBN:
0-7918-3707-6
PROCEEDINGS PAPER
Magnetorheological Hydraulic Actuator Driven by a Piezopump
Jin-Hyeong Yoo,
Jin-Hyeong Yoo
University of Maryland, College Park, MD
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Jayant Sirohi,
Jayant Sirohi
University of Maryland, College Park, MD
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Norman M. Wereley,
Norman M. Wereley
University of Maryland, College Park, MD
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Inderjit Chopra
Inderjit Chopra
University of Maryland, College Park, MD
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Jin-Hyeong Yoo
University of Maryland, College Park, MD
Jayant Sirohi
University of Maryland, College Park, MD
Norman M. Wereley
University of Maryland, College Park, MD
Inderjit Chopra
University of Maryland, College Park, MD
Paper No:
IMECE2003-43315, pp. 389-397; 9 pages
Published Online:
May 12, 2008
Citation
Yoo, J, Sirohi, J, Wereley, NM, & Chopra, I. "Magnetorheological Hydraulic Actuator Driven by a Piezopump." Proceedings of the ASME 2003 International Mechanical Engineering Congress and Exposition. Aerospace. Washington, DC, USA. November 15–21, 2003. pp. 389-397. ASME. https://doi.org/10.1115/IMECE2003-43315
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