Bidirectional control of a magnetorheological piezohydraulic actuator

Jin-Hyeong Yoo; Jayant Sirohi; Shaju John; Anirban Chaudhuri; Christopher Cadou; Norman M. Wereley

doi:10.1117/12.547577

26 July 2004 Bidirectional control of a magnetorheological piezohydraulic actuator

Jin-Hyeong Yoo, Jayant Sirohi, Shaju John, Anirban Chaudhuri, Christopher Cadou, Norman M. Wereley

Proceedings Volume 5390, Smart Structures and Materials 2004: Smart Structures and Integrated Systems; (2004) https://doi.org/10.1117/12.547577
Event: Smart Structures and Materials, 2004, San Diego, CA, United States

Abstract

Magnetorheological (MR) fluids can be used in a variety of smart semi-active systems. MR dampers have especially great potential to mitigate environmentally induced vibration and shocks. MR fluid can be used effectively in valve networks to control the flow from a hydraulic source to enable 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 piezo-pump and MR valve actuator concepts, resulting in a self-contained hydraulic actuation device without active electro-mechanical 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. Unidirectional performance, or constant velocity actuator shaft motion, is assessed analytically and compared to experimental data. A experimental assessment of the magnetorheological birectional flow control capability is also provided.

Citation Download Citation

Jin-Hyeong Yoo, Jayant Sirohi, Shaju John, Anirban Chaudhuri, Christopher Cadou, and Norman M. Wereley "Bidirectional control of a magnetorheological piezohydraulic actuator", Proc. SPIE 5390, Smart Structures and Materials 2004: Smart Structures and Integrated Systems, (26 July 2004); https://doi.org/10.1117/12.547577

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