31 March 2009 Design and modeling of a hydraulically amplified magnetostrictive actuator for automotive engine mounts
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Abstract
A bidirectional magnetostrictive actuator with millimeter stroke and a blocked force of few tens of Newtons has been developed based on a Terfenol-D driver and a simple hydraulic magnification stage. The actuator is compared with an electrodynamic actuator used in active powertrain mounts in terms of electrical power consumption, frequency bandwidth, and spectral content of the response. The measurements show that the actuator has a flat free-displacement and blocked-force response up to 200 Hz, suggesting a significantly broader frequency bandwidth than commercial electromagnetic actuators while drawing comparable amounts of power.
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Suryarghya Chakrabarti, Marcelo J. Dapino, "Design and modeling of a hydraulically amplified magnetostrictive actuator for automotive engine mounts", Proc. SPIE 7290, Industrial and Commercial Applications of Smart Structures Technologies 2009, 72900D (31 March 2009); doi: 10.1117/12.817019; https://doi.org/10.1117/12.817019
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