A bidirectional magnetostrictive actuator with millimeter stroke and a blocked force of ± 22 N has been developed based on a simple hydraulic magnification mechanism. The purpose of the actuator is to replace the electromagnetic actuator in active engine mounts. The Terfenol-D actuator has a flat free displacement response up to 200 Hz and a flat blocked force response over a frequency range of at least 10 to 500 Hz. The actuator promises to deliver a much broader frequency bandwidth than commercial electromagnetic actuators.
Volume Subject Area:
Enabling Technologies and Integrated System Design
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