HYDRAULICALLY AMPLIFIED MAGNETOSTRICTIVE ACTUATOR FOR ACTIVE ENGINE MOUNTS

摘要

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 fiat 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.