摘要
提出一种新的磁致伸缩薄膜动态驱动特性的研究方法,其原理是以磁致伸缩薄膜复合梁的等效形变为基础,将磁致伸缩驱动应力转换为等效驱动力矩,建立磁致伸缩薄膜的强迫振动动态模型,通过受迫振动理论来研究磁致伸缩薄膜的动态特性。对该模型进行了仿真计算和试验验证,表明该模型可以描述磁致伸缩薄膜的动态行为。该方法对薄膜驱动器的运动分析与结构优化。最终实现基于磁场自感知的超磁致伸缩薄膜驱动器的闭环控制具有参考意义。
Research on dynamic characteristics of giant mag-netostrictive thin films is crucial important for further description of its kinemics behavior of micro mobile mechanism, therefore a new method about its dynamic characteristics analysis on giant magnetostrictive thin films is proposed , whose principle is to analyze its dynamic behavior of giant magnetostrictive thin films based on force oscillation theory, by establishing its force oscillation model on which equivalent drive torque, converted from magnetostrictive drive stress, is exerted based on equivalent deformation of compound magnetostrictive thin films beam. Simulations and experiments on the model show its effectiveness to describe the dynamic behavior of giant magnetostrictive thin films. This method has significance for reference to its dynamics analysis, as well as structural design and optimization as finally to realize its close-up control on giant magnetostrictive thin films actuator by magnetic field sensor.
出处
《机械工程学报》
EI
CAS
CSCD
北大核心
2005年第6期168-173,共6页
Journal of Mechanical Engineering
基金
国家自然科学基金(60275034
50275021)辽宁省自然科学基金(20021061.20032119)资助项目。
关键词
超磁致伸缩薄膜
等效力矩
动态模型
动态特性
Giant magnetostriction thin films Equivalent torque Dynamic model Dynamic characteristics
