双足驱动双压电晶片直线超声波电机运行机理研究  

Operation mechanism of linear ultrasonic motor installed with bimorphs and double-driving feet

作　　者：陈强[1] 徐志科[2] 蒋春容[1] 陆旦宏[1] 

机构地区：[1]南京工程学院电力工程学院,南京211167 [2]东南大学电气工程学院,南京210096

出　　处：《振动与冲击》2014年第22期21-25,共5页Journal of Vibration and Shock

基　　金：国家自然科学基金资助项目(51207021);江苏省自然科学基金项目(BK20140766);南京工程学院校级科研基金资助项目(YKJ201315;YKJ201317)

摘　　要：研究新型直线超声波电机运行机理,采用双压电晶片及双足驱动结构,具有结构简单、无需频率简并、易于小型化等优点。详述其结构、振形特点及工作机理。建立电机定子振动响应有限元模型,给出输入阻抗计算方法。用已建模型计算获得定子驱动足接触点在谐振频率点附近振幅,推导驱动足接触点运动轨迹。通过实测定子阻抗特性将所得结果与理论分析进行比较。The operation mechanism of a new type linear ultrasonic motor was analyzed.The motor,installed with bimorphs and double-driving feet,has the attribute of simple structure,no frequency degeneration and easiness to be miniaturized.The construction,vibration mode and operation principle were described.A finite element model of the stator was established to investigate its vibration responses.The computation method of input impedance of the stator together with the computation results was presented.The vibration amplitudes at the driving-feet＆#39;s contact points close to the harmonic frequency were computed.The movement loci of the driving-feet＆#39;s contact points were derived.The impedance characteristic of stator was surveyed by using impedance characteristic analysis instrument, and the experimental results were compared with the theoretical ones.

关 键 词：直线超声波电机 双压电晶片 双足驱动 有限元模型 运动轨迹 阻抗特性 

分 类 号：TM383[电气工程—电机]