摘要
研究了冲击产生的高过载对旋转型行波超声电机结构和性能的影响机理和规律。首先,结合旋转型行波超声电机的工作机理和结构形式,建立了该型超声电机在冲击载荷下的有限元模型,利用显式算法模拟其在冲击过载环境中的暂态过程,分析电机的定、转子及压电元件等部件的应力和应变分布规律,研究和评估了目前超声电机结构对瞬时超大过载的耐受情况;其次,设计了特定夹持装置,对旋转型行波超声电机的耐过载特性进行了马歇特锤击实验,实验结果很好地印证了理论分析结果;最后,综合理论和实验结果评定了当前典型的旋转行波超声电机结构在特殊使用环境中的耐过载能力及易损伤部件。实验结果表明,紧凑和简单的结构特点使得超声电机本身具有较好的适应大过载环境的工作能力,在直接承8千个重力加速度冲击过载后仍能维持一定的输出特性。
Dependency of structure and performance of traveling wave type rotary ultrasonic motor on impact high overload is investigated.Firstly based on its special working principle and configuration,the finite element model of traveling wave type rotary ultrasonic motor is presented considering impact load.An explicit finite element method is used to simulate the transient response of the motor with impact load,and stress and strain distribution of the stator,rotor and piezoelectric elements are analyzed.Further,the applicability of traveling wave type rotary ultrasonic motor to impact load system is theoretically evaluated.Then the analyses are verified by the impact experiments of a traveling wave type ultrasonic motor with the special fixed equipment.Finally,shock-proof ability and damageable are studied.Due to its compact and simple structure excellent applicability of the ultrasonic motor to high impact load is experimentally proved,and considerable performance characteristics can be obtained with the directly applied impact load of 8 000acceleration of gravity.
出处
《振动．测试与诊断》
EI
CSCD
北大核心
2014年第1期8-14,185,共7页
Journal of Vibration,Measurement & Diagnosis
基金
国家自然科学基金资助项目(50975135,51175264)
江苏省优势学科建设工程资助项目
机械结构力学与控制国家重点实验室开放基金资助项目(MCMS-0312G02)
关键词
冲击
高过载
旋转行波超声电机
显示算法
impact
high overload
traveling wave type rotary ultrasonic motor
explicit algorithm
