面内纵振复合模态直线超声电机模态识别方法  

Modal Recognition Method for Linear Ultrasonic Motor Using In-Plane Coupling Longitudinal Modes

作　　者：陈紫嫣 王寅[1] 曹俊 时运来[2] 黄卫清 CHEN Ziyan;WANG Yin;CAO Jun;SHI Yunlai;HUANG Weiqing(College of Mechanical Engineering and Automation,Huaqiao University Xiamen,361021,China;College of Aerospace Engineering,Nanjing University of Aeronautics and Astronautics Nanjing,210016,China;College of Mechanical and Electrical Engineering,Guangzhou University Guangzhou,510006,China)

机构地区：[1]华侨大学机电及自动化学院,厦门361021 [2]南京航空航天大学航空学院,南京210016 [3]广州大学机械及电气工程学院,广州510006

出　　处：《振动．测试与诊断》2021年第2期399-405,418,共8页Journal of Vibration,Measurement & Diagnosis

基　　金：国家自然科学基金青年科学基金资助项目(51505161);超声电机国家地方联合工程实验室开放课题资助项目(NJ20160001);华侨大学中青年教师科研提升计划资助项目(ZQN-PY604)。

摘　　要：为识别一类纵振复合振动模式超声电机定子的工作模态,为优化定子动力学设计提供依据,提出通过局部振型相关分析识别电机定子的模态识别方法。首先,分析了纵振复合模态超声电机定子的工作模态,结合激光多普勒测振系统原理分析了面内振动模态识别的难点;其次,在电机定子动力学分析的基础上,提出了通过振子底端局部振型识别工作模态的方法;最后,通过定子样机的激光多普勒测振仪扫频测试,验证了通过定子底部端面局部振型来识别工作模态这一方法的可行性。结果表明:该方法可推广应用于由一对纵振模态复合的超声振子的工作模态识别,还可更高效地从有限元分析得到多个模态分析结果中识别工作模态,为结构的动力学优化奠定基础。In order to identify the working modes of the stator of ultrasonic motor using in-plane coupling longitudinal modes,and to provide a basis for their stator dynamic optimization,a modal recognition method for stator is proposed by means of local mode correlation analysis. Firstly,the working modes of stator are analyzed,and the difficulties of in-plane vibration mode identification are analyzed based on the principle of laser Doppler vibration measurement system. On the basis of the dynamic analysis of the stator,the method to identify the working mode by the local mode shape at the bottom of the vibrator is proposed;Finally,the feasibility of the method is verified by the frequency response results obtained by the laser Doppler vibrometer. This method can be extended to identify the working modes of similar ultrasonic oscillators composed by a pair of longitudinal mode vibrator,and also can be applied to extract the working modes more efficiently from multi-modal analysis results obtained from the finite element analysis,which lays a foundation for the dynamic optimization of the structure.

关 键 词：直线超声电机 模态试验 激光多普勒测振 复合振动模式 

分 类 号：TM35[电气工程—电机] TM359.4