Actuating mechanism and design of a T-type linear ultrasonic motor  

作　　者：刘英想 刘军考 陈维山 石胜君 

机构地区：[1]State Key Laboratory of Robotics and System,Harbin Institute of Technology

出　　处：《Journal of Harbin Institute of Technology(New Series)》2011年第2期43-46,共4页哈尔滨工业大学学报（英文版）

基　　金：Sponsored by the National Natural Science Foundation of China(Grant No. 50875057 and 51075082);the State Key Laboratory of Robotics and Systems(HIT No. SKLRS200901A04)

摘　　要：To take advantage of merits of higher output-power and efficiency of bolt-clamped transducer,a T-type linear ultrasonic motor was proposed in this paper.The proposed motor contained a horizontal transducer and a vertical transducer.The horizontal transducer included two exponential shape horns,and the vertical transducer contained one exponential shape horn.And the horns intersected at tip ends where a driving foot was located.The longitudinal vibrations of transducers were excited by the stretching vibration of PZT ceramics.Longitudinal vibrations were superimposed in the motor and generated elliptical trajectory at the driving foot.The actuating mechanism of the proposed motor was analyzed.The two working modals of the motor were gained with FEM.The resonant frequencies of two working modals were degenerated by adjusting the structural parameters.The motion trajectory of nodes on the driving foot was gained by transient analysis.The vibration amplitude of node on the driving foot indicates that the proposed motor has potential good output characteristics.The results verify the feasibility of the proposed design and provide instructions for the development of the new ultrasonic motor.To take advantage of merits of higher output-power and efficiency of bolt-clamped transducer, a T-type linear ultrasonic motor was proposed in this paper. The proposed motor contained a horizontal transducer and a vertical transducer. The horizontal transducer included two exponential shape horns, and the vertical transducer contained one exponential shape horn. And the horns intersected at tip ends where a driving foot was located. The longitudinal vibrations of transducers were excited by the stretching vibration of PZT ceramics. Longitudinal vibrations were superimposed in the motor and generated elliptical trajectory at the driving foot. The actuating mechanism of the proposed motor was analyzed. The two working modals of the motor were gained with FEM. The resonant frequencies of two working modals were degenerated by adjusting the structural parameters. The motion trajectory of nodes on the driving foot was gained by transient analysis. The vibration amplitude of node on the driving foot indicates that the proposed motor has potential good output characteristics. The results verify the feasibility of the proposed design and provide instructions for the development of the new ultrasonic motor.

关 键 词：ultrasonic motor LINEAR T-TYPE longitudinal transducer FEM 

分 类 号：TP211[自动化与计算机技术—检测技术与自动化装置]