Working principle and design of a double cylinders type traveling wave ultrasonic motor using composite transducer  

作　　者：陈维山 刘英想 刘军考 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28-32,共5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：A double cylinders type traveling wave ultrasonic motor using composite transducer was proposed.The proposed stator contained two cylinders and one composite transducer,and the transducer located on the outer surfaces of cylinders.The composite transducer included two exponential horns located on leading ends,and the horns insected with the cylinders at tip ends.Two degenerated flexural vibration modes spatially and temporally orthogonal to each other were excited in each cylinder by the composite transducer.In this new design,a single transducer could excite two flexural traveling waves in the cylinders.Thus,elliptical motions were achieved at the particles on the teeth.The working principle of the proposed motor was analyzed.The cylinder and transducer were designed with FEM.The resonant frequencies of two vibration modals of the stator were tuned to be the same,and the motion trajectories of nodes on the teeth were analyzed.Transient analysis results show that the motion trajectories of teeth are ellipses.The results of this paper can guide the development of this new type of ultrasonic motor.A double cylinders type traveling wave ultrasonic motor using composite transducer was proposed. The proposed stator contained two cylinders and one composite transducer, and the transducer located on the outer surfaces of cylinders. The composite transducer included two exponential horns located on leading ends, and the horns insected with the cylinders at tip ends. Two degenerated flexural vibration modes spatially and temporally orthogonal to each other were excited in each cylinder by the composite transducer. In this new de- sign, a single transducer could excite two flexural traveling waves in the cylinders. Thus, elliptical motions were achieved at the particles on the teeth. The working principle of the proposed motor was analyzed. The cyl- inder and transducer were designed with FEM. The resonant frequencies of two vibration modals of the stator were tuned to be the same, and the motion trajectories of nodes on the teeth were analyzed. Transient analysis results show that the motion trajectories of teeth are ellipses. The results of this paper can guide the development of this new type of ultrasonic motor.

关 键 词：ultrasonic motor traveling wave double cylinders composite 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]