工程科技文献索引服务平台 | abstract.cmanuf.com

Analysis, measurement and control of a new disc-type ultrasonic motor system

刊名：	Mechatronics
作者：	Puu-An Juang Da-Wei Gu
刊号：	736C0117
ISSN：	0957-4158
出版年：	2006
年卷期：	2006, vol.16, no.1
页码：	1-12
总页数：	12
分类号：	TN0
关键词：	Equivalent circuit；Speed control scheme；Current modulation；Piezoelectro-mechanic；Discretized equation of motion
参考中译：
语种：	eng
文摘：	This paper first presents an equivalent circuit model of a new disc-type ultrasonic motor and discusses its applications in evaluation of the stator's frequency characteristics. The equivalent circuit analysis is based on the principle of ultrasonic motor operations and is conducted from the viewpoint of the mechanic vibration of the piezoelectric ceramic disk. Furthermore, because drift of the piezostator characteristics will cause variation of the motor speed, a controller is thus necessary in order to produce a constant output speed. In this research, the speed control scheme is implemented by using current modulation, so the revolutional speed will be kept constant. Meanwhile, the frequency behaviour of the proposed motor and its consequences on speed control scheme are discussed. Finally, a 3-D mechanical element with an extra electrical degree of freedom is employed to simulate the dynamic vibration modes of the linear piezoelectric, mechanical and piezoelectro-mechanic behaviours of a metal disc structure embedded with a piezoelectric actuator. In piezoelectric finite element formulation, a discretized equation of motion is developed and solved by using the integration scheme to explain why an adaptive boundary condition, a simple support condition with three non-equal-triangular (120°-90°-150°) fixed points near the edge for the mechanical design of a new disc-type piezoelectric ultrasonic stator, is defined so that a lateral elliptical motion of the contact point between stator and rotor can be realized for driving the rotor.