Yang Xiaohui, Liu Yingxiang, Chen Weishan, Liu Junkao
State Key Laboratory of Robotics and System, Harbin Institute of Technology, Harbin 150001, Heilongjiang Province, China.
Ultrasonics. 2016 Feb;65:277-81. doi: 10.1016/j.ultras.2015.09.014. Epub 2015 Sep 28.
A cylindrical traveling wave ultrasonic motor using bonded-type composite beam is proposed in this work. In this new design, a new exciting mode for L-B (longitudinal-bending) hybrid vibrations using bonded-type is adopted, which requires only two pieces of PZT ceramic plates and a single metal beam. In the new motor, the traveling wave of a cylinder can be excited by the L-B vibrations of a bonded-type beam. When two alternating voltages with phase difference are applied, the longitudinal and bending vibrations of the beam can be generated synchronously based on the new exciting mode for L-B hybrid vibrations, and the temporal phase difference of the two vibrations is always 90°. Finite element method is adopted to realize the modal degeneration in order to confirm the final structural parameters of the motor, and analyze the motion trajectory of the driving tip. After the fabrication of a prototype, the vibration characteristics and mechanical output ability are measured. The maximum no-load speed and maximum output torque of the prototype are 342 rpm and 6.26 mN m at a voltage of 100 Vrms.
本文提出了一种采用粘结型复合梁的圆柱形行波超声电机。在这种新设计中，采用了一种新的粘结型L-B（纵向-弯曲）混合振动激励模式，该模式仅需两片PZT陶瓷片和一根金属梁。在新型电机中，粘结型梁的L-B振动可激发圆柱行波。当施加两个具有相位差的交变电压时，基于L-B混合振动的新激励模式，梁的纵向和弯曲振动可同步产生，且两种振动的时间相位差始终为90°。采用有限元方法实现模态退化，以确定电机的最终结构参数，并分析驱动尖端的运动轨迹。制作样机后，测量其振动特性和机械输出能力。在100Vrms电压下，样机的最大空载转速和最大输出转矩分别为342rpm和6.26mN·m。
