摘要
基于分析动力学的哈密顿原理,采用模态假定将超声电机压电振子复合结构的复杂振动在模态域内等效成单自由度系统的简单振动;考虑压电陶瓷的压电效应,将压电陶瓷诱发应变的激振力的大小用参数力系数描述,建立了超声电机压电振子的机电耦合动力学模型,通过实例计算与实验结果对比,验证该模型是较准确的,可以在超声电机的初步设计阶段替代有限元分析来确定电机的结构及材质参数,并选定合适的工作频率,从而为超声电机进一步的参数化分析和仿真模型的建立,及结构动力特性优化打下理论基础.
Based on Hamilton principle and modal assumption, the complicated vibration of the piezoelectric resonator is simplified as a simple vibration of a single degree of freedom system, and its electro-mechanical dynamic model is establation force described by a force factor. The model is proved to be accurate by calculation and experiment analysis through an example, and can be used to the earlier design, the proper working frequency＇s choice, and parametric analysis for ultrasonic motor as well as the simulation model＇s establishment and the optimization of dynamic characteristic further more.
出处
《动力学与控制学报》
2006年第2期145-150,共6页
Journal of Dynamics and Control
关键词
压电振子
动力学模型
振动模态
piezoelectric resonator, dynamic model, vibrating modality
