旋转行波超声电机性能提升技术进展

为推动旋转行波超声电机的发展及其在精密驱动领域的应用,综述了其性能提升技术研究进展并分析了现阶段尚且存在的技术问题。首先,从定子行波的合成、质点椭圆运动轨迹、接触界面的摩擦驱动等方面论述了传统旋转行波超声电机的运行机理。然后,从结构优化和新材料应用角度综述了旋转行波超声电机的发展及其局限性;从温升控制角度阐释了温度变化对超声电机性能的影响并介绍了现有解决方案;论述了变预压力对谐振频率漂移的耦合影响,并指出了目前研究存在的不足;从双行波驱动角度分析了超声电机发展过程中的重大突破,概况了其研究历程及可行的发展方向。最后,归纳了旋转行波超声电机亟待解决的技术难题,并建议了解决方案。

Progress on performance promotion technologies of rotary traveling wave ultrasonic motors

To spur the development and application of rotary traveling wave ultrasonic motors for precision driving,the progress regarding the performance promotion technologies and remaining unsolved technical problems were summarized.First,the operation mechanism was introduced to discuss the synthesis of traveling waves,the trajectory of particle elliptical motion,and friction drive at the contact interface.Then,structural improvements and the application of new materials were reviewed.The influence of increasing temperature was analyzed and the solution was discussed.By investigating the coupling relationship between the preload and the resonant frequency,the shortcomings of present studies were indicated.With the proposed driving mechanism of a dual traveling wave,rotary traveling wave ultrasonic motors could seize the opportunity to enhance the output performance,and the study progress and future directions were discussed.Finally,the challenges and feasible alternatives for rotary traveling wave ultrasonic motors were discussed.