Chen Haipeng, Chen Chao, Wang Junshan, Shi Mingyou
State Key Laboratory of Mechanics and Control of Mechanical Structures, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, People's Republic of China.
Rev Sci Instrum. 2018 Nov;89(11):115004. doi: 10.1063/1.5055579.
In this work, the performance evolution of a traveling wave type rotary ultrasonic motor (TRUM) in a high-rotating environment is studied. The dynamic model of the stator of the TRUM in the centrifugal field is established, and the centrifugal stiffening effect on the stator caused by the centrifugal force is described. Furthermore, the warping deflection of the stator caused by the centrifugal force is analyzed. It is found to change the original contact state and decrease the performance of the TRUM. The contact model between the stator and rotor in the centrifugal field is established. Moreover, the performance model of the TRUM in the centrifugal field is established, and the mechanism and varying trend of the mechanical performance of the TRUM in this condition are analyzed. Finally, the performance test system of the TRUM is set, and the mechanical performance of the TRUM at high angular velocities environment is measured. And the methods to improve the tolerance of the TRUM in the centrifugal field are put forward.
在这项工作中，研究了行波型旋转超声电机（TRUM）在高转速环境下的性能演变。建立了TRUM定子在离心场中的动力学模型，描述了离心力对定子产生的离心强化效应。此外，分析了离心力引起的定子翘曲变形。发现其改变了原来的接触状态并降低了TRUM的性能。建立了离心场中定子与转子之间的接触模型。此外，建立了TRUM在离心场中的性能模型，并分析了在此条件下TRUM机械性能的机理和变化趋势。最后，搭建了TRUM性能测试系统，测量了TRUM在高角速度环境下的机械性能。并提出了提高TRUM在离心场中耐受性的方法。
