Lv Qibao, Yao Zhiyuan, Li Xiang
State Key Laboratory of Mechanics and Control of Mechanical Structures, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China.
State Key Laboratory of Mechanics and Control of Mechanical Structures, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China.
Ultrasonics. 2017 Nov;81:32-38. doi: 10.1016/j.ultras.2017.05.017. Epub 2017 May 25.
The effects of surface roughness are not considered in the traditional motor model which fails to reflect the actual contact mechanism between the stator and slider. An analytical model for calculating the tangential force of linear ultrasonic motor is proposed in this article. The presented model differs from the previous spring contact model, the asperities in contact between stator and slider are considered. The influences of preload and exciting voltage on tangential force in moving direction are analyzed. An experiment is performed to verify the feasibility of this proposed model by comparing the simulation results with the measured data. Moreover, the proposed model and spring model are compared. The results reveal that the proposed model is more accurate than spring model. The discussion is helpful for designing and modeling of linear ultrasonic motors.
传统电机模型未考虑表面粗糙度，无法反映定子与滑块之间的实际接触机制。本文提出了一种计算直线超声电机切向力的解析模型。该模型与先前的弹簧接触模型不同，考虑了定子与滑块接触时的微凸体。分析了预载和激励电压对运动方向切向力的影响。通过将仿真结果与实测数据进行比较，进行了实验以验证该模型的可行性。此外，还对所提出的模型与弹簧模型进行了比较。结果表明，所提出的模型比弹簧模型更准确。该讨论有助于直线超声电机的设计和建模。
