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工程设计学报  2019, Vol. 26 Issue (5): 594-602    DOI: 10.3785/j.issn.1006-754X.2019.05.013
整机和系统设计     
双十字压电振子同型弯振模态驱动的平面超声电机
贺红林, 江涛, 付磊, 刘浩康
南昌航空大学 航空制造工程学院, 江西 南昌 330063
Planar ultrasonic motor driven by same type bending modes of dual-cross piezoelectric vibrator
HE Hong-lin, JIANG Tao, FU Lei, LIU Hao-kang
School of Aeronautical Manufacturing, Nanchang Hangkong University, Nanchang 330063,China
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摘要:

为了丰富平面超声电机的型式,提出一种双十字压电振子同型弯振模态驱动的平面超声电机。利用双十字压电振子的纵杆面内、面外弯振耦合以及横杆面内、面外弯振耦合,分别在两杆的驱动足上合成沿xoz、yoz面行进的两相椭圆轨迹,以交替地推动动子沿x、y向移动。分析了该平面超声电机的驱动机理,并推导出两相椭圆轨迹方程。建立了双十字压电振子机电耦合模型,对其三相工作模态的振型进行仿真分析,并在结构优化的基础上实现了三相工作模态频率一致,使它们分别为43 468,43 552和43 569 Hz。仿真了双十字压电振子的频响特性并实现了干扰模态分离,当驱动电压为250 V时,驱动足x、y、z向振幅分别为1.3,0.8和0.9 μm,满足电机驱动要求。模拟得到定频激励下双十字压电振子驱动足的两相椭圆运动轨迹,验证了所设计平面超声电机驱动机理的有效性。该平面超声电机可输出较大速度与动力,具有广阔的应用前景。

关键词: 双十字压电振子平面超声电机驱动机理动力学特性    
Abstract:

In order to enrich the structure of planar ultrasonic motor, a planar ultrasonic motor driven by same type bending of dual-cross piezoelectric vibrator was proposed. With the in-plane and out-of-plane bending coupling of the longitudinal bars and crossbars of the dual-cross piezoelectric vibrator, two elliptical trajectories along xoz and yoz planes were synthesized on the two-rod driving feet to alternately push the mover along the x, y directions. The driving principle of the planar ultrasonic motor was analyzed, and the elliptial trajectory equation was derived. The electromechanical coupling model of the dual-cross piezoelectric vibrator was established, and the three-phase working modes were simulated. Based on structure optimization, the frequencies of three-phase working modes were consistent, which was 43 468, 43 552 and 43 569 Hz. The frequency nesponse characteristics of the dual-cross piezoelectric vibrator were simulated and the interference mode separation was realized. When the driving voltage was 250 V, the amplitude in x, y and z direction of the driving foot were 1.3, 0.8 and 0.9 μm, respectively, which met the motor drive requirements. The two elliptical trajectories of the dual-cross piezoelectric vibrator driving foot under the constant frequency excitation was simulated,which verified the effectiveness of the driving principle for the designed planar ultrasonic motor. This planar ultrasonic motor is expected to output greater speed and power, which has broad application prospects.

Key words: dual-cross piezoelectric vibrator    planar ultrasonic motor    driving principle    dynamics characteristics
收稿日期: 2018-07-16 出版日期: 2019-10-28
CLC:  TM 359.6  
基金资助:

国家自然科学基金资助项目(51665040);江西省自然科学基金资助项目(20181BAB206024)

作者简介: 贺红林(1967—),男,江西永新人,教授,博士,从事压电驱动技术、结构动力学优化及机电一体化系统设计技术等研究,E-mail:hehonglin1967@nchu.edu.cn,https://orcid.org/0000-0002-4191-5325
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引用本文:

贺红林, 江涛, 付磊, 刘浩康. 双十字压电振子同型弯振模态驱动的平面超声电机[J]. 工程设计学报, 2019, 26(5): 594-602.

HE Hong-lin, JIANG Tao, FU Lei, LIU Hao-kang. Planar ultrasonic motor driven by same type bending modes of dual-cross piezoelectric vibrator. Chinese Journal of Engineering Design, 2019, 26(5): 594-602.

链接本文:

https://www.zjujournals.com/gcsjxb/CN/10.3785/j.issn.1006-754X.2019.05.013        https://www.zjujournals.com/gcsjxb/CN/Y2019/V26/I5/594

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