双作动板驱动的压电宏微直线作动器研究  

Research on a Macro-Micro Linear Actuator Driven by Piezoelectric Double-Acting Plate

作　　者：王哲逸 李冀 龙玉繁[1] 李晨捷 杨亮 贺红林[1] WANG Zheyi;LI Ji;LONG Yufan;LI Chenjie;YANG Liang;HE Honglin(School of Aeronautical Manufacturing,Nanchang Hangkong University,Nanchang 330063,China)

机构地区：[1]南昌航空大学航空制造工程学院,江西南昌330063

出　　处：《压电与声光》2022年第5期752-757,764,共7页Piezoelectrics & Acoustooptics

基　　金：国家自然科学基金资助项目(52165008);江西省自然科学基金重点资助项目(20202ACB202003)。

摘　　要：针对单板式压电作动器动力小、速度低等问题,为丰富宏微直线作动器形式,该文提出基于双作动板式定子的压电直线作动器。选定双作动板的一阶纵振和二阶弯振为作动器工作模态,利用纵振驱使动子滑移,借助弯振实现驱动足与动子的动态接触与分离。阐释了双作动板推动动子前移的过程,推导出驱动足的椭圆轨迹方程及椭圆形成条件。优化出定子结构尺寸为45.3 mm×11.2 mm×6 mm,实现了两工作模态的简并。建立了定子机电耦合分析模型,解算出两相工作模态的振型,求得两相模态频率分别为34994 Hz和34998 Hz,模拟出驱动足的椭圆行进轨迹,求得定子的调压及调频振动特性。测试表明,当驱动电压的幅值和频率为250 V、34938 Hz时,驱动足的x、z向振幅分别达1.34μm和2.73μm,足以推动动子移进。设计了双板式作动器的装配结构,建立了其三维装配模型。该作动器有望输出较大动力与速度,具有广阔的应用前景。A piezoelectric linear actuator based on a double-acting plate stator structure is proposed to address the problem of small output power of existing single-plate piezoelectric actuators and to enrich the form of macro-micro linear actuators.The first-order longitudinal vibration and the second-order bending vibration of the double-acting plate are selected as the operating modes of the actuator,the longitudinal vibration is used to drive the mover to slide and the contact and separation between the driving foot and the mover is realized by the bending vibration.The process of driving the mover forward by the double-acting plate stator is explained and the elliptical trajectory equation of the driving foot and its ellipse forming conditions are derived.The structural dimensions of the stator are optimized to 45.3 mm×11.2 mm×6 mm and the simplification of the two operating modes is realized.An electro-mechanical coupling analysis model of the stator is established,the oscillations of the two-phase operating modes are solved.The frequencies of the two-phase modes are 34994 Hz and 34998 Hz respectively.The elliptical trajectory of the stator driving foot is simulated and the voltage regulating and frequency modulation characteristics of the stator are obtained.When the amplitude and frequency of the drive voltage are 250 V and 34938 Hz,the amplitude of the driving foot along the x and z directions reaches 1.34μm and 2.73μm respectively,which is sufficient to drive the movers.The design of the assembly structure of the double-plate actuator has been completed and a three-dimensional assembly model is presented.The actuator is expected to output large speed and power,and has wide application prospects.

关 键 词：双作动板定子 直线作动器 机电耦合模型 动力学分析 

分 类 号：TM359.6[电气工程—电机]