Čeponis Andrius, Mažeika Dalius, Jūrėnas Vytautas
Department of Engineering Graphics, Faculty of Fundamental Sciences, Vilnius Gediminas Technical University, LT-10223 Vilnius, Lithuania.
Department of Information Systems, Faculty of Fundamental Sciences, Vilnius Gediminas Technical University, LT-10223 Vilnius, Lithuania.
Micromachines (Basel). 2021 Nov 13;12(11):1396. doi: 10.3390/mi12111396.
This paper presents numerical and experimental investigations of a small size piezoelectric locomotion platform that provides unlimited planar motion. The platform consists of three piezoelectric bimorph plates attached to the equilateral triangle-shaped structure by an angle of 60 degrees. Alumina spheres are glued at the bottom of each plate and are used as a contacting element. The planar motion of the platform is generated via excitation of the first bending mode of the corresponding plate using a single harmonic signal while the remaining plates operate as passive supports. The direction of the platform motion controlled by switching electric signal between piezoelectric plates. A numerical investigation of the 2-DOF platform was performed, and it was found out that the operation frequency of the bimorph plates is 23.67 kHz, while harmonic response analysis showed that the maximum displacement amplitude of the contact point reached 563.6 µm in the vertical direction while an excitation signal of 210 V is applied. Prototype of the 2-DOF piezoelectric platform was made, and an experimental study was performed. The maximum linear velocity of 44.45 mm/s was obtained when preload force and voltage of 0.546 N and 210 V were applied, respectively.
本文介绍了一种能提供无限平面运动的小型压电运动平台的数值和实验研究。该平台由三个压电双晶片板组成，它们以60度角连接到等边三角形结构上。氧化铝球粘贴在每个板的底部，并用作接触元件。通过使用单个谐波信号激励相应板的第一弯曲模式来产生平台的平面运动，而其余板用作被动支撑。通过在压电板之间切换电信号来控制平台的运动方向。对二维自由度平台进行了数值研究，发现双晶片板的工作频率为23.67kHz，而谐波响应分析表明，在施加210V激励信号时，接触点在垂直方向上的最大位移幅值达到563.6μm。制作了二维自由度压电平台的原型，并进行了实验研究。当分别施加0.546N的预载力和210V的电压时，获得了44.45mm/s的最大线速度。
