A bidirectional linear microactuator with a stator less than 400 μm~3, fulfilling Feynman's original criteria for a motor less than l/64th of an inch on a side [R. Feynman, Engineering and Science Magazine (Caltech) 4, 23 (1960)], is shown to generate forces over 30 mN in either direction at speeds of up to 40 mm/s using a large 28 g polished alumina slider. Using the thickness mode of a stepped piezoelectric block in conjunction with a pair of fundamental flexural modes of a pair of slanted beams—each slightly differs in configuration—gives the ability to generate silent bidirectional motion at an excitation frequency of about 1.7 MHz. In addition to offering forces at least one order of magnitude larger than those of the other methods, the system also serves as a platform for studying nonlinear frictional phenomena on the nanoscale and its manipulation through acoustic irradiation of the contact interface for propulsion.
展开▼
机译:定子小于400μm〜3的双向线性微执行器,满足Feynman最初对于侧面小于1/64英寸的电机的标准[R. Feynman,《工程与科学杂志》(Caltech)4,23(1960)]显示,使用大型28 g抛光氧化铝滑块可在任一方向以高达40 mm / s的速度产生超过30 mN的力。将阶梯式压电块的厚度模式与一对倾斜梁的一对基本挠曲模式结合使用(每个结构在结构上稍有不同),可以在大约1.7 MHz的激发频率下产生无声的双向运动。除了提供比其他方法大至少一个数量级的力外,该系统还可以用作研究纳米级非线性摩擦现象及其对推进接触面的声辐射操纵的平台。
展开▼