Guo Ying, Hou Yubin, Lu Qingyou
High Magnetic Field Laboratory, Chinese Academy of Sciences and University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China.
Rev Sci Instrum. 2014 May;85(5):056108. doi: 10.1063/1.4879500.
We present a completely practical TunaDrive piezo motor. It consists of a central piezo stack sandwiched by two arm piezo stacks and two leg piezo stacks, respectively, which is then sandwiched and spring-clamped by a pair of parallel polished sapphire rods. It works by alternatively fast expanding and contracting the arm/leg stacks while slowly expanding/contracting the central stack simultaneously. The key point is that sufficiently fast expanding and contracting a limb stack can make its two sliding friction forces well cancel, resulting in the total sliding friction force is <10% of the total static friction force, which can help increase output force greatly. The piezo motor's high compactness, precision, and output force make it perfect in building a high-quality harsh-condition (vibration resistant) atomic resolution scanning probe microscope.
我们展示了一种完全实用的金枪鱼驱动压电马达。它由一个中央压电堆组成，该中央压电堆分别夹在两个臂压电堆和两个腿压电堆之间，然后被一对平行的抛光蓝宝石棒夹在中间并通过弹簧夹紧。它的工作原理是交替快速地使臂/腿压电堆膨胀和收缩，同时缓慢地使中央压电堆膨胀/收缩。关键在于足够快速地使一个肢体压电堆膨胀和收缩能够使其两个滑动摩擦力很好地抵消，从而使总滑动摩擦力小于总静摩擦力的10%，这有助于大幅增加输出力。这种压电马达的高紧凑性、高精度和输出力使其在构建高质量的恶劣条件（抗振动）原子分辨率扫描探针显微镜方面表现出色。
