Li Honglong, Wang Jiru, Xu Zhi, Qin Feng, Wang Zhaoxin, Zhao Hongwei
School of Mechanical and Aerospace Engineering, Jilin University (Nanling Campus), 5988 Renmin Street, Changchun 130025, People's Republic of China.
Rev Sci Instrum. 2021 Dec 1;92(12):125001. doi: 10.1063/5.0070960.
With the development of the precision manufacturing industry, actuators' performance requirements are increasingly demanding. However, stick-slip actuators still have the problems of backward motion and low motion speed at low frequencies. In this paper, to decrease the backward motion and achieve high speed at low frequencies, a linear piezoelectric stick-slip actuator is designed based on the two-stage lever principle. Theoretical and numerical investigations are used to optimize the flexible hinge of the stick-slip actuator. Experimental results indicate that the motion slider can achieve a smooth motion. The backward rate can even drop to 0. The maximum motion speed was 124.83 mm/s at 1600 Hz. The motion speed of the designed actuator was higher than that of previous stick-slip actuators at the same frequency. In addition, the load capacity of the prototype is tested. Based on different loads, the load matching is achieved by an auxiliary piezoelectric-stack, where the maximum horizontal load was 2.3 N. According to the comparison with previous actuators, the designed prototype can achieve high speed at low frequencies. Furthermore, the displacement curves show good smoothness. These characteristics will be helpful for the practical application of stick-slip piezoelectric actuators.
随着精密制造业的发展，对执行器的性能要求越来越高。然而，粘滑执行器在低频时仍存在反向运动和运动速度低的问题。本文基于两级杠杆原理设计了一种线性压电粘滑执行器，以减少反向运动并在低频时实现高速运动。采用理论和数值研究方法对粘滑执行器的柔性铰链进行优化。实验结果表明，运动滑块能够实现平稳运动。反向率甚至可降至0。在1600Hz时最大运动速度为124.83mm/s。所设计执行器在相同频率下的运动速度高于以往的粘滑执行器。此外，对该样机的负载能力进行了测试。基于不同负载，通过辅助压电叠堆实现负载匹配，其中最大水平负载为2.3N。通过与以往执行器的比较可知，所设计的样机能够在低频时实现高速运动。此外，位移曲线显示出良好的平滑性。这些特性将有助于粘滑压电执行器的实际应用。
