School of Mechanical Engineering, Northeast Electric Power University, Jilin 132012, China.
School of Mechatronic Engineering, Changchun University of Technology, Changchun 130012, China.
Rev Sci Instrum. 2023 Feb 1;94(2):025003. doi: 10.1063/5.0134324.
A new piezoelectric actuator based on the stick-slip working principle inspired by the predation of the snake is proposed and developed in this work. A lead zirconate titanate (PZT) stack is used and inserted into the stator with an asymmetric configuration. Then, the elongation of the PZT stack can be transmitted into the vertical and horizontal displacements on the driving foot. They are used to press and drive the slider, respectively. In this design, the motion of the actuator imitates the predation process of the snake. The principle of the proposed actuator is clarified in detail. The statics characteristics are conducted by using the FEM method. The dynamics model of the actuator was established to show the motion behavior of the slider in theory. Finally, the output characteristics of the developed piezoelectric actuator are tested. The results stated that this actuator obtained the maximum output speed of 11.44 mm/s under a voltage of 100 V and a frequency of 600 Hz. The output force of the developed actuator was 2.8N under the preload force of 3N. In conclusion, the feasibility of the proposed piezoelectric stick-slip type actuator inspired by the predation of the snake is verified.
受蛇类捕食启发，提出并研制了一种基于滑移工作原理的新型压电致动器。采用了锆钛酸铅（PZT）堆叠，并以不对称的方式插入定子中。然后，PZT 堆叠的伸长可以转化为驱动脚上的垂直和水平位移。它们分别用于按压和驱动滑块。在这个设计中，致动器的运动模仿了蛇类捕食的过程。详细阐明了所提出的致动器的原理。利用有限元法进行了静态特性分析。建立了致动器的动力学模型，从理论上展示了滑块的运动行为。最后，测试了所开发的压电致动器的输出特性。结果表明，该致动器在 100V 电压和 600Hz 频率下获得了 11.44mm/s 的最大输出速度。在 3N 的预加载力下，开发的致动器的输出力为 2.8N。总之，验证了受蛇类捕食启发的提出的压电式滑移致动器的可行性。
