Affiliation:
1. State Key Laboratory of Mechanics and Control of Mechanical Structure, Nanjing University of Aeronautics and Astronautics, No. 29 Yudao Street, Nanjing 210016, China
2. School of Electrical and Mechanical Engineering, Pingdingshan University, Southern Section of Weilai Road, Pingdingshan 467000, China
Abstract
The requirements of large thrust in bidirectional motion, high specific power (power/weight ratio), reliable self-locking at power off state, and compact size envelope for various applications of existing piezoelectric actuators are still urgent. To address these challenges, this study makes full use of the piezoelectric material’s excellent dynamic performance, robust force output, and high energy density to propose a novel inchworm piezoelectric actuator, which relies on the alternate clamping of two nuts independently rotated by two ultrasonic motors on a feed-screw in accordance with a piezoelectric stack (piezo-stack) excitation to accumulate the piezo-stack’s electric field-induced strain periodically and realize power output. The operation principle and design process of the presented actuator were elaborated, and a prototype was fabricated and experimented. Results indicate that the actuator has achieved an expected bidirectional motion for powering the tensile load and compressive load, attained a micrometer-sized step resolution, produced a 3.08 mm/s free speed, a 700 N stall load, and a 1.34 W/kg specific power, and shown a favorable prospect for further development.
Funder
National Natural Science Foundation of China
Reference34 articles.
1. A survey of piezoelectric actuators with long working stroke in recent years: Classifications, principles, connections and distinctions
2. S. K. Shome, U. Datta, A. Mukherjee, and P. Bhattacharjee, 3rd International Innovative Applications of Computational Intelligence on Power, Energy and Controls with Their Impact on Humanity (CIPECH) (IEEE, Ghaziabad, 2018), pp. 160–164.
3. C. Zhao, Ultrasonic Motors: Technologies and Applications (Science Press, Beijing, 2011), Chap. 15, pp. 448–466.
4. Development and experiment evaluation of an H-shape linear piezoelectric actuator operated in stepping mode
5. A review of recent studies on non-resonant piezoelectric actuators
Cited by
1 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献