An I-shape linear piezoelectric actuator using resonant type longitudinal vibration transducers. (December 2016)

• Record Type: Journal Article
• Authors: Liu, Yingxiang; Yan, Jipeng; Xu, Dongmei; Chen, Weishan; Yang, Xiaohui; Tian, Xinqi
• Is Part Of: Mechatronics. Volume 40(2016)
• Page Start: 87
• Page End: 95
• Publication Date: 2016-12
• Subjects: Piezoelectric actuator -- Longitudinal transducer -- Frequency tuning -- Elliptical motion -- Vibration coupling; Computer integrated manufacturing systems -- Periodicals; Flexible manufacturing systems -- Periodicals; Mechatronics -- Periodicals; Productique -- Périodiques; Fabrication, Systèmes flexibles de -- Périodiques; Mécatronique -- Périodiques; Computer integrated manufacturing systems; Flexible manufacturing systems; Mechatronics; Periodicals; 629.89
• DOI: 10.1016/j.mechatronics.2016.09.002
• Languages: English
• ISSNs: 0957-4158

Abstract

Highlights: Three longitudinal transducers are used to construct a linear piezoelectric actuator. The maximum speed and thrust force of the prototype are 1563 mm/s and 158.2 N. Coupling bending vibrations are generated in the horizontal transducers. The vibration coupling problem is solved under a suitable temporal shift. This piezoelectric actuator can be used in linear motion platform for direct driving. Abstract: Resonant type longitudinal vibration transducers are used in this work to construct a linear piezoelectric actuator with four driving feet. Totally three longitudinal transducers are integrated in I-shape to form the proposed actuator, which contains one vertical transducer and two horizontal transducers. These three transducers vibrate under longitudinal modes with certain temporal sequence, whose vibrations are superimposed in the actuator to generate elliptical motions on the four driving feet. The three transducers are tuned to be suitable dimensions, under which they have very close 1st longitudinal resonance frequencies; the working frequency of the piezoelectric actuator is designed to be about 31.3 kHz. The vibration coupling problem between the longitudinal transducers are studied by calculating the motion trajectories of the four feet. It is found that the temporal shift of the longitudinal vibrations can be used to tune the movement trajectories; the four feet can get nearly the same vertical displacements under a phase shift of 105°. At last, the vibration characteristics and mechanical output performances of a prototype are measured. The working frequency of the prototype, the maximum speed, and the maximum thrust force are measured to be 33.15 kHz, 1563 mm/s, and 158.2 N, respectively.