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Development of Torsional and Linear Piezoelectrically Driven MotorsThe development of rotary and linear inchworm-motors using piezoelectric actuators is presented. The motors' design has the advantage of a macro and micro stepper motor with high load and speed. The torsional design is capable of fast angular positioning with micro level accuracy. Additionally, the rotary motor, as designed, can be used as a clutch/brake mechanism. Constructed prototype motors of both types along with their characteristics are presented. The torsional motor consists of a torsional section that provides angular displacement and torque, and two alternating clamping sections which provide the holding force. The motor relies on the principal piezoelectric coupling coefficient (d33) with no torsional elements, increasing its torque capability. The linear motor consists of a longitudinal vibrator that provides displacement and load, and two alternating clamping sections which provide the holding force. This design eliminates bending moment, tension and shear applied to the actuator elements, increase its load capability and life. Innovative flexure designs have been introduced for both motor types. Critical issues that affect the design and performance of the motors are explored and discussed. Experiments are performed demonstrating the motor prototypes based on the aforementioned design considerations.
Document ID
19960047696
Acquisition Source
Langley Research Center
Document Type
Abstract
Authors
Duong, Khanh
(Vanderbilt Univ. Nashville, TN United States)
Newton, David
(Vanderbilt Univ. Nashville, TN United States)
Garcia, Ephrahim
(Vanderbilt Univ. Nashville, TN United States)
Date Acquired
August 17, 2013
Publication Date
March 1, 1996
Publication Information
Publication: Proceedings of the 4th Annual Workshop: Advances in Smart Materials for Aerospace Applications
Subject Category
Electronics And Electrical Engineering
Accession Number
96N33306
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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