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Record Details

Record 1 of 43949
Miniaturization of Planar Horn Motors
External Online Source: hdl:2014/42425
Author and Affiliation:
Sherrit, Stewart(Jet Propulsion Lab., California Inst. of Tech., Pasadena, CA, United States)
Ostlund, Patrick N.(Jet Propulsion Lab., California Inst. of Tech., Pasadena, CA, United States)
Chang, Zensheu(Jet Propulsion Lab., California Inst. of Tech., Pasadena, CA, United States)
Bao, Xiaoqi(Jet Propulsion Lab., California Inst. of Tech., Pasadena, CA, United States)
Bar-Cohen, Yoseph(Jet Propulsion Lab., California Inst. of Tech., Pasadena, CA, United States)
Widholm, Scott E.(Jet Propulsion Lab., California Inst. of Tech., Pasadena, CA, United States)
Badescu, Mircea(Jet Propulsion Lab., California Inst. of Tech., Pasadena, CA, United States)
Abstract: There is a great need for compact, efficient motors for driving various mechanisms including robots or mobility platforms. A study is currently underway to develop a new type of piezoelectric actuators with significantly more strength, low mass, small footprint, and efficiency. The actuators/motors utilize piezoelectric actuated horns which have a very high power density and high electromechanical conversion efficiency. The horns are fabricated using our recently developed novel pre-stress flexures that make them thermally stable and increases their coupling efficiency. The monolithic design and integrated flexures that pre-stresses the piezoelectric stack eliminates the use of stress bolt. This design allows embedding solid-state motors and actuators in any structure so that the only macroscopically moving parts are the rotor or the linear translator. The developed actuator uses a stack/horn actuation and has a Barth motor configuration, which potentially generates very large torque and speeds that do not require gearing. Finite element modeling and design tools were investigated to determine the requirements and operation parameters and the results were used to design and fabricate a motor. This new design offers a highly promising actuation mechanism that can potentially be miniaturized and integrated into systems and structures. It can be configured in many shapes to operate as multi-degrees of freedom and multi-dimensional motors/actuators including unidirectional, bidirectional, 2D and 3D. In this manuscript, we are reporting the experimental measurements from a bench top design and the results from the efforts to miniaturize the design using 2x2x2 mm piezoelectric stacks integrated into thin plates that are of the order of3 x 3x 0.2 cm.
Publication Date: Mar 12, 2012
Document ID:
20130000420
(Acquired Jan 07, 2013)
Subject Category: MECHANICAL ENGINEERING
Document Type: Conference Paper
Meeting Information: SPIE Smart Structures/NDE Conference; 3 Mar. 2012; San Diego, CA; United States
Financial Sponsor: Jet Propulsion Lab., California Inst. of Tech.; Pasadena, CA, United States
Department of the Army; United States
Organization Source: Jet Propulsion Lab., California Inst. of Tech.; Pasadena, CA, United States
Description: 9p; In English; Original contains color illustrations
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: FINITE ELEMENT METHOD; MATHEMATICAL MODELS; MINIATURIZATION; PIEZOELECTRIC ACTUATORS; PIEZOELECTRICITY; PIEZOELECTRIC MOTORS; POWER EFFICIENCY; ROTATION; ELECTROMECHANICAL DEVICES; PLANAR STRUCTURES; TORQUE; COMPUTER AIDED DESIGN
Other Descriptors: ACTUATORS; PIEZOELECTRIC MOTORS; ROTARY DEVICES; HORN ACTUATION; BARTH MOTOR
Miscellaneous Notes: sponsored in part by the Army's RCTA2011 program
Availability Source: Other Sources
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Last Modified: January 07, 2013
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