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Ultrasonic Motor Using First and Second Bending Modes
G. M’Boungui
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DOI:10.17265/1934-7359/2025.02.002
Department of Electrical Engineering, Tshwane University of Technology, Pretoria 0001, South Africa
This paper presents the design of a novel resonator for use in a piezoelectric linear ultrasonic motor. the work is motivated by a motor previously developed by the authors that showed to be capable of achieving a force of 50 mn and a velocity of 14 mm/s, which they found unsatisfactory. to that end, among an existing variety of working principles for piezoelectric ultrasonic motors, the principle of giving the material points of the stator in contact with the rotor a “∞” trajectory and thus propelling the rotor was utilized. our concept is based on Euler-Bernoulli beam theory which shows that the natural frequency ratio of the first and second bending modes for a beam, fixed at both ends, is approximately 3 and we employ a gradient-based optimization algorithm to assist in the design of the structure.
Lissajous pattern, piezoelectric ultrasonic motor.
Journal of Civil Engineering and Architecture 19 (2025) 66-73
doi: 10.17265/1934-7359/2025.02.002
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