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The electromechanical coupled dynamic model of the stator of the bar-type ultrasonic motor is derived based on the finite element method. The dynamical behavior of the stator is analyzed via this model and the theoretical result agrees with the experimental result of the stator of the prototype motor very well. Both the structural design principles and the approaches to meet the requirements for the...
A novel annular sector curvilinear ultrasonic motor with composite in-plane bi-mode is presented and optimally designed by combining genetic algorithm and finite element method together in this paper. The optimization structure of the vibrator is determined. According to the optimization results, the sample motor is fabricated and tested. The results show that the consistency of the resonance frequencies...
The goal of this study is to optimize a cylindrical needle with a grooved surface for maximum backscattering to the transceiver during medical ultrasound procedures. Evaluation of backscattering performance of multiple prototype geometries with 2D time-harmonic acoustic finite element analysis was performed. Groove patterns with repeat periods determined with the guidance of the grating equation to...
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