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Takeshi Morita

University of Tokyo

SCHOLARLY PAPERS

6

DOWNLOADS

259

TOTAL CITATIONS

0

Scholarly Papers (6)

1.

Rayleigh Wave Excitation with an Elliptical Reflector for High-Power Ultrasound

Number of pages: 25 Posted: 13 Jan 2024
affiliation not provided to SSRN, affiliation not provided to SSRN, affiliation not provided to SSRN, affiliation not provided to SSRN and University of Tokyo
Downloads 82 (803,225)

Abstract:

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SAW device, Mechatronics, Rayleigh wave, Elliptical reflector, Mode conversion, Focusing

2.

Effect of Driving Frequency and Power on Size of Water Droplet Atomized by Multimodal Ultrasonic Transducer

Number of pages: 24 Posted: 01 Oct 2024
University of Tokyo, University of Tokyo, Kaijo Corporation, Kaijo Corporation, University of Tokyo and University of Tokyo
Downloads 70 (883,195)

Abstract:

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Ultrasonic atomization, Acoustic focusing mechanism, Multimodal driving, Droplet diameter distribution.

3.

Rapid speed control of traveling-wave ultrasonic motors using sensorless deep reinforcement learning

Number of pages: 31 Posted: 14 Feb 2026
Tatsuki Sasamura and Takeshi Morita
affiliation not provided to SSRN and University of Tokyo
Downloads 40 (1,263,436)

Abstract:

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Ultrasonic Motors, Deep Reinforcement Learning, Sensorless Control

4.

Vibration shape tuning for selective vibration node shifting in multimodal ultrasonic systems

Number of pages: 19 Posted: 06 Jun 2026
affiliation not provided to SSRN, University of Tokyo, affiliation not provided to SSRN, Laser Zentrum Hannover, affiliation not provided to SSRN, affiliation not provided to SSRN, affiliation not provided to SSRN and affiliation not provided to SSRN
Downloads 27

Abstract:

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laser beam welding, ultrasonic excitation, multimodal excitation, frequency tuning, vibration shape tuning, passive piezo elements

5.

High-Performance Acoustofluidic Blood Plasma Separation Devices Driven by an Algorithm-Optimized ElLIPtical Reflector Focusing Ultrasonic TranSducer (ELIPS)

Number of pages: 25 Posted: 26 Jun 2026
Zhirui Chen, Wei Qiu, Chikahiro Imashiro and Takeshi Morita
University of Tokyo, Lund University, University of Tokyo and University of Tokyo
Downloads 25

Abstract:

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Acoustofluidics, Plasma separation, Bulk acoustic wave (BAW), Algorithm-driven optimization, Ultrasonic transducer

6.

Global Optimization Method for Resonant Shapes in Two-Dimensional Fluid Domains with Plane-Wave Superposition

Number of pages: 18 Posted: 12 Feb 2026
Shoki Ieiri and Takeshi Morita
affiliation not provided to SSRN and University of Tokyo
Downloads 15 (1,509,872)

Abstract:

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acoustic resonance, inverse design, Herglotz wave function, resonator optimization