Results 231 to 240 of about 16,970 (268)
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A standing wave-type noncontact linear ultrasonic motor
IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 2001In this study, a novel standing wave-type noncontact linear ultrasonic motor is proposed and analyzed. This linear ultrasonic motor uses a properly controlled ultrasonic standing wave to levitate and drive a slider. A prototype of the motor was constructed by using a wedge-shaped aluminum stator, which was placed horizontally and driven by a multilayer
Hu, J, Li, G, Chan, HLW, Choy, CL
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Design and optimization of a modal- independent linear ultrasonic motor
IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, 2014To simplify the design of the linear ultrasonic motor (LUSM) and improve its output performance, a method of modal decoupling for LUSMs is proposed in this paper. The specific embodiment of this method is decoupling of the traditional LUSM stator's complex vibration into two simple vibrations, with each vibration implemented by one vibrator.
Shengli, Zhou, Zhiyuan, Yao
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Contact analysis and experimental investigation of a linear ultrasonic motor
Ultrasonics, 2017The effects of surface roughness are not considered in the traditional motor model which fails to reflect the actual contact mechanism between the stator and slider. An analytical model for calculating the tangential force of linear ultrasonic motor is proposed in this article.
Qibao, Lv, Zhiyuan, Yao, Xiang, Li
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Analysis of Tiny Piezoelectric Ultrasonic Linear Motor
Japanese Journal of Applied Physics, 2006A modified structure for tiny ultrasonic linear motors has been developed, and various shaft materials have been tested in order to improve dynamic properties. The shaft material has a direct influence on efficiency, reliability, and quality of the motors and their dynamic properties. The shaft material is crucial to achieve high performance. Shafts of
Hyun-Phill Ko +5 more
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Linear ultrasonic motor with wheel-shaped stator
Sensors and Actuators A: Physical, 2010A novel linear ultrasonic motor with a wheel-shaped stator using two orthogonal fourth bending modes has been developed. The stator of the motor is a notched piezoelectric composite beam. Eight piezoelectric ceramic rings are clamped orthogonally to excite two orthogonal fourth bending modes of the beam.
Yunlai Shi +2 more
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VHDL control system for linear ultrasonic motors
SPIE Proceedings, 2006Ultrasonic Motors are devices with micro or even nano-positioning capabilities. This feature derives from voltage-strain characteristic of piezoelectric ceramics. Furthermore, to accomplish fine positioning, a high resolution control system is required.
Cesar R. Rodrigues +3 more
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2011
As a type of ultrasonic motors, a linear ultrasonic motor (LUSM) also utilizes the converse piezoelectric effect of piezoelectric ceramics and the ultrasonic vibration of an elastic body [1]. It transfers the micro amplitude motion of a stator into the macro linear motion of a slider by the friction force between the stator and slider.
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As a type of ultrasonic motors, a linear ultrasonic motor (LUSM) also utilizes the converse piezoelectric effect of piezoelectric ceramics and the ultrasonic vibration of an elastic body [1]. It transfers the micro amplitude motion of a stator into the macro linear motion of a slider by the friction force between the stator and slider.
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An ultrasonic linear motor using ridge-mode traveling waves
IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 2005A new type of ultrasonic linear motor is presented using traveling waves excited along a ridge atop a substrate. The ridge cross section was designed to permit only the fundamental mode to be excited during operation of the motor, with a Langevin transducer used as the source of vibration in this study. The ridge waveguide was first made of lossy media
Masahiko, Tominaga +4 more
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A Small-Size Ultrasonic Linear Motor
Japanese Journal of Applied Physics, 1991A new structure for an ultrasonic linear motor using piezoelectric actuators has been developed. The ultrasonic vibrator consists of a metal bar with two legs. The direction of the slider's movement is controlled by changing the polarity of the drive voltage of the multilayered piezoelectric actuator.
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Hybrid Transducer Type Ultrasonic Linear Motor
Japanese Journal of Applied Physics, 1989Hybrid transducer type ultrasonic motors have the advantage of freedom of design. A linear motor of this type consists of a longitudinal vibrator and multilayered piezoelectric actuators. The transducer is operated at the resonance frequency of the vibrator. In this paper, the characteristics are measured in a study of the basic operating conditions,
M. Kurosawa, H. Yamada, S.Ueha
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