The Experts below are selected from a list of 219 Experts worldwide ranked by ideXlab platform
Chunsheng Zhao - One of the best experts on this subject based on the ideXlab platform.
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Note: A Disk-shaft shaped high-speed rotary ultrasonic motor.
The Review of scientific instruments, 2018Co-Authors: Le Wang, Wang Yongjie, Chunsheng ZhaoAbstract:We report a novel high-speed rotary ultrasonic motor, which works at the out-of-plane vibration mode (B11 mode). This motor contains one tapered rotor and one Metal Disk-shaft shaped stator. The stator’s vibration mode B11 is excited by two pairs of piezoelectric ceramics attached to the bottom face of the Disk. Through the traveling wave propagation at the contact faces, the shaft located at the center of the Metal Disk can effectively drive the rotor pressed onto it to rapidly rotate. One prototype motor with the appearance size of Φ 29 mm × 8 mm and a mass of 13 g is fabricated, and the experimental results show that it can rotate at a relatively high speed of up to 7000 rpm at the driving voltage of 350 Vp-p. The steady speed of the motor is 5000 rpm, and the maximum output torque is about 0.5 mN m. With merits of high speed revolution, a simple structure and a compact size, this motor is highly promising for many applications, such as precise instruments and miniaturized industrial robots.We report a novel high-speed rotary ultrasonic motor, which works at the out-of-plane vibration mode (B11 mode). This motor contains one tapered rotor and one Metal Disk-shaft shaped stator. The stator’s vibration mode B11 is excited by two pairs of piezoelectric ceramics attached to the bottom face of the Disk. Through the traveling wave propagation at the contact faces, the shaft located at the center of the Metal Disk can effectively drive the rotor pressed onto it to rapidly rotate. One prototype motor with the appearance size of Φ 29 mm × 8 mm and a mass of 13 g is fabricated, and the experimental results show that it can rotate at a relatively high speed of up to 7000 rpm at the driving voltage of 350 Vp-p. The steady speed of the motor is 5000 rpm, and the maximum output torque is about 0.5 mN m. With merits of high speed revolution, a simple structure and a compact size, this motor is highly promising for many applications, such as precise instruments and miniaturized industrial robots.
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A novel high-speed rotary ultrasonic motor applied to micro air vehicles
2016 Symposium on Piezoelectricity Acoustic Waves and Device Applications (SPAWDA), 2016Co-Authors: Le Wang, Chunsheng Zhao, Xue ChengAbstract:In this paper, a novel ultrasonic motor based on the out-of plane flexural vibration mode is designed. The motor consists of a hollow carbon cylinder and a disc-type coplanar piezoelectric trimorph actuator. The cylinder is glued in the center of the Metal disc. The electrodes of the piezoelectric layers of the actuator are divided into the four equal sections. There are four piezoelectric plates bonded to the bottom face of the Metal Disk for exciting the stator's out-of-plane flexural vibration mode. The shaft is used to amplify the vibration amplitude of the Metal Disk. The rotor pressed on the conical surface of the shaft can be driven to rotate by the traveling wave induced friction force. The preload between the stator and rotor is applied by one nut screwed to the solid shaft. A prototype of the proposed motor is fabricated and characterized. The vibration amplitude of the stator's Metal Disk is measured by the PSV laser Doppler vibrometer. The prototype's rotational speed can reach 5000 r/min and the amplitude of the Disk can reach 0.3μm when the driven frequency is 33.186 kHz and the driven voltage is 350 Vp-p.
Le Wang - One of the best experts on this subject based on the ideXlab platform.
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Note: A Disk-shaft shaped high-speed rotary ultrasonic motor.
The Review of scientific instruments, 2018Co-Authors: Le Wang, Wang Yongjie, Chunsheng ZhaoAbstract:We report a novel high-speed rotary ultrasonic motor, which works at the out-of-plane vibration mode (B11 mode). This motor contains one tapered rotor and one Metal Disk-shaft shaped stator. The stator’s vibration mode B11 is excited by two pairs of piezoelectric ceramics attached to the bottom face of the Disk. Through the traveling wave propagation at the contact faces, the shaft located at the center of the Metal Disk can effectively drive the rotor pressed onto it to rapidly rotate. One prototype motor with the appearance size of Φ 29 mm × 8 mm and a mass of 13 g is fabricated, and the experimental results show that it can rotate at a relatively high speed of up to 7000 rpm at the driving voltage of 350 Vp-p. The steady speed of the motor is 5000 rpm, and the maximum output torque is about 0.5 mN m. With merits of high speed revolution, a simple structure and a compact size, this motor is highly promising for many applications, such as precise instruments and miniaturized industrial robots.We report a novel high-speed rotary ultrasonic motor, which works at the out-of-plane vibration mode (B11 mode). This motor contains one tapered rotor and one Metal Disk-shaft shaped stator. The stator’s vibration mode B11 is excited by two pairs of piezoelectric ceramics attached to the bottom face of the Disk. Through the traveling wave propagation at the contact faces, the shaft located at the center of the Metal Disk can effectively drive the rotor pressed onto it to rapidly rotate. One prototype motor with the appearance size of Φ 29 mm × 8 mm and a mass of 13 g is fabricated, and the experimental results show that it can rotate at a relatively high speed of up to 7000 rpm at the driving voltage of 350 Vp-p. The steady speed of the motor is 5000 rpm, and the maximum output torque is about 0.5 mN m. With merits of high speed revolution, a simple structure and a compact size, this motor is highly promising for many applications, such as precise instruments and miniaturized industrial robots.
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A novel high-speed rotary ultrasonic motor applied to micro air vehicles
2016 Symposium on Piezoelectricity Acoustic Waves and Device Applications (SPAWDA), 2016Co-Authors: Le Wang, Chunsheng Zhao, Xue ChengAbstract:In this paper, a novel ultrasonic motor based on the out-of plane flexural vibration mode is designed. The motor consists of a hollow carbon cylinder and a disc-type coplanar piezoelectric trimorph actuator. The cylinder is glued in the center of the Metal disc. The electrodes of the piezoelectric layers of the actuator are divided into the four equal sections. There are four piezoelectric plates bonded to the bottom face of the Metal Disk for exciting the stator's out-of-plane flexural vibration mode. The shaft is used to amplify the vibration amplitude of the Metal Disk. The rotor pressed on the conical surface of the shaft can be driven to rotate by the traveling wave induced friction force. The preload between the stator and rotor is applied by one nut screwed to the solid shaft. A prototype of the proposed motor is fabricated and characterized. The vibration amplitude of the stator's Metal Disk is measured by the PSV laser Doppler vibrometer. The prototype's rotational speed can reach 5000 r/min and the amplitude of the Disk can reach 0.3μm when the driven frequency is 33.186 kHz and the driven voltage is 350 Vp-p.
P V Prosuntsov - One of the best experts on this subject based on the ideXlab platform.
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Complex Design Method of Ceramic Blades and Metal Disk Connection
Volume 6: Ceramics; Controls Diagnostics and Instrumentation; Education; Manufacturing Materials and Metallurgy, 2019Co-Authors: D. V. Sapronov, S V Reznik, Michael Mezencev, Telman Karimbaev, P V ProsuntsovAbstract:Abstract This paper presents a complex approach to designing ceramic blades dovetail joints. Two ceramic materials were considered: diamond reinforced silicon carbide and hot pressed silicon nitride (only in contact testing). The model blades were made from diamond reinforced silicon carbide due to its availability and mature technology. Part 1 describes the models of mechanical and thermal contact and contains experimental data on contact strength and thermal contact conductance. Part 2 investigates the effect of stress concentration and scale factor on the fracture of ceramic test pieces. Part 3 proposes a theoretical-experimental method to estimate friction coefficient in a dovetail joint. We also investigated the character of the ceramic blades fracture during the rotor spin-up. Part 4 deals with automating the design process of the ceramic blades dovetail joints using experimental data.
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Computational and Experimental Investigation of Mechanical and Thermal Contacts of Ceramic Blades with the Metal Disk in Gas Turbine Engines
Journal of Engineering Physics and Thermophysics, 2018Co-Authors: S V Reznik, D. V. Sapronov, P V ProsuntsovAbstract:Models of thermal and mechanical contacts of ceramic and Metal parts in lock joints of turbines of aircraft gas turbine engines have been developed which take account of the character of operating loads in them. Experimental data on the strength and thermal conductance of a ceramics–Metal contact joint have been presented. The investigations were carried out with ceramic specimens based on hot-pressed silicon nitride and silicon carbide reinforced with diamond particles.
Stephen Y Chou - One of the best experts on this subject based on the ideXlab platform.
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extraordinary light transmission through opaque thin Metal film with subwavelength holes blocked by Metal Disks
Optics Express, 2011Co-Authors: Stephen Y ChouAbstract:We observed that when subwavelength-sized holes in an optically opaque Metal film are completely covered by opaque Metal Disks larger than the holes, the light transmission through the holes is not reduced, but rather enhanced. Particularly we report (i) the observation of light transmission through the holes blocked by the Metal Disks up to 70% larger than the unblocked holes; (ii) the observation of tuning the light transmission by varying the coupling strength between the blocking Disks and the hole array, or by changing the size of the Disks and holes; (iii) the observation and simulation that the Metal Disk blocker can improve light coupling from free space to a subwavelength hole; and (iv) the simulation that shows the light transmission through subwavelength holes can be enhanced, even though the gap between the Disk and the Metal film is partially connected with a Metal. We believe these finding should have broad and significant impacts and applications to optical systems in many fields.
Xue Cheng - One of the best experts on this subject based on the ideXlab platform.
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A novel high-speed rotary ultrasonic motor applied to micro air vehicles
2016 Symposium on Piezoelectricity Acoustic Waves and Device Applications (SPAWDA), 2016Co-Authors: Le Wang, Chunsheng Zhao, Xue ChengAbstract:In this paper, a novel ultrasonic motor based on the out-of plane flexural vibration mode is designed. The motor consists of a hollow carbon cylinder and a disc-type coplanar piezoelectric trimorph actuator. The cylinder is glued in the center of the Metal disc. The electrodes of the piezoelectric layers of the actuator are divided into the four equal sections. There are four piezoelectric plates bonded to the bottom face of the Metal Disk for exciting the stator's out-of-plane flexural vibration mode. The shaft is used to amplify the vibration amplitude of the Metal Disk. The rotor pressed on the conical surface of the shaft can be driven to rotate by the traveling wave induced friction force. The preload between the stator and rotor is applied by one nut screwed to the solid shaft. A prototype of the proposed motor is fabricated and characterized. The vibration amplitude of the stator's Metal Disk is measured by the PSV laser Doppler vibrometer. The prototype's rotational speed can reach 5000 r/min and the amplitude of the Disk can reach 0.3μm when the driven frequency is 33.186 kHz and the driven voltage is 350 Vp-p.