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Study of a Spherical Ultrasonic Motor for Haptic Display System
Ryota Ishibashi,Tomohiro Ohara,Naoyuki Takesue,Jumpei Arata,Shigeki Toyama,Masahiko Hoshina,Yoshiyuki Hirai,Naoki Fukaya,Hideo Fujimoto 제어로봇시스템학회 2010 제어로봇시스템학회 국제학술대회 논문집 Vol.2010 No.10
In this paper, we examine a Spherical Ultrasonic Motor(SUSM) for the haptic display system. Experimental system consists of a force sensor and a SUSM comprising one spherical rotor and three ring-shaped stators. The stator is made from an elastic body and piezoelectric elements for vibration. The stators and the rotor are in pressure contact with each other. The frequency and the phase difference the stators" vibration can be controlled and we can generate torque of the rotor. Some experiments were briefly investigated to examine the performances of the proposed haptic display method.
( Goki Kamei ),( Shigeki Ishibashi ),( Koki Yoshioka ),( Satoru Sakurai ),( Hiroyuki Inoue ),( Yu Mochizuki ),( Masakazu Ishikawa ),( Nobuo Adachi ) 대한슬관절학회 2022 대한슬관절학회지 Vol.34 No.-
Purpose: A distal femoral trial component was manufactured, and flexion gap size and inclination were evaluated with or without the distal femoral trial component in total knee arthroplasty (TKA). This study aimed to evaluate the effect of the distal femoral trial component on flexion gap size and joint inclination in posterior-stabilized (PS)-TKA. Materials and methods: A total of 84 patients with medial osteoarthritis who underwent mobile-bearing PSTKA using modified gap techniques were included in this retrospective study. The flexion gap size and inclination before and after setting the distal femoral trial component were evaluated and compared with the final gap size and inclination. Results: The joint gap size and inclination were significantly lower in those with than in those without the distal femoral trial component (P = 0.005, P < 0.001). The final gap size and inclination were similar to the gap size and inclination with the distal trial component (P = 0.468, P = 0.158). Conclusions: The joint gap size and medial tension in PS-TKA were significantly reduced after setting the distal femoral trial component. The flexion gap measured using the distal femoral trial component was similar to that when the final trial component was set. To more accurately perform the gap technique TKA, the flexion gap should be measured using the distal femoral trial component.
Unsteady Wet Steam Flow Measurements in a Low-Pressure Test Steam Turbine
Duan, Chongfei,Ishibashi, Koji,Senoo, Shigeki,Bosdas, Ilias,Mansour, Michel,Kalfas, Anestis I.,Abhari, Reza S. Korean Society for Fluid machinery 2016 International journal of fluid machinery and syste Vol.9 No.1
An experimental study is conducted for unsteady wet steam flow in a four-stage low-pressure test steam turbine. The measurements are carried out at outlets of the last two stages by using a newly developed fast response aerodynamic probe. This FRAP-HTH probe (Fast Response Aerodynamic Probe - High Temperature Heated) has a miniature high-power cartridge heater with an active control system to heat the probe tip, allowing it to be applied to wet steam measurements. The phase-locked average results obtained with a sampling frequency of 200 kHz clarify the flow characteristics, such as the blade wakes and secondary vortexes, downstream from the individual rotational blades in the wet steam environment.
Unsteady Wet Steam Flow Measurements in a Low-Pressure Test Steam Turbine
Chongfei Duan,Koji Ishibashi,Shigeki Senoo,Ilias Bosdas,Michel Mansour,Anestis I. Kalfas,Reza S. Abhari 한국유체기계학회 2016 International journal of fluid machinery and syste Vol.9 No.1
An experimental study is conducted for unsteady wet steam flow in a four-stage low-pressure test steam turbine. The measurements are carried out at outlets of the last two stages by using a newly developed fast response aerodynamic probe. This FRAP-HTH probe (Fast Response Aerodynamic Probe - High Temperature Heated) has a miniature high-power cartridge heater with an active control system to heat the probe tip, allowing it to be applied to wet steam measurements. The phase-locked average results obtained with a sampling frequency of 200 kHz clarify the flow characteristics, such as the blade wakes and secondary vortexes, downstream from the individual rotational blades in the wet steam environment.