Results 251 to 260 of about 125,093 (294)
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Spherical ultrasonic motor for pipe inspection robot
IEEE ISR 2013, 2012We present a pipe inspection robot using a newly developed spherical ultrasonic motor (SUSM) as a camera actuator. The novel SUSM has improved the range of movement compared to previous SUSMs, and the robot can point a camera in any direction. In this study, we determined a method for controlling the rotational direction and strategic control from the ...
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Spherical Ultrasonic Motor for Space
2016In resent years, space satellites have been widely used in the world. They cause the space debris, which has become a problem because they may collide each other in space. In our study, we have developed a Spherical UltraSonic Motor (SUSM) with 3 DOF in space use to drive the satellite thruster and resolve the space debris problem.
U. Nishizawa, S. Toyama, T. Oohashi
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Control method of a spherical ultrasonic motor
Proceedings 2003 IEEE/ASME International Conference on Advanced Intelligent Mechatronics (AIM 2003), 2004In this paper, we propose a control method for controlling an arbitrary orientation of a rotor of a spherical ultrasonic motor (SUSM) by using a magnetized rotor and Hall devices. The arbitrary orientation of the magnetized rotor is determined by detecting the output voltage of the magnetic pole axis measured by Hall devices embedded in the center of ...
E. Purwanto, S. Toyama
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Design of a novel ultrasonic spherical motor
2000 IEEE Ultrasonics Symposium. Proceedings. An International Symposium (Cat. No.00CH37121), 2002This paper presents a novel ultrasonic spherical motor. With only a single moving part, this spherical motor is capable of providing 2-DOF motions required for micro satellite and space robot actuation. The operating principle of the motor is explicated and an initial prototype was fabricated and tested.
null Min Hu +3 more
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A two-degree of freedom spherical motor
2016 International Symposium on Electrical Engineering (ISEE), 2016In this paper, a direct-drive spherical motor to produce two-degree of freedom rotations has been proposed. The structure and prototype of the motor are given and the basic principles are described, including the operation principle and mathematic theories, etc.
Y. Zou, K.W. E. Cheng
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Development of Spherical Ultrasonic Motor for Space
Applied Mechanics and Materials, 2014In resent years, due to advances in science technology, space satellites have made progress. So, the presence of space debris has become problem in the world because they may collide each other. In our study, we have developed Spherical Ultrasonic Motor (SUSM) for space use with 3 DOF to drive the satellite thruster and resolve it.
Taro Oohashi, Shigeki Toyama
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Development and design of spherical induction motors
Proceedings of the IEE Part A: Power Engineering, 1959The first major development described is concerned with the arrangement of stator blocks. A previous paper described a system in which four stator blocks were arranged around the rotor. The new layout involves the use of only two blocks containing pre-skewed slots.
F.C. Williams +2 more
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Design Considerations of a Permanent Magnetic Spherical Motor Using Spherical Harmonics
IEEE Transactions on Magnetics, 2014A design consideration of a permanent magnet spherical motor (PMSM) is presented based on spherical harmonic (SH) analysis. By analogy with fractional-slot rotary machines, the PMSM with eight electromagnets/six permanent magnets (PMs) (per layer) dual-winding structure is chosen to improve control flexibility and fault tolerance ability that has ...
Bin Li, Rujian Yu, Hua Li, Guidan Li
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Development and control of a three DOF spherical induction motor
2013 IEEE International Conference on Robotics and Automation, 2013This paper reports, to our knowledge, the first spherical induction motor (SIM) operating with closed loop control. The motor can produce up to 4 Nm of torque along arbitrary axes with continuous speeds up to 300 rpm. The motor's rotor is a two-layer copper-over-iron spherical shell. The stator has four independent inductors that generate thrust forces
Masaaki Kumagai, Ralph L. Hollis
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Stator design of a new type of spherical piezoelectric motor
IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 2010The stator design of a new type of spherical motor driven by piezoelectric actuators is developed. A curved piezoelectric actuator is designed to attach to the spherical surface. A series of the curved piezoelectric actuators is laid in a line around a spherical surface.
Yung, Ting +4 more
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