Results 271 to 280 of about 844,475 (305)

Study on the dynamic performance of tilt rotor supported by spherical roller bearings

Proceedings of the Institution of Mechanical Engineers, Part K: Journal of Multi-body Dynamics, 2017
Jiapeng Yang, H. Zeng, Tongqing Zhu, Q. An   +3 more
exaly   +2 more sources

Torque Compensation System Design for a Spherical Superconducting Rotor

IEEE Transactions on Instrumentation and Measurement, 2014
The aim of this paper is to design a torque compensation system with guaranteed performance that allows attitude control of the superconducting rotor, which is spinning at 4.2 K. The torque compensation system includes four pairs of torque-producing superconducting coils.
Xinning Hu, Qiuliang Wang, Chunyan Cui, Fei Gao, Hui Wang, Yi Li, Housheng Wang, Junsheng Cheng, Yinming Dai, Luguang Yan   +9 more
openaire   +1 more source

Volvot : A spherical mobile robot with eccentric twin rotors

2011 IEEE International Conference on Robotics and Biomimetics, 2011
In this paper, we propose a spherical mobile robot equipped with eccentric twin rotors and 2-d.o.f. actuators, which we call Volvot. The first actuator, called rotor actuator, drives a pair of off-centered metal disks fixed to both ends of the drive shaft.
Masato Ishikawa, Ryouhei Kitayoshi, Toshiharu Sugie   +2 more
openaire   +1 more source

High precision measurement of gyro rotor sphericity

Precision Engineering, 1980
Abstract Quartz gyro rotors with a sphericity of better than one part per million are needed for the Relativity Gyroscope Experiment. This paper describes the measurement techniques that are employed to ensure that this requirement is met. The basic measurement is a surface irregularity map, generated with the help of a computer-aided roundness ...
J.A. Lipa, G.J. Siddall
openaire   +1 more source

Magnetic Field Analysis of Rotor Eccentricity of Spherical Permanent Magnet Motor

IEEE International Conference on Applied Superconductivity and Electromagnetic Devices, 2020
Rotor eccentricity, as a common motor fault, is one of the causes of motor noise and torque ripple. It is mainly caused by the misalignment of the axis of the stator and rotor of the motor due to the improper installation of the inner diameter of the ...
Zheng Li, Xuze Yu, Xueting Wang, Xuanxuan Xing   +3 more
semanticscholar   +1 more source

Analysis of the Driving Force of a Levitated Spherical Superconducting Rotor

IEEE Transactions on Applied Superconductivity, 2012
A spin drive device of superconducting rotor was designed based on the Meissner effect. The electromagnetic field generated by the stator coils engenders the rotating torque on the superconducting rotor through the windows on its inner wall. The driving force was calculated using finite-element analysis, and the results show that the driving torque is ...
null Xinning Hu, null Qiuliang Wang, null Housheng Wang, null Chunyan Cui, null Hui Wang, null Jianhua Liu   +5 more
openaire   +1 more source

Investigation on Theoretic Profile Curve of the Spherical Cam Transmission Mechanism in a Twin-rotor Piston Engine

2019 IEEE/ASME International Conference on Advanced Intelligent Mechatronics (AIM), 2019
Energy and environmental issues are the driving force for researches on engine worldwide, to pursue new developments on improving engine performances. Many advanced themodynamic cycle theories and working models were born in the fields.
Haijun Xu, Faliang Zhou, Hu Chen, Lei Zhang, Tengan Zou   +4 more
semanticscholar   +1 more source

Numerical Simulations of Spherical Vertical-Axis Wind Rotor

Applied Mechanics and Materials, 2013
In this paper, the effects of the shape of three types of the blade on power coefficient of Savonius rotors are studied by simulating the model using numerical simulation under the same conditions. For this purpose, three spherical rotors with different configurations but identical number of stages and blades, aspect ratio and overlap keeping the ...
Yong Yu Huang, Qiu Yun Mo, Xu Zhang, Zu Peng Zhou   +3 more
openaire   +1 more source

The Response of a Spherical Journal Bearing to Rotor Unbalance

1992
A spherical hydrodynamic journal bearing proposed by Leung et al (1) has two main advantages over traditional journal bearings: 1. It can accommodate large angular misalignment of the journal with little degradation of performance. 2. It has the capacity to resist axial forces as well as supporting a transverse load.
I. A. Craighead, P. S. Leung
openaire   +1 more source

Single and double rotor spiral waves on spherical surfaces

Reaction Kinetics and Catalysis Letters, 1990
The beautiful target and spiral patterns exhibited by the Belousov-Zhabotinsky (BZ) reaction in thin films of solution are representative of spatiotemporal behavior in a two-dimensional, planar excitable medium. 14 We report here BZ chemical waves propagating on the two-dimensional surface of a sphere.
Jerzy Maselko, Kenneth Showalter
openaire   +1 more source