Nonlinear coupling characteristic analysis of gyrowheel

2016 ◽  
Author(s):  
Hui Zhao ◽  
Xiaokun Liu ◽  
Qing Zhao ◽  
Yu Yao ◽  
Xin Huo
Keyword(s):  
Nonlinear Coupling ◽  
Characteristic Analysis ◽  
Coupling Characteristic

scholarly journals The Coupling Characteristic Investigation of Double-Gimbal Magnetically Suspended Control Moment Gyro Used on Agile Maneuver Spacecraft

2015 ◽  
Vol 2015 ◽  
pp. 1-11 ◽  
Author(s):  
Peiling Cui ◽  
Jian Cui ◽  
Qian Yang ◽  
Shiqiang Zheng
Keyword(s):  
Dynamic Model ◽  
Attitude Control ◽  
Magnetic Bearing ◽  
Nonlinear Coupling ◽  
Spacecraft Motion ◽  
Inertial Coupling ◽  
Control Moment ◽  
Bearing Force ◽  
Coupling Characteristic ◽  
Control Moment Gyro

Double-gimbal magnetically suspended CMG is a novel attitude control actuator for the agile maneuver spacecraft. Taking the double-gimbal magnetically suspended control moment gyro used on agile maneuver spacecraft as the research object, the dynamic model of the magnetically suspended rotor, the inner gimbal, and the outer gimbal of double-gimbal magnetically suspended control moment gyro is built. The nonlinear coupling characteristic between the rotor, the gimbal, and the spacecraft is given. It can be seen that the motion of magnetically suspended rotor does not only rely on magnetic bearing force but also suffer from the influence of gimbal servo system and spacecraft motion. The coupling torque includes the gyro coupling torque and the inertial coupling torque. The work in this paper provides the foundation for further studies.

scholarly journals Air-Structure Coupling Characteristic Analysis of Fan Blade

2007 ◽  
Vol 26 (2) ◽  
pp. 105-114
Author(s):  
Linling Li ◽  
Qibai Huang
Keyword(s):  
Arbitrary Point ◽  
Characteristic Analysis ◽  
Quadrilateral Elements ◽  
Natural Modes ◽  
Blade Shape ◽  
Mode Method ◽  
Coupling Equations ◽  
Coupling Characteristic ◽  
Fan Blade ◽  
The Galerkin Method

For the fan structure, 8-node isoparametric quadrilateral elements are used to discretize the structure based on the fan blade shape while 20-node isoparametric hexahedron elements are used to discretize the surrounding air of the fan blade. The intensity of pressure at an arbitrary point in the surrounding air can be solved by the Galerkin method when the boundary condition is considered. The Wilson-Θ method with good stability is used to solve the air-structure coupling equations. The calculated natural modes and the tested natural modes are compared. The mode method is used to calculate and analyze the fan blade dynamic characteristics in order to study the air-structure coupling.

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