scholarly journals Attitude Dynamics/Control of a Dual-Body Spacecraft with Variable-Speed Control Moment Gyros

2004 ◽  
Vol 27 (4) ◽  
pp. 513-525 ◽  
Author(s):  
Marcello Romano ◽  
Brij N. Agrawal
Keyword(s):  
Speed Control ◽  
Variable Speed ◽  
Attitude Dynamics ◽  
Control Moment ◽  
Variable Speed Control

Geometric Mechanics Based Modeling of the Attitude Dynamics and Control of Spacecraft With Variable Speed Control Moment Gyroscopes

2013 ◽  
Author(s):  
V. Sasi Prabhakaran ◽  
Amit K. Sanyal ◽  
Frederick Leve ◽  
N. Harris McClamroch
Keyword(s):  
Degrees Of Freedom ◽  
Variational Principles ◽  
Speed Control ◽  
Variable Speed ◽  
Attitude Dynamics ◽  
Dynamics Model ◽  
Multiple Control ◽  
Control Moment ◽  
Control Moment Gyroscopes ◽  
Variable Speed Control

The attitude dynamics of a spacecraft with a variable speed control moment gyroscope (VSCMG), in the presence of external torques and internal inputs, is derived using variational principles. A complete dynamics model, that relaxes some of the assumptions made in prior literature on control moment gyroscopes, is obtained. A non-standard VSCMG model, that has an offset between the center of the gimbal axis and the center of the rotor (flywheel) is considered. The dynamics equations show the complex nonlinear coupling between the internal degrees of freedom associated with the VSCMG and the spacecraft base body’s attitude degrees of freedom. Some of this coupling is induced by the non-zero offset between the gimbal axis and the rotor center. This dynamics model is then generalized to include the effects of multiple control moment gyroscopes placed in the base body with non-parallel gimbal axes. It is shown that the dynamical coupling can improve the control authority on the angular momentum of the base body of the spacecraft using changes in the momentum variables of the VSCMG. Numerical simulations confirm the use of these VSCMGs for attitude control for a given de-tumbling maneuver.

Convex Optimization for Power Tracking of Double-Gimbal Variable-Speed Control Moment Gyroscopes

2018 ◽  
Vol 55 (3) ◽  
pp. 541-551 ◽  
Author(s):  
Takahiro Sasaki ◽  
John Alcorn ◽  
Hanspeter Schaub ◽  
Takashi Shimomura
Keyword(s):  
Convex Optimization ◽  
Speed Control ◽  
Variable Speed ◽  
Control Moment ◽  
Control Moment Gyroscopes ◽  
Variable Speed Control

scholarly journals Integrated Power and Attitude Control Design of Satellites Based on a Fuzzy Adaptive Disturbance Observer Using Variable-Speed Control Moment Gyros

2016 ◽  
Vol 2016 ◽  
pp. 1-13 ◽  
Author(s):  
Zhongyi Chu ◽  
Jing Cui
Keyword(s):  
Attitude Control ◽  
Disturbance Observer ◽  
Peak Power ◽  
Speed Control ◽  
Variable Speed ◽  
Control Approach ◽  
Small Satellites ◽  
Control Moment ◽  
Fuzzy Adaptive ◽  
Variable Speed Control

To satisfy the requirements for small satellites that seek agile slewing with peak power, this paper investigates integrated power and attitude control using variable-speed control moment gyros (VSCMGs) that consider the mass and inertia of gimbals and wheels. The paper also details the process for developing the controller by considering various environments in which the controller may be implemented. A fuzzy adaptive disturbance observer (FADO) is proposed to estimate and compensate for the effects of equivalent disturbances. The algorithms can simultaneously track attitude and power. The simulation results illustrate the effectiveness of the control approach, which exhibits an improvement of 80 percent compared with alternate approaches that do not employ a FADO.

Sign in / Sign up

Export Citation Format

Share Document