2-SPEED, a single-gimbal control moment gyro attitude control system

1973 ◽  
Author(s):  
J. CRENSHAW
Keyword(s):  
Control System ◽  
Attitude Control ◽  
Attitude Control System ◽  
Control Moment ◽  
Control Moment Gyro

Development experience of the attitude control system using single-axis control moment gyros for long-term orbiting space stations

1988 ◽  
Vol 18 ◽  
pp. 91-98 ◽  
Author(s):  
V.N. Branets ◽  
D.M. Weinberg ◽  
V.P. Verestchagin ◽  
N.N. Danilov-Nitusov ◽  
V.P. Legostayev ◽  
...  
Keyword(s):  
Control System ◽  
Attitude Control ◽  
Attitude Control System ◽  
Control Moment ◽  
Development Experience

Comparing fluid ring and CMG servomechanisms for active control of rigid satellites

2018 ◽  
Vol 90 (6) ◽  
pp. 896-905 ◽  
Author(s):  
Saleh Akbaritabar ◽  
Reza Esmaelzadeh ◽  
Reza Zardashti
Keyword(s):  
Attitude Control ◽  
Design Methodology ◽  
Torque Control ◽  
Performance Parameters ◽  
Attitude Control System ◽  
Content Type ◽  
Control Moment ◽  
Attitude Maneuver ◽  
Control Moment Gyro ◽  
Practical Implications

Purpose This paper aims to describe a novel type of attitude control system (ACS) in different configurations. This servomechanism is compared with control moment gyro (CMG) in significant parameters of performance for ACS of rigid satellite. Design/methodology/approach This new actuator is the fluid containing one or more rings and fluid flow is supplied by pump. The required torque control is obtained by managing fluid angular velocity. The cube-shaped satellite with three rings of fluid in the principle axes is considered for modeling. The satellite is considered rigid and nonlinear dynamics equation is used for it. In addition, the failure of the pyramid-shaped satellite with an additional ring fluid is discussed. Findings The controller model for four fluid rings has more complexity than for three fluid rings. The simulation results illustrated that four fluid rings need less energy for stabilization than three fluid rings. The performance of this type of actuator is compared with CMG. At last, it is demonstrated that performance parameters are improved with fluid ring actuator. Research limitations/implications Fluid ring actuator can be affected by environmental pressure and temperature. Therefore, freezing and boiling temperature of the fluid should be considered in system designation. Practical implications Fluid ring servomechanism can be used as ACS in rigid satellites. This actuator is compared by CMG, the prevalent actuator. It has less displacement attitude maneuver. Originality/value The results provide the feasibility and advantages of using fluid rings as satellite ACS. The quaternion error controller is used for this model to enhance its performance.

Performance Evaluation of Two Nonlinear Controllers on an Attitude System Using SGCMG

2015 ◽  
Author(s):  
Juan Sebastian Nuñez Gamboa ◽  
Juan David López
Keyword(s):  
Control System ◽  
Power Systems ◽  
Dynamic Model ◽  
Attitude Control ◽  
Sliding Mode ◽  
Attitude Control System ◽  
Unknown Parameters ◽  
Control Moment ◽  
Nonlinear Controllers ◽  
New States

This paper deals with the modeling and simulation of an attitude control system composed of three Single Gimbal Control Moment Gyroscopes (SGCMG) in a pyramidal configuration using two nonlinear controllers. The first controller is a first-order sliding mode which is robust to bounded uncertainties such as modeling simplifications, sensor noise and external disturbances, but it causes high frequency input, which can exceed the limit of the power systems. To overcome the drawback of the sliding mode, an I&I adaptive control is proposed. This controller estimates unknown parameters by introducing new states, resulting in smaller input gains and frequencies. At first, the dynamic model of SGCMG and the dynamic model of the attitude system were constructed. Based on this model, the steering laws of the SGCMG’s for the two nonlinear controllers were designed. The simulation of the attitude control system is implemented in MATLAB. The simulation results show the effectiveness and the advantages of the proposed controllers.

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