Steering Law of Control Moment Gyros Using Optimization of Initial Gimbal Angles for Satellite Attitude Control

Nanamori, Yasuyuki; Takahashi, Masaki

doi:10.1299/kikaic.74.2698

Cited by 7 publications

(2 citation statements)

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“…The law can avoid singularity to a certain extent, but the effect of escaping singularity is not ideal. In 2010, Takada et al [5] proposed the CMG singularity avoidance control law based on a singular surface cost function, which avoids the internal singularity of the system by introducing torque error. In 2011, Nanamori et al [6] proposed a new optimal initial frame angle control law without knowing the trajectory of the desired torque in advance.…”

Section: Introductionmentioning

confidence: 99%

Cooperative game theory-based steering law design of a CMG system

Hua

Zheng

et al. 2023

J. of Syst. Eng. Electron.

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Spacecraft require a large-angle manoeuvre when performing agile manoeuvring tasks, therefore a control moment gyroscope (CMG) is employed to provide a strong moment. However, the control of the CMG system easily falls into singularity, which renders the actuator unable to output the required moment. To solve the singularity problem of CMGs, the control law design of a CMG system based on a cooperative game is proposed. First, the cooperative game model is constructed according to the quadratic programming problem, and the cooperative strategy is constructed. When the strategy falls into singularity, the weighting coefficient is introduced to carry out the strategy game to achieve the optimal strategy. In theory, it is proven that the cooperative game manipulation law of the CMG system converges, the sum of the CMG frame angular velocities is minimized, the energy consumption is small, and there is no output torque error. Then, the CMG group system is simulated. When the CMG system is near the singular point, it can quickly escape the singularity. When the CMG system falls into the singularity, it can also escape the singularity. Considering the optimization of angular momentum and energy consumption, the feasibility of the CMG system steering law based on a cooperative game is proven.

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Section: Introductionmentioning

confidence: 99%

Cooperative game theory-based steering law design of a CMG system

Hua

Zheng

et al. 2023

J. of Syst. Eng. Electron.

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show abstract

“…Applying the propesed method reduces the probability of failure of the CMG at the end stage of the design lifetime. In more detai1, the proposed steering law levels the gimbal angle displacements of four CMGs in a pyrarnid eonfiguration, and keeps the manipulability greater by utilizing the dependence of each gimbal motion of the CMG on a set ofinitial gimbal angles (Nanamori and Takahashi, 2008). The proposed method changes the set ofinitial gimbal angles by inserting null motion between maneuvers; i.e., it changes the steering path in the angular momentum space of the CMGs subsequently,…”

Section: Introductionmentioning

confidence: 99%

1D14 Steering law considering biased loads for control moment gyroscopes(The 12th International Conference on Motion and Vibration Control)

Nanamori

Takahashi

2014

MoViC

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A new steering law ofcontrol moment gyroscopes (CMGs) is proposed to ensure extended life and to reduce the risk of failure. Because major fallure modes of the CMG are aged deterioration and accumulated fatigue of the gimbal-axis bearing, the proposed method attempts to level gimbal angular displacements and to keep the manipulability greater applying a relation between the gimbal angular displacement of each CMG and the initial condition ofgimbal angles. A suitable set ofinitial gimbal angles is selected using a defined evaluation fimction in an off-line preliminarily calculation, The evaluation function considers the average and variance of the gimbal angular displacement and the manipulability of the upcoming maneuver.The dynamics ofa typical pyrarnid configuration of four single-gimbal CMGs was modeled and a numerical simulation was carried out to evaluate the performance of the proposed method, Numerical simulation confirmed that the proposed method levels the gimbal angular displaeements ofCMGs and keeps the manipulabllity greater, or suppresses radical motion of gimbals without degrading attitude control. The effective of the leveling ofCMG loads was confirmed in the case that the CMGs do not pass a singularity, 1(oj,wotzts : Control Moment Gyros, Attitude control, Steering law, Life extension, SpacecraftThe JapanSocietyoE Mechanical Engineeis

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Steering law considering biased loads for control moment gyroscopes

Nanamori

Takahashi

2015

Mechanical Engineering Journal

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Steering Law of Control Moment Gyros Using Optimization of Initial Gimbal Angles for Satellite Attitude Control

Cited by 7 publications

References 0 publications

Cooperative game theory-based steering law design of a CMG system

Cooperative game theory-based steering law design of a CMG system

1D14 Steering law considering biased loads for control moment gyroscopes(The 12th International Conference on Motion and Vibration Control)

Steering law considering biased loads for control moment gyroscopes

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