Global Magnetic Attitude Control of Inertially Pointing Spacecraft

Lovera, Marco; Astolfi, Alessandro

doi:10.2514/1.11844

Cited by 69 publications

(55 citation statements)

References 14 publications

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“…Moreover, the magnitude of the magnetic torque is relatively small; hence rapid maneuver is no longer flexible. Luckily, three-axis magnetic stabilization such as Sun-pointing or Earth-pointing stabilization is still possible as the magnetic field varies along the considered orbit [15]. A pure magnetic control algorithm is introduced as [15] T c = −J −1 (ε 2 k sign(q e )q e + εcω),…”

Section: Attitude Control Strategy Designmentioning

confidence: 99%

Failure-tolerant control for small agile satellites using single-gimbal control moment gyros and magnetic torquers

Meng

Matunaga

2012

Acta Mech Sin

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This paper focuses on the attitude control problem of small agile satellites using single-gimbal control moment gyros (CMG) and magnetic torquers (MTQ). CMGs are regarded as effective torque generators for agile satellites because of their torque amplification capability. However, they are vulnerable to failure due to their complex inner mechanism. In this paper, different failure cases of CMGs are analyzed. A flexible failure-tolerant control strategy is developed by automatically redistributing the required control torque among the operating CMGs and MTQs, with a variable limiter to accommodate the actuator dynamics changes introduced by CMG failures. The performances of maneuvers about different directions under different failure cases are also discussed and examined. Numerical simulations demonstrate that the proposed strategy maintains certain agility in the cases of one or two CMGs failing. Moreover, a survival strategy with only one CMG left is also verified. Both sun-pointing stabilization and earth-pointing stabilization can be achieved in this case, which fulfill some basic mission requirements.

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Section: Attitude Control Strategy Designmentioning

confidence: 99%

Failure-tolerant control for small agile satellites using single-gimbal control moment gyros and magnetic torquers

Meng

Matunaga

2012

Acta Mech Sin

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“…This general question is of particular importance in various fields, and in particular for the problem of orientation control. As is well described in [1], most existing control methods for such second order dynamics require angular velocity information [2][3][4]. The list of typical control methods employing this information is vast, ranging from Lyapunov control design, feedback linearization, to the computed torque method.…”

Section: Introductionmentioning

confidence: 99%

Angular velocity nonlinear observer from vector measurements

Magnis

Petit

2017

Automatica

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International audienceThis paper proposes a technique to estimate the angular velocity of a rigid body from vector measurements. Compared to the approaches presented in the literature, it does not use attitude information nor rate gyros as inputs. Instead, vector measurements are directly filtered through a nonlinear observer estimating the angular velocity. Convergence is established using a detailed analysis of the linear-time varying dynamics appearing in the estimation error equation. This equation stems from the classic Euler equations and measurement equations. A high gain design allows to establish local uniform exponential convergence. Simulation results are provided to illustrate the method

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“…This article considers the question of estimating the angular velocity of a rigid body from signals from embedded sensors. This general question is of particular importance in various fields of engineering, and in particular for the problem of orientation control, as shown in numerous applications [1], [2], [3], [4] for spacecraft, unmanned aerial vehicles, guided ammunitions, to name a few.…”

Section: Introductionmentioning

confidence: 99%

Angular Velocity Nonlinear Observer From Single Vector Measurements

Magnis

Petit

2016

IEEE Trans. Automat. Contr.

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International audienceThe paper proposes a technique to estimate the angular velocity of a rigid body from single vector measurements. Compared to the approaches presented in the literature, it does not use attitude information nor rate gyros as inputs. Instead, vector measurements are directly filtered through a nonlinear observer estimating the angular velocity. Convergence is established using a detailed analysis of a linear-time varying dynamics appearing in the estimation error equation. This equation stems from the classic Euler equations and measurement equations. As is proven, the case of free-rotation allows one to relax the persistence of excitation assumption. Simulation results are provided to illustrate the method

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Global Magnetic Attitude Control of Inertially Pointing Spacecraft

Cited by 69 publications

References 14 publications

Failure-tolerant control for small agile satellites using single-gimbal control moment gyros and magnetic torquers

Failure-tolerant control for small agile satellites using single-gimbal control moment gyros and magnetic torquers

Angular velocity nonlinear observer from vector measurements

Angular Velocity Nonlinear Observer From Single Vector Measurements

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