Article (Scientific journals)
Hybrid Attitude Control for Nano-Spacecraft: Reaction Wheel Failure and Singularity Handling
Mahfouz, Ahmed; Pritykin, Dmitry; Biggs, James
2020In Journal of Guidance Control and Dynamics, 44 (3), p. 548-558
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Keywords :
Attitude Dynamics; Reaction Wheels; Bias Momentum Spacecraft; Actuators; CubeSat; Quaternions; Earth's Magnetic Field; Earth; Earth Centered Inertial; Numerical Simulation
Abstract :
[en] This paper addresses the attitude control of nano-spacecraft with three reaction wheels and three magnetorquers in low Earth orbits, and develops algorithms to maintain control when any one of the reaction wheels completely fails. In the event of a reaction wheel failure, it is shown that the key challenge of maintaining accurate autonomous three-axis tracking is a problem of singularity avoidance in control allocation. In particular, control law singularities occur depending on the type of orbit, the environment, and the attitude, where the system is no longer controllable. Two algorithmic singularity avoidance techniques based on singularity prediction and artificial potential functions are proposed. In addition, an optimized reaction wheel configuration is proposed to enhance singularity avoidance capability. To illustrate the effectiveness of the singularity avoidance control laws, they are tested in simulations that include the effects of perturbing environmental torques, reaction wheel jitter, and actuator misalignment.
Disciplines :
Aerospace & aeronautics engineering
Author, co-author :
Mahfouz, Ahmed  ;  Skolkovo Institute of Science and Technology - Skoltech > Space Center
Pritykin, Dmitry;  Skolkovo Institute of Science and Technology - Skoltech > Space Center > Senior research scientis
Biggs, James;  Polytechnic University of Milan > Aerospace Science and Technology > Associate Professor
External co-authors :
yes
Language :
English
Title :
Hybrid Attitude Control for Nano-Spacecraft: Reaction Wheel Failure and Singularity Handling
Publication date :
December 2020
Journal title :
Journal of Guidance Control and Dynamics
ISSN :
1533-3884
Publisher :
American Institute of Aeronautics and Astronautics, Reston, United States - District of Columbia
Volume :
44
Issue :
3
Pages :
548-558
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBilu :
since 31 August 2021

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