AbstractThe present research addresses the satellite reaction wheel (RW) nonlinear electromechanical coupling dynamics including dynamic eccentricity of brushless dc (BLDC) motor and gyroscopic effects, as well as dry friction of shaft-bearing joints (relative small slip) and bearing friction. In contrast to other studies, the rotational velocity of the flywheel is considered to be controllable, so it is possible to study the reaction wheel dynamical behavior in acceleration stages. The RW is modeled as a three-phases BLDC motor as well as flywheel with unbalances on a rigid shaft and flexible bearings. Improved Lagrangian dynamics for electromechanical systems is used to obtain the mathematical model of the system. The developed model can properly describe electromechanical nonlinear coupled dynamical behavior of the satellite RW. Numerical simulations show the effectiveness of the presented approach.
Highlights8 DOF Nonlinear electromechanical coupling dynamic of a reaction wheel is modeled.It includes dynamic eccentricity of BLDC motor, unbalances and gyroscopic effects.Some mechanical parameters and viscous friction effects on RW behavior are studied.Synergy effect of micro-movements on shaft-bearing attachment point is considered.
Nonlinear electromechanical modelling and dynamical behavior analysis of a satellite reaction wheel
Acta Astronautica ; 141 ; 143-157
2017-10-04
15 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Europäisches Patentamt | 2022
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