TIME-OPTIMAL MAGNETIC ATTITUDE MANEUVERS
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Time-optimal magnetic attitude maneuvers for near-earth, spin-stabilized spacecraft are treated using Pontryagin's Principle. A nonlinear bang-bang switching function is derived for the electromagnets' polarity. The approach is quite general, allowing user prescribed orbit dynamics models and geomagnetic field models. For the case of a single electromagnet aligned with the nominal spin axis of a symmetric satellite, and retaining general orbit and geomagnetic models, the determination of time optimal magnetic maneuvers reduces to a bounded one-dimensional search of an initial costate variable. The formulation is used to construct extremal field maps of typical optimal maneuvers.
JOURNAL OF GUIDANCE AND CONTROL
author list (cited authors)
JUNKINS, J. L., CARRINGTON, C. K., & WILLIAMS, C. E.
complete list of authors
JUNKINS, JL||CARRINGTON, CK||WILLIAMS, CE