NEAR MINIMUM-TIME 3-DIMENSIONAL MANEUVERS OF RIGID AND FLEXIBLE SPACECRAFT
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An approach is presented to accomplish large angle, nonlinear, three dimensional attitude maneuvers in either near minimum-time or near minimum-fuel. The method permits the specification of a torque shaped reference maneuver of the near minimum-time (bang-bang) or near minimum-fuel (bang-off-bang) type; the instantaneous switches are replaced by controllably sharp spline switches to reduce excitation of flexible degrees of freedom. A Lyapunov method is used to design tracking-type control perturbations to suppress errors due to disturbances and model errors. The method is illustrated by numerical simulations and some experimental results using the ASTREX test article.
author list (cited authors)
BELL, M. J., & JUNKINS, J. L.