Abstract
Dynamic analysis and control system design for aerial refueling hose-drogue systems during a receiver-probe coupling phase are studied. When a receiver plane approaches to couple with a refueling drogue, the hose-drogue system undergoes transient motion due to the receiver fore-body aerodynamic effect in addition to the tanker motion and downwash, and atmospheric turbulence. At the moment of contact with the drogue, the drag force on the drogue drops resulting in erratic motion of the refueling hose due to loss of tension. Unless carefully regulated, this may lead to critical damages to the refueling assembly and the receiver probe. In this paper, a hose-drogue dynamic model previously developed by the authors is extended to study 1) the receiver fore-body aerodynamic effect on the drogue transient motion prior to coupling, 2) the wave motion of the drogue-hose system due to the tension change in the hose, and 3) some possible active control strategies for the hose-drogue system during the preand the postcontact with the receiver probe.
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