EFFECTS OF CONTROLS DEGRADATION ON FLIGHT MISSION OF REENTRY VEHICLE

For a lifting body type reentry vehicle, an emergency scenario featuring blocking of an aerodynamic control surface (body flap) is considered. It is shown how the emergency scenario can be coped with using other available control mechanisms. Modification of the guidance strategy related to appropriate emergency trajectories yields an improvement for mission aborts. Thus, extreme control moments can be avoided which are required if the nominal flight path is maintained.