On-Line Trajectory Generation for Hypersonic Vehicles
Daniel Allwine, Joseph Fisher, Jeremy Strahler, Douglas A. Lawrence, Michael Oppenheimer, David Doman · AIAA Guidance, Navigation, and Control Conference and Exhibit · 2005
This paper describes the development of a comprehensive on-line trajectory generation system that features a novel trajectory design methodology integrated with an innovative on-line aerodynamic identification architecture. The trajectory design methodology employs computationally efficient algorithms yielding feasible trajectories that accommodate degraded vehicle performance resulting from unanticipated vehicle damage and/or malfunction. The aerodynamic identification scheme uses on-line measurements to produce a global estimate of the vehicle's aerodynamic characteristics augmented with local corrections. The end result is a global aerodynamic database for the degraded vehicle from which global aerodynamic constraint estimates are derived and utilized in the trajectory reshaping/retargeting process as well as in the reconfigurable control system.