Fuel-conservative guidance system for powered-lift aircraftA concept for automatic terminal-area guidance, comprising two modes of operation, has been developed and evaluated in flight tests. In the first or predictive mode, fuel-efficient approach trajectories are synthesized in fast time. In the second or tracking mode, the synthesized trajectories are reconstructed and tracked automatically. An energy rate performance model derived from the lift, drag, and propulsion-system characteristics of the aircraft is used in the synthesis algorithm. The method optimizes the trajectory for the initial aircraft position and wind and temperature profiles encountered during each landing approach. The paper describes the design theory and discusses the results of simulations and flight tests using the Augmentor Wing Jet STOL Research Aircraft.
Document ID
19790061350
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Erzberger, H. (NASA Ames Research Center Moffett Field, CA, United States)
Mclean, J. D. (NASA Ames Research Center Moffett Field, Calif., United States)