Accession Number : ADD011387

Title :   Aircraft Thrust Control Scheme for Terrain Following System.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE AIR FORCE WASHINGTON DC

Personal Author(s) : Kendig,W C

Report Date : 21 Aug 1984

Pagination or Media Count : 11

Abstract : This system permits speed variation within certain constraints. The minimum speed is derived from a stall avoidance or acceleration margin condition and the maximum speed may be the lower limit of the transonic region or other design limit. Assuming the throttle is set at or near a trim village, adjustments need only be made if the terrain following flight path is tending to drive the speed to one of the two velocity extremes. Velocity predictions are based on predicted kinetic energy being equal to the difference between the current kinetic energy and the potential energy to the profile extreme. The throttle is adjusted when the predicted velocity is outside the limits to add or remove the required amount of energy. (Author)

Descriptors :   *Patents, *Flight control systems, *Thrust control, *Terrain following, *Flight paths, Flight speeds, Stalling, Avoidance, Acceleration, Transonic flight, Throttling, Velocity, Kinetic energy, Potential energy, Algorithms

Subject Categories : Aircraft

Distribution Statement : APPROVED FOR PUBLIC RELEASE