This paper describes the development of a basic terrain avoidance algorithm which is proposed for use with the terrain following algorithm in the Low Altitude Navigation and Targeting Infrared System for Night (LANTIRN). The algorithms were modeled in a digital simulation in which an aircraft is flown over a single-obstacle three-dimensional terrain. Vertical acceleration and roll angle commands are generated in the simulation by the algorithms using terrain data collected from the modeled terrain following radar antenna scan. The response of the aircraft to these commands is determined, and the resulting trajectories over the terrain are displayed.
The development of the criteria for determining when a lateral maneuver is feasible is described, as well as the means of defining the lateral flight path to be flown for terrain avoidance. The process of deriving the equations for computing the roll angle commands to fly the aircraft to the lateral trajectory is also given. The terrain avoidance criteria and roll angle commands are optimized for the single-obstacle terrain. Recommendations are given for further development of the criteria and roll commands when studying the problem for a multi-obstacle terrain.
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Master of Science (M.S.)
College of Engineering
Length of Campus-only Access
Masters Thesis (Open Access)
Frazier, Glenda C., "Study of a Terrain Avoidance Algorithm to be used in Conjunction with the Lantirn Terrain Following System" (1987). Retrospective Theses and Dissertations. 5098.
Contributor (Linked data)
Klee, Harold [VIAF]
Klee, Harold [LC]