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Approach trajectory planning system for maximum concealmentA computer-simulation study was undertaken to investigate a maximum concealment guidance technique (pop-up maneuver), which military aircraft may use to capture a glide path from masked, low-altitude flight typical of terrain following/terrain avoidance flight enroute. The guidance system applied to this problem is the Fuel Conservative Guidance System. Previous studies using this system have concentrated on the saving of fuel in basically conventional land and ship-based operations. Because this system is based on energy-management concepts, it also has direct application to the pop-up approach which exploits aircraft performance. Although the algorithm was initially designed to reduce fuel consumption, the commanded deceleration is at its upper limit during the pop-up and, therefore, is a good approximation of a minimum-time solution. Using the model of a powered-lift aircraft, the results of the study demonstrated that guidance commands generated by the system are well within the capability of an automatic flight-control system. Results for several initial approach conditions are presented.
Document ID
19880002053
Acquisition Source
Legacy CDMS
Document Type
Technical Memorandum (TM)
Authors
Warner, David N., Jr.
(NASA Ames Research Center Moffett Field, CA, United States)
Date Acquired
September 5, 2013
Publication Date
July 1, 1986
Subject Category
Numerical Analysis
Report/Patent Number
A-86264
NASA-TM-88258
NAS 1.15:88258
Accession Number
88N11435
Funding Number(s)
PROJECT: RTOP 505-66-11
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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