NASA Logo, External Link
Facebook icon, External Link to NASA STI page on Facebook Twitter icon, External Link to NASA STI on Twitter YouTube icon, External Link to NASA STI Channel on YouTube RSS icon, External Link to New NASA STI RSS Feed AddThis share icon
 

Record Details

Record 40 of 58436
Energy management of three-dimensional minimum-time intercept. [for aircraft flight optimization]
Author and Affiliation:
Kelley, H. J.(Virginia Polytechnic Inst. and State Univ., Blacksburg, VA, United States)
Cliff, E. M.(Virginia Polytechnic Institute and State University, Blacksburg, United States)
Visser, H. G.(Virginia Polytechnic Inst. and State Univ., Blacksburg, VA, United States)
Abstract: A real-time computer algorithm to control and optimize aircraft flight profiles is described and applied to a three-dimensional minimum-time intercept mission. The proposed scheme has roots in two well known techniques: singular perturbations and neighboring-optimal guidance. Use of singular-perturbation ideas is made in terms of the assumed trajectory-family structure. A heading/energy family of prestored point-mass-model state-Euler solutions is used as the baseline in this scheme. The next step is to generate a near-optimal guidance law that will transfer the aircraft to the vicinity of this reference family. The control commands fed to the autopilot (bank angle and load factor) consist of the reference controls plus correction terms which are linear combinations of the altitude and path-angle deviations from reference values, weighted by a set of precalculated gains. In this respect the proposed scheme resembles neighboring-optimal guidance. However, in contrast to the neighboring-optimal guidance scheme, the reference control and state variables as well as the feedback gains are stored as functions of energy and heading in the present approach. Some numerical results comparing open-loop optimal and approximate feedback solutions are presented.
Publication Date: Jan 01, 1985
Document ID:
19850061690
(Acquired Nov 28, 1995)
Accession Number: 85A43841
Subject Category: AIRCRAFT STABILITY AND CONTROL
Report/Patent Number: AIAA PAPER 85-1781
Document Type: Conference Paper
Publication Information: (SEE A85-43826 21-08)
Publisher Information: United States
Meeting Information: Atmospheric Flight Mechanics Conference; 12th; August 19-21, 1985; Snowmass, CO
Financial Sponsor: NASA; United States
Organization Source: Virginia Polytechnic Inst. and State Univ.; Blacksburg, VA, United States
Description: 11p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: AIRCRAFT GUIDANCE; FIGHTER AIRCRAFT; FLIGHT OPTIMIZATION; INTERCEPTION; OPTIMAL CONTROL; CONTROL THEORY; FEEDBACK CONTROL
Imprint And Other Notes: IN: Atmospheric Flight Mechanics Conference, 12th, Snowmass, CO, August 19-21, 1985, Technical Papers (A85-43826 21-08). New York, AIAA, 1985, p. 136-146. NASA-supported research.
Availability Source: Other Sources
› Back to Top
Find Similar Records
NASA Logo, External Link
NASA Official: Gerald Steeman
Site Curator: STI Program
Last Modified: August 18, 2011
Contact Us