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A QFT SUBSONIC ENVELOPE FLIGHT CONTROL SYSTEM DESIGN
Author(s) -
Phillips S. N.,
Pachter M.,
Houpis C. H.,
Rasmussen S. J.
Publication year - 1997
Publication title -
international journal of robust and nonlinear control
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.361
H-Index - 106
eISSN - 1099-1239
pISSN - 1049-8923
DOI - 10.1002/(sici)1099-1239(199706)7:6<581::aid-rnc292>3.0.co;2-q
Subject(s) - flight envelope , envelope (radar) , engineering , control theory (sociology) , moment of inertia , flight control surfaces , control (management) , control system , quantitative feedback theory , control engineering , aerospace engineering , robust control , computer science , aerodynamics , physics , radar , electrical engineering , quantum mechanics , artificial intelligence
An aircraft's response to control inputs varies widely throughout its full flight envelope. Furthermore, the aircraft configuration impacts control response through variations in centre of gravity and moments of inertia. Quantitative feedback theory (QFT) is a robust control system design method which provides a full‐envelope flight control system design and gives the engineer direct control over compensator order and gain. A full subsonic flight envelope FCS is designed for using QFT for four representative aircraft configurations. Flying qualities are embedded in the longitudinal design by using a control variable which varies with the aircraft's energy state throughout the flight envelope. Linear simulations with realistically large control inputs are used to validate the design. © 1997 by John Wiley & Sons, Ltd. This paper was prepared under the auspices of the US Government and it is therefore not subject to copyright in the US.