+ Visit NASA.gov + Contact NASA   + Home Collection > NASA  Author > Alag, G. S.  Author > Kempel, R. W.  Author > Pahle, J. W.  NASA Center > Dryden Flight Research Center  Publication Year > 1981-1990 > 1986  Subject > A-C > Aircraft Stability And Control  Availability Options > Order From Other Sources  Item/Media Type > Conference Paper  Note: Start a new navigation search by selecting a link above     Previous Record | Next Record + Back to Results   + Printer Friendly Title: Decoupling control synthesis for an oblique-wing aircraft Author(s): Alag, G. S.; Kempel, R. W.; Pahle, J. W. Abstract: Interest in oblique-wing aircraft has surfaced periodically since the 1940's. This concept offers some substantial aerodynamic performance advantages but also has significant aerodynamic and inertial cross-coupling between the aircraft longitudinal and lateral-directional axes. This paper presents a technique for synthesizing a decoupling controller while providing the desired stability augmentation. The proposed synthesis procedure uses the concept of a real model-following control system. Feedforward gains are selected on the assumption that perfect model-following conditions are satisfied. The feedback gains are obtained by using eigensystem assignment, and the aircraft is stabilized by using partial state feedback. The effectiveness of the control laws developed in achieving the desired decoupling is illustrated by application to linearized equations of motion of an oblique-wing aircraft for a given flight condition. NASA Center: Dryden Flight Research Center Publication Date: JAN 1, 1986 Document Source: Other Sources No Digital Version Available: Go to Tips On Ordering Document ID: 19870026068 Accession ID: 87A13342 Publication Information: Number of Pages = 9 Keywords: AIRCRAFT CONTROL; ASYMMETRY; AUTOMATIC CONTROL; CROSS COUPLING; DECOUPLING; EIGENVALUES; FEEDFORWARD CONTROL; FLIGHT CONTROL; LATERAL CONTROL; LONGITUDINAL CONTROL; OBLIQUE WINGS; AERODYNAMIC FORCES; EQUATIONS OF MOTION; LINEAR EQUATIONS; Notes: IN: 1986 American Control Conference, 5th, Seattle, WA, June 18-20, 1986, Proceedings. Volume 1 (A87-13301 03-63). New York, Institute of Electrical and Electronics Engineers, 1986, p. 472-480. Previously announced in STAR as N86-26339. Accessibility: Unclassified; Copyright; Unlimited; Publicly available; Updated/Added to NTRS: 2004-11-03 + Back to Top + Sponsored by the NASA Scientific and Technical    Information Program + 2004 Vision for Space Exploration + Freedom of Information Act + NASA Web Privacy Policy and Important Notices + NASA Disclaimers, Copyright Notice,    and Terms and Conditions of Use NASA Official: Calvin Mackey Page Curator: NASA Center for AeroSpace Information (help@sti.nasa.gov) Last Updated: July 5, 2007