Paper: Design of nonlinear automatic flight control systems

Authors:
William L. Garrard;John M. Jordan
Affiliations:
Dept. of Aerospace Engineering and Mechanics, University of Minnesota, Minneapolis, Minnesota 55455, U.S.A.;Redstone Arsenal, Huntsville, Alabama 35809, U.S.A.
Venue:
Automatica (Journal of IFAC)
Year:
1977

Citing 3
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Spectral homotopy analysis method and its convergence for solving a class of nonlinear optimal control problems

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Abstract

A method for the synthesis of nonlinear automatic flight control systems is developed, and the performance of a control system synthesized by use of this method is compared to the performance of control system designed by use of linear quadratic optimal control theory. Comparisons are made on the basis of aircraft dynamic response at high angles of attack. It is found that the nonlinear controller reduces the altitude loss during stall and increases the magnitude of the angle of attack for which the aircraft can recover from stall.