The extension of an adaptive aircraft control concept to helicopters.
Hood, John McCoy Jr.
Layton, Donald M.
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A basic adaptive control scheme for fixed-wing aircraft was modified for use in controlling the longitudinal motion of helicopters. The modification required the addition of two additional feedback variables. Control was applied only to the cyclic pitch input and not to the collective input. It was assumed that a coefficient, the cyclic-pitch control effectiveness, would not change sign throughout the flight envelope. Analog computer simulation showed that the modified system was capable of stabilizing the model used. The handling qualities of the system were not completely satisfactory and further work is necessary.
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