Optimal flight guidance for aircraft in windshear

Details Optimal flight guidance for aircraft in windshear Optimal flight guidance for aircraft in windshear

1988-05-02

1989-09-05

Barefoot, Galen

Aeronautics and astronautics

Aircraft control

Automatic

244182, 244 76C, 364427, 364433, B64C 1316

Patent

active

048631205

ABSTRACT:
An aircraft guidance system for optimizing the flight path of an aircraft in the presence of a windshear maximizes the time the aircraft remains in the air and the distance traveled regardless of the magnitude of the windshear, in the presence of horizontal or vertical windshear components, while effectively minimizing excitation of the aircraft's phugoid mode. A flight path angle is commanded sufficient to clear any obstacle that may be found in the airport vicinity. For longitudinal or horizontal shears, a slightly positive constant flight path angle which is a function of the magnitude of the vertical wind is added to the slightly positive flight path angle command to produce a modified command that compensates for the decrease in flight path angle relative to the ground caused by the vertical wind. The system inhibits exceeding stick shaker angle of attack by reducing the command signal until the actual angle of attack is equal to or less than the stick shaker angle of attack.

REFERENCES:
patent: 3927306 (1975-12-01), Miller
patent: 3994455 (1976-11-01), Simpson
patent: 4079905 (1978-03-01), Greene
patent: 4281383 (1981-07-01), Lebrun
patent: 4347572 (1982-08-01), Berwick, Jr. et al.
patent: 4589020 (1986-05-01), Kyrazis
patent: 4591113 (1986-05-01), Mabey
patent: 4593285 (1986-06-01), Miller et al.
"Windshear Escape", Jul. 6, 1985, Transport Press a div of BPI Ltd.

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