Method and system for controlling the elevator assemblies of an

Details Method and system for controlling the elevator assemblies of an Method and system for controlling the elevator assemblies of an

1987-09-09

1988-08-23

Barefoot, Galen

Aeronautics and astronautics

Aircraft control

244 87, 244228, B64C 1300

Patent

active

047655682

ABSTRACT:
A fly-by-wire control system for the elevator assemblies of an aircraft is quipped with a mechanical auxiliary control (8) and with a synchronizing coupling (10). The electrical control links connecting the controlling computers to the elevator drives are each equipped with an override mechanism (4,2). A mechanical cable link (9) of the auxiliary mechanical control (8) connects a pilot operated mechanical control member such as a pitch control wheel having a detent to the respective override mechanism. This combination makes sure that the pilot initiated control signals have performance priority over any other signals at all times. The synchronizing coupling (10) is arranged between the mechanical control links leading to the respective elevator flap drives to assure a symmetric flap deflection on both sides at high speed flight under failure conditions. Centering springs (12) assure a centered position of the flap if the respective flap side signal transmission linkage (4.4) is affected by a mechanical failure (rupture) at low speed.

REFERENCES:
patent: 2704646 (1955-03-01), Vogel
patent: 2869385 (1959-01-01), Geyer
patent: 3773282 (1973-11-01), Sands et al.

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