Differentially coupled dual channel actuator

Details Differentially coupled dual channel actuator Differentially coupled dual channel actuator

1987-10-05

1989-05-30

Barefoot, Galen

Aeronautics and astronautics

Aircraft control

74526, 74675, 74799, B64C 1334

Patent

active

048343196

ABSTRACT:
A dual channel actuator for regulating control surfaces of an aircraft such as a helicopter. Primary and secondary channels are coupled by a differential gear. An internal stop in the differential gear limits the short term range of travel or authority of the primary channel. The secondary channel allows extended long term authority by recentering the reference point about which the rotational range of the primary channel is determined. A servo motor and primary input gear of the differential gear comprise the primary channel. A second servo motor and secondary input gear comprise the secondary channel. The reference point comprises a stop pin coupled with said differential gear.

REFERENCES:
patent: 2620683 (1952-12-01), Geyer
patent: 2704646 (1955-03-01), Vogel
patent: 2951397 (1960-09-01), Schroeder
patent: 3030052 (1962-04-01), Grudin
patent: 3140843 (1964-07-01), Pettit
patent: 3263946 (1966-08-01), Roberts et al.
patent: 3563104 (1971-02-01), Schuster
patent: 3592317 (1971-07-01), Chillson

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