Multi-motor actuation system for a power drive unit

Details Multi-motor actuation system for a power drive unit Multi-motor actuation system for a power drive unit

1983-07-11

1985-08-06

Blix, Trygve M.

Aeronautics and astronautics

Aircraft control

Automatic

244 76R, 91509, 91510, B64C 1342

Patent

active

045330972

ABSTRACT:
The invention is directed to a multi-motor actuation system for a power drive unit. The system includes three independently hydraulically controlled motors adapted to be drivingly coupled to a power drive unit output. Two of the said motors are normally active at all times and the third motor acts as a back-up motor to provide redundancy for the two normally active motors. A hydraulic failure detection mechanism is controllingly coupled to the three independently hydraulically controlled motors. The hydraulic failure detection mechanism is responsive to any failure of one of the normally active hydraulically controlled motors to thereby cause the third motor to be coupled to the power drive unit. The failure detection mechanism is additionally responsive to a failure of both normally active hydraulically controlled motors to cause the third motor to take over the functions of both of the normally active hydraulically controlled motors.

REFERENCES:
patent: 3338138 (1967-08-01), Wood
patent: 3338139 (1967-08-01), Wood
patent: 3426650 (1969-02-01), Jenney
patent: 3505929 (1970-04-01), Coppola
patent: 3877346 (1975-04-01), Koopmann et al.
Hydraulics & Pneumatics, "Airbus Hydraulic Power Always Available", pp. 57-60, vol. 25, No. 12, Dec. 1972.

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