Authority limiter

Details Authority limiter Authority limiter

1987-04-16

1989-04-18

Ro, Bentsu

Electricity: motive power systems

Torquing motors

318434, G05B 1700, B64C 318

Patent

active

048230634

ABSTRACT:
An authority limiter includes an input shaft clutched to an output shaft. The output shaft is geared to a motor. Opto-sensors, variable resistors or Hall effect devices provide control signals to a current source supplying power to the motor. Different amounts of opposing torque are applied by the motor dependent upon the positioning of a disc, mechanically attached to the output shaft, that is sensed by the detecting devices. By sensing various angular deviations from a null position, scheduled degrees of torque are applied to the input and output shafts. In another embodiment, the disc is coupled to the output shaft by an auxiliary clutch. When the electrical power is removed from both clutches and the motor, a rotational centering means moves the disc back to a null position with respect to the limiter. Fault monitoring circuitry is provided to disengage the authority limiter when a fault occurs. Finally, solid state switches are provided for interfacing with the aircraft and for enablement of associated devices or satisfactory engagement of the clutch.

REFERENCES:
patent: 2871436 (1959-01-01), Kafferty
patent: 3405337 (1968-10-01), Papik
patent: 4063140 (1977-12-01), Kammerer
patent: 4255694 (1981-03-01), Mozris et al.
patent: 4281811 (1981-08-01), Nixon
patent: 4376262 (1983-03-01), Okuda et al.
patent: 4464661 (1984-08-01), Redmond
patent: 4599698 (1986-07-01), Fischer et al.
patent: 4605886 (1986-08-01), Inoue
patent: 4638229 (1987-01-01), Birkedahl
patent: 4677355 (1987-06-01), Baumann
patent: 4683407 (1987-07-01), Baiba et al.
"Hall Effect IC Operations" a pamphlet published by Sprague Electric Company, Concord, N.H., 1985.

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