Overspeed system redundancy monitor

Details Overspeed system redundancy monitor Overspeed system redundancy monitor

1985-09-18

1987-12-15

Casaregola, Louis J.

Power plants

Combustion products used as motive fluid

Combined with regulation of power output feature

324160, F02C 900

Patent

active

047123729

ABSTRACT:
A redundancy monitor is presented which makes operational checks on the electronic overspeed control system used on aircraft turbine engines. The monitor is a small and lightweight device that can be permanently installed on the engine. Its function is to monitor both the speed pickups that count the revolutions per minute that the turbine shaft is turning and at the same time maintain a check on the performance of the circuitry which processes the data. The monitor includes a latching type BITE indicator which signifies redundant status of the speed pickups and a lamp which lights to indicate any failure in the output circuitry of the overspeed sensor system. A momentary-on type switch activates self test circuitry within the redundancy monitor.

REFERENCES:
patent: 3937014 (1976-02-01), Plant
patent: 3987620 (1976-10-01), Giordano et al.
patent: 4058975 (1977-11-01), Gilbert et al.
patent: 4251873 (1981-02-01), Joby
patent: 4528812 (1985-07-01), Cantwell

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