Circuitry for synchronizing the speed of a plurality of engines

Details Circuitry for synchronizing the speed of a plurality of engines Circuitry for synchronizing the speed of a plurality of engines

1991-09-19

1994-03-01

Black, Thomas G.

Boots, shoes, and leggings

36443101, 364565, 416 34, G06F 1548, B63H 300

Patent

active

052914100

ABSTRACT:
A control circuit for synchronizing the speed of a plurality of engines of an aircraft. The control circuit includes first and second counters for counting pulses in a reference pulse train and an engine speed pulse train over a predetermined time interval and third and fourth counters for determining the time between the last pulse of the reference pulse train counted during the predetermined time interval and the end of that time interval and the time between the last pulse of the engine speed pulse train counted during the predetermined time interval. The frequencies of the reference pulse train and speed pulse train in conjunction with inputs from the first, second, third and fourth counters are used to compute an average phase difference between the reference and speed pulse trains over the predetermined time interval. A fuel regulator responsive to a signal representative of the average phase difference controls the flow of fuel to the engines to modify their respective speeds to synchronize the engines' speed with a reference phase corresponding to an independently generated master signal.

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