METHOD OF AND SYSTEM TO CONTROL OPERATING MECHANISM OF GAS-TURBINE ENGINE FUEL METER Russian patent published in 2006 - IPC F02C9/28 

FIELD: mechanical engineering; gas-turbine engines.

SUBSTANCE: group of inventions relates to automatic control of power plants and can be used for automatic control of fuel delivery in gas-turbine engine. Proposed method to control, operating mechanism of gas-turbine engine fuel includes forming of control signal, meter operating mechanism position signal, comparing these two signals and receiving error signal which acts onto fuel meter operating mechanism control element, two different threshold values of error signal differing in values being set, and error signal being compared with threshold values. If error signal exceeds higher threshold, it is delivered to meter operating mechanism control element which shifts meter operating element to decrease error signal, and if error signal is less than higher threshold, its value is integrated and compared with minimum threshold value and, if it exceeds said value, but is less than higher threshold value, single pulse is supplied to operating mechanism control element and said control element executes single displacement in direction determined by integral sign, shifting meter operating control mechanism in direction to decrease error signal. Proposed control system of gas-turbine engine fuel meter operating mechanism contains operating mechanism control signal setter, fuel meter position pickup and comparison element whose first input is connected with output of setter, and second input, with position pickup, and integrator whose first input is connected with output of comparison element. System is furnished with controlled generator, selector switch, two comparator, switching direction setter and univibrator. First input of selector switch is connected with output of controlled generator connected with output of comparison element, second input of selector switch is connected with output of first comparator whose input is connected with output of comparison element, third input of selector switch is connected through univibrator with output of second comparator whose input is connected with output of integrator whose second input is connected with output of second comparator. Output of selector switch is connected with first input of switch, second input of which is connected with output of switching direction setter, first input of which is connected with output of comparison element and second one, with output of integrator.

EFFECT: improved accuracy of control owing to reduction of dead zone of control system.

3 cl, 1 dwg