METHOD OF CONTROL OF LIQUID-PROPELLANT ROCKET ENGINE AND DEVICE FOR REALIZATION OF THIS METHOD Russian patent published in 1997 - IPC

FIELD: rocketry and space engineering; control of thrust and ratio of propellant components of liquid-propellant rocket engines of closed circuit. SUBSTANCE: method includes measurement of mass flow rates of oxidizer and fuel at one firing test of engine conducted on test stand for check of its serviceability after assembly; one adjusting member of engine is reset between two first measurements at angle selected before-hand; its second adjusting member is reset between second and third measurements at angle selected beforehand. According to the results of propellant components due to turn of each adjusting member of engine through unit angle are calculated. These coefficients are used for calculating the correction of thrust regulator and throttle governor for ratio of propellant components at all subsequent starts of engine. Device for realization of this method at first (adjusting) test includes program unit 20, two turbine flow rate converters 18 and 19 mounted in engine oxidizer and fuel supply lines, oxidizer and fuel temperature sensors 16 and 17, two frequency-to-code converters 22 and 23, two temperature measuring units 24 and 25, oxidizer and fuel mass flow rate computer 26, two control command formers 36 and 37, two drives 8 and 13 whose outputs are connected with inputs of adjusting members 7 and 12 of engine 1, number dividing unit 27, number adder 28, read- only memory unit 31, two comparison units 29 and 30, gain factor computer 32, correction angle computer 33, recorder 38 and two code adders 34 and 35. Before subsequent starts of engine, the following components are excluded from operation: measuring part of device together with oxidizer and fuel mass flow rate computer 26, number dividing unit 27, number adder 28, comparison units 29 and 30, read-only memory unit 31, gain factor computer 32 and recorder 38; reprogrammed memory unit 39 and error signal computer 40 are additionally used. EFFECT: enhanced efficiency. 7 cl, 13 dwg, 1 tbl