METHOD OF IDENTIFICATION OF ARBITRARY TIME OF COMBUSTION OF CRYOGENIC STAGE MASS Russian patent published in 2003 - IPC

FIELD: space engineering; on-board terminal control units of cryogenic stages provided with non-adjustable cruise engines. SUBSTANCE: proposed method includes measuring phantom acceleration signal at discrete moments of time, inverting this signal and multiplying it by signal proportional to specific impulse of cruise engine thrust. Magnitudes of signals are stored, integrated and added to sum of measurements of arbitrary acceleration time. Arbitrary time of combustion of cryogenic stage mass is calculated by dividing the sum by number of measurements. Measured magnitudes are presented in form of sequence at measured intervals for each maneuver of cryogenic stage. Magnitudes obtained at the end of each measured interval are selected from sequence of calculated magnitudes. Average magnitude of selected values and initial magnitude is considered to be arbitrary time of combustion This time is set for first maneuver and is assumed to be equal to difference between its calculated magnitude and time of its identification at previous maneuver for subsequent maneuvers. Proposed method minimizes effect of spread of rocket engine characteristics on process of control. EFFECT: enhanced accuracy of calculation of cruise engine cut-off time. 2 dwg