| 摘要 |
FIELD: aircraft engineering.SUBSTANCE: before firing test in gang with solid-propellant rocket engine, nozzle or elastic support hinge defining axial strain of nozzle moving part, are subjected to pressure varying in the range of pressure variation in engine combustion chamber at bench fire test to measure moving part axial yield. Said axial yield is used to define nozzle turn angle caused by said yield. Then, at zero pressure ahead of the nozzle, it is driven from zero angle to maximum angle to measure travel of drive rod, force in drive kinematics and nozzle angle. Measured values are used to define additional change in nozzle turn angle caused by play as drive travel at zero force and actual yield of structural elements as relationship between the difference between design angle for absolutely stiff kinematics and measured angle and measured force. Now, at fire test, obtained results of measurements are used to define nozzle turn angle with due allowance for yield, play and structure compliance.EFFECT: higher accuracy.3 dwg |
