Rocket engine nozzle swing simulation analysis method and system

Abstract

The invention provides a rocket engine nozzle swing simulation analysis method and system. The rocket engine nozzle swing simulation analysis method comprises the following steps: establishing a parameterized nozzle swing geometric three-dimensional constraint simulation model; setting driving parameters in the parameterized nozzle swing geometry three-dimensional constraint simulation model; according to the set driving parameters, conducting sensitivity analysis on the actuator, and generating a stroke curve and data of the actuator in the swing process of the spray pipe. According to the rocket engine nozzle swing simulation analysis method, a parameterized nozzle swing geometry three-dimensional constraint simulation model is established, and actuator stroke curve data is directly generated during nozzle design and used for verifying a rocket flight control algorithm.

Description

technical field [0001] The present application relates to the field of rocket technology, in particular to a simulation analysis method and system for nozzle swing of a rocket engine. Background technique [0002] In rocket engine oscillating nozzle, when the center of oscillating nozzle and the upper fulcrum coincide with the plane perpendicular to the engine axis, two servo actuators at 90 degrees to each other will oscillate without involvement when the nozzle oscillates. When the pivot center of the nozzle and the plane perpendicular to the engine axis of the upper fulcrum do not coincide, the two actuators at 90 degrees to each other form a geometric constraint when the nozzle swings, thus causing the dragged swing of the nozzle. The existing rocket engine Nozzle swing analysis methods include the following two methods: [0003] First, establish the analysis method of the constraint equation. First, establish the assumptions: (1) the nozzle cannot be twisted; (2) the d...

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Problems solved by technology

The disadvantages of this method are: the workload is large when calculating point by point, and the method of solving constraint equations by programming requires high programming ability of designers

[0004] Second, establish a motion simulation method, establish a motion simulation analysis in the 3D motion simulation software, use a spherical joint to replace the joint bearing of the nozzle swing center and the servo actuator, and replace the elongation and shortening of the servo actuator with a translational hinge , arranging the dynamic measurement features to get the stroke curves of the two servo actuators. The defect of this method is that the spherical joint constraint is established when the nozzle swings in the full axis, but the spherical joint constraint cannot solve the problem that the nozzle cannot be twisted during the swing process. question

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