Research On The Simulation System Design Of A Rocket

Fueling process before the carrier rocket launch requires high security and reliability. As an independent system for the docking, fueling and shedding experiments of fueling system, the rocket motion simulation system provides an experimental docking platform for the connector. And it has important theoretical and practical significance for the research of fuel filling system of carrier rocket.Firstly the paper studied the law of the rocket body space motion before launching and completed the design index conversion. Then it analyzed and evaluated the features of series, parallel mechanism and hybrid institutions, and proposed a hybrid mechanism which had five degrees of freedom as the actuating mechanism program for the motion simulation system. An idea of "industrial PC+ motion control card" for the overall control was also put forward. And the paper finished the specific physical design and selection and check of main components for the rocket motion simulation system.Secondly the thesis carried out the kinematics analysis of the parallel section of the hybrid motion simulation system, and calculated its freedom based on screw theory. Through coordinate transformation method it obtained the inversed position kinematics, and further made the velocity and acceleration analysis for the mechanism. Then it acquired forward position kinematics by Newton iteration algorithm. By using MATLAB software, the paper made some examples of verification for the forward kinematics, inversed kinematics, velocity analysis and acceleration analysis.Finally, based on Lagrange equation the dynamic model of parallel mechanism was established, also the driving force and the pose of terminal actuator were obtained. It further made dynamic simulations of lateral and longitudinal swinging movement for the rocket motion simulation system. More it acquired the driving force, velocity, and power of driven joint. Considering the impact of mechanism faying surfaces on the systematic dynamical performance, it made systematic modal and harmonic response analysis, and more acquired the vibration parameters of the system through finite element techniques.