电磁弹射微重力装置的仿真分析

SIMULATION AND ANALYSIS FOR THE MICROGRAVITY EXPERIMENT FACILITY BY ELECTROMAGNETIC LAUNCH

  • 摘要: 电磁弹射微重力实验装置是地基微重力模拟技术的前沿研究方向,此类装置的主要问题是弹射过程中电机、结构、气动力等引起的振动和噪声,影响实验舱的微重力水平。本文针对该装置的功能和指标需求,进行了运动规划和动力学建模,研究了实验舱在电磁推力、轨道不平顺、气动噪声等综合激扰下的振动响应,通过仿真分析,评估内舱可以达到4 s微重力时间和10−5g的微重力水平。该工作为电磁弹射微重力装置的设计提供了理论依据。

     

    Abstract: Microgravity experiment facility by electromagnetic launch is the frontier in the area of the ground-based microgravity simulation, but its challenge is the problem of vibration and noise caused by the motor thrust, mechanical structure irregularity and aerodynamics, which affects the microgravity level of experiment cabin. Base on the mechanics of a microgravity drop tower, we analyze the motion kinematics and dynamics, and study the vibration response of the cabin caused by the combined effects of motor thrust, rail irregularity, and aerodynamic noise. By using simulations on aerodynamics, vibration and acoustics, we get the estimated results of microgravity level of the experiment cabin. The microgravity time is about 4 seconds and the microgravity level is 10−5g for the inside-cabin. This work provides the theoretical analysis for the microgravity facility design and performance assessment.

     

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