Design And Analysis Of Ultra-light Inflatable Self-shape-maintenance Drag Balloon

In order to prevent and eliminate space debris,this paper has carried out research on ultralight inflatable self-shape-maintenance drag balloon deorbit technology.Aiming at the urgent deorbit demand of low earth orbit,a design scheme of the inflatable balloon deorbit device with omnidirectional increasing resistance,high-efficiency deorbit efficiency and self-maintenance resistance area is proposed.Firstly,aiming at the atmospheric perturbation environment of low earth orbit,the calculation model of space debris deorbit is established.By using STK software to simulate the high-precision orbit prediction of low earth orbit space debris,the derailment time and orbital height of space debris are studied.The relationship between the area-mass ratio and the start date of the deorbit.And by analyzing the maximum atmospheric perturbation resistance of the drag balloon at the limit height,it provides a reference for the following design of the inflatable drag balloon.Secondly,the core of the inflatable drag balloon deorbit device is an ultra-thin film sphere that can be used for a long time in the low earth orbit space environment,relying on a spherical structure to provide omnidirectional resistance.By comparing and analyzing the influence of the low earth orbit space environment on various alternative thin film materials,a 12.5?m Kapton film was selected as the spherical material.With reference to the newly designed NABEO 2.5m~2 drag sail of HPS,the equivalent design of the 1.8m drag balloon is proposed.A standard modular folding scheme was proposed.The folding efficiency of the folding scheme was obtained through experiments and the standard module folding prototype of the drag balloon is fabricated.In order to verify the easy-to-expand and stability of the drag balloon folding scheme,three controlled balloon expansion schemes are designed.In the closed experiment box,three kinds of schemes were carried out,and the balloon could be smoothly developed according to the designed controlled deployment scheme,which provided guarantee for the function realization of the drag balloon deorbit device.Finally,the drag balloon cannot rely on gas to maintain shape during long-term deorbit.Therefore,its ultra-light large-area film needs to adopt appropriate dimensional reinforcement to enhance the rigidity of the spherical structure and maintain the resistance area.According to the obtained atmospheric perturbation resistance of the drag balloon at the limit height,combined with the structure characteristics and folding scheme of the drag balloon,two self-shape-maintenance reinforcement schemes of joint reinforcement and local discontinuous reinforcement are designed to enhance the sphere structure.Through the micro-compression experiment and finite element simulation analysis,the enhancement effect of the self-shape-maintenance reinforcement scheme is obtained.It enhances the resistance area maintenance ability of the inflatable drag balloon deorbit device in the long-term deorbit process of low earth orbit,and effectively supports the realization of the deorbit function of the drag balloon.The ultra-light inflatable self-shape-maintenance drag balloon deorbit device can provide omnidirectional resistance increase capability,does not consume satellite fuel,has simple structure,light weight and small volume,and high deorbit efficiency,and provides for the prevention and removal of space debris in low earth orbit.New technical means have broad application prospects.