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首页> 外文会议>6th European Conference on Space Debris >ACTIVE DEBRIS REMOVAL SYSTEM BASED ON POLYURETHANE FOAM
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ACTIVE DEBRIS REMOVAL SYSTEM BASED ON POLYURETHANE FOAM

机译：基于聚氨酯泡沫的主动除尘系统

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Space debris is an increasing problem. The exponentialrnincrease of satellite launches in the last 50 years hasrndetermined the problem of space debris especially inrnLEO. The remains of past missions are dangerous forrnboth operative satellites and human activity in space.rnBut not only: it has been shown that uncontrolledrnimpacts between space objects can lead to a potentiallyrndangerous situation for civil people on Earth.rnIt is possible to reach a situation of instability where thernbig amount of debris could cause a cascade of collisions,rnthe so called Kessler syndrome, resulting in therninfeasibility of new space missions for manyrngenerations. Currently new technologies for thernmitigation of space debris are under study: for whatrnconcerning the removal of debris the use of laser to giverna little impulse to the object and push it in a graveyardrnorbit or to be destroyed in the atmosphere. Anotherrnsolution is the use of a satellite to rendezvous with thernspace junk and then use a net to capture it and destroy itrnin the reentry phase. In a parallel way the research isrnaddressed to the study of deorbiting solutions to preventrnthe formation of new space junk. The project presentedrnin this paper faces the problem of how to deorbit anrnexisting debris, applying the studies about the use ofrnpolyurethane foam developed by Space Robotic Grouprnof University of Bologna. The research is started withrnthe Redemption experiment part of last ESA Rexusrnprogram. The foam is composed by two liquidrncomponents that, once properly mixed, trig an expansivernreaction leading to an increase of volume whose entityrndepends on the chemical composition of the two startingrncomponents. It is possible to perform two kind ofrnmission:rn1) Not controlled removal: the two components arerndesigned to react producing a low density, highrnexpanded, spongy foam that incorporates the debris. ThernA/m ratio of the debris is increased and in this way alsornthe ballistic parameter. As a consequence, the effect ofrnatmospheric drag increases and the orbit life time isrnreduced.rn2) Controlled removal: the reaction of the tworncomponents leads to a high density, medium expanded,rnrigid foam. The idea is to create a link between thernsatellite and the object: in this case the deorbit isrnperformed by the cleaner satellite propulsion, in arnsmaller time compared to the first configuration.rnSeveral tests and designs are in implemented to achievernthe goals of the research.
机译：空间碎片是一个日益严重的问题。在过去的50年中，卫星发射的指数级增长已经确定了空间碎片的问题，尤其是inleLEO。过去的任务的残骸是危险的可操作卫星和在太空中的人类活动。rn不仅如此：已经证明，空间物体之间不受控制的撞击会导致地球上的平民面临潜在的危险状况。rn可能会出现不稳定状况所谓的凯斯勒综合症（Kessler syndrome）是指大量的碎片可能导致一系列碰撞的地方，从而导致新的太空任务对许多代人来说是不可行的。目前，正在研究减轻空间碎片的新技术：对于清除碎片的问题，使用激光对物体施加很少的脉冲，并将其推入坟墓轨道，或在大气中销毁。另一个解决方案是使用卫星与太空垃圾会合，然后在重入阶段使用网捕获并摧毁它。同时，该研究也指向去轨解决方案的研究，以防止新的太空垃圾的形成。本文所提出的项目面临着如何利用博洛尼亚航天机器人集团（Space Robotic Grouprnof University）所开发的聚氨酯泡沫的使用研究来消除已存在的碎片的轨道问题。该研究从最后一个ESA Rexusrn计划的赎回实验部分开始。泡沫由两种液体成分组成，一旦适当混合，它们就会引发膨胀反应，导致体积增加，其体积取决于两种起始成分的化学组成。可能执行两种排放：rn1）不受控制的清除：这两种成分经过设计可发生反应，从而产生低密度，高膨胀的海绵状泡沫，其中混入了碎屑。碎片的rnA / m比增加，这样弹道参数也增加。结果，增加了大气阻力的作用，减少了轨道寿命。2）控制清除：这两种组分的反应产生了高密度，中等膨胀的刚性泡沫。这个想法是要在卫星和天体之间建立联系：在这种情况下，与更干净的卫星推进相比，脱轨是在比第一种配置更短的时间内完成的。为实现研究目的，已进行了多次测试和设计。

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