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首页> 外文会议>Symposium of the International Academy of Astronautics, Oct 2-6, 2000, Rio de Janeiro, Brazil >ACHIEVING COST EFFECTIVE DEBRIS PROTECTION OF UNMANNED SPACECRAFT USING SHIELD
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ACHIEVING COST EFFECTIVE DEBRIS PROTECTION OF UNMANNED SPACECRAFT USING SHIELD

机译：使用SHIELD实现成本效益的垃圾碎片保护

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Proper characterisation of the survivability of an unmanned spacecraft to debris impact must go beyond just a simple assessment of the probability of penetration. Some penetrative damage may be survivable, particularly if critical internal equipment is arranged judiciously. This type of 'indirect' shielding approach represents a potentially cost-effective and complementary approach to the more traditional method of adding 'direct' shielding mass. To quantify the benefits of both strategies, and identify candidate protection solutions for a typical satellite design, is both complicated and time-consuming. As a step towards addressing this problem, a new model called SHIELD has been developed. Competing protection options are evaluated by assessing their probabilities of survival, and rapid convergence on one or more 'good' designs is achieved using a genetic algorithm search method. Results from the model highlight the importance of 'indirect' shielding in improving spacecraft survivability. It is concluded, therefore, that unmanned spacecraft should implement protection according to the principle of 'design for survivability'. Implicit in this statement is the notion that the possibility of a degree of penetrative damage should be tolerated. This is in contrast to the approach adopted for manned spacecraft, where penetration risks must be minimised as far as possible.
机译：正确描述无人航天器对碎片撞击的生存能力，不仅限于对穿透概率的简单评估。某些穿透性损坏可能是可以幸存的，特别是如果关键内部设备的布置合理的话。这种类型的“间接”屏蔽方法代表了一种潜在的具有成本效益的补充方法，是对增加“直接”屏蔽质量的更传统方法的一种补充。量化这两种策略的好处并确定典型卫星设计的候选保护解决方案既复杂又费时。为了解决这个问题，已经开发了一种名为SHIELD的新模型。通过评估竞争性保护方案的生存可能性来评估竞争性保护方案，并使用遗传算法搜索方法在一种或多种“良好”设计上实现快速收敛。该模型的结果突出了“间接”屏蔽在提高航天器生存能力方面的重要性。因此得出结论，无人航天器应按照“生存设计”的原则实施保护。在此声明中隐含的观点是，应容忍一定程度的穿透性损坏。这与载人航天器所采用的方法相反，后者必须将穿透风险降至最低。

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