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首页> 外文会议>7th Spacecraft Charging Technology Conference 2001: a Spacecraft Charging Odyssey, Apr 23-27, 2001, Noordwijk, the Netherlands >THE DESCRIPTION OF DYNAMIC SPACECRAFT CHARGING USING MODERN COMPUTER TOOLS
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THE DESCRIPTION OF DYNAMIC SPACECRAFT CHARGING USING MODERN COMPUTER TOOLS

机译：现代计算机工具对动态手工艺品充电的描述

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The peculiarity of spacecraft charging dynamic processes on GEO is determined by the mechanism of suppression of an secondary electron emission by a retarding electrical field and sharply differing timescales of charging processes, including fast change of external conditions (plasma, sunlight, spacecraft orientation). For numerical simulation of development of spacecraft charging processes in time the automatic multistep Gear method specially intended for the decision of "stiff systems of the ordinal differential equations is used in this work. The increase of performance modern PC has allowed to use this method for spacecraft models with number of elements more than 1000. The tests show high stability and accuracy of the used methods even at influence of spacecraft model sampling degree. This algorithm is realized in the new version of spacecraft charging tool "Coulomb", constructed as the WWW client - server. The tools includes the interactive builder of spacecraft models and 3D display system of the information and results of accounts, material properties and space plasma parameter databases, tools for solution of electrostatic and dynamic problems, and scenario manager tool. The tool use HTML browsers with VRML by plug-in, WWW Apache server with PHP and mySQL extensions, which allows using it in local and remote access mode. The described technique is applied to the of spacecraft charging analysis on a GEO and HEO under various conditions: in the eclipse and in the sunlight, slow or fast rotation spacecraft in sunlight, movement of a shadow on a surface spacecraft, and also at time variation of plasma parameters. The results of spacecraft charging calculation are presented.
机译：地球静止轨道上航天器充电动态过程的特殊性是由抑制电场抑制二次电子发射的机制和充电过程的时间尺度急剧变化（包括外部条件（等离子体，阳光，航天器方向）的快速变化）来确定的。为了及时地对航天器充电过程的发展进行数值模拟，这项工作中使用了专门用于决定“有序微分方程的刚性系统”的自动多步齿轮法。现代PC的性能提高使得该方法可以用于航天器元素数量大于1000的模型，测试表明即使在航天器模型采样程度的影响下，所使用方法的稳定性和准确性也很高，该算法是在构造为WWW客户端的新版本航天器充电工具“库仑”中实现的-服务器：该工具包括交互式的航天器模型构建器以及帐户信息和结果的3D显示系统，材料属性和空间等离子参数数据库，用于解决静电和动态问题的工具以及方案管理器工具。带有VRML插件的浏览器，带有PHP和mySQL扩展名的WWW Apache服务器，允许在本地和远程访问模式。所描述的技术适用于在各种条件下在GEO和HEO上进行的航天器荷电分析：在日食和日光下，日光下缓慢或快速旋转的航天器，地表航天器上阴影的移动，以及随时间变化的情况血浆参数。介绍了航天器充电计算的结果。

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