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Stardust Entry Reconstruction

机译：星尘进入重建

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摘要

An overview of the reconstruction analyses performed for the Stardust capsule entry is described. The results indicate that the actual entry was very close to the preentry predictions. The capsule landed 8.1 km north-northwest of the desired target at the Utah Test and Training Range. Analyses of infrared video footage and radar range data (obtained from tracking stations) during the descent show that the drogue parachute deployment was 4.8 s later than the preentry prediction, whereas the main parachute deployment was 19.3 s earlier than the preset tuner, indicating that the main deployment was actually triggered by the backup baroswitch. Reconstruction of a best estimated trajectory revealed that the aerodynamic drag experienced by the capsule during hypersonic flight was within 1 % of preentry predictions. Observations of the heatshield support the preentry estimates of small hypersonic angles of attack, because there was very little, if any, charring of the shoulder region or the aftbody. Through this investigation, an overall assertion can be made that all the data gathered from the Stardust capsule entry were consistent with flight performance close to nominal preentry predictions. Consequently, the design principles and methodologies used for the flight dynamics, aerodynamics, and aerothermodynamics analyses have been corroborated.
机译：描述了为星尘胶囊进入所进行的重建分析的概述。结果表明，实际进入非常接近进入前的预测。太空舱降落在犹他州测试与训练场的目标目标西北西北8.1公里处。对下降过程中从跟踪站获得的红外录像和雷达测距数据的分析表明，伞形降落伞的部署比进入前的预测晚了4.8 s，而主降落伞的部署比预设的调谐器要早19.3 s，表明主要部署实际上是由备份baroswitch触发的。最佳估计轨迹的重建表明，在高超音速飞行过程中，胶囊经历的空气动力学阻力在进入前预测的1％以内。隔热板的观测结果支持了高超声速小迎角的进入前估计，因为肩部区域或后部机身几乎没有炭化，如果有的话。通过这项调查，可以断言从星尘号太空舱入口收集的所有数据均与接近名义飞行前预测的飞行性能一致。因此，已经证实了用于飞行动力学，空气动力学和空气热力学分析的设计原理和方法论。

著录项

  • 来源
    《Journal of Spacecraft and Rockets》 |2010年第5期|p.736-740|共5页
  • 作者

    Prasun N. Desai; Garry D. Quails;

  • 作者单位

    NASA Langley Research Center, Hampton, Virginia 23681-2199 Atmospheric Flight and Entry Systems Branch, 1 North Dryden Street, Mail Stop 489;

    rnNASA Langley Research Center, Hampton, Virginia 23681-2199 Advanced Engineering Environments Branch, 1 North Dryden Street, Mail Stop 458;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    h: altitude; M: Mach number; t: time;

    机译：h：海拔;M：马赫数;t：时间;

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