首页> 外文期刊>Journal of Spacecraft and Rockets >Analysis and Design of Aerocapture Tether with Accounting for Stochastic Errors
【24h】

Analysis and Design of Aerocapture Tether with Accounting for Stochastic Errors

机译:考虑随机误差的航空捕捉系绳分析与设计

获取原文
获取原文并翻译 | 示例
       

摘要

As an alternative to conventional aerocapture spacecraft, a system comprising two vehicles (a probe and an orbiter) connected by a long thin tether has been proposed. In this tethered system, the probe provides the necessary atmospheric drag while the orbiter remains high above the sensible atmosphere. The results of a sensitivity analysis of the aerocapture tether are presented. Errors in knowledge of the atmosphere and in control of the initial conditions are considered. A result of the analysis is the discovery that the tethered system possesses a self-correcting mechanism that partially compensates for these errors. This intrinsic characteristic can be enhanced with a simple guidance algorithm that implements a change in the tether length to minimize the effect of off-nominal conditions. Design rules are developed to accommodate stochastic errors without violating the constraints, i.e., breaking or compressing the tether, subjecting the orbiter to atmospheric effects, crashing, or failing to capture. The final design consists of a 68-km tether with a mass of 381 kg and a probe and orbiter of 1000 kg each. It is capable of achieving a 99% success rate for aerocapture at Mars.
机译:作为常规航空航天器的替代方案,已经提出了一种系统,该系统包括通过一条细长的细绳连接的两辆飞行器(一个探测器和一个轨道飞行器)。在这种系留系统中,探测器提供必要的大气阻力,而轨道飞行器仍保持在高于感知大气的高度。给出了航空抓绳的灵敏度分析结果。考虑大气知识和初始条件控制方面的错误。分析的结果是发现,系留系统具有一种自校正机制,可以部分补偿这些错误。可以通过简单的引导算法来增强此内在特性,该算法可以实现系链长度的变化,以最大程度地减少偏离名义条件的影响。设计规则的制定是为了适应随机误差而不会违反约束条件,即打破或压缩系绳,使轨道飞行器受到大气影响,坠毁或无法捕获。最终设计包括一条68公里长的绳索,质量为381公斤,每个探测器和轨道飞行器为1000公斤。它能够在火星上实现99%的航空捕获成功率。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号