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Real-time navigation for Mars final approach using the Mars Network.

机译：使用火星网络对火星最终方法进行实时导航。

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摘要

Real-time navigation during the final approach phase of an interplanetary mission can significantly increase the accuracy of aerocapture and pinpoint landing. The Mars Network is a versatile telecommunications network that is ideally situated to provide spacecraft-to-spacecraft radiometric navigation during Mars final approach and entry, descent, and landing via the Electra UHF transceiver, which is capable of providing autonomous, on-orbit, real-time trajectory determination using two-way Doppler measurements between a Mars approach vehicle and a Mars Network orbiter.; A detailed dynamic analysis and link analysis of the final approach problem is presented, which seeks to determine the expected operating conditions of the Electra transceiver. In particular, the maximum Doppler shift and Doppler rate, which determine the transceiver tracking loop requirements, and the total received signal power and signal-to-noise ratio, which determine the range at which the communications link can be closed, are investigated for a range of Mars Network orbital geometries. A model of the Electra signal is developed on the basis of the results of the dynamic analysis and link analysis and is used as input to a high-fidelity simulation of the Electra transceiver. A Monte Carlo analysis is performed to determine the performance of the Electra transceiver for a range of signal and tracking loop parameters. In particular, the performance analysis focuses on the maximum range at which the link can be closed and on the acquisition and tracking performance of the second-order tracking loop.; The analysis of the tracking performance is used to characterize and model the error in the Doppler measurement of the Electra transceiver. The error model is incorporated into the design of an extended Kalman filter, in order to improve the fidelity of the navigation filter design. The information content in the Doppler measurement and the observability of the estimated states are investigated for various orbital geometries and the accuracy of the navigation solution is analyzed.
机译：在星际任务的最后进场阶段，实时导航可以显着提高航空捕获和精确着陆的准确性。火星网络是一种多功能的电信网络，其地理位置优越，可在火星最终进场以及通过Electra UHF收发器进入，下降和着陆期间提供航天器到航天器的辐射导航，能够提供自主的，在轨的，真实的在火星进近飞行器与火星网络轨道器之间使用双向多普勒测量进行时间轨迹确定；给出了最终方法问题的详细动态分析和链接分析，旨在确定Electra收发器的预期工作条件。特别是，研究了确定收发器跟踪环路要求的最大多普勒频移和多普勒速率，以及确定了可以关闭通信链路的范围的总接收信号功率和信噪比。火星网络轨道几何形状的范围。基于动态分析和链路分析的结果，开发了Electra信号模型，并将其用作Electra收发器的高保真仿真的输入。执行蒙特卡洛分析，以确定一系列信号和跟踪环路参数的Electra收发器的性能。尤其是，性能分析的重点是链路可以关闭的最大范围，以及二阶跟踪环路的获取和跟踪性能。跟踪性能的分析用于表征和建模Electra收发器的多普勒测量中的误差。误差模型被合并到扩展卡尔曼滤波器的设计中，以提高导航滤波器设计的保真度。对于各种轨道几何形状，研究了多普勒测量中的信息内容和估计状态的可观察性，并分析了导航解决方案的准确性。

著录项

  • 作者

    Mogensen, Andreas Enevold.;

  • 作者单位

    The University of Texas at Austin.$bDepartment of Aerospace Engineering and Engineering Mechanics.;

  • 授予单位 The University of Texas at Austin.$bDepartment of Aerospace Engineering and Engineering Mechanics.;
  • 学科 Engineering Aerospace.
  • 学位 Ph.D.
  • 年度 2007
  • 页码 219 p.
  • 总页数 219
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 航空、航天技术的研究与探索;
  • 关键词

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