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Implementation and Experimental Validation of Cycle Ambiguity Resolution with Position Domain Integrity Risk Constraints

机译:具有位置域完整性风险约束的周期歧义解决方案的实现与实验验证

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摘要

Cycle ambiguity resolution in applications that require both high accuracy and high integrity is challenging. This paper describes new results, implementation details, and experimental validation for the Enforced Position-domain Integrity-risk Cycle resolution algorithm (EPIC). EPIC computes tight bounds on the integrity risk of cycle resolution by evaluating the impact of incorrect fixes in the position domain. Although the fundamentals of EPIC were mathematically formulated in previous work, EPIC was limited to simple snapshot-fixing systems (using least squares estimation). In this paper, EPIC's capabilities are expanded to more general applications that include Kalman filtering in the position estimation process. Practical implementation issues, such as using partially-fixed ambiguity vectors in the filter, dealing with satellite geometry changes and cycle slips, re-fixing the re-acquired satellites without jeopardizing integrity, and sensitivity analysis are thoroughly addressed. Finally, experimental validation is provided and the results are compared with other methods for integrity-constrained cycle resolution.
机译:在要求高精度和高完整性的应用中,周期模糊度的解决是具有挑战性的。本文介绍了强制位置域完整性风险循环解析算法(EPIC)的新结果,实现细节和实验验证。 EPIC通过评估位置域中错误定位的影响来计算出循环分辨率完整性风险的严格界限。尽管EPIC的基本原理是在先前的工作中用数学公式表述的,但EPIC仅限于简单的快照固定系统(使用最小二乘估计)。在本文中,EPIC的功能已扩展到更广泛的应用,包括位置估计过程中的卡尔曼滤波。彻底解决了实际的实现问题,例如在滤波器中使用部分固定的模糊度矢量,处理卫星几何形状变化和周跳,在不损害完整性的情况下重新固定重新获取的卫星以及灵敏度分析。最后,提供了实验验证,并将结果与​​完整性受限的循环分辨率的其他方法进行了比较。

著录项

  • 来源
    《Navigation》 |2011年第1期|p.45-58|共14页
  • 作者

    SAMER KHANAFSEH; STEVEN LANGEL;

  • 作者单位

    Illinois Institute of Technology, Chicago, IL 60616;

    Illinois Institute of Technology, Chicago, IL 60616;

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

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