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Optimal Positioning for Advanced Raim

机译:进阶Raim的最佳定位

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摘要

We present a method to improve the integrity error bound in Advanced RAIM by optimizing the position solution and the integrity allocation simultaneously. Since the reduction in the error bound is achieved by degrading the position accuracy under nominal conditions, the method takes into account the accuracy constraint in the optimization. Advanced RAIM may have to consider a larger number of satellites and increased probabilities of fault, so this method is designed to accept a wide variety of threat models (in particular multiple faults). The search of the optimal coefficients is cast as a convex optimization problem with constraints. The solution is obtained iteratively, and the convexity of the problem guarantees a very fast convergence. The algorithm is evaluated by comparing its performance with algorithms where the position solution is not optimized, and showing how it could help achieve worldwide coverage of vertical guidance (LPV-200).
机译:我们提出了一种通过同时优化位置解决方案和完整性分配来改善Advanced RAIM中完整性误差范围的方法。由于通过在标称条件下降低位置精度来实现误差范围的减小,因此该方法在优化中考虑了精度约束。先进的RAIM可能必须考虑更多的卫星和增加的故障概率,因此该方法旨在接受各种威胁模型(尤其是多个故障)。最优系数的搜索被转换为具有约束的凸优化问题。迭代获得解,并且问题的凸性保证了非常快速的收敛。通过将算法的性能与未优化位置解决方案的算法进行比较,评估该算法的性能,并展示该算法如何帮助实现垂直引导(LPV-200)的全球覆盖。

著录项

  • 来源
    《Navigation》 |2013年第4期|279-289|共11页
  • 作者单位

    Stanford University;

    Stanford University;

    Stanford University;

  • 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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