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首页> 外文期刊>Aerospace and Electronic Systems, IEEE Transactions on >Model for JPALS/SRGPS Flexure and Attitude Error Allocation
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Model for JPALS/SRGPS Flexure and Attitude Error Allocation

机译：JPALS / SRGPS挠度和姿态误差分配模型

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摘要

This paper develops a linearized parametric error model for assessing the effects of structural flexure and attitude uncertainties on the shipboard variant of the joint precision approach and landing system (JPALS). The outputs of the error model are position domain error bounds on the estimate of the ship reference point (SRP) coordinates. The model is parameterized in terms of GPS antenna installation geometry and the covariance matrices capturing the statistics of GPS measurement, ship structural flexure, and ship attitude estimation uncertainty. The performance of the model is evaluated via a set of simulation studies. It is shown that when the attitude errors are small and the flexure statistics well characterized, the error model provides an accurate and convenient way of mapping attitude and flexure uncertainties into SRP position uncertainties. Estimation of SRP position errors is a nonlinear problem and when ship attitude uncertainties are large, the nonlinearities can be important. However, the bounds calculated by the error model developed can be inflated to deal with these nonlinearities. Finally, by analyzing data collected from ship trials, it is shown that perhaps a more challenging issue may be the potential for highly correlated, bias-like structural flexure uncertainties.
机译：本文开发了一种线性化参数误差模型，用于评估结构挠曲和姿态不确定性对联合精确进近和着陆系统（JPALS）的舰载变体的影响。误差模型的输出是船舶参考点（SRP）坐标估计值上的位置域误差范围。该模型根据GPS天线安装几何形状和协方差矩阵进行参数化，该协方差矩阵捕获GPS测量，船舶结构挠度和船舶姿态估计不确定性的统计信息。通过一组模拟研究评估模型的性能。结果表明，当姿态误差较小且挠曲统计特性良好时，误差模型为将姿态和挠度不确定性映射到SRP位置不确定性提供了一种准确，方便的方法。 SRP位置误差的估计是一个非线性问题，当船舶姿态不确定性较大时，非线性可能很重要。但是，可以扩大由误差模型计算出的界限，以处理这些非线性问题。最后，通过对从船舶试验中收集的数据进行分析，结果表明，更具挑战性的问题可能是高度相关的，类似偏差的结构挠曲不确定性。

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