| 基于最小一乘的跑道入口高度计算 |
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| 引用本文： | 焦瑞芳,史晓锋,杨玉洁.基于最小一乘的跑道入口高度计算[J].航空计算技术,2011,41(3):31-33. |
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| 作者姓名： | 焦瑞芳 史晓锋 杨玉洁 |
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| 作者单位： | 北京航空航天大学,电子信息工程学院,北京,100191 |
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| 基金项目： | 国家863高科技研究发展计划项目资助 |
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| 摘 要： | 跑道入口高度是关系着飞机能否安全着陆的关键参数,在其计算中需要采用曲线拟合预测的方法。目前大多是采用基于最小二乘准则的拟合方式。由于最小二乘准则的局限性,当下滑道随机误差不满足正态分布,在飞行数据中出现异常点时会给预测带来较大误差。将最小一乘方法引入到跑道入口高度计算问题中,提高了算法的稳健性,很好地克服了这一问题。
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| 关 键 词： | 线性回归 最小一乘 飞行校验 跑道入口高度 参考入口高度 |
Reference Datum Height Computation Based on Least Absolute Deviation |
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| JIAO Rui-fang,SHI Xiao-feng,YANG Yu-jie.Reference Datum Height Computation Based on Least Absolute Deviation[J].Aeronautical Computer Technique,2011,41(3):31-33. |
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| Authors: | JIAO Rui-fang SHI Xiao-feng YANG Yu-jie |
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| Institution: | (School of Electronic Information Engineering,Beihang University,Beijing 100191,China) |
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| Abstract: | The reference datum height（RDH） is one of key parameters for plans landing safely.A linear regression method is used to predict the RDH.At present,the least squares criterion is widely used.Since glide scope structural effects is not always Gaussian,this method is not suitable due to limitations of the least-square criterion,and the computation of RDH could be greatly affected by some outliers.However,the least absolute deviation criterion is much less sensitive to the outliers.The least absolute deviation criterion shows more robustness and the method based on it is more suitable to compute the RDH. |
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| Keywords: | linear regression least absolute deviation flight inspection threshold crossing height reference datum height |
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