基于高程异常补偿的飞机终端区组合导航高度优化算法

doi:10.12305/j.issn.1001-506X.2021.09.30

摘要/Abstract

摘要：

大型机场终端区飞机的进近着陆通常利用仪表着陆系统(instrument landing system, ILS), 但由于价格及环境条件等原因, 部分机场没有配备ILS。针对未配备ILS的机场终端区, 提出一种基于误差判断因子, 结合高程异常补偿算法, 利用大气数据系统(air data system, ADS), 捷联式惯性导航系统(strapdown inertial navigation system, SINS)和北斗导航系统(beidou navigation system, BDS)组合进行高度计算的优化算法, 提高飞机进近过程中高度定位的精度。通过结合机场终端区高程异常, 建立新的Kalman滤波高度量测方程, 对组合导航系统高度定位算法进行优化与仿真。仿真结果表明, 通过终端区高程异常补偿, 可以降低BDS高度误差, 抑制SINS误差发散, 在飞机受静压源误差影响的情况下, 组合后的高度定位误差相对于单系统高度定位的误差可降低41.52%, 高度定位精度改善较好。

关键词: 高程异常, 组合导航, Kalman滤波, 进近着陆, 静压源误差

Abstract:

The instrument landing system (ILS) is used for aircraft approaching and landing in the terminal area of most large airports. However, due to price and usage environment, some airports are not equipped with ILS. Aiming at the airport terminal area not equipped with ILS, a method of using the error judgment factor is proposed. Combined with the height anomaly compensation algorithm, the combination of the air data system (ADS), strapdown inertial navigation system (SINS) and Beidou navigation system (BDS) are used to optimize the altitude calculation algorithm for improving the height accuracy during aircraft approaching. A new Kalman filter altitude measurement equation is established by combining the elevation anomalies in the airport terminal area to optimize and simulate the altitude positioning algorithm of the integrated navigation system. The simulation results show that the algorithm not only reduces the BDS height error significantly through the height anomaly compensation in the terminal area, but also suppresses the divergence of the SINS error. The error of height positioning after combination affected by the static pressure source error can reduce 41.52% compared with the single system. The algorithm improves the high positioning accuracy.

Key words: height anomaly, integrated navigation, Kalman filter, approaching and landing, static pressure source error

中图分类号:

TP202.7

孙淑光, 温启新. 基于高程异常补偿的飞机终端区组合导航高度优化算法[J]. 系统工程与电子技术, 2021, 43(9): 2612-2619.

Shuguang SUN, Qixin WEN. Aircraft height optimization algorithm of integrated navigation in terminal area based on height anomaly compensation[J]. Systems Engineering and Electronics, 2021, 43(9): 2612-2619.

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仿真条件设置	具体参数
仿真时间/s	120
滤波周期/s	1
陀螺仪常值漂移/(°/h)	0.2
陀螺仪随机噪声/(°/h)	N(0, 0.02)
加速度计常值漂移/g	1×10^-3
加速度计常值漂移/g	N(0, 1×10^-5)
BDS测量伪距误差/m	N(10, 5)
ADS测量气压误差/Pa	N(0, 50)

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