目标飞行不变量和方位支援的仰角参数估计方法

The Method of Elevation Parameter Estimation Supported by Bearing-only Measurement of Target Flight Invariants

针对单站观测系统的目标角度跟踪问题,提出了一种基于单站目标飞行平面的二面角不变量和方位序列支援的仰角参数估计方法。根据推导出的二面角关系,利用纯方位序列计算出目标在平面上投影的航向角,可方便地解出目标运动平面的水平补角和二面角,最后给出目标仰角序列的预测公式并分析了方位噪声对仰角误差的影响。该方法较好地解决了单站纯角度观测的非线性问题。仿真实验表明:估计的目标运动的不变参数效果好,仰角预测序列精度高。

Aim at the problem of bearing-only target tracking of mono-station measurement,a new elevation parameter estimation algorithm is proposed which is based on invariable-information of mono-station flight plane and information supported by bearing-only measurement.According to the deduced dihedral angle relation,horizontal supplementary angle and dihedral angle can be easily solved and forecasting formula of target elevation series is given by utilizing target projection course angle calculated by bearing-only series.Finally,an analysis of impact of azimuth noise on elevation error is done.The use of this method preferably solves the problem of nonlinearity of mono-station measurement and the simulation experiment shows that the estimation of invariable parameter of target movement is good in effect and the elevation prediction series are of good accuracy and precision