风场扰动的相干激光探测建模仿真研究

Modeling and simulation of coherent laser detection of the wind field disturbance

为了实时掌握机场上空的风场及扰动情况信息,保障航空飞行安全,提出一种运用相干激光探测风场扰动的方法。在解算背景风场矢量速度模型的基础之上,建立解算风场扰动矢量速度的模型。基于相干激光回波信号的径向速度仿真,为解算风场扰动矢量速度提供可靠有效的径向风速数据。在噪声干扰情况下,采用阻尼最小二乘算法解算风场扰动矢量速度,并对比分析在不同扫描方位角间隔下解算得到的风场扰动矢量速度。仿真结果表明,扫描方位角间隔越小解算结果误差越小,当扫描方位间隔小于60°时,风场速度扰动量均方误差(MSE)小于1 m/s,水平方向扰动量小于4°。

In order to obtain the information of wind field and disturbance in the airport in real time,and to ensure the safety of flight,this paper establishes a model to calculate the velocity of the wind field disturbance vect or.Based on the radial velocity simulation of coherent laser echo signal,reliable and effective radi al velocity data can be provided for calculating the vector velocity of the wind field disturbance.In the case o f noise interference,the damping least square algorithm is used to calculate the vector velocity of the w ind field disturbance,and the vector velocity of the wind field disturbance is compared and analyzed under different scanning azimuth intervals.The simulation results show that the scan azimuth interval is smaller,and the errors of calculating results are smaller,too.When the scanning range interval is less than 60°,the mean squared error of the vector velocity of the wind field distur bance is less than 1m/s,and the horizontal disturbance quantity is less than 4°,which lays a good theoretical basis for t he follow-up field tests.