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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 grasp the wind field and disturbance information over the airport in real time, and to ensure the safety of aviation flight, a method of detecting wind disturbance using coherent laser is proposed. On the basis of solving the vector velocity model of background wind field, a model to solve the wind vector perturbation velocity is established. Based on the radial velocity simulation of coherent laser echo signals, a reliable and effective radial wind speed data is provided to solve the wind vector disturbance vectors. In the case of noise interference, the damped least squares algorithm was used to solve the disturbance vector velocity of the wind farm, and the wind vector perturbations obtained at different scanning azimuth intervals were contrastively analyzed. The simulation results show that the smaller the scanning azimuth interval is, the smaller the error of the solution is. When the scanning azimuth interval is less than 60 °, the mean square error (MSE) of wind speed disturbance is less than 1 m / s and the horizontal disturbance is less than 4 ° .