基于激光雷达回波的动态尾涡特征参数计算

为了实现对飞机尾涡的有效检测,提高机场跑道利用率,减少飞机延误,本文以尾涡物理模型为基础,分析尾涡的环量和径向速度分布规律,并结合尾涡的下沉及消散模型,提出一种基于激光雷达回波的动态尾涡特征参数计算方法,即利用激光雷达回波数据提取尾涡流场的速度包络,解算出尾涡径向速度分布,并根据其反演出涡核位置及尾涡环量。采用仿真的动态尾涡流场激光雷达探测回波数据进行算例分析,验证了该方法的有效性。

Calculation of characteristic parameters of dynarnic wake vortex based on lidar echo

In order to detect aircraft wake vortex effectively, improve the utilization rate of airfield runway and reduce air traffic delay, the circulation and radial velocity distributions of wake vortex were analyzed on the basis of wake vortex physical models, and an algorithm for calculating the characteristic parameters of dynamic wake vortex with the aid of lidar echo was presented, which considered both effects of vortex descent and decay. Firstly, the velocity envelops of vortex field were extracted from lidar echo data. Then such characteristic parameters as vortex core position and vortex circulation were deduced from the vortex radial velocity distributions. An example based on simulated lidar echo data of dynamic wake vortex verified the validity of the proposed algorithm.