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首页> 外文会议>AHS 59th Annual Forum Proceedings Vol.1 May 6-8, 2003 Phoenix, Arizona >OBSTACLE (AND) TERRAIN AVOIDANCE AND MAPPING SENSOR FOR HELICOPTERS AND OTHER AIRCRAFT
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OBSTACLE (AND) TERRAIN AVOIDANCE AND MAPPING SENSOR FOR HELICOPTERS AND OTHER AIRCRAFT

机译：直升机和其他飞机的障碍（和）地形回避和映射传感器

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摘要

The sensor is a low power, low probability of intercept (LPI) radar, operating at a relatively low frequency and using small, broad beam, non scanning antennas. It will provide terrain avoidance, point obstacle avoidance and warning against controlled flight into terrain (CFIT) with good penetration of rain, fog, smoke and dust. It will also detect, recognize, and display wires with their ranges and orientations. The sensor uses Doppler spectrum analysis to generate a set of Doppler filters, representing, each, two conical surfaces. The conical surfaces intersect with range spheres, resulting in a division of the terrain into a large number of range-Doppler cells. The azimuth of each cell is measured using a conventional direction finding scheme. The elevation angle of the cell or obstacle is calculated using its azimuth and the head angle of the relevant cone. Based on the three coordinates obtained for each cell, a 3D map or a set of contours can be generated and displayed. Wires are detected and recognized using their unique radar backscatter characteristics at low frequency.
机译：该传感器是低功率，低拦截概率（LPI）雷达，以相对较低的频率运行，并使用小型，宽波束非扫描天线。它将提供避开地形，避开点障碍物的功能，并警告雨水，雾气，烟雾和灰尘的良好渗透，从而控制飞行进入地形（CFIT）。它还将检测，识别和显示导线的范围和方向。该传感器使用多普勒频谱分析来生成一组多普勒滤波器，分别代表两个锥形表面。圆锥形表面与距离球相交，导致将地形划分为大量的距离多普勒单元。使用常规测向方案测量每个小区的方位角。单元格或障碍物的仰角是使用其方位角和相关圆锥的顶角来计算的。基于为每个单元格获得的三个坐标，可以生成和显示3D地图或一组轮廓。借助其独特的低频雷达反向散射特性，可以检测和识别导线。

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