无线电高度表近地测高异常分析及改进

对于轮式起降无人机而言,起降阶段相对高度的准确性对无人机的飞行安全至关重要。针对高速无人机无线电高度表近地测高出现高度拾升和饱和现象,从无线电高度表测高机理出发,深入分析高度跳变的原因,针对问题现象,在不改变安装高度的前提下,提出一种低高度变增益的方法,降低高度饱和噪声的优化措施,有效提高了无线电高度表近地测高的稳定性。通过吊高试验及地面滑行试验表明,优化措施能合理有效解决高度表近地高度测量异常的问题。

Analysis and Improvement of Low Height Abnormal Measurementby Radio Altimeter

Height measurement is a fatal factor for take-off and landing flight stage of wheeled UAVsafety. Based on the fault phenomenon of radio altimeter that height saturation and height rising whentaking off and landing ,the reasons have been analyzed and located. The result suggests that the lowinstallation of altimeter with a large reflection angle will cause unstable working state. In order tosolve this problem, a novel method was proposed to decrease the possibility of altimeter saturationand height rising. This method is proven reasonable and effective by sliding and lift off experiments.