低空风切变危险尺度研究

飞机在低空风切变中飞行的危险性评估尺度是机载低空风切变探测、告警、回避系统设计中的关键之一。本文从飞行动力学的基本方程组出发,根据能量高度的概念,从理论上导出了低空风切变对飞行安全的危险尺度,经研究,风切变的危险主要表现在水平风的加速度U_wg和垂直风速度W_wg上。文中研究了U_wg和w_wg对危险尺度的定性、定量关系,提出了用水平风加速度这个目前机载设备能探测的参数来评估风切变的危险程度,为前视式机载低空风变探测传感器的设计提供了基础。

A STUDY ON LOW LEVEL WINDSHEAR RISK ESTIMATION CRITERION

One of the key problems of the design of airborne low level windshear detection , alter and avoidance system is the risk estimation critertion of low windshear to aircraft flight. This paper develops theoretically suck a criterion by energy height analysis main risk is caused bythe horizontal windshear acceleration U wg, and vertical wind velocity Wwg . The quantitativeand qualitative relationship between, U wg, Wwg and the risk criterion are studied in detail. Itis also attempted to estimate the risk of low level windshear to aircraft flight safety based only on the detectable windshear parameter U wg. This provides the basis for the development oflook-forward windshear detection sensors.