突风对着陆飞机下滑飞行的安全性影响

Effects of Gust on Aircraft Flight Safety in Glide Flight

摘要:

突风会引起飞机过载和飞行状态的改变,威胁飞机飞行安全。在飞机六自由度运动学方程的基础上,根据下滑飞行中驾驶员操纵行为的特点建立了飞机驾驶员的数学模型,并考虑突风的影响,建立了“驾驶员-飞机-突风”闭环飞机的数学仿真模型。通过引入飞机飞行安全性的量化评估理论以及表征方法,并根据飞机的飞行状态对飞机的安全性进行量化分析。选取某型飞机着陆下滑过程中进入突风风场的飞行状态进行仿真研究,结果表明风会改变飞机的气动角和空速,导致飞机的过载及飞行轨迹发生变化,尤其在飞机飞行高度较低时,风扰引起的大 但目前的研究主要集中在以阵风减缓设计为目的的 迎角姿态和飞机飞行轨迹变化将威胁飞机的飞行安全。

Abstract:

Gusts can cause an overload aircraft and flight state changes, even threaten flight safety. Based on the six de.grees of freedom motion equation aircraft, in this paper, a mathematical model of the pilot was presented according to thecontrol characteristics of pilot in glide flight, and then the "Pilot-aircraft-gust" closed-loop simulation model was estab.lished and considering the impact of gusts. By introducing the quantitative analysis theory and characterization method,the aircraft flight safety was quantified based on its flight state. Simulation of certain aircraft's flight state in glide landingmode in gust field was carried out. The results showed that the wind could affect the aircraft's aerodynamic angle and air.speed, change the overload and aircraft flight path. These changes would be significant and threaten the safety of aircraftflight especially at low altitudes.