摘要
由于螺旋桨滑流的影响,某运输机起飞构型在小迎角时纵向稳定性裕度不足,甚至不稳定,给飞机带来安全隐患。分析了某运输机起飞构型纵向力矩特性,讨论了螺旋桨滑流对纵向静稳定性的影响、影响飞机起飞时的安全因素和进入小迎角飞行的条件,建立了飞机起飞的数学仿真模型,通过大量的仿真计算,研究了突风和驾驶员误操纵对飞机起飞安全性的影响,给出了起飞时飞机所能抗御的最大突风速度。研究结果表明,某运输机小迎角稳定裕度不足,不稳定对飞机安全起飞的影响可以不予考虑。
The propeller slipstream result in longitudinal stability margin insufficient, even static instabili- ty at low angles of attack of an aircraft, which may cause potential problem. In order to study the effect of the static instability on take-off safety, the effect of propeller slipstream on longitudinal static stability was discussed. The pitching moment characteristic, the factor which has effect on safe take-off, and the con- ditons which may cause an aircraft flying at low angles attack were analyzed. Building dynamic model, the influence of gust and the pilot misoperation on the take-off safety were studied through computation and simulation. The maximum velocity of gust that an aircraft can resist was given. The result indicates the effect of the static instability on the take-off safety can be neglected.
出处
《飞行力学》
CSCD
北大核心
2013年第1期15-18,共4页
Flight Dynamics
关键词
突风
纵向不稳定
安全性
小迎角
gust
longitudinal instability
safety
low angles of attack
