战斗机飞行姿态对最低安全救生高度影响的仿真研究

战斗机飞行员在飞机出现危险情况时采用火箭弹射座椅作为救生装备的主要形式,在低空不利姿态下弹射时,往往需要一定的最低安全高度来保证弹射救生的成功率,在座椅性能确定的情况下,最低安全救生高度取决于弹射时飞机的飞行姿态。为此,根据火箭弹射座椅的工作原理,针对弹射过程的不同阶段,建立相应的数学模型,用仿真计算的手段来研究不同飞行姿态对最低安全救生高度的影响,以期为飞行员如何选择正确的弹射时机提供一定的理论支撑。

Simulation Study on Influence of Fighter Flight Attitude to the Minimum Safe Lifesaving Altitude

When the fighter is in dilemma,pilot will use rocket ejection seat as main life saving equipment.It always needs minimum safe lifesaving altitude to improve the success fulness of ejection-escaping in the low altitude positions（low altitude and adverse attitude）.If the performance of ejection seat is certain,minimum safe lifesaving altitude is determined by flight attitude.With the rocket ejection seat as object,the mathematical models of the ejection seat and occupant system in kinematics is established,which includes every subsystem＇s mathematical model of escape system.These mathematical models are six degree of freedom equations,they are solved based on the aerodynamic coefficients of ejection seat.The program of trajectory simulation can analyze the influence of fighter flight attitude to minimum safe lifesaving altitude.This may help the fighter pilot seize the right ejection opportunity.