飞机稳态失速螺旋特点仿真

Simulation on the Characteristics of Aircraft Steady State Stall

针对现有飞机失速螺旋动力学本质和失速特点研究不足的现状,分析了飞机失速和失速螺旋产生的原因,从失速螺旋的进入、定常、改出三个阶段分析了失速螺旋的运动学特点,用力的平衡法推导出失速螺旋运动中的速度、半径、损失高度和时间的计算式及六自由度运动学方程,并运用MATLAB/Simulink平台搭建仿真模型对稳态平螺旋进行实时仿真计算,通过仿真可以直接观察失速螺旋过程中机体的实时姿态及运动轨迹,解决了飞机稳态尾旋过程状态获取困难的问题。仿真结果表明:构建的模型和使用的方法真实可靠,具有一定的实用性,相关方法也可以运用到其他机型稳态失速螺旋的研究过程中,研究结果可为相关飞行人员提供参考,为安全飞行,避免尾旋奠定理论基础。

In view of the insufficient research on the dynamic nature and stall characteristics of stall helix of aircraft,the causes of stall helix and stall helix are analyzed.The kinematic characteristics of stall helix were analyzed from three stages of stall helix entry,steady and retrofit.The formulas for calculating speed,radius,height and time of stall helix motion and six freedoms were derived by force balance method.The degree kinematics equation and the simulation model of the steady-state plane helix were built on the platform of MATLAB/Simulink.The real-time attitude and trajectory of the airframe during the stall helix process could be observed directly by the simulation.The difficulty of obtaining the steady-state state state of the aircraft during the stall helix process can be solved.The simulation results show that the model and the method used are reliable and reliable.Practicality,the relevant methods can also be applied to the study of other types of steady stall helix.The research results can provide reference for relevant pilots and lay a theoretical foundation for safe flight and avoidance of spin.