超低空空投故障状态下模糊飞行控制

摘要

针对运输机超低空空投时的飞行安全问题，对空投时飞机的纵向姿态控制律进行研究。通过选取适当的坐标系，从牛顿矢量力学出发，推导了空投过程中货物在机舱内移动时飞机纵向运动的数学模型，分析了货物的运动方程并考虑了货物因机构故障被卡死的意外情况；并基于智能控制理论，设计了模糊控制律，对空投过程进行了无控条件和模糊控制下的仿真。仿真结果表明：该模糊控制器能够有效抑制货物出舱出现故障时对运输机姿态的影响，具有良好的控制效果。%The flight control law of longitudinal attitude is researched for flight safety of the transport airdropping at ultra-low altitude. Based on Newtonian mechanics, the transport longitudinal mathematical model of heavy cargo airdrop system is established by selecting useful coordinate system. Cargo extraction dynamics model is built, and investigated a kind of important accident case, that of cargo be stuck at guide rail. The fuzzy controller is designed based on intelligent control theory and computer simulation is made under non-control condition and fuzzy control condition. Simulation results show that the fuzzy controller is effective, that is, the impact of cargo extraction fault is effectively restrained.