民机横侧改出风切变的失控包线保护控制

LoC Envelope Protection Control of Civil Aircraft's Lateral Escape from Wind Shear

设计了一种民机横侧改出风切变的多环控制方法。对内环采用非线性动态逆(NDI)进行失控(Lo C)包线保护,并根据实时扰动风采用变增益比例-积分-微分(PID)控制实现推力输出控制。结合能量高度、F因子等传统风切变指标,通过模糊控制给出横侧改出的控制策略。结果表明:与传统的改出控制策略相比,多环控制改出方法能够有效实现飞行失控包线保护,保证飞机本体的飞行安全性。

The wind shear escape control method from the point of preventing loss of control（ LoC） in flight was proposed. A multi-loop control method for civil aircraft＇s lateral escape was designed.Nonlinear dynamic inversion（ NDI） was adopted for inner control loop design to protect the LoC envelope. Furthermore,engine thrust was controlled based on gain scheduling proportion-integraldifferential（ PID） method according to real wind disturbance. Combined with wind shear performance objectives such as specific energy and F factor, the control decision of lateral escape was given based on fuzzy control. Compared with the traditional escape strategy, the simulation results show that the multiloop control method can effectively restrict flight states in the LoC envelope,and aircraft＇s flight safety can be guaranteed.