地效飞行器的纵向稳定性和增稳系统研究

Research on Longitudinal Stability and Stability Augmentation System of Ground Effect Aircraft

摘要:

针对地效飞行器因地面效应对纵向系统稳定性的影响，从系统稳定性定义和状态空间稳定判据两个方面，分析了地效飞行器的静稳定性判定条件，利用劳斯维茨判据分析了系统纵向模态的动稳定性，针对纵向动稳定性不足和高度稳定控制的问题，基于飞行包线内典型状态点处的线性模型，采用线性二次型调节器设计了系统的纵向增稳控制律，采用自抗扰控制设计了高度控制律。仿真结果表明，所设计的增稳控制律可以使系统稳定，且具有较强的鲁棒性，所设计的高度控制律使系统具有较强的动态性能，能够准确达到预定飞行高度并保持稳定，响应时间不超过15s。

Abstract:

Aiming at the influence of the ground effect aircraft on the longitudinal system stability, the static stability judgment conditions of the ground effect aircraft are analyzed from the definition of system stability and the state space stability criterion. Based on the linear model at the typical state point in the flight envelope, a linear quadratic regulator is used to design the longitudinal stability augmentation of the system. The control law is designed with active disturbance rejection control. The simulation results show that the designed stability augmentation control law can make the system stable and has strong robustness. The response time does not exceed 15s.