飞机起落架半主动控制仿真研究

Simulation of the Semi-Active Control of Aircraft Landing Gear

该文总结了飞机起落架的三种控制方法:被动控制,主动控制,半主动控制。传统的起落架控制方法不能使飞机很快的达到稳定,为了解决这一问题,该文分析了半主动控制的优点,建立起了半主动控制起落架的数学模型和线性状态控制方程,并根据现代控制理论分析被动控制起落架系统的稳定性和可控性。采用常规状态反馈的控制方法对起落架系统进行设计,得到了半主动控制器。最后通过仿真软件分别对被动控制和半主动控制的起落架模型进行了仿真分析。仿真结果表明:被动控制起落架有较强的振荡,系统稳定时间也较长。而半主动控制起落架能够有效的降低飞机冲击载荷和振动响应,使飞机很快达到稳定。

The article summarizes three control methods of aircraft landing gear： passive control, active control and semi -active control. The traditional control method can not stabilize the airplane very soon. In order to solve this problem, the article analyzes the virtue of semi - active control. A mathematical model and linear state control equation of semi - active control landing gear is established. According to the modem control theory, the stability and controllability of passive control landing gear are analyzed. A state feedback semi - active controller is designed. At last , the passive control landing gear module and semi - active control landing gear module are simulated. Simulation result shows ： the vibration of passive control landing gear is vehement, and the system stable time is long. But in the semi - active control landing gear system the impact load and vibration can be reduced, the aircraft can reach the stability state in a few seconds.