基于解耦的导弹模糊变结构控制方法

The Study of Fuzzy Variable Structure Control Method based on Decoupling Principle for Missile

导弹在某一飞行过程中通道间存在耦合,需要通过解耦进行控制。为了节省弹载计算机的存储空间,在系统参数逐点变化的情况下,选择一些特征点进行解耦。充分考虑了系统中未解耦点处的较大残余耦合量和系统参数不确定性的情况,设计了相应的模糊变结构控制器,有效地克服残余耦合量和参数不确定性给系统稳定性带来的影响,并且也很好地抑制了变结构控制系统中存在的抖振。仿真表明,相对于传统P ID控制方法,模糊变结构控制具有良好的动态性和鲁棒性。

There is being coupling between missile＇s channels in a certain process of flight, which can be controlled with the method of decoupling. Parameters of system change every point, but decoupling in some characteristic points for saving memory space. This paper considers greater remainder coupling and parameter uncertain sufficiently at no decoupling point in a system, and design a corresponding fuzzy variable structure controller, which can overcome the instability produced by remainder coupling and uncertainty in the system, and restraint quiver efficiently in the variable structure control system. Numerical simulation results are presented to show that the fuzzy variable structure control, compared with traditional PID control method, has a better dynamic performance and stronger robustness.