摘要
针对导弹存在参数不确定性以及外界未知干扰的情况,运用非线性H∞和PD(Proportional+Differen tial)的控制方法,提出了一种新颖的复合控制方法。通过反演(backstepping)变结构控制技术,求解非线性H∞姿态控制问题,姿态控制器取得了较好的控制效果,未知干扰得到抑制。对导弹外回路,采用PD控制器进行控制,实现期望航迹的跟踪。最后,通过针对导弹模型的非线性6DOF数学仿真表明此方法的有效性。
A novel hybrid control approach of combining nonlinear H infinity and PD (Proportional + Differential) for missiles systems with external disturbances and uncertainties is presented. An explicit solution to the nonlinear H infinity attitude control problem can be obtained by combining backstepping and variable structure control techniques. The attitude controller achieves good performance, and the unknown disturbances are attenuated. PD controller can guarantee the desired trajectory tracking in the outer loop. Finally, nonlinear six-degree-of-freedom simulation results for the missiles model are presented to demonstrate the effectiveness of the proposed control law.
出处
《宇航学报》
EI
CAS
CSCD
北大核心
2004年第4期401-407,共7页
Journal of Astronautics
关键词
非线性
PD控制器
导弹
飞行控制
nonlinearH_∞
PD controller
missile
flight control
