基于变结构方法的空空导弹鲁棒逆控制律设计

摘要

The dynamic inverse and variable structure methods are combined to design the robust inverse control law for air to air missile by adopting the two-loop structure in order to overcome the dynamic inverse shortcomings of its intense dependence to the object' s accurate model and bad robustness.The missile' s flight states are separated into fast and slow subsystems.The variable structure control is used to design the slow subsystem control law and the extended state observer is designed to estimate the indeterminacy in the outer ring and the dynamic inverse control is used to design the fast one.The simulation results show that the designed control law has better dynamic characteristics and robustness.%为克服动态逆控制严重依赖被控对象精确数学模型且鲁棒性较差的缺点,将动态逆与变结构方法相结合采用双环结构设计了空空导弹鲁棒动态逆控制律.将导弹飞行状态划分成快慢2个回路,慢回路(外环)采用变结构控制,并设计扩张状态观测器,对外环中的不确定性进行估计；快回路(内环)采用动态逆控制.仿真结果表明,所设计的控制律具有较好的动态特性和鲁棒性能.