基于扩张状态观测器的反预警滑模制导律

针对预警机的特殊作用,提出了利用临近空间高超声速飞行器的高度优势与速度优势,对预警机实施打击的概念,设计了反预警的制导律。针对预警机的机动,将其视为外在扰动,利用扩张状态观测器将其扩张为一个新的状态量,并对此状态量进行实时观测,将其补偿到制导指令中,有效解决了拦截末端需用过载过大的问题;同时对攻击目标时的落角进行约束,设计了带有落角约束的滑模制导律。将所设计的制导律与传统的弹道成型制导律作对比,结果表明,在飞行末段,滑模制导律具有更小的过载与视线角速度,相比传统弹道成型更具优势。

Anti-early-warning airplane sliding mode guidance law based on extended state observer

Aiming at the special roles of the early warning airplane, the concept of striking the early warning airplanes by using the height and speed advantages of near space hypersonic flight vehicles is proposed, and the anti-early-warning guidance law is designed. For the maneuverings of the early warning airplane, they are regarded as external disturbances, and expanded into new states by using the extended state observer. This could make the system have real-time observations and dynamic compensations for the disturbances, whicheffectively solves the problem of the large overloads at the end of the interception. At the same time, the impact angle is constrained when the targets are attacked, and then the sliding mode guidance law with the impact angle constraint is designed. Compared with the traditional trajectory shaping guidance law, the results of the proposed guidance law show the superiorities of the lower overloads and line-of-sight angular velocities during the flight.