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针对大气层外用于拦截目标动能拦截器(KKV)的制导律设计问题,采用非线性干扰观测器(NDO)及滑模变结构控制思想设计了一种基于碰撞航线的制导律.通过控制导弹攻角,使导弹的速度方向始终指向预期碰撞点,并利用NDO对目标加速度进行有效估计及动态补偿,降低了导弹所需的过载,并提高了命中时的速度.同时,分别从拦截轨迹、可拦截目标区域及拦截目标速度范围对机动目标进行拦截仿真,并与以零化视线角速率为目标设计的有限时间收敛制导律对比,仿真结果表明对于动能拦截器采用基于碰撞航线的滑模制导律具有更好的制导性能.
A guidance law based on collision course is designed by adopting nonlinear disturbance observer (NDO) and sliding mode variable structure control (MCDV) guidance law for the design of guidance law outside the atmosphere for intercepting target kinetic energy interceptor (KKV) , So that the missile’s velocity direction always point to the expected collision point, and the use of NDO to effectively estimate the target acceleration and dynamic compensation, reducing the missile required overload and improve the speed of the hit.At the same time, respectively, from the interception trajectory can be intercepted The simulation results show that the sliding mode guidance law based on the collision course for kinetic energy interceptors has the following characteristics: (1) Better guidance performance.