基于变结构的空间杀伤器末制导律研究

Research on Terminal Guidance Law for Space Kill Vehicle Based on Variable Structure

针对空间杀伤器高速交会条件下的末制导问题,首先在建立空间杀伤器动力学模型的基础上,基于相对运动方程设计了采用指数趋近律的变结构制导律,然后进行了平滑处理以抑制系统抖动,最后采用Schmitt触发器对制导指令进行了脉宽调制。仿真结果表明:针对空间目标杀伤变结构制导律具有鲁棒性强、脱靶量小和燃料消耗低的优势,证明了该方法的有效性。

The terminal guidance law for space kill vehicle in high-speed encounter was studied.Firstly,dynamic models of space kill vechicle were established.Then the variable structure guidance law was designed adopting exponential approach law based on the relative motion equation,and chattering was weakened through smoothing.Lastly,pulse width modulation was conducted for guidance command by Schmitt Trigger.The simulation results showed that the guidance law against space target presented in this paper was effective,which had the merits:strong robustness,small miss distance,and low fuel consumption.