基于终端角约束的动能拦截器滑模导引律设计

Design of EKV Sliding Mode Guidance Law Based on Terminal Angle Limit

研究了一种带有终端角约束的导引方法。推导得到了视线坐标系下目标速度方向与视线转率的关系,建立了基于终端角约束的拦截模型,并进一步设计了基于拦截模型非线性的双环滑模导引率,同时合理选择了滑模趋近率。仿真结果表明了这种导引方法能有效减小攻击角,减小脱靶量,很好的实现顺轨或逆轨拦截的目的。

A guidance method based on terminal angle limit was researched. By deduction,the relationship between target velocity direction and LOS angle velocity was found in LOS coordinate system,and intercept model based on terminal angle limit was built. Furthermore,on the basis of model nonlinearity,the double ring sliding mode guidance law was designed and sliding mode approach rate was also chosen reasonably. The simulation result explained the effect of this method could reduce attack angle and target-missing quality,the aim of direct rail or reverse course interceptor effectively was targeted.