Aiming at the penetration guidance problem of ballistic missile in middle-course flight, a simulation model of ballistic missile to avoid interception of exoatmospheric kill vehicle ( EKV) in middle-course flight is built firstly. Then the optimal pursuit-evasion strategy is computed based on differential games and the maneuvering penetration law of ballistic missile is determined according to the strategy. Finally, the penetration effect of guidance law is verified through simulation and the relationship between maneuvering beginning time and miss distance is discussed. Simulation results show that the miss distance can reach 10 m by choosing a reasonable maneuvering beginning time and the ballistic missile can avoid the interception of EKV successfully.%针对弹道导弹飞行中段的突防制导问题,首先建立了弹道导弹飞行中段机动突破EKV拦截的仿真模型;其次,基于微分对策求解出最优追-逃策略,并以此确定了弹道导弹机动突防制导律;最后,通过仿真对该制导律的突防效果进行了验证,并探讨了机动起始时间对拦截脱靶量的影响.仿真结果表明,合理地选择机动起始时间,拦截脱靶量可达10 m以上,能有效突破EKV拦截.
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