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考虑拦截器使用固体推进系统的情况,设计了基于零控脱靶量(ZEM)的大气层外超远程拦截制导方法。首先设计了考虑摄动影响的适用于超远程拦截的零控脱靶量计算方法;其次使用变分法结合Kepler轨道摄动方程推导了线性的ZEM动力学方程;最后考虑固体推进拦截器的可控性约束条件设计了ZEM控制律并结合动力学方程确定指令推力方向。本文给出的制导方法设计过程中没有对拦截器和目标的引力差进行简化,考虑了摄动因素对滑行段弹道的影响,制导精度对推进系统参数偏差的鲁棒性好。仿真结果表明使用本文制导方法拦截大气层外超远程目标,脱靶量可达公里量级,推进系统参数偏差对制导精度的影响很小。
Considering the situation that the interceptor uses the solid propulsion system, an extra-long-range super-long-range interception guidance method based on zero-control miss distance (ZEM) is designed. Firstly, the calculation method of zero-control miss distance for ultra-long-range intercept considering the influence of perturbation is designed. Secondly, the linear ZEM dynamic equation is deduced by variational method combined with Kepler orbit perturbation equation. Finally, the controllable solid propellant interceptor The ZEM control law is designed by the sexual constraint and the thrust direction of the command is determined by the kinetic equation. The guidance method proposed in this paper does not simplify the gravitational difference between the interceptor and the target. The influence of perturbation factors on the trajectory of the taxiway is considered. The guidance accuracy is good to the deviation of the propulsion system parameters. The simulation results show that using the guidance method of this paper to intercept the extra-long-range outer targets, the miss distance can reach the order of kilometers, and the influence of the propulsion system parameter deviation on the guidance accuracy is very small.