空间拦截弹的最优制导与非线性滤波

Optimal Guidance and Nonlinear Filtering for Space Interceptor

本文提出了一种空间拦截弹的最优制导和非线性滤波方法。由于采用了一种新的剩余时间算法,在空间拦截弹的弹体纵轴方向无轨道控制发动机的情况下,也可以实现这种最优导引规律。本文所采用的非线性滤波算法—自适应修正增益推广Kalman滤波器具有很好的稳定性,而且估计精度高。仿真结果表明,在上述最优制导及非线性滤波方法下,导弹有很高的命中精度。

An optimal guidance and nonlinear filtering method for space interceptor is presented in this paper. For a new time-to-go algorithm, the optimal guidance law can be realized without a trajectory control engine along the lengthwise axis of the missile. A nonlinear filtering algorithm, called adaptive modified gain extended Kalman Filter, is used in this paper for its good stability and estimation accuracy. The simulation results show that the precision of missile hitting target is high under the optimal guidance law and the nonlinear filtering method.