机动时间常数未知目标的拦截方法研究  

Maneuvering Target Interception with Unknown Time Lag

作　　者：陈兴林[1] 花文华[1] 

机构地区：[1]哈尔滨工业大学航天学院,哈尔滨150001

出　　处：《航天控制》2011年第4期8-13,共6页Aerospace Control

基　　金：黑龙江省科技攻关计划(GZ06A104)

摘　　要：由于目标机动时间常数会对拦截导弹的性能产生重要的影响,且一般基于目标机动动态考虑的制导律都假设这一常数是已知的,在实际的拦截情形中并不合理。针对这两点,本文采用成型滤波器表示目标的随机机动策略,对原系统的状态进行扩展,并利用扩展后的系统构建多模型自适应估计器的成员滤波器,以实现对于目标机动时间常数的在线估计。仿真结果表明该方法可以较好地获得目标机动时间常数估计,实现对真实值的收敛,从而产生正确的控制命令,改善拦截导弹性能。The target maneuvering time constant takes the important effect on the performance of intercep- tion missiles, but it is not appropriate to make constant assumption of this time constant as some literatures that did in actual interception scenarios. Based on the unknown assumption of this time constant, the sha- ping filter method is adopted to model the random maneuvering strategy of target and extends the original system states. The elemental filters of a multiple model adaptive estimator based on the extended system are established to realize the online estimation of the unknown target maneuvering time constant. The simulation results show that this design method can realize the convergence to the true maneuvering time constant and the correct commands are reformed for interception missile performance improvement.

关 键 词：末制导 多模型自适应估计 机动动态 成型滤波器 

分 类 号：V448.133[航空宇航科学与技术—飞行器设计]