摘要
研究对末制导目标搜索优化控制问题,由于目标捕获是大气层外拦截器在中末制导交接班时必须完成的工作,针对制导交接班时的目标搜索算法和对应的快速姿态机动控制方法进行了研究。根据目标相对拦截器位置的概率分布,设计了一种考虑目标-拦截器相对运动的目标搜索算法。并以搜索时间、捕获概率为控制器指标,拦截器的姿态机动能力为基础,利用算法调节参数的选择。根据固体推进器拦截器的姿态运动特点,并给出了最终滑模控制的姿态跟踪控制器。并对搜索算法与姿控系统进行拦截器目标捕获数字仿真,分析了拦截器姿态跟踪的性能,以及搜索时间与目标位置的关系。结果表明,姿态跟踪误差小于0.5°,控制精度高,快速性好,可为搜索算法与拦截器姿控系统设计提供了科学依据。
Target searching is the job which must be accomplished in the endgame of exoatmosphere kill vehicles.Target searching algorithm and the corresponding quick maneuver method were approached.A searching algorithm in view of the target-EKV relative motion was proposed based on the distribution of the targets.The selection of the parameters in the algorithm was analysed,considering the searching time,probability of capture and the maneuver capability of EKV.Then solid propellant was arranged to be used and the attitude kinematics of EKV was described by Euler-Angle.A fast attitude controller was derived based on ultimate sliding mode control theory.Finally,a digital simulation was carried out to demonstrate the effectiveness of the target searching algorithm and the attitude control method,and the results show the attitude error is less than 0.5°.
出处
《计算机仿真》
CSCD
北大核心
2011年第11期73-77,129,共6页
Computer Simulation
关键词
大气层外拦截器
目标捕获
姿态跟踪
Exoatmosphere kill vehicle
Target searching
Attitude tracking
