侵彻制导武器BTT末制导奇异性控制策略  

Singularity Control Strategy in Bank-to-Turn Guidance for Penetration Guidance Weapon

作　　者：温求遒[1] 李然[2] 何镜[1] 

机构地区：[1]北京理工大学宇航学院,北京100081 [2]中国兵器工业集团公司,北京100081

出　　处：《弹道学报》2012年第3期70-74,共5页Journal of Ballistics

摘　　要：针对侵彻制导武器BTT末制导中滚转指令奇异性问题,采用基于偏导的灵敏度方法,分析了BTT-90逻辑中奇异性产生的机理及主要影响因素;通过对末制导使用的弹道成型制导律无量纲过载分析,结合实际弹道仿真,总结了指令随时间变化规律即奇异性仅存于过载指令过零阶段.以此为基础,提出一种将BTT控制划分为正常控制与奇异性区域,并在奇异性控制区采用滚转指令平滑算法的奇异性控制策略,完成了切换条件设计.仿真结果证明,奇异性控制策略可消除由于制导指令过零带来的滚转角指令跳变现象,且对制导精度影响小.To solve the roll command singularity in end-game of bank-to-turn（BTT）for penetration guidance weapon, the formation principle of singularity and main influence factors of BTT-90 logic were analyzed based on the method of insensitivity analysis with partial derivative. The non-di- mensional overload equation of guidance law was derived,and the simulation of actual trajectory was carried out. The regularity of the command varying with time was given, and it was proved that the singularity exists only in the stage of overload command exceeding zero. A singularity control strategy was designed, and the BTT control was divided into the normal zone and singularity zone, and the roll command smoothing method was used in singularity zone. The switch scheme was introduced. The simulation result shows that the strategy can eliminate the singularity existing in the BTT guidance and has few influence on the accuracy of guidance.

关 键 词：倾斜转弯 奇异性 制导律 滚转角指令 

分 类 号：V249[航空宇航科学与技术—飞行器设计]