全捷联导引头制导信息滤波算法及仿真  

Algorithm and Simulation for Guidance Information Filter for Strapdown Seekers

作　　者：张韬[1,2] 张希铭[1,2] 王民钢[1,2] 

机构地区：[1]西北工业大学航天学院,陕西西安710072 [2]飞行控制与仿真技术研究所,陕西西安710072

出　　处：《西北工业大学学报》2015年第5期744-749,共6页Journal of Northwestern Polytechnical University

摘　　要：全捷联导引头存在制导所需的视线角速度信号不能直接测量的问题,基于无迹施密特卡尔曼滤波器(unscented Schmidt-Kalman filter,USKF)提出了一种全捷联导引头的制导信息提取算法。USKF对增广状态中的参数向量不进行校正,避免了参数观测误差过大对于滤波器性能的影响。在目标机动及制导律有落角约束要求的条件下,对制导信息提取算法进行了仿真验证。仿真结果表明,USKF滤波器性能优于传统非线性滤波器EKF及UKF,能够更准确地给出制导律所需信息,为全捷联导引头方案提供了理论基础及工程应用参考。Problem exists in strapdown seekers that the line of sight rate cannot be directly measured, which is used for homing guidance. This paper develops an algorithm for strapdown seeker guidance information filtering based on unscented Schmidt-Kalman filter（USKF）. The USKF does not correct the parameters in augmented state vector, thus avoiding performance reduction duo to large estimation error of parameters. We conducted simulations to verify the guidance information filtering algorithm, assuming maneuvering target and guidance law with constrained impact angle. Results and their analysis show preliminarily that USKF performs better than EKF and UKF, both traditional nonlinear filters, and gives more precise guidance information, thus giving seeker system design engineering reference for strapdown seeker system design.

关 键 词：全捷联寻的制导 无迹施密特卡尔曼滤波 弹道成型导引律 

分 类 号：TJ765.3[兵器科学与技术—武器系统与运用工程]