基于无迹卡尔曼滤波的捷联导引头视线角速率估计方法  

Study on LOS Angular Rate Estimation Based on UKF for Strapdown Seeker

作　　者：杨阳[1] 蔡正谊[1] 陈升泽[1] 赵帅 YANG Yang;CAI Zhengyi;Chen Shenze;ZHAO Shuai(Research & Development Center,China Academy of Launch Vehicle Technology,Beijing 100076,China)

机构地区：[1]中国运载火箭技术研究院研究发展中心,北京100076

出　　处：《兵器装备工程学报》2019年第2期215-218,共4页Journal of Ordnance Equipment Engineering

摘　　要：以视线角速率的解耦算法为基础设计扩展卡尔曼滤波器,解决了捷联导引头视线角速率无法测量,求导提取误差较大的问题,同时有效减少了传统卡尔曼滤波算法线性化误差对系统的影响。将估计得到的视线角速率与比例导引律相结合应用于末制导武器,具有较高的精度和动态性能,能满足打击机动目标的要求。Unscented Kalman Filter (UKF) was proposed to estimate the LOS angular rate, meanwhile UKF can effectively reduce the linearization error of the traditional Kalman filtering algorithm. The LOS angular rate decoupling algorithm was derived based on the movement of the terminal guided weapons and target relative relationship, and the LOS angular rate decoupling model was derived as the measurement equation. Strapdown guidance can be completed by combining estimated LOS angular with the proportional navigation. Simulation experiment was carried on terminal guided weapons, and the results prove that the method can effectively estimate the relative LOS rate information, and have high accuracy and dynamic performance for attacking target.

关 键 词：捷联导引头 无迹卡尔曼滤波 视线角速率 非线性滤波 

分 类 号：V241.6[航空宇航科学与技术—飞行器设计] TJ768[兵器科学与技术—武器系统与运用工程]