捷联成像制导系统的若干问题探讨

Discussion on strapdown imaging guidance system

对比捷联成像导引头和传统成像导引头的特点,指出捷联成像寻的制导技术应用到实际的导弹系统中,需要解决视线角速率提取、数学平台的实现以及制导和控制系统综合设计等问题。给出了各坐标系之间的转换关系,据此推导了捷联成像寻的制导的弹体姿态解耦算法,针对捷联成像导引头的大测量噪声以及系统的非线性,介绍了采用Unscented卡尔曼滤波器估计视线角速率的基本原理,并对捷联成像制导与控制系统进行了分析,给出了制导与控制系统综合设计的思路。

In this paper,it is pointed out that several problems such as obtaining the line of sight （LOS）rate, realizing of the mathematics decoupling algorithm, integrated designing for guidance and control system must be solved if the strapdown imaging guidance technique could be realized in the missile system, by comparing characters of strapdown imaging seekers and gimbaled seekers. The rotation relationship between all coordinates and attitude decoupling algorithm of strapdown imaging homing missiles are derived. Considering measurement noise and nonlinearity of the strapdown imaging guidance system, the principle of Unscented Kalman Filter （UKF） is introduced to estimate LOS rate. Strapdown imaging guidance and control system is analyzed, and ideas about integrated designing for system are proposed.