误差源对半捷联导引头信息提取精度的影响  

The Influence of Error Sources on the Information Extraction Accuracy of Semi-strapdown Seeker

作　　者：李然[1,2] 温求遒[1] 洪超[1] 夏群利 LI Ran1,2, WEN Qiuqiu1, HONG Chao1, XIA Qunli1(1 Beijing Institute of Technology, Beijing 100081, China; 2 China North Industries Group Corporation, Beijing 100091, Chin)

机构地区：[1]北京理工大学,北京100081 [2]中国兵器工业集团公司,北京100091

出　　处：《弹箭与制导学报》2017年第4期36-42,共7页Journal of Projectiles,Rockets,Missiles and Guidance

摘　　要：针对导引头半捷联稳定平台设计过程中存在的各项误差及其影响问题,首先分别基于空间角度关系及四元素法,建立了半捷联平台角速度及框架角控制模型;进而以角速度指令转换、角速度测量及匹配滤波为主要误差源,分析了对稳定平台控制与角速度信息提取精度的影响机理,并进行了仿真计算。研究结果表明,平台框架角速度测量误差受其它误差源的影响较小,位置传感器微分后的测速误差对视线角速度测量误差的影响较大,半捷联导引头的稳定性能主要取决于校正控制回路的设计和匹配滤波器的设计,而匹配滤波器将决定平台稳定的精度及隔离度水平。The paper focused on the errors and their effects existing in the process of semi-strapdown stabilized platform design for seeker. Firstly, the control models of semi-strapdown platform angular velocity and frame angle were built based on the space angle relationship and quaternion method separately. Then, taking angular velocity command transfer, angular velocity calculation and matched filtering as the main error source, the influence mechanism of stabilized platform control and the extraction accuracy of angular velocity information were analyzed, and the simulation was carried out. The results showed that the platform framework angular velocity measurement error was hardly affected by other error sources, and the measurement error of line of sight angular velocity was greatly influenced by the velocity measurement error of position sensor after differential. The stability performance of semi-strapdown seeker mainly depended on the design of correction control loop and matched filter, while the matched filter would determine the precision and isolation levels of the stability of the platform.

关 键 词：半捷联稳定平台 角速率控制 框架角控制 匹配滤波 四元数 

分 类 号：TJ765.3[兵器科学与技术—武器系统与运用工程]