应用分块三次多项式的导引头测角精度标定  

Calibration of Seeker Angle-measuring Error with Block Three-order Polynomial

作　　者：袁东明[1,2,3] 丁亚林 张健[1,3] YUAN Dongming;DING Yalin;ZHANG Jian(Changchun Institute of Optics, Fine Mechanics and Physics,Chinese Academy of Sciences, Changchun 130033, Jilin, China;University of Chinese Academy of Sciences, Beijing 100049, China;Key Laboratory of Airborne Optical Imaging and Measurement, Changchun Institute of Optics, Fine Mechanics and Physics,Chinese Academy of Sciences, Changchun 130033, Jilin, China)

机构地区：[1]中国科学院长春光学精密机械与物理研究所,吉林长春130033 [2]中国科学院大学,北京100049 [3]中国科学院长春光学精密机械与物理研究所航空光学成像与测量中国科学院重点实验室,吉林长春130033

出　　处：《兵工学报》2019年第10期2042-2049,共8页Acta Armamentarii

基　　金：高分专项航空系统项目(30-H32A01-9005-13/15)

摘　　要：为减小和消除零件机械加工、装调及传感器误差等对某激光捷联导引头测角精度的影响,提出应用分块三次多项式的导引头测角误差标定方法。根据各项系统误差特点,同时考虑实验过程中随机误差对标定的影响,采用分块三次多项式分别建立探测器输出俯仰角、偏航角到实际指向矢量俯仰角、偏航角的映射关系,实现了测角误差标定。研究结果表明:标定后俯仰角和偏航角误差均值分别由原来的0.1360°、0.3364°降至0.0047°、0.0015°,标准差也分别由原来的0.3820°、0.3752°降至0.0269°、0.0227°;该标定方法在导引头工作视场内具有较高的精度和良好的一致性,且避免了构造复杂的数学模型进行参数识别,简便易行,可推广至类似系统的误差标定工作中。An angle-measuring error calibration method based on block three-order polynomial is proposed to reduce or eliminate the effects of machining error,assembly and adjustment error,sensor error on the angle-measuring accuracy of a laser seeker. With the consideration on the characteristics of each systematic error and the impact of random error during the experiment on calibration,the mapping relations between the pitch and yaw angles of the detector output and the real pitch and yaw angles of pointing vector are established through the block three-order polynomial for the calibration of angle-measuring error. The research results show that the calibrated means of yaw and pitch angle errors are decreased from 0. 136 0°and 0. 336 4° to 0. 004 7° and 0. 001 5°,respectively,and the standard deviations of yaw angle error and pitch angles are reduced from 0. 382 0° and 0. 375 2° to 0. 026 9° and 0. 022 7°,respectively. The proposed calibration algorithm has high accuracy and fine consistency in the field of view of seeker,and is easy to be used. A complicated mathematic model needs not to be established for parameter recognition when the proposed calibration method is used. Moreover,the method can be used for the error calibration of similar systems.

关 键 词：导引头 分块三次多项式 测角精度 标定 

分 类 号：TJ765.3[兵器科学与技术—武器系统与运用工程]