光学学报, 2013, 33 (9): 0912001, 网络出版: 2013-05-14
共形光学导引头瞄视误差分析与修正 下载: 586次
Boresight Error Analysis and Correction of Conformal Infrared Seeker
测量 共形光学 误差分析 误差修正 瞄视误差 目标视场 measurement conformal optics error analysis error correction boresight error field of regard
摘要
共形光学导引头中采用了大量的二次曲面和非球面,共形光学系统不具备点对称特性,导致导引头随目标视场的变化而产生瞄视误差。分析了共形光学系统瞄视误差的产生机理,利用光线追迹法,得到了0°~20°的目标视场中瞄视误差的仿真结果,计算出瞄视误差与目标视场的相关系数为0.9932。利用模板相关匹配法测试了共形红外导引头的瞄视误差,拟合了导引头瞄视误差的二次曲线,对比得到仿真数据的相对误差为5.02%。利用一元非线性回归分析法建立了误差修正公式,误差修正后的导引头的瞄视误差小于30 μm,跟踪精度提高至±1 pixel,可以满足导引头伺服控制系统的精度要求。实验结果为共形光学系统的设计和优化提供了部分依据。
Abstract
Infrared conformal seeker has demonstrated its capabilities as a prominent technique for the supersonic characteristic. To achieve the potential accuracy of target tracing, boresight error should be corrected as a result of using aspheric and quadric surfaces in conformal optics system. This paper describes boresight error measurement and correction in conformal infrared seeker. Expression and correlation coefficient of boresight error along with field of regard (FOR) ranging from 0° to 20° are obtained using ray tracing simulation. Boresight error measurement has been accomplished by correlation matching method, and results illuminate that the relative error is 5.02%. Error correction model by unitary nolinear regression analysis is introduced. The experimental results have demonstrated that boresight error is reduced to lower than 30 μm and tracking accuracy is improved to ±1 pixel. The results can meet the precision requirement of servo control system and provide part of the basis for optics system optimization.
王超, 姜湖海, 朱瑞飞, 虞林瑶, 张天翼, 魏群, 贾宏光. 共形光学导引头瞄视误差分析与修正[J]. 光学学报, 2013, 33(9): 0912001. Wang Chao, Jiang Huhai, Zhu Ruifei, Yu Linyao, Zhang Tianyi, Wei Qun, Jia Hongguang. Boresight Error Analysis and Correction of Conformal Infrared Seeker[J]. Acta Optica Sinica, 2013, 33(9): 0912001.