Research on Line-of-Sight Angular Rate Extraction of Strapdown Optical Seekers

doi:10.3969/j.issn.1009-086x.2023.06.010

Abstract

Abstract:

With the rapid development of the global military， missiles play an increasingly important role in modern war. The realization of precise guidance for missiles has become an important problem to be solved at present， and the optical seeker is an important equipment to realize precise guidance. The traditional gimbal optical seeker has many disadvantages such as large volume， high cost， and complex structure， so the strapdown optical seeker appears. Although the strapdown optical seeker can effectively solve the problems above， its detector is fixed on the missile. In addition， there are problems such as high noise， attitude coupling， and phase matching， and the strapdown optical seeker requires high filtering/estimation algorithms. In this paper， the principle， composition， and application background of strapdown optical seekers are introduced， combed， and summarized. Through the simulation of the estimation effect of adaptive unscented Kalman filter and unscented Kalman filter， it is found that the adaptive unscented Kalman filter has higher accuracy. Finally， the future development in this field is prospected.

Key words: precise guidance, strapdown optical seeker, attitude coupling, phase matching, adaptive unscented Kalman filter（AUKF）, unscented Kalman filter（UKF）

摘要：

随着全球军事的飞速发展，导弹在现代战争中的地位愈发重要。对导弹实现精确制导已成为当前急需解决的问题,光学导引头是实现精确制导的关键设备。传统的框架式光学导引头由于存在体积大、成本高、结构复杂等诸多缺点，便有了全捷联光学导引头的出现。全捷联光学导引头虽然能够有效解决上述问题，但其探测器与弹体固联，存在噪声较大、姿态耦合、相位匹配等问题，因此它对滤波/估计算法要求较高。对全捷联光学导引头的原理、组成应用背景进行了介绍分析、梳理和总结，对自适应无迹卡尔曼滤波器和无迹卡尔曼滤波器的估计效果进行了仿真,通过对比发现，自适应无迹卡尔曼滤波器精度更高。最后，对该领域未来的发展作出展望。

关键词: 精确制导, 全捷联光学导引头, 姿态耦合, 相位匹配, 自适应无迹卡尔曼滤波, 无迹卡尔曼滤波

CLC Number:

TJ765.3⁺31

Jia'nan WANG, Xiaole PENG, Zhihao WANG, Zheng TAN. Research on Line-of-Sight Angular Rate Extraction of Strapdown Optical Seekers[J]. Modern Defense Technology, 2023, 51(6): 77-86.

王嘉楠, 彭晓乐, 王之昊, 谭铮. 全捷联光学导引头视线角速率提取研究[J]. 现代防御技术, 2023, 51(6): 77-86.

Figures/Tables 13

Fig. 1 Basic composition of homing guidance system

Fig. 2 Principle of strapdown seeker

Fig. 3 Block diagram of strapdown seeker

Fig. 4 Block diagram of missile body lien-of-sight angle model

Fig. 5 Block diagram of decoupling algorithm for addition before differentiation

Fig. 6 Block diagram of decoupling algorithm for addition after differentiation

Fig. 7 UKF estimated line-of-sight azimuth rate

Fig. 8 UKF estimated line-of-sight high and low angular rate

Fig. 9 UKF estimation error

Fig. 10 AUKF estimated line-of-sight azimuth rate

Fig. 11 AUKF estimated line-of-sight high and low angular rate

Fig. 12 AUKF estimation error

Fig. 13 Line-of-sight angular rate extraction by UKF and missile body attitude information

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