滚仰式光电吊舱地理导引实现与误差分析

董期林; 张卫国; 赵创社; 王超; 袁屹杰; 伊兴国; 刘万刚; 程勇栋

doi:10.37188/CO.2023-0188

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Chinese Optics > 2024 >

DONG Qi-lin, ZHANG Wei-guo, ZHAO Chuang-she, WANG Chao, YUAN Yi-jie, YI Xing-guo, LIU Wan-gang, CHENG Yong-dong. Realization and error analysis of geographical guidance for roll-pitch electro-optical pod[J]. Chinese Optics. doi: 10.37188/CO.2023-0188

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Realization and error analysis of geographical guidance for roll-pitch electro-optical pod

doi: 10.37188/CO.2023-0188

Xi’an Institute of Applied Optics, Xi’an 710065, China

Funds: Supported by National Defense Equipment Pre-Research Project of China (No. YY222021J0XX-X)

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Corresponding author: zzwwgg1975@163.com
Available Online: 02 Feb 2024

Abstract

Abstract

In order to improve the accuracy and success rate of geographical guidance, according to the structural characteristics of the roll-pitch electro-optical pod, a mathematical model of geographical guidance was developed through three steps: first, establishing the coordinate system; second, solving the target coordinates; and third, calculating the frame angle. Speed forward feed and small domain search modes were introduced on this basis. The frame angle calculation error affected by inertial navigation measurement error and target distance was simulated, and the results show that the longitude, latitude, and heading angle errors had a greater influence on the pitch angle calculation error; nonetheless, the errors of elevation and horizontal attitude angle had a greater influence on the calculation error of the roll angle. Improving the positioning accuracy of inertial navigation can further reduce the frame angle calculation error and improve the geographical guidance accuracy. However, when the heading angle decreases below 0.1 degrees and the horizontal attitude angle decreases below 0.05 degrees, then the influence weight of the attitude angle error also decreases. The improvement in guidance accuracy is no longer evident when attitude angle errors are reduced. Increasing target distance sharply decreases the error of frame angle calculation. Finally, the guidance test with pitch and roll mean square errors of less than 0.12 degrees shows the algorithm's accuracy and the simulation analysis's effectiveness.
- roll-pitch electro-optical pod,
- geographical guidance,
- coordinates transformation,
- error analysis

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References(19)

References

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