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Volume 14
Issue 5
10.3390/act14050240
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This is an early access version, the complete PDF, HTML, and XML versions will be available soon.
Article

Line-of-Sight Stabilization and High-Precision Target Tracking Technology of the Risley Prism System on Motion Platforms

by
Huayang Xia
1,2,3,4,
Hongfeng Xia
1,2,3,4,
Jinying Li
1,2,3,4,*,
Yunxia Xia
1,2,3,4,
Yihan Luo
1,2,3,4,
Liangzhu Yuan
1,2,3,4,
Haotong Ma
1,2,3,4,
Piao Wen
1,2,3 and
Wenna Yuan
1,2,3,4
1
National Key Laboratory of Optical Field Manipulation Science and Technology, Chinese Academy of Sciences, Chengdu 610209, China
2
Key Laboratory of Optical Engineering, Chinese Academy of Sciences, Chengdu 610209, China
3
Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu 610209, China
4
University of Chinese Academy of Sciences, Beijing 100049, China
*
Author to whom correspondence should be addressed.
Actuators 2025, 14(5), 240; https://doi.org/10.3390/act14050240
Submission received: 6 April 2025 / Revised: 28 April 2025 / Accepted: 2 May 2025 / Published: 9 May 2025
(This article belongs to the Section Precision Actuators)
Review Reports Versions Notes

Abstract

The Risley prism system offers advantages such as compact structure and excellent dynamic performance, making it suitable for installation on static and motion platforms for target acquisition, aiming, and tracking. This paper presents a strapdown line-of-sight (LOS) stabilization method for the Risley prism system on motion platforms. The method establishes the coordinate transformation between the Risley prism and the motion platform. Real-time platform attitude angles from an inertial measurement unit (IMU) are used to compute the direction cosine matrix, which, combined with the coordinate transformation, determines the target’s actual guided position in the Risley prism’s coordinate. The Risley prism’s rotational angles are then calculated based on the target’s actual guided position to ensure LOS stability and capture the target. After LOS stabilization, an image-based closed-loop tracking cascade control system that integrates a Risley prism and a fast steering mirror with a single image detector (IBCLTCR-F), is used to enable fast and high-precision target tracking. Experimental results demonstrate that the proposed method achieves disturbance rejection of −32.8 dB, −28.8 dB, and −17.3 dB for platform disturbances at 0.05 Hz, 0.2 Hz, and 0.5 Hz, respectively. Furthermore, compared to the Risley prism system, the IBCLTCR-F system improves the dynamic response capability of target tracking in the nonlinear region by a factor of 10 and reduces the tracking error by 70%.
Keywords: motion platform; Risley prism; line-of-sight stabilization; fast and high-precision target tracking motion platform; Risley prism; line-of-sight stabilization; fast and high-precision target tracking

Share and Cite

MDPI and ACS Style

Xia, H.; Xia, H.; Li, J.; Xia, Y.; Luo, Y.; Yuan, L.; Ma, H.; Wen, P.; Yuan, W. Line-of-Sight Stabilization and High-Precision Target Tracking Technology of the Risley Prism System on Motion Platforms. Actuators 2025, 14, 240. https://doi.org/10.3390/act14050240

AMA Style

Xia H, Xia H, Li J, Xia Y, Luo Y, Yuan L, Ma H, Wen P, Yuan W. Line-of-Sight Stabilization and High-Precision Target Tracking Technology of the Risley Prism System on Motion Platforms. Actuators. 2025; 14(5):240. https://doi.org/10.3390/act14050240

Chicago/Turabian Style

Xia, Huayang, Hongfeng Xia, Jinying Li, Yunxia Xia, Yihan Luo, Liangzhu Yuan, Haotong Ma, Piao Wen, and Wenna Yuan. 2025. "Line-of-Sight Stabilization and High-Precision Target Tracking Technology of the Risley Prism System on Motion Platforms" Actuators 14, no. 5: 240. https://doi.org/10.3390/act14050240

APA Style

Xia, H., Xia, H., Li, J., Xia, Y., Luo, Y., Yuan, L., Ma, H., Wen, P., & Yuan, W. (2025). Line-of-Sight Stabilization and High-Precision Target Tracking Technology of the Risley Prism System on Motion Platforms. Actuators, 14(5), 240. https://doi.org/10.3390/act14050240

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