High-precision satellite relative-trajectory simulating servosystem for inter-satellite laser communications

Lei Zhang; Liren Liu; Zhu Luan; Hongzhan Liu; Rongwei Xu

doi:10.1117/12.557945

20 October 2004 High-precision satellite relative-trajectory simulating servosystem for inter-satellite laser communications

Lei Zhang, Liren Liu, Zhu Luan, Hongzhan Liu, Rongwei Xu

Author Affiliations +

Proceedings Volume 5550, Free-Space Laser Communications IV; (2004) https://doi.org/10.1117/12.557945
Event: Optical Science and Technology, the SPIE 49th Annual Meeting, 2004, Denver, Colorado, United States

Abstract

Because PAT (pointing-acquisition-tracking) parameters and integrated technical specifications of laser communication terminals for inter-satellite link must be pre-verified and assessed thoroughly on a ground-based test-bed before launched into the space, it is necessary to develop a system as a primary part of the test bed to simulate the relative trajectory between the satellites. In this paper, an original high-precision satellite relative-trajectory simulating servosystem is introduced in detail as well as its structures and characteristics. The system is used to simulate the motion of relative-trajectory between satellites in different orbits. The principle of the system is to import the data of two satellites’ orbits into a computer-based control system in advance. After processed and analyzed, the data is transformed into the angular displacement of the servomotor which drives the gimbal directly. The angular displacement of the two axes of the gimbal can simulate precisely the relative-trajectory, namely elevation angle and azimuth angle of the two satellites in communication. A laser communication terminal mounted on the gimbal then performs the PAT mechanisms to evaluate the system’s capacity.

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Lei Zhang, Liren Liu, Zhu Luan, Hongzhan Liu, and Rongwei Xu "High-precision satellite relative-trajectory simulating servosystem for inter-satellite laser communications", Proc. SPIE 5550, Free-Space Laser Communications IV, (20 October 2004); https://doi.org/10.1117/12.557945

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KEYWORDS

Satellites

Laser communications

Optical simulations

Device simulation

Satellite communications

Telecommunications

Acquisition tracking and pointing

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