Pointing, acquisition, and tracking system of the European SILEX program: a major technological step for intersatellite optical communication

Bailly, M.; Perez, Eric

doi:10.1117/12.43749

Cited by 13 publications

(3 citation statements)

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“…The laser pointing accuracy of 0.1 /irad is assumed, which is technically challenging but not impossible, judging from the state of art of the laser intersatellite communication. 3 As the spot diameter, weassume 0.1 m at 500 km distance. This spot can be made by a mirror of 1.6-m diam at the satellite.…”

Section: System Specificationmentioning

confidence: 99%

Removal of orbital debris from low Earth orbit by laser-generated drag

Cho

1994

Journal of Spacecraft and Rockets

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Section: System Specificationmentioning

confidence: 99%

Removal of orbital debris from low Earth orbit by laser-generated drag

Cho

1994

Journal of Spacecraft and Rockets

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“…With the advantages of high data rates, a small size and low power are in demand. Intersatellite laser link (ISLL) technology has been widely studied [1][2][3]. Several ISLLs have been first established such as ARTEMIS-SPOT4, OICETS-ARTEMIS, and NFIRE-TerraSAR-X [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Point-ahead analysis and pre-pointing link stability study of intersatellite laser communication

Zhang¹,

Han²,

Ruan³

2020

Optica Applicata

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The static bias error angle obviously affects pre-pointing links’ stability in the presence of vibration in intersatellite laser communication. The 2nd order point-ahead angle is a source of misalignment which was ignored in most solutions, and this is the concern of our paper. In this study, we present a further analytical investigation into the point-ahead angle in complex satellite maneuvering environment. Static bias error angle induced by the 2nd order point-ahead angle has been studied under different intersatellite links. The probability density function of the pre-pointing links’ outage has been derived in the presence of pointing jitter taking consideration of the static bias angle, and the link budget has also been analyzed. Simulation model of link stability has been established to verify the numerical results by the Monte Carlo method in Matlab-Simulink environment. The results have shown that the 2nd order point-ahead angle has a significant detrimental impact on link stability in long distance links. It is a neglectable factor. This work is dedicated to intersatellite laser communication system design.

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“…Active disturbance rejection technology develops and enriches the essence of PID, the new practical technology eliminates error based on error, open up and use especial nonlinear-effects. Especially on those occasions that requires high-speed and high-precision control in the space environment, the ADRC technique shows its superiority even more [1][2][3][4][5][6][7][8] .…”

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confidence: 99%

Active disturbance rejection controller of fine tracking system for free space optical communication

et al. 2013

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Free space optical communication is one of the best approaches in future communications. Laser beam's acquisition, pointing and tracking are crucial technologies of free space optical communication. Fine tracking system is important component of APT (acquisition, pointing and tracking) system. It cooperates with the coarse pointing system in executing the APT mission. Satellite platform vibration and disturbance, which reduce received optical power, increase bit error rate and affect seriously the natural performance of laser communication. For the characteristic of satellite platform, an active disturbance rejection controller was designed to reduce the vibration and disturbance. There are three major contributions in the paper. Firstly, the effects of vibration on the inter satellite optical communications were analyzed, and the reasons and characters of vibration of the satellite platform were summarized. The amplitude-frequency response of a filter was designed according to the power spectral density of platform vibration of SILEX (Semiconductor Inter-satellite Laser Experiment), and then the signals of platform vibration were generated by filtering white Gaussian noise using the filter. Secondly, the fast steering mirror is a key component of the fine tracking system for optical communication. The mechanical design and model analysis was made to the tip/tilt mirror driven by the piezoelectric actuator and transmitted by the flexure hinge. The transfer function of the fast steering mirror, camera, D/A data acquisition card was established, and the theory model of transfer function of this system was further obtained.Finally, an active disturbance rejection control method is developed, multiple parallel extended state observers were designed for estimation of unknown dynamics and external disturbance, and the estimated states were used for nonlinear feedback control and compensation to improve system performance. The simulation results show that the designed controller not only accurately estimates and compensates the disturbances, but also realizes the robustness to estimation of unknown dynamics. The controller can satisfy the requirement of fine tracking accuracy for free space optical communication system.

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Pointing, acquisition, and tracking system of the European SILEX program: a major technological step for intersatellite optical communication

Cited by 13 publications

References 0 publications

Removal of orbital debris from low Earth orbit by laser-generated drag

Removal of orbital debris from low Earth orbit by laser-generated drag

Point-ahead analysis and pre-pointing link stability study of intersatellite laser communication

Active disturbance rejection controller of fine tracking system for free space optical communication

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