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http://dx.doi.org/10.5139/JKSAS.2020.48.6.455

On-orbit Thermal Analysis for Verification of Thermal Design of 6 U Nano-Satellite with Multiple Payloads  

Kim, Ji-Seok (Department of Aerospace System Engineering, University of Science & Technology)
Kim, Hui-Kyung (Department of Aerospace System Engineering, University of Science & Technology)
Kim, Min-Ki (Korea Aerospace Research Institute)
Kim, Hae-Dong (Department of Aerospace System Engineering, University of Science & Technology)
Publication Information
Journal of the Korean Society for Aeronautical & Space Sciences / v.48, no.6, 2020 , pp. 455-466 More about this Journal
Abstract
In this study, we built a thermal model for SNIPE 6U nano-satellite which has scientific mission for measuring science data in near Earth space environment and described thermal design based on the thermal model. And the validity of the thermal design was verified through the on-orbit thermal analysis. The thermal design was carried out mainly on the passive thermal control techniques such as surface finishes, insulators, and thermal conductors in consideration of the characteristics of the nano-satellite. However, the components with narrow operating temperature range and directly exposed to the orbital thermal environments, such as a battery and thrusters, are accomodated with heaters to satisfy the temperature requirements. On-orbit thermal analysis conditions are based on the basic orbital conditions of the satellite, and thermal analysis was performed for Normal mode, Launch & Early Orbit Phase (LEOP), Safehold mode, and Maneuver mode which are classified by the power consumption and the attitude of the satellite according to the mission scenario. The analysis results for each mode confirmed that every component satisfies the temperature requirement. In addition, the heater capacity and duty cycle of the battery and thruster were calculated through the analysis results of the Safehold mode.
Keywords
Nano-Satellite; Thermal Design and Analysis; Thermal Control Subsystem; Duty Cycle;
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