Thermal design and validation of radiation detector for the ChubuSat-2 micro-satellite with high-thermal-conductive graphite sheets

Park, Daeil; Miyata, Kikuko; Nagano, Hosei

doi:10.1016/j.actaastro.2017.03.030

Cited by 25 publications

(8 citation statements)

References 8 publications

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“…This design guarantees a long-term SAR image acquisition of 120 s, regardless of the left and right looking of the satellite. Furthermore, for the thermal design of high heat dissipation electronics such as batteries and power control unit, etc., a conductive thermal path between the electronics and the sidewall mounted radiator is implemented by using a relatively lighter thermal conduction material, namely, the so-called graphite sheet [32], instead of the conventional heat pipe [33]. Figure 9 shows the S-STEP system thermal control design concept.…”

Section: Thermo-mechanical Designmentioning

confidence: 99%

“…A satellite system-level structural analysis that considered launch and on-orbit environments was performed in order to validate the feasibility of the innovative thermo-me- This design guarantees a long-term SAR image acquisition of 120 s, regardless of the left and right looking of the satellite. Furthermore, for the thermal design of high heat dissipation electronics such as batteries and power control unit, etc., a conductive thermal path between the electronics and the sidewall mounted radiator is implemented by using a relatively lighter thermal conduction material, namely, the so-called graphite sheet [32], instead of the conventional heat pipe [33].…”

Section: Structural Analysis Overviewmentioning

confidence: 99%

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Innovative Mechanical Design Strategy for Actualizing 80 kg-Class X-Band Active SAR Small Satellite of S-STEP

et al. 2021

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The Small SAR Technology Experimental Project (S-STEP) mission aims to develop a new (space-based 80 kg-class active X-band synthetic aperture radar (SAR)) satellite with a main imaging mode of 1 m resolution stripmap. In the S-STEP mission, to achieve the design goal of developing faster, cheaper, better, and lighter small SAR satellite systems, innovative thermo-mechanical design approaches have been proposed and investigated. The major design approaches are the bus-payload integrated flat plate-type structure, multifunctional transmit/receive (TR) module, and dedicated vibration-free orbit deployer (VFOD) with the function of whole spacecraft vibration isolation. To validate the feasibility of the innovative mechanical design of S-STEP, a structural analysis considering launch and on-orbit environments is performed. In addition, development test results are presented to confirm the effectiveness of the proposed design approach for VFOD.

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Section: Thermo-mechanical Designmentioning

confidence: 99%

Section: Structural Analysis Overviewmentioning

confidence: 99%

Innovative Mechanical Design Strategy for Actualizing 80 kg-Class X-Band Active SAR Small Satellite of S-STEP

et al. 2021

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“…The thermal control solution using a graphite sheet could be more advantageous than the conventional heat pipe in terms of light weight and unnecessity to maintain the orientation to the horizontal plane of the pipe to avoid the gravitational effect during an on-ground test. A total of 15 graphite sheet layers, determined on the basis of a previous study [25], were applied with respect to each component. In the thermal design, the battery module is the only component requiring heater control for temperature management to maintain the electrical power storage capacity.…”

Section: New Thermal Design Strategy For S-stepmentioning

confidence: 99%

New Thermal Design Strategy to Achieve an 80-kg-Class Lightweight X-Band Active SAR Small Satellite S-STEP

Park¹,

Chae²,

Kim³

et al. 2021

Aerospace

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The main objective of the S-STEP (the Small Synthetic Aperture Radar (SAR) Technology Experimental Project (S-STEP)) mission is developing an 80-kg-class active X-band SAR observation small satellite. For lighter, smaller, better, and cheaper development of the S-STEP system, a new thermal design strategy is essential. Therefore, we proposed a new thermal design strategy in this study. The main features of the proposed thermal design involve the minimization of heater power consumption by optimizing environmental heat fluxes on the satellite, the provision of long-term SAR imaging duration in both right- and left-looking modes, and the use of a lightweight flexible graphite sheet as a thermal interface for some high-power instruments. These features contribute to minimizing the satellite’s mass budget through heater power minimization and achieving on-orbit system performance of S-STEP. The effectiveness of the proposed thermal design was numerically verified by on-orbit thermal analysis of the S-STEP system. In addition, the thermal design on a key payload component and the multifunctional transmit/receive module structure were verified through a space-simulated thermal vacuum test.

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“…It is covered by multilayer insulator (MLI) to avoid thermal input from surrounding bus instruments (see left panel of Figure 3). The RD is attached to +Y panel just behind the solar panel, and thermally coupled to the radiator which is made of carbon graphite sheets [9]. Due to such passive thermal control, the RD temperature is designed to kept as low as possible to reduce the thermal noise of the semi-conductor devices.…”

Section: Development and Performance Of The Rdmentioning

confidence: 99%

Solar Neutron and Gamma-ray Monitor for a Small Satellite

Yamaoka¹

2017

Proceedings of 35th International Cosmic Ray Conference — PoS(ICRC2017)

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Thermal design and validation of radiation detector for the ChubuSat-2 micro-satellite with high-thermal-conductive graphite sheets

Cited by 25 publications

References 8 publications

Innovative Mechanical Design Strategy for Actualizing 80 kg-Class X-Band Active SAR Small Satellite of S-STEP

Innovative Mechanical Design Strategy for Actualizing 80 kg-Class X-Band Active SAR Small Satellite of S-STEP

New Thermal Design Strategy to Achieve an 80-kg-Class Lightweight X-Band Active SAR Small Satellite S-STEP

Solar Neutron and Gamma-ray Monitor for a Small Satellite

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