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A novel design and thermal analysis of micro solar sails for solar sailing with chip scale spacecraft

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Abstract

The past few decades have seen many meaningful trials on development of solar sail spacecraft with high area-to-mass ratios and thus allowing efficient, propellant-free photon propulsion. However, the restriction to bending stiffness of thin solar films has proven to be an obstacle for building solar sails with high area-to-mass ratios. This paper presents a novel design of micro solar sails for emerging lightweight chip scale spacecraft based on flexible electronics. A representative concept design of the chip scale solar sail spacecraft with area-to-mass ratios over 100 m2/kg is proposed, which enables efficient orbital transfer and attitude adjustment. To acquire large deformation for adjustment of forces, the micro solar sails consisting of bilayer beams are actuated by Joule heating. Electro-thermal analysis on the sails after deployed into space should be the prioritized and fundamental problem for following evaluation of deflection and thus change of solar radiation pressure on the reflective sails. Solar radiation, thermal reemission, and Joule heating are incorporated into the electro-thermal model for such solar sails deployed in geospace. A nonlinear second order differential equation is derived, which is solved numerically for temperature distribution across the sail. The proposed electro-thermal model is validated by finite element analysis and lays a solid foundation for the thermo-mechanical modelling, as well as flight modelling, of the chip scale spacecraft with such micro solar sails.

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Acknowledgements

The National Natural Science Foundation of China (No. 11572248) and China Scholarship Council have in part supported the research. The research was in part carried out at the Center for Functional Nanomaterials (CFN), Brookhaven National Laboratory (BNL), which is supported by the U.S. Department of Energy, Office of Basic Energy Sciences, under Contract No. DE-SC0012704. The authors would like to thank Dr. Ming Lu, Dr. Chang-Yong Nam, Dr. Fernando Camino, Dr. Tong Xiao, Dr. Samuel A. Tenney, and Ms. Gwen Wright for helping finish the materials characterization and experimental tests in CFN. In addition, we would like to give very special thanks to Dr. Sundeep Mangla from Downstate Medical Center, State University of New York, Mr. Robert Bauer, and Mr. Yang Xu from Stevens Institute of Technology.

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Correspondence to Zhongjing Ren, Jianping Yuan or Yong Shi.

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Ren, Z., Yuan, J., Su, X. et al. A novel design and thermal analysis of micro solar sails for solar sailing with chip scale spacecraft. Microsyst Technol 27, 2615–2622 (2021). https://doi.org/10.1007/s00542-020-05094-z

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  • DOI: https://doi.org/10.1007/s00542-020-05094-z

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