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| Lunar Soil In-situ Forming Technology Based on Analysis of Sintering Temperature Rising Characteristics with Laser Irradiation |
| Received:September 28, 2019 Revised:November 07, 2019 |
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| DOI：10.7643/issn.1672-9242.2020.03.011 |
| KeyWord:space resource utilization in-situ lunar soil forming laser sintering modeling technical proposal |
| Author | Institution |
| WANG Zhi-hao |
Beijing Institute of Spacecraft Environment Engineering, Beijing , China |
| MA Zi-liang |
Beijing Institute of Spacecraft Environment Engineering, Beijing , China |
| TIAN Dong-bo |
Beijing Institute of Spacecraft Environment Engineering, Beijing , China |
| LIU Yu-ming |
Beijing Institute of Spacecraft Environment Engineering, Beijing , China |
| YU Qiang |
Beijing Institute of Spacecraft Environment Engineering, Beijing , China |
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| Abstract: |
| The work aims to analyze the characteristics and schemes of in-situ forming of lunar soil with laser sintering technology, and provide reference for engineering design and analysis of in-situ forming of lunar soil. The comparative analysis on the advantages of technical schemes of laser sintering was conducted based on the technological path of in-situ forming of lunar soil at home and abroad. The law of heating temperature changing with laser output power, lunar soil particle size, focus spot diameter and laser scanning speed was analyzed with the heating model of multi-layered lunar soil particles under laser irradiation. Based on the "monument" forming task, a laser sintering scheme based on closed sintering chamber and feeding mobile mechanism was proposed. The advantages of technical scheme of laser sintering were excellent performance and high accuracy of the forming body, no need to add auxiliary materials, non-contact type, easy operation and control, and acceptable energy consumption and volume. The temperature of the lunar soil particles depended on the radiation energy that could be received. Whether the temperature was to increase the laser output power or to reduce the spot diameter, the density of radiation energy received by the particles could be enhanced. If the scanning speed was reduced, the time for the particles to receive radiation energy would increase, while the particle size of lunar soil would decrease. As the relationship between particle mass and particle size was cubic, the radiation energy received by a single particle could also be increased. Laser sintering system consisted of control device, laser source, replenishment device, mobile device and power supply. Based on the preliminary analysis and calculation, the recommended energy consumption of the system was about 300 W, the spot diameter was 50 um, and the forming efficiency was about 38 g/h. In-situ forming technology of lunar soil based on laser sintering technology has certain advantages. It is suggested to adopt the technical strategies featured by low power, small spot and low scanning speed, and the preliminary estimated technical indicators can be realized in engineering. |
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