微纳卫星总剂量评估优化

佘璇; 楼海君; 宋仁庭; 李琪聪; 金仲和

doi:10.13700/j.bh.1001-5965.2022.0331

微纳卫星总剂量评估优化

doi: 10.13700/j.bh.1001-5965.2022.0331

佘璇¹,
楼海君^{1, 2, ,},
宋仁庭³,
李琪聪^{1, 4},
金仲和¹

1.
浙江大学航空航天学院，杭州 310013
2.
杭州电子科技大学电子信息学院，杭州 310018
3.
西安卫星测控中心，西安 710043
4.
浙江大学浙江省软体机器人与智能器件研究重点实验室，杭州 310013

详细信息

通讯作者:
E-mail：louhj04@zju.edu.cn

中图分类号: O571.33
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出版历程
- 收稿日期: 2022-05-07
- 录用日期: 2022-08-07
- 网络出版日期: 2022-08-29
- 整期出版日期: 2024-03-27

Optimization of TID assessment of micro-satellites

SHE Xuan¹,
LOU Haijun^{1, 2
, ,},
SONG Renting³,
LI Qicong^{1, 4},
JIN Zhonghe¹

1.
School of Aeronautics and Astronautics，Zhejiang University，Hangzhou 310013，China
2.
School of Electronics and Information Engineering，Hangzhou Dianzi University，Hangzhou 310018，China
3.
Xi’an Satellite Control Center，Xi’an 710043，China
4.
Key Laboratory of Soft Machines and Smart Devices of Zhejiang Province，Zhejiang University，Hangzhou 310013，China

More Information

Corresponding author: E-mail：louhj04@zju.edu.cn

摘要

摘要:
针对微纳卫星在空间环境中遇到的总剂量(TID)效应，为更加准确地评估卫星内敏感点的剂量值，基于正二十面体的几何划分方法改进了传统的空间网格划分，宏观计算并验证了粒子透过材料的衰减，实现扇形角等效评估优化。围绕计算准确度和效率，构建形状模型进行比较验证，通过与优化等立体角划分法、正八面体划分法的比较，表明该方法更加稳定高效，计算速度可提高6.4%，更适合评估复杂形状模型。基于改进的三维总剂量评估方法，对形状模型进行针对性总剂量防护，防护效果相较于无差别防护可提高255.1%。研究成果可有效提高微纳卫星总剂量评估效率，保障星内敏感器件在任务周期内的可靠运行，为微纳卫星总剂量防护提供重要参考。
- 微纳卫星 /
- 空间辐射 /
- 辐射防护 /
- 总剂量 /
- 网格划分法
Abstract:
Targeting the total ionizing dose (TID) effects that micro-satellites experience in space, the traditional spatial mesh division is improved based on the icosahedral space grid method in order to more accurately evaluate the TID of sensitive points in the satellite, realize the optimization of the equivalent evaluation of the sector shielding, and calculate and verify the attenuation of particles through the material macroscopically. Around the calculation accuracy and efficiency, shape models are built for comparison and verification. This approach is more stable and efficient than the optimized equal solid angle partitioning method and the normal octahedron partitioning method. Its calculation speed may be enhanced by 6.4%, making it more appropriate for analyzing complicated shape models. Based on an improved three-dimensional TID evaluation method, targeted TID protection is provided to the shape model, and the protective effect can be increased by 255.1% compared with indiscriminate protection. This method can effectively improve the efficiency of TID evaluation of microsatellites, ensure the reliable operation of sensitive devices in the satellite during the mission period, and provide an important reference for TID protection of microsatellites.
- micro-satellites /
- space radiation /
- radiation protection /
- total ionizing dose /
- meshing method

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图 1 粒子传输方式

Figure 1. Particle transportation method

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图 2 三维总剂量评估流程

Figure 2. Three-dimensional TID assessment process

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图 3 剂量-深度曲线

Figure 3. Dose-depth curves

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图 4 三维形状模型

Figure 4. Three-dimensional shape model

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图 5 总剂量计算

Figure 5. TID calculation

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图 6 模型d的剂量分布

Figure 6. Dose distribution of model d

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图 7 模型d的总剂量计算

Figure 7. TID calculation of model d

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图 8 总剂量计算时间

Figure 8. TID calculation time

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图 9 平均每根射线计算时间

Figure 9. Average calculation time per ray

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图 10 三维剂量分布

Figure 10. Three-dimensional dose distribution

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图 11 针对性加固

Figure 11. Targeted reinforcement

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图 12 加固后的剂量分布

Figure 12. Dose distribution after reinforcement

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