Using Chebyshev polynomial interpolation to improve the computational efficiency of gravity models near an irregularly-shaped asteroid
文献类型：期刊论文
| 作者 | Hu, Shou-Cun1,2 ; Ji, Jiang-Hui1
|
| 刊名 | RESEARCH IN ASTRONOMY AND ASTROPHYSICS
 |
| 出版日期 | 2017-12-01 |
| 卷号 | 17期号:12页码:12 |
| ISSN号 | 1674-4527 |
| 关键词 | minor planets, asteroids: individual (4179 Toutatis) methods: numerical Chebyshev polynomials |
| DOI | 10.1088/1674-4527/17/12/120 |
| 通讯作者 | Ji, Jiang-Hui(jijh@pmo.ac.cn) |
| 英文摘要 | In asteroid rendezvous missions, the dynamical environment near an asteroid's surface should be made clear prior to launch of the mission. However, most asteroids have irregular shapes, which lower the efficiency of calculating their gravitational field by adopting the traditional polyhedral method. In this work, we propose a method to partition the space near an asteroid adaptively along three spherical coordinates and use Chebyshev polynomial interpolation to represent the gravitational acceleration in each cell. Moreover, we compare four different interpolation schemes to obtain the best precision with identical initial parameters. An error-adaptive octree division is combined to improve the interpolation precision near the surface. As an example, we take the typical irregularly-shaped near-Earth asteroid 4179 Toutatis to demonstrate the advantage of this method; as a result, we show that the efficiency can be increased by hundreds to thousands of times with our method. Our results indicate that this method can be applicable to other irregularly-shaped asteroids and can greatly improve the evaluation efficiency. |
| WOS关键词 | HARMONIC EXPANSIONS ; 4179 TOUTATIS |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| 出版者 | NATL ASTRONOMICAL OBSERVATORIES, CHIN ACAD SCIENCES |
| WOS记录号 | WOS:000419673300002 |
| 源URL | [http://libir.pmo.ac.cn/handle/332002/22184]  |
| 专题 | 中国科学院紫金山天文台 |
| 通讯作者 | Ji, Jiang-Hui |
| 作者单位 | 1.Chinese Acad Sci, Purple Mt Observ, CAS Key Lab Planetary Sci, Nanjing 210008, Jiangsu, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Hu, Shou-Cun,Ji, Jiang-Hui. Using Chebyshev polynomial interpolation to improve the computational efficiency of gravity models near an irregularly-shaped asteroid[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2017,17(12):12. |
| APA | Hu, Shou-Cun,&Ji, Jiang-Hui.(2017).Using Chebyshev polynomial interpolation to improve the computational efficiency of gravity models near an irregularly-shaped asteroid.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,17(12),12. |
| MLA | Hu, Shou-Cun,et al."Using Chebyshev polynomial interpolation to improve the computational efficiency of gravity models near an irregularly-shaped asteroid".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 17.12(2017):12. |
入库方式： OAI收割
来源：紫金山天文台
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