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碎石堆构造小行星表面地形分析与仿真验证
王亚林1,2, 刘鹏1, 吴辉阳1, 黎衡1, 赵巍1
1.哈尔滨工业大学 计算机科学与技术学院, 哈尔滨 150001;2.中国人民解放军 63861部队, 白城 137001
摘要:
人类迄今对太阳系小天体开展的探测包括地基、天基远距离观测和“罗塞塔号”“隼鸟号”等探测器的抵近观测、着陆取样等。对具有碎石堆构造特性的小行星表面地形特性进行研究,提出了一种生成小行星表面地形仿真模型的方法,建立石块生成模型,对影响地形构造的石块幂律分布规律进行实验模拟。根据小天体着陆段导航方法验证及表面操作执行机构验证需要,选择并仿真生成了5种典型地形。实验结果表明:按照本文方法生成的仿真地形与实际探测得到的小行星表面局部地形相比一致性较好,可用于近操作任务中的着陆机构验证和地形相对导航算法初步验证。
关键词:  碎石堆小行星;表面地形仿真;石块模型;幂律分布
DOI:10.15982/j.issn.2095-7777.2019.05.009
分类号:P185.7
基金项目:空间光电测量与感知实验室开放基金(LabSOMP-2018-01)
Terrain Analysis and Simulation Verification on Rubble-Pile-Constructed Asteroid Surfaces
WANG Yalin1,2, LIU Peng1, WU Huiyang1, LI Heng1, ZHAO Wei1
1.School of Computer Science and Technology, Harbin Institute of Technology, Harbin 150001, China;2.Unit 63861 of PLA, Baicheng 137001, China
Abstract:
Solar system small body exploration involves ground-/space-based long-distance observation, proximity observation, landing, sample return, etc. The topography characteristics of asteroid surface are studied and a simulation model to describe asteroid surface terrains with various sizes of boulder following the Power Law distributionis proposed in this paper. Five terrains cases are selected and simulated according to the requirement of proximity operation method/actuator verifications under the specific topographic structure limitations. Results show that simulated terrains havegood agreement with asteroid terrains images, by which the proximity operation verifications, such as landing mechanism and terrain relative navigation algorithms, could be done in preliminary.
Key words:  ruble pile asteroid;surfaces terrain simulation;boulder model;Power Law distribution