基于触月压痕的表层月壤力学状态试验分析  

Experimental analysis of mechanical properties of surface lunar soil based on lunar indentation

作　　者：薛龙[1] 姚猛[2] 李立犇 李因武 邓湘金[2] 李建桥 邹猛 XUE Long;YAO Meng;LI Li-ben;LI Yin-wu;DENG Xiang-jin;LI Jian-qiao;ZOU Meng(Key Lab of Modern Agricultural Equipment,Jiangxi Agricultural University,Nanchang 330045,China;Beijing Institute of Spacecraft System Engineering,China Academy of Space Technology,Beijing 100094,China;Key Laboratory of Bionic Engineering,Ministry of Education,Jilin University,Changchun 130022,China)

机构地区：[1]江西农业大学江西省现代农业装备重点实验室,南昌330045 [2]中国空间技术研究院北京空间飞行器总体设计部,北京100094 [3]吉林大学工程仿生教育部重点实验室,长春130022

出　　处：《吉林大学学报（工学版）》2022年第3期497-503,共7页Journal of Jilin University:Engineering and Technology Edition

基　　金：国家自然科学基金项目(51865018,51775233);中国空间技术研究院预研项目(5010120160759);江西省自然科学基金项目(20192BAB206025)。

摘　　要：以触月传感器触月压痕为研究对象,通过压痕的几何特征参数和触月压力,结合最小二乘法建立了采样区域表层月壤的承压模型,确定了表层月壤的软硬程度。应用3种模拟月壤(CE5_1、CE5_2、CE5_3),以相对密实度为依据,把模拟月壤整备为松软、中密和高密3种状态。共采集试验数据264组,每种模拟月壤的试验数据按照3∶2的比例随机划分为建模组和预测组。预测组中预测正应力与实际正应力的相关系数分别为0.985、0.965和0.971。结果表明,该模型可以对表层月壤的承压能力进行评估,用于判别表层月壤的软硬程度,为表取采样深度的确定提供参考。Based on the indentation,geometric parameters(surface area and depth) obtained by stereo camera were used to identify pressure-sinkage model coefficient combined with least square method. Three kinds of lunar soil simulant(CE5_1,CE5_2 and CE5_3) were used in these studies and each kind of simulant was prepared based on bulk density for three states(soft,normal and hard). There were 264 data including 96 data of CE5_1,36 data of CE5_2 and 36 data of CE5_3. The data of each kinds of simulant was randomized in two data set according to the ratio of 3∶2,one was calibration data set,the other was prediction data set. Based on the pressure-sinkage model coefficient obtained by calibration data set,the accuracy of prediction data set of CE5_1,CE5_2 and CE5_3 were 0.985,0.965 and 0.971,respectively.The results show that this pressure-sinkage model can be used to provide numerical reference to determine the extent of soft and hard lunar surface which can provide reference for excavation depth of lunar regolith sampler.

关 键 词：地面力学 表取采样 月壤 承压特性 

分 类 号：TB17[生物学—生物工程] TU41[建筑科学—岩土工程]