基于模拟月壤的表层采样试验研究

Experimental Research on Surface Sampling Based on Lunar Soil Simulants

摘要:

目前月球采样可分为深层采样和表层采样，作为深层采样的有力补充，国内外针对表层采样研发了多种不同类型的采样机具，但对机具和月壤相互作用鲜有研究。针对月球表层采样设计了2套采样机具，能够实现挖取、铲取、夹取和振动贯入4种动作。通过相应的传感器，采样机具能在运动过程中实时检测机具承受的力矩（力）。利用6种不同性质的模拟月壤，用2套采样机具分别就不同的运动参数进行了相关试验。通过对试验现象的观察可知模拟月壤与常规沙土性质不同，会出现特定的表现；通过对试验数据的分析可知，除挖取动作外其余3种动作机具运动与受力的关系为近似线性关系，而挖取动作机具承受扭矩分为4个阶段，与机具运动位置有关。

Abstract:

Lunar sampling consists of deep sampling and surface sampling. As a powerful supplement for deep sampling, multiple sampling tools are designed for surface sampling, however little research is focus on the interaction between sampling tool and lunar soil. Two simulated sampling tools, which could implement four actions (including digging, shoveling, clipping and penetration with vibration), were designed for surface sampling in this paper. By using the corresponding sensors, the torque (or force) acting on sampling tools can be monitored in real-time. The experiments were made on different motion parameters by use of six different lunar soil simulants and two sets of sampling equipments. Based on the observation during the experiments, specific phenomena appeared due to the different properties of lunar soil simulants and usual sand; and according to the analysis on experiments data, it is showed that excepting digging action, the relationship between the implement movements by the rest three actions and the force is an approximate linear one, while the torque on the implement of digging action is divided into 4 stages depending on the implement movement position.