航天医学与医学工程

在地面环境中，通过紫外辐照对模拟月尘进行充电，可定量研究其在空间环境中的充放电规律。然而，由于真空和粉尘扰动等因素的影响，月尘的充放电过程难以通过接触方式实现精确测量。因此，本文基于振动电容原理，设计并构建了一套适用于真空环境的非接触式表面电位原位测量系统。该系统结合移动平均和计算标准差方法对数据进行筛选，并引入加权KNN算法对缺失或异常数据进行预测与补偿，从而提升了测量精度与稳定性。选取TYII-2和CLRS-1A两种模拟月尘样品，在紫外辐照条件下开展充放电实验，通过搭载振动电容传感器的原位运动机构实时获取表面电位分布情况。结果表明，不同粒径分布的样品在充电响应和耗散特性方面存在显著差异。

In ground-based experiments, ultraviolet irradiation is used to charge simulated lunar dust, aiming to quantitatively study its charging and discharging behavior in space environments. However, due to factors such as vacuum and dust disturbances, the charging and discharging processes of lunar dust are difficult to measure accurately through contact methods. Therefore, this paper designs and constructs a non-contact, in-situ surface potential measurement system based on the principle of vibrating capacitance, suitable for vacuum environments. The system combines moving average and standard deviation methods for data filtering and introduces a weighted KNN algorithm to predict and compensate for missing or anomalous data, thereby improving measurement accuracy and stability. Two typical simulated lunar dust samples, TYII-2 and CLRS-1A, were selected for charging and discharging experiments under ultraviolet irradiation. The surface potential distribution was obtained in real-time using an in-situ motion mechanism equipped with a vibrating capacitance sensor. The results show significant differences in the charging response and dissipation characteristics of the samples with different particle size distributions.