标题： ChaSTE实验中Chandayaan-3着陆器前端电子设备的表征 显示英文标题

标题： Characterisation of Front-End Electronics of ChaSTE experiment onboard Chandayaan-3 lander

摘要： 月球表面热物理实验（ChaSTE）是“月船三号”着陆器搭载的有效载荷之一。 该实验的目标是通过部署一个热探针，对月球表面最外层100毫米的热行为进行原位研究。 探针由10个温度传感器（铂电阻温度计）组成，这些传感器安装在探针不同长度位置，用于测量月壤温度随深度的变化。 探针上还装有一个加热器，用于测量热导率。 ChaSTE的机载电子设备分为两部分：前端电子设备（FEE）和处理电子设备（PE）。 前端电子设备（FEE）卡负责执行必要的传感器信号调理，包括激励RTD传感器、获取模拟电压，然后使用模数转换器（ADC）将采集到的模拟信号转换为数字信号。 前端卡进一步与处理电子卡接口，用于数字处理和航天器接口。ChaSTE前端电子设备的校准、表征和功能测试活动旨在测试和确保其正常功能和性能。进行了涉及电子偏移校正和温度校准的两阶段校准过程。 所有这些活动都成功完成，它们的结果为我们提供了对FEE在不同热学和电气条件下以及在实际ChaSTE实验模拟条件下的行为的良好理解。 ChaSTE前端电子设备的性能完全在设计范围内，在模拟的月球环境中表现符合预期。 这些活动的数据有助于解释ChaSTE的实际科学数据。 显示英文摘要

摘要： Chandra Surface Thermophysical Experiment (ChaSTE) is one of the payloads flown onboard the Chandrayaan-3 lander. The objective of the experiment is in-situ investigation of thermal behaviour of outermost 100 mm layer of the lunar surface by deploying a thermal probe. The probe consists of 10 temperature sensors (Platinum RTDs) mounted at different locations along the length of the probe to measure lunar soil temperatures as a function of depth. A heater is also mounted on the probe for thermal conductivity measurements. The onboard electronics of ChaSTE has two parts, Front-End Electronics (FEE) and processing electronics (PE). The front-end electronics (FEE) card is responsible for carrying out necessary sensor signal conditioning,which includes exciting the RTD sensors,acquiring analog voltages and then converting the acquired analog signals to digital signals using an Analog to Digital Converter(ADC). The front-end card is further interfaced with the processing electronics card for digital processing and spacecraft interface.The calibration, characterisation and functional test activities of Front-End Electronics of ChaSTE were carried out with the objective of testing and ensuring proper functionality and performance.A two phase calibration process involving electronic offset correction and temperature calibration were carried out. All these activities were successfully completed and the results from them provided us with a really good understanding of the behaviour of the FEE under different thermal and electrical conditions as well as when subjected to the simulated conditions of the actual ChaSTE experiment. The performance of the ChaSTE front-end electronics was very much within the design margins and its behaviour in simulated lunar environment was as desired. The data from these activities is useful in the interpretation of the actual science data of ChaSTE.