Data supporting the MSc thesis: The Design and Automation of a TVAC Testbed to Simulate LEO-to-VLEO Mission Profiles

<strong>This repository contains the MATLAB and LabVIEW code developed for the MSc thesis "The Design and Automation of a TVAC Testbed to Simulate LEO-to-VLEO Mission Profiles".</strong><br>The MATLAB code consists of three programs. The first is a standalone CubeSat aerothermal heating model, used for first-order heat flux estimation and validation against literature cases. The second is the full LEO-to-VLEO thermal environment model, which combines Keplerian orbit propagation, NRLMSISE-00 atmospheric modelling, aerothermal heating, and solar, albedo, and Earth IR fluxes exported from the MATLAB CubeSat Thermal Power Toolbox (Mattos, 2023). This model generates time-dependent orbital states, atmospheric properties, thermal loads, and equivalent infrared power requirements for reproduction in a thermal vacuum chamber. The third program performs a sensitivity analysis of the aerothermal model, evaluating the influence of altitude, velocity, geographic location, season, UTC time, solar activity, and geomagnetic activity on the predicted heat flux.<br>The LabVIEW code is provided as a complete automation project for the modified VLEO thermal vacuum chamber. The application is based on the LabVIEW Continuous Measurement and Logging example project using a Queued Message Handler architecture. The main application is launched through Main.vi. It provides centralised monitoring, control, data acquisition, logging, manual and automatic profile execution, and safety handling for the Huber Unistat 815, Julabo Presto A40, Yokogawa GM10, and the three TTi QL355TP power supplies used to control the infrared emitter zones.<br>The code was developed for a specific experimental setup at DLR RSC3/RSTEC. It is intended for research traceability, review, and potential reuse in similar first-order aerothermal modelling or TVAC automation work. The MATLAB models should be treated as first-order analytical models. The LabVIEW project should not be used with other TVAC or high-power infrared systems without independent hardware verification and safety validation.

**本仓库包含为硕士学位论文《模拟近地轨道（LEO）至甚低轨道（VLEO）任务剖面的热真空（TVAC）试验台设计与自动化》**开发的MATLAB与LabVIEW代码。

本次提供的MATLAB代码共包含三个程序模块。第一个为独立式立方星（CubeSat）气动热加热模型，用于一阶热流估算，并可与已发表的案例进行验证对比。第二个为完整的近地轨道至甚低轨道热环境模型，该模型整合了开普勒轨道传播、NRLMSISE-00大气模型、气动热加热，以及从MATLAB立方星热功率工具箱（Mattos, 2023）导出的太阳辐照、反照率与地球红外（IR）通量。该模型可生成随时间变化的轨道状态、大气参数、热载荷，以及热真空试验台复现所需的等效红外功率需求。第三个程序用于开展气动热模型的敏感性分析，评估海拔高度、飞行速度、地理位置、季节、协调世界时（UTC）、太阳活动与地磁活动对预测热流的影响。

本次提供的LabVIEW代码为一套完整的自动化项目，用于改造后的甚低轨道热真空试验台。该应用基于LabVIEW官方的“连续测量与记录”示例项目，采用队列消息处理器（Queued Message Handler）架构，主程序通过Main.vi启动。该应用可实现集中式监控、设备控制、数据采集、日志记录、手动与自动剖面运行，以及针对Huber Unistat 815、Julabo Presto A40、横河（Yokogawa）GM10，以及三台用于控制红外发射区的TTi QL355TP电源的安全防护功能。

本代码为德国航空航天中心（DLR）RSC3/RSTEC的特定实验装置开发，旨在保障研究可追溯性、便于同行评审，并可在同类一阶气动热建模或热真空试验台自动化工作中复用。本MATLAB模型仅可作为一阶解析模型使用。未经独立硬件验证与安全校验，不得将本LabVIEW项目应用于其他热真空试验台或大功率红外系统。