Parallelized Satellite Thermal Analysis System

This is the code repository of AGNI B3V. For install instructions, user/technical manuals and benchmarks visit the website: https://agnib3v.github.io/

Introduction

Agni B3V is an all encompassing solution for modeling, simulating and interpreting thermal phenomena affecting satellites in circular orbits and sun pointing aptitudes. It currently includes tools capable of:

• Building satellite structure meshes through primitives union or individual node placement and connection.
• Automatically remeshing models to improve FEM results.
• Assigning different materials and conditions to separate parts of the model.
• Configuring desired orbit and constants such as earth ir emission, albedo and sun intensity.
• Estimating view factors and energy exchange between elements and between elements and other celestial bodies.
• Simulating second by second temperature modification in an specified interval of time and orbit.
• Postprocessing results and extracting relevant data and graphs.

Authors

This system was developed in the context of the professional task for "Universidad de Buenos Aires" by:

Barreneche Franco ([email protected])

Belinche Gianluca ([email protected])

Botta Guido ([email protected])

Ventura Julian ([email protected])

Building from source

A convenient installer is provided in the user manual.

Alternatively, each tool install and basic usage is described in its respective folders README.

It is possible to install all required python modules from the root folder:

pip install -r requirements.txt

To be able to access all functions from the user GUI, install third party software as described in the following section.

Installing third party software

All commands must be run from the root folder.

FreeCAD + Agni Workbench

Install FreeCAD

curl -L -o FreeCAD 'https://github.com/FreeCAD/FreeCAD/releases/download/0.21.1/FreeCAD_0.21.1-Linux-x86_64.AppImage'
chmod +x FreeCAD
mkdir _FreeCAD
mv FreeCAD ./_FreeCAD
mv _FreeCAD FreeCAD

Install Gmsh

curl -L -o gmsh.tgz "https://gmsh.info/bin/Linux/gmsh-4.12.0-Linux64.tgz"
tar -xf gmsh.tgz
sudo mv -f gmsh-4.12.0-Linux64/bin/gmsh /usr/bin 
rm -rf gmsh-4.12.0-Linux64
rm -rf gmsh.tgz

Install Agni Workbench

Install for the current user:

export FREECAD_DIRECTORY="~/.local/share/FreeCAD"
mkdir -p "${FREECAD_DIRECTORY}/Mod"
cp -r "freecad/Agni" "${FREECAD_DIRECTORY}/Mod/Agni"

Install to run with sudo privileges:

export FREECAD_DIRECTORY="/root/.local/share/FreeCAD"
sudo mkdir -p "${FREECAD_DIRECTORY}/Mod"
sudo cp -r "freecad/Agni" "${FREECAD_DIRECTORY}/Mod/Agni"

GMAT

curl -L -o gmat.tar.gz "https://sourceforge.net/projects/gmat/files/GMAT/GMAT-R2022a/gmat-ubuntu-x64-R2022a.tar.gz/download"
tar -xf gmat.tar.gz
rm -rf gmat.tar.gz

Paraview

curl -L -o paraview.tar.gz "https://www.paraview.org/paraview-downloads/download.php?submit=Download&version=v5.12&type=binary&os=Linux&downloadFile=ParaView-5.12.0-RC1-MPI-Linux-Python3.10-x86_64.tar.gz"
tar -xf paraview.tar.gz
mv ParaView*x86_64 ParaView
rm -rf paraview.tar.gz