Abeona

Design of low thrust transfers from Earth to Mars for SGAC's Small Satellite Project Group Mars Constellation

Installation

Go the folder where you want your project to be i.e. ~/Documents/MarsStudy and run:

git clone https://github.com/pmirallesr/Abeona
cd Abeona
conda config --add channels conda-forge
conda config --set channel_priority strict
conda env create -f environment.yaml
conda activate abeona
python -m transfer.pl2pl_optim --help

You should expect the following output:

usage: pl2pl_optim.py [-h] [--log_level LOG_LEVEL] [--mass MASS] [--thrust THRUST] [--isp ISP] [--model MODEL] [--mode MODE] [--list_modes] [--t0 T0 T0] [--tof TOF TOF]
                      [--vinf_dep VINF_DEP] [--vinf_arr VINF_ARR] [--nseg NSEG]

optional arguments:
  -h, --help            show this help message and exit
  --log_level LOG_LEVEL
                        Set to off, info, or debug to control verbosity

Spacecraft options:
  --mass MASS           Wet mass of the spacecraft upon TMI

Engine options:
  --thrust THRUST       Thrust during transfer
  --isp ISP             Specific impulse during transfer
  --model MODEL         Select a model amongst: ['BHT-1500']. Overrides thrust and isp settings
  --mode MODE           Engine mode during tranfer. Necessary only if a model was selected. 0 is the default mode
  --list_modes          List available modes for the selected model. Will do that instead of running program

Trajectory options:
  --t0 T0 T0            Start and end bound dates for the start of the trajectory. The optimization explores dates lying between the two.
  --tof TOF TOF         Start and end bound dates for the time of flight. The optimizationexplores times of flight lying between the two.
  --vinf_dep VINF_DEP   Allowed v infinity for Earth departure
  --vinf_arr VINF_ARR   Allowed v infinity for Mars arrival

Optimizer options:
  --nseg NSEG           Number of calculation segments

Folder structure:

• phasing, transfer, spiralling: Put files regarding these problems inside their respective folders
• mod_problems: There's one under phasing, transfer, and spiralling. Each of these hosts modified versions of pykep problems should you create any. e.g. direct_pl2pl_mod.py is an (unfinished) modification of pykep's direct_pl2pl algo that changes the objective function and adds a few constraints
• Runs: There's one under phasing, transfer, and spiralling. Use them to store simulation outputs. Keep it tidy!
• data: Hosts diverse data that might be useful. Right now only hosts a yaml file with EP thruster data
• utils: Hosts tools that can be useful across the repo. date_utils include tools for transforming from the mjd2000 format to normal human-readable dates and back.