Misc stuff about paraglider logger
- Exploring data-loggers possibilities for an application in the EN flight test norm.
- Testing and judging the reliabilyty of the dataloggers , and assess theirs adavantges and their limits.
- Collect datas in view to propose criteria for the norm.
- battery and power board
- plastic case
- pitot tube (if needed)
- keyboard (or input method , to tag specific manoeuvre in the log and to discard the badly executed ones)
- telemetry (if needed? to send live data to ground.)
Validations indoor: Before going in the air some points needed to be validate to trust the recorded data.
feature validation method description Quaternions - pitch, roll pendulum Overlaying a animation based on data and a video recording the experience. Quaternions - yaw Slow rotating table Overlaying a animation based on data and a video recording the experience. Horizon level stability Fast rotating table Check that the artificial horizon is not tilted under rotation acceleration. Sync GPS between devices shock table Needed to link data from pilot and wing. Position-orientation reconstruction - Reconstruction of the travel and orientation on the screen. Sync with camera - Check the possibility to sync the data with video recording (using camera with gps), useful to debug in air.
Validation in the air: Before trusting the data for interpreting the manoeuvre, we need to confirm different points, to be sure we recorded the good stuff.
feature validation method description Position in the harness ? Check the best placement in the harness for IMU measurement and the GPS reception. Position in the glider ? Check the sensibility to glider deformation. Number of devices ? Check if two device are really needed.
Possible outputs: Here a list of possible pertinent output, that should be tested for their revelancy .
- From simple measure
- g force 
- altitude lost [m]
- recovery time [s]
- speed ( need pitot) [m/s]
- Medium one:
- course change [°]
- sink rate at point [m/s]
- g force at point 
- to hard one
- angle [°]
- angle speed [°/s]
- angle acceleration [°/s2]
- angle jerk [°/s3]
- From simple measure
5. final specs
Working on :
- Linux Mint : 18.3 - 19.1
- python : 3.7
- anaconda : 4.7.11
Setting up the python env
conda create --name paralogger conda install -n paralogger pip conda install --name paralogger pylint conda cativate paralogger conda install -c conda-forge pyulog conda install pandas conda install -c bokeh bokeh conda install -c anaconda scipy conda install -c conda-forge matplotlib
Misc ( to run PX4 preview):
conda install -c conda-forge pyfftw conda install -c conda-forge simplekml conda install -c mikesilva smopy
conda list -n paralogger
Organisation of the code
So far just a bunch of scripts.
More infos will be shared, better it will be.
So far this repo issues section will be used and the significant info/progress will be collected in this repo wiki.