Summary
video system power supply (change pdb to buck, i am curious why we doing this but yea in the log)
why? Problem:
Video System is seeing a lot of noise induced when ESCs are under load
Options (not mutually exclusive)
Use a thicker wire to ensure low inductance and resistance to this device.
Add a common mode choke or inductor (and appropriate capacitors to avoid a resonance problem)
essentially add an input filter close to the OSD
Add more input capacitance
OSD board has very few input caps
Use a power supply placed further away from the ESCS
reduce noise coupling into the system
Move VTX system
If it’s on other side of drone away from ESCs that should help as well
Target next steps before saturday the 11th
Determine theoretical peak current into the video system
see arch doc for hardware datasheets
Ensure wires are appropriately sized, fix if not.
Solder more capacitors into the harness connection (cover in conformal coat)
test this at flight test to see if this solves. Then we can proceed to other options. Start simple.
Target steps before Saturday the 18th
wait to see if stuff before solves
add in common mode choke, design to ensure won’t saturate
verify capacitance is sufficient
Ishman Mann driving this with support from Daniel Puratich
Ishman got busy, Daniel Puratich added caps to osd and video mux and evaluated vtx input filter
tested at flight test and worked perfectly.
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Reviewers! | Mech: < list names > EE: < list names >Ishman Mann Daniel Puratich EFS: Anthony Luo Auto: < list names > Directors: < list names > |
Technical Details/Changelog
12V must be supplied to the VTX system off of a unique BEC, not using the PDB.
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Nathan Green to provide more context on why this is necessary. ← video looked poor when escs at high throttle.
EE to (hopefully) provide more context/clarity on 2024-04-22 Electronics Placement ← not gonna happen, see the physical drone, unfortunately team pre busy rn
Arch doc implementation Info
< where is your content going? What will be written? >
Approvals & Reviews
< space for reviewers to leave thoughts / approvals? >
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