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Summary

  • 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

  • Next steps

    • 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.

  • Ishman Mann driving this with support from Daniel Puratich

Date

Status

DRAFT / SUBMITTED / APPROVED / REJECTED

Change Requestee

Nathan Green

Reviewers!

Mech: < list names >

EE: 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.

Nathan Green to provide more context on why this is necessary.

EE to (hopefully) provide more context/clarity on 2024-04-22 Electronics Placement

Arch doc implementation Info

< where is your content going? What will be written? >

Approvals & Reviews

< space for reviewers to leave thoughts / approvals? >

Name

Approve/Deny?

Reason

 

 

 

 

 

 

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