Page Comparison

• Try and get as many people in the room as possible.

Frame updates

• Starting on landing gear prints

• MCMaster Carr order for standoff stuff & miscellaneous items.

• Talking to Les (machinist). Will likely have to do a lot of this ourselves and then send it off to him to finish (battlebots causing issues).

Sensor Updates 📏

• RTK GPS? Has antenna and control box.

  • One M9N, one RTK.

  • Mechanically identical, mounting pattern is the same.

  • will remain on posts (similar to vanny, except further).

RF updates 🌐

• Need notch filters? 5W video very much stepping on other freqs? not sure…. currently investigating

• Could get SDRPlays. (RSP1A → to be acquired)- Carbon fiber panel mfg this morning

  • Panels are done

  • Can be done on the router! No queue for the router, so should be fast

• 3D printing is coming along

• The middle aluminum block is done

• Jigs on the way

• Priority for 1 drone, 2nd drone will be done either in parallel if convenient or soon after 1st one

  • Plan is not to wait and see how the 1st drone works, we just move forward with the design

  • Aidan: we should test before committing to 2 copycat drones (for cost)

  • better to have 2nd copy even if not fully optimized - most components at least will be salvageable even if some things need to change

  • most of it is low cost… so probably ok

Image Added

middle alu block!!!!

• LEDs

• Airframe should be ready before comp starts

• We should sleep early

Sensor Updates 📏

• Two M9N better redundancy with same accuracy.

  • therefore we can do what we want

  • using 2 M9Ns means we also get a redundant compass

• Will re-test RTK accuracy with tuned position hold & optical flow.

• Compass can’t be calibrated due to wires on Vanny in the way

• Vibration graphs from vanny are not great

• probably vanny airframe specific

• did run autotune - jitter, from either bad vibration, tuning…. frame flex..?

RF updates 🌐

• Spectrum analyzer???

Motor 3-phase connectors ✅

• 3-phase connectors decided:

  MT-30 for inner-hub-to-tube connector

  https://www.tme.com/ca/en/details/mt30-m/dc-power-connectors/amass/

  3.5mm Bullet for end of tube - motor connector.

  https://www.amazon.ca/Pairs-3-5mm-Female-Bullet-Connector/dp/B089DZ66J1/ref=sr_1_1?keywords=3+5mm+bullet+connectors&qid=1689020675&s=electronics&sprefix=3.5mm+bull%2Celectronics%2C94&sr=1-1

  Found plenty of bullet connectors in the bay

  • Seems like we have enough, is there a reason why we can’t use the ones in a connector box on the EE shelf?

  • should figure out how many bullet connectors we want

  • use triangle ones as decided (MR30s.. MT30s?)

  • pick the most serviceable and reparable

  • bullet connectors between ESC-3phase + more stuff Anthony Luo to clarify :|

  • Order soon! Order 2 weeks ago 😧 😟 🫠

• EE still needs to source Motor/ESC wire

  • Should be a small task

  • Light wire

  • COPPER 🔸

  • sheaths that don’t melt : /

  • data cables that aren’t too thick

  • different colors/color standard

  • twisting wires?

Battery PDB Distribution

• How are batteries going to be arranged in series/parallel?

  • Scuffed diagram that needs explanation of potential implementation for three 12S batteries

  • Image Removed

• How will our board support this layout?

• Thoughts:

• 2 PM02D’s (2 banks of batteries), parallel after. Potentially on either side of the battery.

Junction point closer to the edge of the board (away from the pixhawk).

Do we have two PM02Ds in the bay? - yes Do Not Break ❌ 6-12S voltage

• If so, electrical member needs to test the current sharing capability of the power modules to see if we can get even current draw from each power module

• Potentially borrow E-Load from Midnight sun

Airside Electrical Layout

• Where each component goes needs to be added to the architecture document.

Need selection of proper wire gauges, types, etc.

https://www.engineeringtoolbox.com/wire-gauges-d_419.html

• For Battery connections, 8 AWG can be used to handle 75A continuous (maybe a little lower if stranded)

  • Stranded likely needed in order to have the required flexibility

  • Two power modules in parallel, two banks of batteries in parallel.

• For motor connections, each motor draws around 15A (determined when discussing MT-30s)

  • 14 AWG wire (24A) should be enough for ESC connections to PDB

• Wire gauge for sensors

• CrimpersElectrical Wiring diagram experiencing slow progress (unfortunately)

  • Some of the modules are in the diagram but things need to start getting connected

  • Power distribution wiring about halfway done

Access in a draw.io document - link in confluence if possible

• Do we have all the JST-GH connectors (housings) that we need to connect to pixhawk

  • Took a quick look in the connectors box and only found connectors for 5 pin

  • Do we need to order more from the other kinds?

Next Term Handoff - Frame Continuation 📑

• make manuals/documents to help this

• Aircraft manual for airframe 2024 comp

• 🔥 Electrical QA Standards

  • make instructional documents for testing ESC, etc

  • how to inspect for solder bridges, spilled solder, cold solder joints

  • twisting wires guide?