Attendance

Agenda

Power System

• Check all XT90 connectors and replace as needed by Saturday,

  • some have cut heatshrink on the edges.

  • replace heatshrink on these if possible

  • should have a solid pulltest on each

  • complete before this weekend, could see it here

  • possibly @Omar El-Sawy with guidance from @Jerry Tian

  • more of a session to get people up to speed on this

• Pegasus 2

  • ESCs are on it, PDB is on as well

  • motors are in flight test box

  • we have enough spares, could take Houston’s avionics

• Propellers

  • spares in the flight test box

  • double check count of these before, actual count should exist somewhere

    • @Nathan Green to log what we think we have

Perception

• Operating tracking antenna and path at same time for task 1

  • hard code lap count 3 on autonomy side and then run the that for comp

  • there’s some ideas, but needs to be ready for this weekend

    • forwarding mavproxy could solve

      • tracking antenna never writes

      • @Mihir Gupta may try looking into this

• Lap Timing stuff for pathing

  • works on realflight

  • some yaw error is solvable, make comp waypoints look like wrestrc waypoints

  • #auto-path-optimization for discussion here! trc

Video System

Avionics

• Upload new Magfit params generated last weekend to the drone before Saturday the 18th.

  • First time we did full throttle without dropout!

  • No random EKF failures last test with older magfit data

• Take a full parameter backup after uploading Magfit params.

• Will we need to make new ones at comp

  • hopefully not, ardupilot can calibrate based on gps location

  • we only did compass calibration twice ever on peggy

Airframe - General

Action items / blockers:

• Pegasus 2? I don’t think it is in a state where it will be comp ready -Nathan

  • Are both drones flying this weekend?

    • Pegasus 2 is not ready electrically to fly

    • Target wiring before competition

    • Someone on EE going to comp here

    • More people involved here!

    • https://app.asana.com/0/1201162534917006/1207292626882892

• Lighting needs to be installed and working by Saturday or it will not be run at comp. (Mech/EE)

  • Possibly all four boards are functioning, all four ready to mount

  • will need new firmware to make this solve

  • biggest risk is that the boards will get smashed on the motor mounts

  • electrically this is a safe system as far as preventing fault propagation to other electrical systems. switched off in flight normally.

  • could use peggy 2? don’t want to smash the boards from flight vibration

    • we wanted to test this sooner

  • could have an extra piece to support this without the motor mounts

  • could do it so extra mount for these so the extra mount comes off before flight

  • connector situation would be a risk bc onboard

  • lot of risk for style points

  • could we test this weekend?

    • if we take it off now system is untested

    • could do it for pre-comp photos?

      • completely remove it for comp

      • dark photo

      • must go before FT this weekend

      • would be fixed color from FW

      • dont wanna change anything after FT

      • another battery just for this system, make it completely drop in

      • points for judging and photography for presentation

        • photography last year was huge

    • next year we be more ready!!

  • @Parker Lawrence-Valeriani to relay this message to team to make this happen before this weekend!

• Lighting FW updates

  • 4 boards flashed successfully

  • 4 LEDs (boards 1, 2, 4, 5) were successfully flashed with firmware to cycle through states of lighting up the navigation, beacon, and anti-collision lights. Current firmware sets these colours to a fixed position, lighting them on and off when needed.

  • Encountered issues trying to modify the firmware to keep all LEDs on at all times (to maximize brightness); light pattern seems to break after ~5 seconds of being powered. Currently being tested on board 5.

  • See above stuff for context

• Repair landing gear

  • this was done by @Smile Khatri

  • if no time at comp we can duct tape landing gear @Alison Thompson just not at FT lol

  • comp is just two landings total, we should have plenty of time here

• Changes to landing gear

  • make it a bit heavier to reduce the change of breaking on landing

  • switch them all out before this FT if there’s time, @Smile Khatri thinks leave the old slotted current ones on for this FT

  • time vs risk vs reward thing, dont wanna switch after last FT

  • at comp switch out as they break, ones without slits (new ones) should be better

  • balance change is negligible compared to unbalanced electronics

• Crash Landing?

  • passengers have seatbelts

  • last time people who lost drones for safety completely crumpled their cabins with passengers inside

  • we’ll ask the judges and plan accordingly

  • we wont worry about the legs (especially on task 2)

• Cabin signage

  • @Evan Janakievski looking into those

  • “At least one clear and visible signage/instructions/placard for accessibility features”

    • wheelchair thing?

  • “At least one non-functional label (company name/logo, badge, etc.)”

    • WARG sticker? registration number? smthing

    • we have some small WARG stickers that could be interesting

    • could hack together sticker paper? @Nathan Green

Tracking Antenna - General

Action items / blockers:

• Add spacer so that the pitch axis can be used.

• Implement method in software so that the tracker knows its starting bearing.

• Remove debug code that requires a serial monitor connection to run antenna tracker.

Updates:

• Tracking antenna yaw axis was tested and working at the flight test last Sunday.

Mech	Pitch	spacer is manufactured @Smile Khatri pitch assembly disassembled need to re-waterjet one of the stands (accidentally bend the part while press fitting, no damage to the bearing) and then press fit the bearings (shop closed before I could re-do). Will be done tomorrow. @Smile Khatri plz grease gears before running @Smile Khatri
Electrical		no changes?
EFS	North Bearing	The calibration to the magnetometer seems really doable, we could also add tile compensation so the compass will still be correct if the tower is not leveled. Encountered some soft/hard iron calibration issues today, when trying to rotate the tracking antenna for 360, the calibration progress struggles to go up. This is the only piece that we need to make this work. Roni is trying to figure out why. Tho the mag is really close to work, it is still having about 30 degrees offsite caused by an unknown environmental factor? Will do manual calibration as backup for sure. @Roni Kant In Daniel’s opinion this backup should be the primary. adjust during startup and flight no magnetic compass on tracking ant Aidan and Nathan have real compasses
Autonomy	Pathing	Done Tested on Real Flight simulator today No issues were found in competition takeoff waypoint Found an issue in competition lap waypoints Aidan has a hypothesis for this will work tgther rotation specified in each point could be requiring this. No issues were found in WRESTRC takeoff or lap waypoints TODO Test on Real Flight simulator with wind on Fix issue with competition lap waypoints Write up documentation for code ensure comp team knows how to use this Summary of Issues Found Competition lap waypoints Open Open Proposed solution is to get ride of waypoint in the middle of the lap turn WRESTRC waypoints already do this   WRESTRC waypoints

General Updates

• We leave for comp in just over one week.

• Autonomy lap timing script must be tested in realflight with wind and gusts before Saturday, or it will not be used at comp.

  • mentionned above, on pace, @Mihir Gupta @Aidan Bowers (Deactivated)

• Need to determine how the antenna tracker and the autonomy timing script can work at the same time, this must be implemented by Saturday or we are going to hard-code a number of laps.

  • pymavproxy @Mihir Gupta @Aidan Bowers (Deactivated) @Tong Zhang

Flight test schedule

• Saturday May 18th, last flight test before comp.

  • What are we testing this system?

    • task 1 script with tracking antennas

    • task 2 approach

      • practice callouts for comp points

    • More pilot trainning for task 2?

      • Nathan has done it twice, Yuchen hasnt done it at all

      • @Alison Thompson yes, 3d prints are fixable, @Smile Khatri prepping extras

      • @Nathan Green is intended pilot at competition, @Yuchen Lin possibly up to try

      • @Nathan Green try and go slow for a few attempts, then if legs remain hand off to Yuchen for practice.

      • do this last

  • todos

    • video recordings

    • We need to be at this flight test with our final comp configuration. The antenna tracker must be working and finalized by Saturday. If something is not run/not working at this flight test it will be scrapped for comp.

Questions

• 2024-04-22 RF Electronics Filters

  • Testing equipment

    • Ask Joe what he has?

    • Ask HAMs what they have?

    • lab in university?

  • Out of time for long term orders right now!

    • Digikey shipping could clutch up, to someone’s house so it doesnt get lost

    • 3 bandpass for 2.4 full band for elrs then one for 1.3ghz (23cm) fullbad for video patch receiver

• Lighting system stats and plan?

  • run for comp?

  • firmware worky?

  • talked about above

• pre competition logistics and roles sync

  • @Daniel Puratich can schedule, we wanna do!

  • do it before flight test so people can do their rolle

  • we leave on thursday.

• are we having people record all flights and uploading them somewhere? I haven't seen any videos but we should be, it will help with RCA and looking back at how the drone flew (@Alison Thompson

  • last FT we accidentally failed to record DVR

  • Videos are uploaded to media ingest for some of last FT but not all angles of landing as we should’ve done

  • record ground station comms, makes it easy to figure out what happenned

• Is the battery condition for task 1 set on mission planner

  • we need to go through fail safes

  • @Aidan Bowers (Deactivated) bigest in person candidate here

  • Nathan can do remote but needs someone onsite.

• task 1 extra thing!

  • 15 points for racing to task 1, can we do it

  • the code does fullspeed, does right triangle, kind of all that can be done on auto side

  • increase climb speed in params (do before FT)