2024-03-04 AEAC Sync
Attendance
Mechanical:
@Alison Thompson
@Evan Janakievski
@Nathan Green
Electrical:
@Jerry Tian
Embedded Flight Software:
@Derek Tang
@Ayush Ganguly
@Sam Zhang
Autonomy:
@Aaron Wang
@Tong Zhang
Operations:
Directors:
@Anthony Luo
@Megan Spee
Flight test Recap
No FT occurred over reading week.
Agenda
Propulsion + Control
Action items / blockers:
Updates:
2024-02-02 Surface Area of Front and Right of Pegasus - SysInt - WARG (atlassian.net)
relevant to wind estimation
Mech |
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Electrical | Capacitor analysis | @Anthony Zhelnakov measured inductance of the existing harness, very small, less than 1 uH don’t need extra capacitors |
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EFS | Wind Estimation | logs analyzed in order to find propeller drag: from Feb 3rd FT
people are looking at it |
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Motor control / FFT bidir dshot? |
people looking at it |
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Sensing
Action items / blockers:
Updates:
Mech | Houston Sensor Mounts |
The next time we fly autonomous OA with terrain following, we will want the rangefinder on houston - within next 3 weeks mount complete + do not need lidar on peggy at the moment
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Electrical | Houston Sensor Harnessing | Lot of extra wires on houston at the moment, starting to interfere with compass put some time towards new houston harness, good opportunity to learn/teach during potentially an EE work session things like crimping wires/ anything we need to replicate for pegasus we should try out on houston first!
Rangefinder harness needs to be made too (see above mech section) |
EFS | OFS use | Check that OFS is configured properly? (vel_X vel_Y source)
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Autonomy |
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Video System
Action items / blockers:
Antenna locations (read: interference yay)
Updates:
Mechanical | Mounting | VTX mount may need to be done again. Depends if we change VTX location/item based on interference! remember this Monster mount exists. nice |
Electrical | VTX harnessing | @Neel Patel @Neel Patel pre-crimped JST arrived, can you clean up this harness? |
| general antennas | Antenna mounting locations.
should try 5.8GHz VTX |
EFS | RC Controller Mapping | standard template to be created at some point @Anthony Luo @Megan Spee
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Ardupilot Mux Output Config | for next FT (currently untested). also wiring issues with current system?
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Ardupilot OSD Config | To investigate dropouts + to configure OSD to have important information!
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Autonomy | LTE Video? | assigned out, blocked kinda. difficult to parallelize. skip |
Command + Telem
Action items / blockers:
Updates:
Mech | Gemini case? | assigned out will check on it tomorrow meeting |
Electrical | RFD Board | ready to test @Yuchen Lin
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| ELRS Gemini PCB | XT30 not arrived yet |
EFS | Gemini LinkStats |
want to flight test soon. received new receivers recently so we are no longer blocked.
building custom version of firmware after reading week!
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Improved Streaming |
can’t find RP1. : / | |
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| Post-flight test thoughts on tracking antenna: (last meeting) code was polling GPS too often. causing motors to twitch. got it working again by initiating the polling after GPS has a lock. another issue - a GPS doesn’t get any satellites? resolve by trying another GPS, maybe. |
Autonomy | LTE |
LTE monitoring script: script written thurs, tested friday. Issues with libraries. getting logging script ready for next flight test @Maxwell Lou ! @Nathan Green got this working saturday?
@Mihir Gupta @Maxwell Lou telemetry forwarded to server, routed to ground station. for image transmission: assumed we were using zerotier. Can we continue to use zerotier for image transmission?
consider other VPN services? - Tailscale?
architectural background TX assumes RPI/GS are on the same network. assume you can find the IP of the other computer instantly w/o SSH/FWD’ing. |
Airframe - General
Action items / blockers:
Houston: New landing gear, takeoffs & Handling at different weights.
Updates:
< Decision Documentation >
Mech | Pegasus |
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| Houston | Houston landing gear request via @Anthony Luo from jan 29
Estimated 300 g additional weight max for new landing gear https://discord.com/channels/776618956638388305/824066661820399697/1206579554274119680 @Smile Khatri - PM for redesigning houston landing gear |
Electrical | LED Board | messed up MCU pinout in the PCB design gg |
| Sensor harnessing | Need appropriately sized wiring looms(?) for the sensors. Potentially crimping own wires? Colour standards? Sheaths? etc…
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| Power Harnessing | Smaller / lighter weight battery harness to be made. +4 configuration only. Current wire lengths are significantly longer than necessary.
saving weight, anything counts, its a drone for current Pegasus, we want to shorten the wires. for new Pegasus,
questions about the batteries
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| Houston Harnessing | pls clean this up ! Lots of compass interference issues & extra weight that we don’t want to be carrying good test run for trying things before doing the same on peggy lots of time to clean it up and test things |
EFS | LED Board Firmware |
want EE to build an on board circuit that allows us to flash? @Derek Tang arduino mega <> LED board. LED board not sending anything. follow up in thread |
Autonomy |
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Tracking Antenna - General
Action items / blockers:
Ground tests blocking tracking antenna flight test.
EFS going to procure GPSs
EE going to make a confluence doc yayyy
Updates:
< Decision Documentation >
Mech | Tracking Antenna Mechanical |
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Electrical | Nucleo Shield | pcb ready for 1st round of review
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EFS | Arduino Tracking Antenna |
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Autonomy |
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General Updates
Flight test schedule
Looking like auto-land/landing pad detection not making march timeline.
Let’s try and fly a properly configured FPV system on the 9th
Comp sim #1 still looking to be on the 23rd. May be pushed if we don’t get new batteries by then (not in stock).
Action Items
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