UAS.AMOGH.SITE
Electrical Program  ·  ACTIVE  ·  Target: AUVSI SUAS 2027

OSIRIS The electrical & power program for PolyUAS' autonomous aircraft

PolyUAS builds the airframe, autonomy, and payload. This is the layer underneath: the power and thermal systems that decide whether the aircraft finishes its mission or quietly fails mid-flight. Owned end to end, built from the ground up.

Airframe
Heavy-lift quadCustom waterjet CF frame
Compute
Jetson Orin NanoOnboard edge-AI vision
Autopilot
Cube Orange+ SIYI A8 gimbal
Pack
Custom 21700 Li-ionMolicel P42A / P45B
01The Aircraft

Osiris: an autonomous heavy-lift quad for SUAS air delivery

A high-value, tightly-integrated aircraft. Every subsystem below is a fixed electrical interface the power and avionics design has to serve.

ORIN NANO CUBE ORANGE 21700 PACK MOTOR + ESC ×4 SIYI E6 PROP SIYI A8 GIMBAL
Fig. 01 — Osiris subsystem layout (schematic)
Flight ctrlCube Orange · ArduPilot / PX4
CompanionJetson Orin Nano Super · edge-AI CV
GimbalSIYI A8 mini · 4K, UART + Ethernet
Video + ctrlHerelink 2.4 GHz HD · + Nomad ELRS
Power dist.SmartAP PDB · custom 21700 pack
PropulsionSIYI E6 / T-Motor U7 280KV
NavHere3 + Here+ RTK · Cube ID (Remote ID)
PayloadRobotic arm + package drop
02The North Star

Own the power and thermal truth of the electronics

Turn it into reliability the software team can't get on its own. One thesis, two deliverables. Both sit where the electronics meet the physics, which is exactly the seam a software or autonomy team can't reach.

◈ Organ 01 · Edge-AI thermal reliability

Keep the AI running when it matters most

The Orin thermal-throttles under sustained vision inference in a hot canopy: clock drops, detection frame-rate drops, targets get missed. That is not a vision problem, so the CV team can't fix it. It's a power and thermal problem.

Fig. 02 — Throttle onset: temp crosses limit, clock & FPS fall (illustrative)
  • AInstrument the compute rails and junction temps under real inference load.
  • BDetect throttle onset early, before the clock actually drops.
  • CAct: thermal-aware inference sheds load before a hard throttle costs a detection.
Starts this week, no board required. Rev0 runs in software on the Orin's own onboard power sensors (tegrastats / jtop).
◈ Organ 02 · Smart battery

A pack that reports and predicts its own health

The custom 21700 pack deserves a proper battery management system. Today it has no per-cell monitoring, balancing, or health telemetry. Adding a smart BMS is high-value, safety-critical EE, and squarely the EE side's to own.

BMS V · T · I balance protect cell drift flagged early
Fig. 03 — Per-cell sense (V·T·I) → balancing, protection, live telemetry
per-cell voltagemulti-point temppack currentbalancingprotectionMAVLink / CAN telemetry
Built safely. Designed around a proven protection AFE (TI BQ769x2 / ADI LTC68xx) with hardware over-current + fuse as the real safety net. The smart layer is added intelligence, never the sole protection.
Also on deck

Custom Orin carrier board

Isolated compute power (kills brownout under motor transients) with every peripheral broken out on one board, plus onboard power + thermal instrumentation.

Also on deck

Custom control / telemetry radio

Our own board around proven RF silicon (SX1280 2.4 GHz + SX126x 900 MHz). Herelink keeps HD video; this owns the control link. Link budget: ~22 dB margin at 3 km.

Also on deck

Custom sensor modules

Purpose-built breakouts (power/thermal sense, payload interfacing). Also the right first real board for new EE members to own under review.

03Power Architecture

Isolate the avionics from the propulsion

The single most important power decision on the aircraft. Motor switching dumps noise on any rail it shares; the number-one way a companion computer reboots mid-flight is by drinking from the same supply as the ESCs. So the compute gets its own clean, regulated, isolated rails.

21700 PACK Li-ion + BMS PDB high current ESC + MOTORESC + MOTORESC + MOTORESC + MOTOR ◄ isolation barrier · dedicated regulators + bulk caps ► AVIONICS BEC BANK 5V clean · 5V compute · 2–4S Cube OrangeJetson OrinSIYI A8 gimbalRadio link propulsion (noisy) avionics (clean)
Fig. 04 — Isolated power tree. Compute never shares a rail with the motors.
04Roadmap

Fly on proven parts first, then layer the custom hardware in

The aircraft must fly without any of the custom boards, so a season is never hostage to a board respin. Milestone-driven, anchored to AUVSI SUAS 2027. Every board clears a review gate before it costs money or flies.

Phase 0

Foundations

Architecture, standards, component selection. Fly on commercial PDB + ELRS.

Phase 1 · now

Edge-AI thermal

Organ 01. Software-only characterization + detector on the Orin.

Phase 2

Carrier board

Isolated compute power + integration. First custom board.PDR → CDR

Phase 3

Smart BMS

Organ 02. The safety-critical build.PDR → CDR

Phase 4

Radio + sensors

Custom control link + instrumentation boards.bring-up

Phase 5

Flight → SUAS

Integration, flight test, competition.flight-ready

Sequencing call: start with the edge-AI thermal work, not the BMS. It's faster, software-first on hardware that already exists, and it proves the health-monitoring approach before we commit months to a safety-critical board.
05The EE Sub-Team

Built from zero, structured to scale

PolyUAS had no prior EE material. So this is a sub-team being built from the ground up: structured so it works with one person today and scales cleanly as members join, with the review discipline that separates a board that flies from a board that never leaves the bench.

How the work is owned

  • 01Harness & connectors — the entry role. Concrete, teachable, low blast radius.
  • 02Power & distribution — regulators, isolation, the brownout fix.
  • 03Instrumentation — sense + thermal, off the flight-critical path.
  • 04RF / radio — the hardest board; led by Amogh, taught through.
  • 05Test & integration — bring-up checklists, flight-line electrical.

No EE experience required to join. A ramp takes a beginner from "never opened KiCad" to owning a bounded, real piece under review.

Review gates

Nothing goes to fabrication without clearing a gate. This is the discipline that makes a beginner team actually ship.

PDR  Preliminary · before layout
CDR  Critical · before fab
BRING-UP  Bench · before integration
FLIGHT  Ready · before it flies
Status
Recruiting
Anchor
AUVSI SUAS 2027
Tooling
KiCad · LTspice · PlatformIO · Git