AFS_Adom flight computer molecule - sim/servo_pulse.json

by ae007

Active fin stabilization flight computer for a sounding rocket, a clean-room AI redesign of the Rice Eclipse AFS board: RP2350B, ICM-45686, KX134-1211, MMC5983MA, MS5611, TMP117, INA219A, 8 servos, 2S LiPo, USB-C; 4-layer Adom molecule, designed end to end by Claude through KiCad and adom-aiflow

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ae007 Project page: AFS_Adom rev A (Rice Eclipse AFS clean-room AI redesign): highlight reel and narrated process video with… cbe460e 7d ago

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{
 "model": "own ngspice model: 2S pack 7.4 V behind 25 mOhm and 1 uH of cable, 5 mOhm shunt, 2x220 uF (0.25 Ohm ESR), INA219 RC input filter, ideal diode and buck input load",
 "scenario": "0.3 A baseline, 8 A servo stall pulse from 5 to 25 ms (all eight servos)",
 "checks": [
  {
   "name": "ina219_shunt_input_mV_at_8A",
   "value": 45.36,
   "limit": 80.0,
   "pass": true
  },
  {
   "name": "shunt_dissipation_W_at_8A",
   "value": 0.411,
   "limit": 2.0,
   "pass": true
  },
  {
   "name": "servo_rail_droop_V",
   "value": 0.771,
   "limit": 1.0,
   "pass": true,
   "note": "self-set budget: 8 A x (25 mOhm pack + 5 mOhm shunt) = 0.24 V DC plus the cable L di/dt; servo rail stays above 5 V from a 6 V pack; the design item is VSYS and the INA219 range"
  },
  {
   "name": "vsys_min_V_during_pulse",
   "value": 6.803,
   "limit": {
    "min": 3.8
   },
   "pass": true
  }
 ],
 "pass": true,
 "ngspice": 0
}