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  • 3.2 CoDR Checklist Kareena Shah
  • 5.2 CoDR Checklist Sreeja Akula   
  • 3.2 (Thermal Equalization) Thermal Strap Analysis Divya Krishna  
  • 4.1 (Rotational Dynamics and Updated Torque Calcs) @Colter @Adrian Elisha Aranibar  
  • 4.1 (Tank and Propellant Pressure Analysis) Brandon Garcia @Rene  

3.2

-kareena

4.1 - 

4.1 Design Book MCU Specs:

  • Frequency up to 480 Mhz
  • 2 Mbytes of flash memory
  • 1 Mbyte of RAM
  • 3x 16-bit ADC
    • STM32H753 VI →
      • Number of Direct channels - 3
      • Number of Fast channels - 2
      • Number of Slow channels  -11
    • STM32H753 ZI →
      • Number of Direct channels - 2
      • Number of Fast channels - 9
      • Number of Slow channels  -17
    • STM32H753 AI/STM32H753 II /STM32H753 BI →
      • Number of Direct channels - 2
      • Number of Fast channels - 9
      • Number of Slow channels  -21
    • STM32H753 XI →
      • Number of Direct channels - 4
      • Number of Fast channels - 9
      • Number of Slow channels  -23
  • –40 to +85 °C temperature range from a 1.62 to 3.6 V power supply
  • 4x I 2Cs– 4x USARTs, 4x UARTs and 1x LPUART
  • a high-resolution timer, 12 general-purpose 16-bit timers, two PWM timers for motor control, five low-power timers


4.2

4.3

5.1

Sensor Inventory

The sensor suite must be finalized for CoDR and justified, including:

IMU (gyroscopes and accelerometers

  • ignore

Redundant rate sensing

  • 2 pressure sensors

Tank temperature sensor array

  • Custom from WIKA

Pump RPM and motor current sensing

  • ignore

Pressure and vent-state sensing

  • ignore

5.2

For each sensor, Controls shall specify:

Update rate

Accuracy and noise

Drift characteristics

Survivability under spin

Electrical interface

5.3


7.1 -


Failure ModeDetectionIsolation / Safe ModeRecovery
Sensor bias / dropoutRedundancy, out-of-range checks, rate checks, residualsFlag sensor invalidity, use backup, and reduce authoriutySensor reset → offset compensation where valid
Unexpected torqueModel vs measured residualsSwitch to damping mode, inhibit impulsesLet residuals decay and re-estimate states
Spin-axis misalignmentOrientation vs expected dynamicsReduce authority, re-acquisitionRe-estimate axis and update control parameters
Partial power lossVoltage / Current thresholdsDisable non-essential processes and maintain survivalGradually restore functions as power stabilizes



FDIR = Continuously:

  1. Observe system state

  2. Compare to model/expectations

  3. Flag anomalies

  4. Enter a safe mode

  5. Attempt recovery

  6. Only return to nominal when consistent

Thermal Straps





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