- 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) Izaan Rizvi @Colter Adrian Yang Elisha Aranibar
- 4.1 (Tank and Propellant Pressure Analysis) Brandon Garcia @Rene
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Rigid-Body Rotational Dynamics (Tank Spin System):
Tank Specs:
- Material → 304L Stainless Steel
Length → 15 cm
Radius → 4 cm
Thickness → 0.5 cm
Mass → 1.143 kg
Configuration:
- Thin-walled cylindrical tank approximation
Instrumented with internal thermocouples
Sealed end-cap with wiring feedthrough
Moment of Inertia (Izz):
- Izz = mR²
Izz = (1.143 kg)(0.04 m)²
Izz = 0.001829 kg·m²
Drive Torque:
- τ = 0.840 N·m
Angular Acceleration:τ = Iα → α = τ / I
- α ≈ 459.4 rad/s²
Spin Rate Requirement:
- 2–3 RPM
ω ≈ 12.57 – 18.85 rad/s
Spin-Up Time:
- t = ω / α
t ≈ 27 – 41 ms
Power Estimate:
- P ≈ 6.5 W
Motor / Servo Notes:
- Torque–speed curve limits max RPM
Servo must provide ≥ 0.84 N·m stall torque
Continuous power ≥ 6.5 W
Design Task:
- Evaluate 4 candidate servos from electrical spreadsheet →
Compare torque, speed, power, and mass to select optimal model.
4.2
4.3
5.1
Sensor Inventory
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FDIR = Continuously:
Observe system state
Compare to model/expectations
Flag anomalies
Enter a safe mode
Attempt recovery
Only return to nominal when consistent
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