CubeSat Reaction Wheels Control System SatBus 4RW0

NanoAvionics has designed reaction/momentum wheels (RW) which can be ordered as separate components or integral 4 reaction wheels redundant 3-axis control system, enabling precision pointing of the small satellite.

Reaction wheels includes DC brushless motors assembled in sealed housing providing no particle emissions and preventing contamination of peripheral devices.

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Reaction wheels includes DC brushless motors assembled in sealed housing providing no particle emissions and preventing contamination of peripheral devices.

General Features:
- Interface: SPI / UART
- DC Voltage: 5 V
- Sealed design – no particles emissions
- Redundant 4 reaction wheel design or
- Single reaction wheel as a separate component
- IPC – A600H class 3 assembly
Single Reaction Wheel Properties:
- Dimensions: 43.5 mm x 43.5 mm x 24 mm
- Temperature range: -40 °C to +85 °C
- Mass: 137 g
Single Reaction Wheel Performance:
- Maximum speed: 6500 RPM
- Maximum torque: 3.2 mNm
- Maximum momentum storage: 20 mNms
- Power consumption (Idle): 45 mW
- Power consumption steady state (1000 RPM): 150 mW
- Power consumption Peak: 3250 mW
- Speed set resolution 0.1 RPM
- Speed control accuracy 500 – 6500 RPM : ± 1 (including ripple)
- Speed control accuracy 100 – 500 RPM : ± 3 (including ripple)
- Total residual disbalance < 50 mg*mm
4RW System Properties:
- Dimensions: 92.5 mm x 92.5 mm x 51.3 mm
- Temperature range: -40 °C to +85 °C
- Mass: 665 g (excluding harness)
4RW System Performance:
- Maximum torque:
  - around X axis: 5.9 mNm
  - around Y axis: 5.9 mNm
  - around Z axis: 2.5 mNm (5 mNm when all 4 RWs are used)
- Maximum momentum storage:
  - around X axis: 37 mNms
  - around Y axis: 37 mNms
  - around Z axis: 15.6 mNms (31.3 mNm when all 4 RWs are used)
- Power consumption (Idle): 180 mW
- Power consumption steady state (1000 RPM each): 600 mW
- Power consumption Peak: 6000 mW