Satellites and subsystems > Attitude > Attitude actuators > Reaction wheels > RW25 CubeSat Reaction Wheel
Key highlights
The Serenum Space RW25 CubeSat Reaction Wheel is designed for 1U to 6U sized CubeSat missions. Some of its key features include fine pointing maneuvers, advanced attitude control including freeze mode, and low vibration design. It is mainly suitable for earth observation missions.
Key features
- Speed or torque control mode
- Motor control optimized for low power usage
- Fully automatic single-axis freeze mode
- Wide range of self-diagnostic tools, including:
- current/voltage monitoring
- configurable software overcurrent protection
- automated motor performance evaluation
- in-orbit power consumption optimization - Improved radiation hardness features, including:
- ECC non-volatile memory
- radiation damage detection in all memory banks - Several degrees of redundancy within motor sensors and the possibility to run completely sensorless
- Designed to reduce imbalance of the rotating parts
- Low noise generation
- Low-drift 3-axis gyroscope with built-in high-resolution temperature sensor
- Runtime configurable I2C or UART communication interface with CSP support
- 5 or 8 V variants
- Hardware:
- BLDC motor with 3 integrated Hall sensors
- ARM Cortex-M0+ microcontroller (24 MHz)
- 6-axis Inertial Measurement Unit (3-axis accelerometer, 3-axis gyroscope)
- Interfaces:
- I2C or UART communication interface (runtime configurable)
- CubeSat Space Protocol support
Flight heritage
The system has acheived flight heritage.
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Last updated: 2024-08-20
Technical specs
total momentum storage
0.600 mN m s
maximum torque
0.200 mN m
static imbalance
< 0.003 g cm
dynamic imbalance
< 0.006 g cm
speed range
± 5600 rpm
power rail
3.3 V
idle power consumption
75 to 100 mW
active power consumption1
300 to 400 mW
operating temperature
-40 to 85 C
storage temperature
-40 to 125 C
mass
40 g
length
25 mm
width
25 mm
height
25 mm
radiation tolerance
36 krad
data interface
I2C
UART
UART
1. BOL at maximum RPM, when using default amplitude model. Performance with customized and self-measured amplitude models may vary.
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