MicroWheel 1000


The MicroWheel is a “smart” sensor/actuator pair. It includes both a reaction wheel, and an optional solid-state angular rate sensor, both of which are operated locally by an embedded microcontroller. The microcontroller implements local speed and torque control loops for the reaction wheel, allowing the reaction wheel to accurately track speed or torque commands from a satellite's attitude control computer. Commands as well as telemetry (e.g., measured wheel speed, momentum, acceleration, torque, rate sensor measurements, temperatures, voltages, internal pressure, etc.) are communicated via a serial interface.


mass< 1.44 kg
angular momentum storage1.1 N m s
voltage28 V
maximum power< 45 W
idle power< 2 W
length130 mm
height90 mm
lifetime> 7 yr
survival temperaturemin: -35 C, max: 65 C
dynamic unbalance< 0.05 mg m^2
torque30 mN m
steady state power< 9 W
static unbalance< 0.5 mg m
angular speedmin: -10000 rpm, max: 10000 rpm
operating temperaturemin: -30 C, max: 60 C
width130 mm



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Last updated: 2018-07-28