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 storage||1.1 N m s|
|maximum power||< 45 W|
|idle power||< 2 W|
|lifetime||> 7 yr|
|survival temperature||min: -35 C, max: 65 C|
|dynamic unbalance||< 0.05 mg m^2|
|torque||30 mN m|
|steady state power||< 9 W|
|static unbalance||< 0.5 mg m|
|angular speed||min: -10000 rpm, max: 10000 rpm|
|operating temperature||min: -30 C, max: 60 C|
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Last updated: 2018-07-28