Summary

NewSpace Systems (NSS) offers the NRWA-T065 reaction wheel for small satellite missions. A high performance alternative to a reaction control system, reaction wheels provide spacecraft with control torque by means of momentum exchange between the satellite body and the rotating wheel.

Typically, three to four reaction wheels are needed to provide full three-axis control of a spacecraft and the additional integration of these wheels with external gyroscopes for full three-axis control using inertial rates. With high torque stability, wheel momentum capacity and accuracy speed control; NSS reaction wheels are suitable for small satellite missions requiring accurate pointing.

The NRWA-T065 is TRL 9 and has extensive in-orbit heritage. Flying since 2014, this wheel has more than 3 million failure-free hours in-orbit with no reported SEU’s. Given the robust nature of the T065 wheel, this product is suitable for longer lifetime missions and constellation programmes.

Key features of NSS reaction wheels include:

  • Wheel torque and momentum capacity suited to client mission requirements
  • Current, speed and torque control
  • Simple digital interface to spacecraft bus
  • Integration with an optional gyroscope for inertial rate control and inertial angle control modes possible
  • Hermetically sealed (not T10)
  • Long demonstrated lifetimes

NSS reaction wheels can be used in a variety of applications, including:

  • High performance three-axis torque and momentum exchange actuators for small satellite missions
  • Momentum bias
  • Inertial rate control for accurate pointing of imagers

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Last updated: 2021-12-23

NRWA-T065 Reaction Wheel

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Specs

9TRL
mass
1.55 kg
length
102 mm (wheel)
width
102 mm (wheel)
height
105 mm (wheel)
maximum torque
20 mN m
maximum momentum storage
0.65 Nms (at 20 mNm)
speed range
-9000 to 9000 rpm
rotor moment of inertia
0.001 kg m^2
speed control accuracy
<1 rpm @ >100 rpm
thermal (acceptance)
-5 to 40 C
power supply
28 V unregulated
data interface
RS422
connector type
15-pin D-type Male
mechanical vibration
16.95 gRMS (random)
radiation tolerance
10 krad (component level)

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