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Reaction Wheel Assenmbly Type S

Reaction Wheel Assenmbly Type S
Registration date 5/15/2014
JAXA development group Research Unit I, Research and Development Directorate
View diagram See Attachment 1
Environmental resistance See Attachment 2
Patent number
(publication number)
N/A
Reference N/A
Satellite and launch date Flight models will be launched on Super Low Attitude Test Satellite (SLATS) in FY2016
Note N/A
Manufacturer

Mitsubishi Precision Company, Limited
Kamakura-shi, Kanagawa, Japan
http://www.mpcnet.co.jp/e/index.html

Features

Type S is a part of the new reliable low-disturbance reaction wheel assembly family (Type L, Type M and Type S).
Type S exploits the heritage of the advanced and highly-reliable design of its predecessors, Types L and M, but is optimized for its small-size, light-weight and low-cost requirements for small spacecraft missions.

Applications

Reaction Wheel is a attitude control actuator for 3-axis stabilization of spacecraft.
Type S covers a storage momentum range from 5 Nms upto 10 Nms for spacecraft weight between 300 kg and 500 kg.

Specifications

Item Specification
Momentum (Max.) 5 Nms, 10 Nms (2 version)
Output torque (Max.) @5000 rpm >0.06 Nm
Speed range -5000 to 5000 rpm
Run-up time
0 to 5000 rpm @output torque (Max.)
5 Nms : <83 s
10 Nms : <167 s
Coast-down time
5000 to 100 rpm @motor off
5 Nms : >327 s
10 Nms : >653 s
Power consumption Peak torque
@5000 rpm, 0.06 Nm
<69 W
Steady state
@5000 rpm, 0 Nm
<15 W
Disturbance force / torque force <2 × 10-4 × f2 N @10 ≦ f ≦ 83.3 Hz
<1.4 N @f >83.3 Hz
torque <4 × 10-5 × f2 Nm @10 ≦ f ≦ 83.3 Hz
<0.28 Nm @f >83.3Hz
Bus voltage 22 to 52 Vdc
Vibration sine wave 245.2 m/s2 (25 G)
random 196.0 m/s2 r.m.s. (in-plane)
206.3 m/s2 r.m.s. (outo-of-plane)
Temperature range Operation -15 to +60 °C
Turn-on -30 to +60 °C
Non-operation (storage) -30 to +70 °C
Life On round and storage >5 years
On orbit >10 years