Project planning guide
cyber
®
reaction wheel 2
en-8
Doc. no.: 5022-D060586
Revision: 02
2.1.4.2 Control characteristics
According to the following figure, the cyber
®
reaction wheel 2 can be approximated as a first or
second order system.
Figure 1.3: Illustration of the step response of the cyber
®
reaction wheel 2 at an acceleration jump from 0 rev/s² to 60 rev/s²
Wittenstein recommends using a transfer function second order with the following parameters for
simulation to better map the settling time:
1+Tz*s
G(s) = Kp * -------------------------------- * exp(-Td*s)
1+2*Zeta*Tw*s+(Tw*s)^2
Kp = 0.983
Tw = 0.228
Zeta = 1.867
Td = 0.01
Tz = 0.908
SettlingTime: ~1.7
Overshoot: ~10 %
2.1.5 Electrical data
Electrical data
Unit
Value
Nominal supply voltage
V DC
5
Supply voltage range
V DC
3.0…8.8
Max. power input (configurable)
mW
<2000
Inrush current power off/on
mA
480
Inrush current disable/enable
mA
560
Plug-in cycles for connector A
number
max. 30
Table 4: Overview of electrical data of the cyber
®
reaction wheel 2
