Symbol Description S.I.
π
mass of rotor 2.3βKg
πΌ
π
polar moment of inertia
8
Γ
1
0
β
4
βKgΒ·m2
πΌ
π
transverse moment of inertia
6
Γ
1
0
β
2
βKgΒ·m2
π
π
π΄
distance bearing
π΄
from centre of mass
πΊ
0.241βm
π
π
π΅
distance bearing
π΅
from centre of mass
πΊ
0.139βm
π
π
π΄
distance sensor
π΄
from centre of mass
πΊ
0.241βm
π
π
π΅
distance sensor
π΅
from centre of mass
πΊ
0.119βm
π΄
π
(
π΄
,
π΅
)
pole surface
6
.
6
Γ
1
0
β
5
βm2
π
0
(
π΄
,
π΅
)
nominal gap
3
.
8
1
Γ
1
0
β
4
βm
πΌ
slope of bearings axis 45Β°
π½
angle of two electromagnet poles 45Β°
πΌ
slope of bearings axis 45Β°
π
π
,
πΌ
π
,
πΌ
π
uncertainties percentage
1
0
%
πΏ
π
,
πΌ
π
,
πΌ
π
range of uncertainties
[
β
1
,
1
]
π
(
π₯
,
π¦
)
(
π΄
,
π΅
)
displacement gain 144000βN/m
π
(
π
π₯
,
π
π¦
)
(
π΄
,
π΅
)
current gain 38 N/A