3 SPECIFICATIONS
Table 3.1 lists and characterizes the main parameters associated with the Shake Table II.
Symbol Description Value
R
m
Motor armature resistance 2.94 Ω
L
m
Motor armature inductance 6.16 mH
k
t
Motor current-torque constant 0.36 N-m/A
k
m
Motor back-emf constant 0.224 V/(rad/s)
P
b
Ball screw pitch 0.0127 m/rev [0.5 in/rev]
M
l,max
Maximum total load mass 15.0 kg [33.0 lb]
M
s
Mass of Shake Table II system 27.2 kg [60.0 lb]
Dimension of top stage. 0.46 × 0.46 m
2
[18 × 18 in
2
]
Dimension of bottom stage. 0.61 × 0.46 m
2
[24 × 18 in
2
]
Height from bottom to top stage 12.4 cm [4.875 in]
x
max
Maximum stroke position from midway point. 76.2 mm [3.0 in]
v
max
Maximum velocity of stage. 664.9 mm/s
[26.18 in/s]
F
max
Maximum force of stage. 708.7 N [159.3 lb]
a
max
Maximum acceleration of stage for 0 kg load. 24.5 m/s
2
g
max
Maximum rated acceleration of stage for 0 kg load. 2.50 g
K_ENC Encoder sensitivity gain 3.1006 µm/count
1.22 × 10
−4
in/count
K_ACC Accelerometer sensitivity gain −1 g/V
Dynamic load capacity of ball nut. 12000 N [2697.6 lb]
Life expectancy of ball nut at full load. 6.35 × 10
8
m
[2.50 × 10
10
in]
Life expectancy of linear bearing. 6.35 × 10
6
m
[2.5 × 10
8
in]
Load carrying capacity of linear bearings. 131.5 kg [290 lb]
Table 3.1: Specifications
STII User Manual
v 3.1
To Next Page
Loading...
