Biomedical Engineering Reference
In-Depth Information
TABLE 13.1
Comparison of Parameters for Monkeys and Humans
Parameter
Human
Rhesus Monkey
Radius of eyeball
11 mm (11.8 mm in model)
10 mm
K
se
125 N/m
125 N/m
K
lt
60.7 N/m
77.66 N/m
B
1
5.6 Ns/m
4 Ns/m
B
2
0.5 Ns/m
0.4 Ns/m
0
:
4
þ
0
:
0175 jj
, for y >
0
0
:
55
þ
0
:
0175 jj
, for y >
0
F
¼
F
¼
F
0
:
4
0
:
0125 y
jj
, for y
0
0
:
55
0
:
0125 y
jj
, for y
0
K
16.34 N/m
10.21 N/m
B
0.327 Ns/m
0.204 Ns/m
10
3
Ns
2
/m
10
3
Ns
2
/m
J
2.2
1.76
and for monkeys
10
5
2
:
6904
ð
s
þ
312
:
5
Þ
H
ð
s
Þ¼
ð
13
:
58
Þ
10
5
10
6
s
3
þ
575
:
2
s
2
þ
1
:
4829
s
þ
2
:
7743
There are three poles and the one zero in the transfer function. Using the parameter
values in Table 13.1 for humans, the poles are
292
:
22
þ
j
168
:
63
292
:
22
j
168
:
63
11
:
92
and the zero is
250
For monkeys, the poles are
277
:
48
þ
j
245
:
09
277
:
48
j
245
:
09
20
:
24
and the zero is
312
:
5
For humans, the time constant for the real pole is 3.4 ms, and the time constant for the com-
plex pole is
83.9 ms. Similarly, for monkeys we have 3.6 and 49.4 ms.
