参数资料
型号: EVAL-AD2S1200SDZ
厂商: Analog Devices Inc
文件页数: 11/24页
文件大小: 0K
描述: BOARD EVAL FOR AD2S1200
标准包装: 1
主要目的: 接口,旋转变压至数字
嵌入式:
已用 IC / 零件: AD2S1200
主要属性: 图形用户界面(GUI)
已供物品: 板,CD,电源
AD2S1200
Rev. 0 | Page 19 of 24
04406-0-012
1
5
–0
–40
–35
–30
–25
–20
MAGNITUDE
(dB) –15
–10
–5
–45
10
100
10k
1k
FREQUENCY (Hz)
100k
Figure 12. RDC System Magnitude Response
04406-0-013
1
0
–20
–180
–160
–140
–120
–100
PH
A
SE
(
D
egrees)
–80
–60
–40
–200
10
100
10k
1k
FREQUENCY (Hz)
100k
Figure 13. RDC System Phase Response
04406-0-014
0
20
18
2
4
6
8
10
A
N
G
LE
(
D
egrees)
12
14
16
0
12
4
3
TIME (ms)
5
Figure 14. RDC Small Step Response
SOURCES OF ERROR
Acceleration
A tracking converter employing a Type II servo loop does not
suffer any velocity lag. There is, however, an error associated
with acceleration. This error can be quantified using the
acceleration constant (Ka) of the converter.
Error
Tracking
on
Accelerati
Input
K
a =
Conversely,
a
K
on
Accelerati
Input
Error
Tracking
=
Figure 15 shows tracking error versus acceleration for the
AD2S1200.
The numerator and denominator’s units must be consistent. The
maximum acceleration of the AD2S1200 has been defined as
the acceleration that creates an output position error of 5°
(when LOT is indicated). The maximum acceleration can be
calculated as
2
000
,
103
)
/
(
360
5
)
(sec
rps
rev
K
on
Accelerati
Maximum
a
°
×
=
The AD2S1200 will be able to withstand the maximum
acceleration of 103,000 rps2 for approximately 10 ms before
reaching its maximum tracking rate of 1,000 rps.
ms
rps
10
)
(
000
,
103
)
(
000
,
1
2
04406-0-015
0
10
9
1
2
3
4
5
TRACKING
ERROR
(Degrees)
6
7
8
0
40k
80k
160k
120k
ACCELERATION (rps2)
200k
Figure 15. Tracking Error vs. Acceleration
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