Siemens SINUMERIK 840D Description Of Functions page 104

4 Firmware Drive Functions
4.3 Closed-loop velocity control
4-104
SINUMERIK 840D/SIMODRIVE 611 digital Descr. of Functions HLA Module (FBHLA) – 04.00 Edition
Amplitude log
10
frequency curve
3
0
–3
Absolute
value
–10
[dB]
–20
–30
Phase frequency
curve
180
90
Phase angle
[degrees]
0
–90
–180
Fig. 4-5 Frequency response of undamped band-stop with a bandwidth of 500 Hz and
variations in blocking frequency (MD 5514) of 500 Hz, 1000 Hz, 2000 Hz
Amplitude log
10
frequency curve
3
0
Absolute
–3
value
[dB]
–10
–20
–30
Phase frequency
curve
180
Phase angle
90
[degrees]
0
–90
–180
Fig. 4-6 Frequency response of undamped band-stop at a blocking frequency of 1000
Hz and variations in bandwidth (MD 5515) of 100 Hz, 500 Hz, 1000 Hz.
The bandwidth is the difference between the two frequencies with 3 dB drop in
amplitude.
500 Hz
2
10
500 Hz
1000 Hz
2
10
1000 Hz
2
10
100 Hz
1000 Hz
500 Hz
2
10
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02.99
1000 Hz
2000 Hz
3 log f [Hz]
10
2000 Hz
3 log f [Hz]
10
100 Hz
500 Hz
3 log f [Hz]
10
3 log f [Hz]
10