Siemens SINUMERIK 840C - Manual (Page 1126)

08.96 12 Functional Descriptions
12.33.5 Speed setpoint filter
Example of speed setpoint bandstop
fz : Blocking frequency MD 1514/MD 1517
DZ : Damping numerator
fbz = 2 x Dz x fz : Bandwidth numerator MD 1515/MD 1518
Dn : Damping denominator
fbn = 2 x Dz x fn : Bandwidth denominator MD 1516/MD 1519
fn = MD 1520(%) x fz : Bandstop natural frequency MD 1520/MD 1521
Amplitude response
Magnitude
[dB]
log f [Hz] 10 2 10 3
10
3
0
-3
-10
-20
-30
Phase response
Phase
angle
log f [Hz]
10 2 10 3
180
90
0
-90
-180
707
1414
1000
1000
707
1414
707
1414
Fig. 12-9 Frequency response of general bandstop with blocking frequency f
z
= 1000 Hz,
bandwidth f
Bn
= 500 Hz, counter bandwidth f
Bz
= 0 Hz and variation in natural
frequency f
n
= 707, 1000 and 1414 Hz.
© Siemens AG 1992 All Rights Reserved 6FC5197- AA50 12–351
SINUMERIK 840C (IA)