Parameter Descriptions - Delta ASDA-B3 Series User Manual

ASDA-B3

5.7.1.3 Parameter descriptions

A notch filter is used to remove frequencies within a specific range. You can set the three
parameters, including frequency, attenuation level, and Q factor, for each set of notch filter. The
following describes the parameters of attenuation level (notch depth) and Q factor.
Attenuation level of notch filter
The attenuation level of the notch filter determines the notch depth (magnitude) of the frequency
to be filtered. Properly set the attenuation level to effectively suppress the vibration. The higher
the setting value, the better the effect of resonance suppression, but the phase margin of the
system becomes smaller. When you set the value too high, the phase margin may become
insufficient, causing resonance at other frequencies.
When the attenuation level of the notch filter is set to 0, it means the filter function is disabled.
Q factor
Attenuation
level
Frequency
0
-10
-20
Notch depth = 10 (dB)
Notch depth = 20 (dB)
-30
Notch depth = 40 (dB)
-40
2
10
Frequency [Hz]
100
50
0
-50
-100
2
10
Frequency [Hz]
3
10
3
10
Tuning
5
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