Chapter 6 Control Mode of Operation ASDA-A2R Series
Revision December, 2014
6-29
Here illustrates the effect via low-pass filter (parameter P2-25). The following diagram is
the system open-loop gain with resonance.
增益
頻率
When the value of P2-25 is increased from 0, BW becomes smaller (See as the following
diagram). Although it solves the problem of resonance frequency, the response
bandwidth and phase margin is reduced.
增益
頻率
0dB
BW
If users know the resonance frequency, notch filter (parameter P2-23 and P2-24) can
directly eliminate the resonance. The frequency setting range of notch filter is merely
from 50 to 1000Hz. The suppression strength is increased from 0 to 32dB. If the
resonance frequency is not within the range, it is suggested to use low-pass filter
(parameter P2-25).
Here firstly illustrates the influence brought by notch filter (P2-23 and P2-24) and
low-pass filter (P2-25). The following diagrams are the system of open-loop gain with
resonance.
Resonance suppression with notch filter
Gain
Frequency
Gain
Frequency
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