Mitsubishi Electric MELSERVO MRJ2S-B, Instruction Manual

Page: 126 / 200

Special adjustment functions Filter functions
5 - 4
5.1.2 Adaptive vibration suppression control
Adaptive vibration suppression control is a function in which the servo amplifier detects machine
resonance and sets the filter characteristics automatically to suppress mechanical system
vibration. Since the filter characteristics (frequency, attenuation) are set automatically, you need
not be conscious of the resonance frequency of a mechanical system. Also, while adaptive
vibration suppression control is valid, the servo amplifier always detects machine resonance,
and if the resonance frequency changes, it changes the filter characteristics in response to that
frequency.
S000878C
Fig. 5-4: Mode of operation of adaptive vibration suppression
NOTES
The machine resonance frequency which adaptive vibration suppression control can
respond to is about 150 to 500Hz. Adaptive vibration suppression control has no effect on
the resonance frequency outside this range.
Adaptive vibration suppression control may provide no effect on a mechanical system which
has complex resonance characteristics or which has too large resonance.
Under operating conditions in which sudden disturbance torque is imposed during operation,
the detection of the resonance frequency may malfunction temporarily, causing machine
vibration. In such a case, set adaptive vibration suppression control to be "held" (parameter
No. 25: "
2 ") to fix the characteristics of the adaptive vibration suppression control filter.
Mechanical
system
response level
Resonance point
Frequency
Resonance point
Frequency
Frequency
Frequency
Notch frequency Notch frequency
Filter curve Filter curve
Mechanical
system
response level
When machine resonance is large
and frequency is low
When machine resonance is small
and frequency is high