Article ID: 21006767
A control structure for vibration suppression is proposed to improve positioning speed and accuracy. Acceleration feedback is well-known for suppressing residual vibrations and disturbances. In this study, our previously proposed load-side acceleration feedback (LSAFB) and machine stand acceleration feedback (MSAFB) controllers were simultaneously applied to a semi-closed servo system to use dual acceleration feedback for a positioning machine with rocking mode vibration and local resonance. The polarity of the LSAFB controller was negative, whereas that of the MSAFB controller was both positive and negative. Moreover, the MSAFB controller was updated for positioning machines with local resonance, and the LSAFB controller was modified to avoid interference with the MSAFB controller. The effectiveness of the proposed structure and its dual acceleration feedback were evaluated through root locus and frequency response analyses. This dual acceleration feedback was then evaluated through simulations and experiments.
