Electrical vibration damper

A method of reducing stationary vibrations in revolving systems by using a vibration-damper system with a two-phase servomotor is proposed. The additional vibration source adopted here eliminates the vibration within one sampling period by using a sampled-data control system which makes use of the finite-settling-time method. The system is demonstrated by applying the additional vibration source to eliminate the second-harmonic vibration produced by the two-phase servomotor of a speed-control system. Tests on the system indicate that the vibration on the shaft can be reduced to zero.