Abstract: Based on the conception of instantaneous motion center, a new virtual vibration system for dynamic balancing measurement is proposed. The structural features and the unbalancing response characteristics of this vibration system are analyzed in depth. The relation between the real measuring system and the virtual one is expounded. Theoretical analysis indicates that the flexibly hinged integrative spring sets holds the fixed vibration center and the excellent effect of plane separate. The sensors are mounted in the same measuring plane so as that the influence of the phase error on the unbalance reduction ratio is eliminated. Furthermore, the performance changes in sensors caused by environmental factor have less influence on the accuracy of the measurement. The result for this system is more accurate measurement with lower requirement for a second correction run. The experiment results validate the effectiveness of this vibratory system for high precision dynamic balancing measurement.

Key words: Dynamic balancing, Instantaneous motion center, Piezoelectric sensor, Plane separate, Vibration system, Coordination equation Curve corner Critical curvature S curve acceleration/deceleration