Abstract
Based on this paper, multifrequency composite synchronization of three inductor motors with the method of fixed speed ratio in a vibration system is investigated. The multifrequency composite synchronization consists of self-synchronization and multifrequency controlled synchronization. In the self-synchronization part, motor 1 and motor 2 can implement the self-synchronization motion in the vibration system. In the part of multifrequency controlled synchronization, motor 3 traces motor 1 with the fuzzy PID method based on a modified master–slave controlling strategy. To satisfy the need in engineering, the stable phase difference should be implemented in the vibration system. The feasibility of the theory is analyzed by the numerical simulation and some discussions about the arbitrariness of the multifrequency parameter are listed. And then, based on a vibrating test bench driven by three eccentric motors (ERs), some experiments are given to certify the effectiveness of the proposed method of multifrequency composite synchronization. Meanwhile, a priority in the multifrequency composite synchronization motion is proposed. The self-synchronization is first realized and then the controlled synchronization is. Finally, from the numerical and experiment results, it is inferred that the zero phase difference between motors 1 and motor 2 as well as the multifrequency phase difference between motors 1 and 3 can't be realized in the multifrequency self-synchronization. However, with the fixed frequency ratio method based on the fuzzy PID controlling method, the results above can be realized in the multifrequency composite synchronization.
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