A Preliminary Study on Synchronization Realized by Magnetically Coupled Cantilevers

Abstract

We present the synchronization phenomenon of magnetically coupled cantilevers for the first time. two kinds of magnetic coupling method are promoted. The first one takes advantage of electromagnetic induction phenomenon between permanent magnet and induction coil, which consists of a magnetic cantilever covered by permanent magnet blocks and a T-shape cantilever with a conductive rectangular ring in the free end. Theoretically there exists an internal force feedback loop, which is necessary for phase synchronization, meaning this contactless coupling method holds a great possibility to realize synchronization. Since magnetically realized synchronization of cantilevers is a barely researched field, we promote the second structure to do some numerical study, which uses direct magnet coupling of two permanent magnet blocks located in the free end of the two cantilevers. Numeric simulation of the solid-magnetic interaction coupling process is performed via COMSOL Multiphysics. From simulation result, we find out that there exist several frequency points that the frequency of the driven cantilever is exactly doubled as design, meaning that there is a great possibility that this is the very synchronization state we are searching for, yet more precise simulation and experimental result is needed to ensure that. Both design have a potential possibility to realize magnetic synchronization of cantilevers. The first design exhibits a great possibility that the cantilever can reach contactless synchronize theoretically. Yet the other design is more appropriate to perform preliminary stage numerical and experimental study to explore the unique physics phenomenon of magnetic synchronization of cantilevers so as to provide necessary information to perform the second stage of study using the first design.