傅宇蕾 (2022-02-28 18:08):
#paper Dexterous magnetic manipulation of conductive non-magnetic objects. #DOI: 10.1038/s41586-021-03966-6 这是一篇通过对非磁性材料进行操控的文章,利用磁场(由永磁、电磁或超导产生)和感生的磁场(由感生或,或铁磁材料产生),相互做哟个形成的里进行操控。区别于小轩,操控用到的是三自由度的过程。优点在于针对导电材料可以实现非接触操控,缺点在于力小,速度慢,实时性差。针对空间场景来说,目前离应用较远。
IF:50.500Q1 Nature, 2021-10. DOI: 10.1038/s41586-021-03966-6 PMID: 34671137
Dexterous magnetic manipulation of conductive non-magnetic objects
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Abstract:
Dexterous magnetic manipulation of ferromagnetic objects is well established, with three to six degrees of freedom possible depending on object geometry. There are objects for which non-contact dexterous manipulation is desirable that do not contain an appreciable amount of ferromagnetic material but do contain electrically conductive material. Time-varying magnetic fields generate eddy currents in conductive materials, with resulting forces and torques due to the interaction of the eddy currents with the magnetic field. This phenomenon has previously been used to induce drag to reduce the motion of objects as they pass through a static field, or to apply force on an object in a single direction using a dynamic field, but has not been used to perform the type of dexterous manipulation of conductive objects that has been demonstrated with ferromagnetic objects. Here we show that manipulation, with six degrees of freedom, of conductive objects is possible by using multiple rotating magnetic dipole fields. Using dimensional analysis, combined with multiphysics numerical simulations and experimental verification, we characterize the forces and torques generated on a conductive sphere in a rotating magnetic dipole field. With the resulting model, we perform dexterous manipulation in simulations and physical experiments.
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