Translated Title
Two-Degree-of-Freedom Maglev Platform for Micro Machining
Translated Abstract
In order to eliminate mechanical friction in the mobile laser table for micro machining,a new maglev platform jointly driven by three sets of levitated subunits was proposed in this paper.Firstly,the platform structure and working principle were introduced.The three sets of subunits had the same structure,consisting of permanent magnets and electromagnetic coils;the force of the coils applying on the permanent magnets was analyzed,and the plane range in which the maglev platform could achieve stable levitation was discussed.Secondly,the in-plane dynamics model of the maglev platform was established,and the equation of the transformation relationship between the displacement of the subunit and that of the platform was built.Subsequently,based on the decentralized control strategy,the corresponding fuzzy proportional-derivative controller of the subunit system was designed.Finally,a physical platform was built,and the static levitation experiment,step response experiment,and two-axis combined working experiment were conducted on the platform.The results show that the maglev platform can ignore the motion control in the vertical direction within the plane range of±2 mm,and it has a root mean squared error in the x direction of only 2.95 μm and a maximum tracking error of 11 μm during static levitation.Meanwhile,the maglev platform has a motion displacement of 4 mm and two-axis combined working ability.
Translated Keyword
decentralized control
finite element simulation
fuzzy proportional-derivative(PD)control
maglev platform
Access Number
WF:perioarticalxnjtdxxb202306013
