曲げ振動を考慮した単純支持棒の磁気浮上制御

概要

論文の詳細を見る
Magnetic levitation has various advantages because it can support substance without any lubricants. A magnetically levitated object with a servo loop occasionally exhibits elastic vibration when its bearing stiffness is raised. This paper clarifies this phenomenon and shows a method to obtain higher stiffness. The model of the magnetic levitation is a straight bar pinned at one end and suspended at a certain point by an electromagnet without any touching. The equations of motion and of an electromagnet circuit are derived considering transverse elastic vibration. Computation shows that higher order vibratioI; may diverges when feedback coefficients are made large in the absence of higher order vibration mode feedback loop, Amethod which enables to make the servo mechanism stable in respect to higher modes as well as the fundamental mode has been made clear using the modern control theory. The results have been also experimentally confirmed in regard to both static and dynamic response. This method is one application of distributed system feedback control.
公益社団法人精密工学会の論文
1983-09-05