Stabilization of magnetic suspension system by using only a first-order reset element without a derivative element

Yuji Ishino, Takeshi Mizuno, Masaya Takasaki, Daisuke Yamaguchi

Research output: Contribution to journalArticlepeer-review

Abstract

The stabilization of a magnetic suspension system is achieved by using a low-pass filter (LPF) with a nonlinear integrator without any other element. A proportional-derivative (PD) control is commonly used as the simplest method of stabilizing a magnetic suspension system. Meanwhile, a first-order reset element (FORE) was applied to improve transient characteristics. The original FORE was a first-order LPF with a nonlinear reset integrator element. A magnetic suspension system cannot be stabilized by a linear LPF, nor the original FORE. In this work, the reset conditions of the FORE were modified for magnetic suspension. This modified FORE succeeded in stabilizing a magnetic suspension system. The efficacy of the modified FORE was demonstrated by simulations and experiments. A single degree of freedom magnetic suspension system was used in the experiment.

Original languageEnglish
Article number24
JournalActuators
Volume8
Issue number1
DOIs
Publication statusPublished - 2019
Externally publishedYes

Keywords

  • Clegg's integrator
  • First-order reset element
  • Magnetic suspension
  • Nonlinear controller
  • Reset control

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Control and Optimization

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