Next Article in Journal
Evaluation and Intercomparison of MODIS and GEOV1 Global Leaf Area Index Products over Four Sites in North China
Next Article in Special Issue
Strong Ferromagnetically-Coupled Spin Valve Sensor Devices for Droplet Magnetofluidics
Previous Article in Journal
Expected Improvements in the Quantitative Remote Sensing of Optically Complex Waters with the Use of an Optically Fast Hyperspectral Spectrometer—A Modeling Study
Article Menu

Export Article

Open AccessArticle
Sensors 2015, 15(3), 6174-6195; doi:10.3390/s150306174

Digital Control Analysis and Design of a Field-Sensed Magnetic Suspension System

1
Department of Electrical Engineering, Kun Shan University, 195 Kunda Road, Yongkang District, Tainan City 710, Taiwan
2
Department of Electrical Engineering, Southern Taiwan University of Science and Technology, 1 Nan Ti Street, Yongkang District, Tainan City 710, Taiwan
*
Author to whom correspondence should be addressed.
Academic Editor: Andreas Hütten
Received: 20 December 2014 / Revised: 11 February 2015 / Accepted: 6 March 2015 / Published: 13 March 2015
(This article belongs to the Special Issue Magnetic Sensor Device-Part 1)

Abstract

Magnetic suspension systems are mechatronic systems and crucial in several engineering applications, such as the levitation of high-speed trains, frictionless bearings, and wind tunnels. Magnetic suspension systems are nonlinear and unstable systems; therefore, they are suitable educational benchmarks for testing various modeling and control methods. This paper presents the digital modeling and control of magnetic suspension systems. First, the magnetic suspension system is stabilized using a digital proportional-derivative controller. Subsequently, the digital model is identified using recursive algorithms. Finally, a digital mixed linear quadratic regulator (LQR)/H∞ control is adopted to stabilize the magnetic suspension system robustly. Simulation examples and a real-world example are provided to demonstrate the practicality of the study results. In this study, a digital magnetic suspension system model was developed and reviewed. In addition, equivalent state and output feedback controls for magnetic suspension systems were developed. Using this method, the controller design for magnetic suspension systems was simplified, which is the novel contribution of this study. In addition, this paper proposes a complete digital controller design procedure for magnetic suspension systems. View Full-Text
Keywords: magnetic field sensor; magnetic suspension system; digital model; output feedback control; state feedback control; mixed LQR/H∞ control magnetic field sensor; magnetic suspension system; digital model; output feedback control; state feedback control; mixed LQR/H∞ control
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

Scifeed alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

MDPI and ACS Style

Li, J.-H.; Chiou, J.-S. Digital Control Analysis and Design of a Field-Sensed Magnetic Suspension System. Sensors 2015, 15, 6174-6195.

Show more citation formats Show less citations formats

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Sensors EISSN 1424-8220 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top