Dual LQG-PID control of a highly nonlinear magnetic levitation system

Author

ElSinawi, A.H. ; Emam, Shadi

Author_Institution

Dept. of Mech. Eng., American Univ. of Sharjah, Sharjah, United Arab Emirates

fYear

2011

fDate

19-21 April 2011

Firstpage

1

Lastpage

4

Abstract

A study of one-dimensional position control of a light iron ball levitated by one electromagnet is proposed in this work. The vertical position of the ball is the target of the proposed control strategy. It is assumed that the position measurement of the ball is inaccessible and thus, estimates of the position are utilized as the feedback signal to the controller. Control of the ball´s position is carried out using LQG-based controller with the objective of manipulating the electromagnet current to drive the ball to steady state with minimal error. The integrity of the controller as well as accuracy of the system´s model is evaluated via simulation.

Keywords

linear quadratic Gaussian control; magnetic levitation; magnetic variables control; nonlinear control systems; position control; three-term control; dual LQG-PID control; electromagnet current; feedback signal; light iron ball; nonlinear magnetic levitation system; position control; position measurement; Coils; Data models; Magnetic levitation; Magnetomechanical effects; Mathematical model; Vibrations; LQG-based controller; System identification; active control; magnetic levitation; position control;

fLanguage

English

Publisher

ieee

Conference_Titel

Modeling, Simulation and Applied Optimization (ICMSAO), 2011 4th International Conference on

Conference_Location

Kuala Lumpur

Print_ISBN

978-1-4577-0003-3

Type

conf

DOI

10.1109/ICMSAO.2011.5775601

Filename

5775601