Integral variable-structure grey control for magnetic levitation system

Author

Chiang, H.-K. ; Chen, C.-A. ; Li, M.-Y.

Author_Institution

Dept. of Electr. Eng., Nat. Yunlin Univ. of Sci. & Technol., Douliu

Volume

153

Issue

6

fYear

2006

fDate

11/1/2006 12:00:00 AM

Firstpage

809

Lastpage

814

Abstract

An integral variable-structure grey control for a magnetic levitation system for position tracking is presented. The sliding-mode control is insensitive to system uncertainties and disturbances when it is within expected limits. It produces chattering when uncertainty values are overestimated, or steady-state error when underestimated. The method uses a mathematically simple and computationally efficient grey compensator for the integral variable structure controller to reduce chattering and steady-state error. The stability of this magnetic levitation system is proven by using the Lyapunov function. The experimental results verify that the proposed controller is valid for a magnetic levitation system

Keywords

Lyapunov methods; grey systems; magnetic levitation; mathematical analysis; position control; stability; tracking; variable structure systems; Lyapunov function; compensator; integral variable-structure grey control; magnetic levitation system; mathematical analysis; position tracking; sliding-mode control; stability; steady-state error; uncertain systems;

fLanguage

English

Journal_Title

Electric Power Applications, IEE Proceedings -

Publisher

iet

ISSN

1350-2352

Type

jour

DOI

10.1049/ip-epa:20060056

Filename

4015867