Design of second-order sliding mode controller for Electromagnetic Levitation Grip used in CNC

Author

Chunfang, Liu ; Jian, Zhang

Author_Institution

Sch. of Electr. Eng., Shenyang Univ. of Technol., Shenyang, China

fYear

2012

fDate

23-25 May 2012

Firstpage

3282

Lastpage

3285

Abstract

A novel second-order sliding model controller aiming at the inherent chattering of classical sliding mode control for high-precision air gap control of Electromagnetic Levitation Grip used in CNC(Computerized Numerical Control) was proposed, and the control strategies based on super-twisting algorithm was designed. Electromagnetic Levitation Grip is a very complex system with real parameter uncertainties and external disturbances in the process of air gap control. This method can eliminate the chattering which may excite high frequency chattering, keep the robustness of system, and effectively improve the dynamic response of system. Simulation results demonstrate that the design of Second-order sliding mode controller can achieve the better stability of suspension, strong immunity and high stiffness.

Keywords

computerised numerical control; control nonlinearities; control system synthesis; dynamic response; elasticity; magnetic levitation; stability; suspensions (mechanical components); variable structure systems; CNC; chattering elimination; computerized numerical control; dynamic response improvement; electromagnetic levitation grip; high frequency chattering; high-precision air gap control; parameter uncertainties; second-order sliding mode controller design; stiffness; super-twisting algorithm; suspension stability; Algorithm design and analysis; Electromagnetics; Magnetic levitation; Mathematical model; Sliding mode control; Suspensions; Electromagnetic Levitation system; chattering; second-order sliding mode; super-twisting algorithm;

fLanguage

English

Publisher

ieee

Conference_Titel

Control and Decision Conference (CCDC), 2012 24th Chinese

Conference_Location

Taiyuan

Print_ISBN

978-1-4577-2073-4

Type

conf

DOI

10.1109/CCDC.2012.6244520

Filename

6244520