Title :
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
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;
Conference_Titel :
Control and Decision Conference (CCDC), 2012 24th Chinese
Conference_Location :
Taiyuan
Print_ISBN :
978-1-4577-2073-4
DOI :
10.1109/CCDC.2012.6244520
