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Robust Fuzzy-Neural-Network Levitation Control Design for Linear Maglev Rail System with Nonnegative Inputs

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2 Author(s)
Rong-Jong Wai ; Dept. of Electr. Eng., Yuan Ze Univ., Chung-li ; Jeng-Dao Lee

The levitation control in a linear magnetic-levitation (Maglev) rail system is a subject of considerable scientific interest because of highly nonlinear behaviors. This study mainly designs a robust fuzzy-neural-network control (RFNNQ scheme for the levitated positioning of the linear Maglev rail system with nonnegative inputs. In the model-free RFNNC system, an on-line learning ability is designed to cope with the problem of chattering phenomena caused by the sign action in backstepping control (BSC) design, and to ensure the stability of the controlled system without the requirement of auxiliary compensated controllers despite the existence of uncertainties. Moreover, the nonnegative outputs of the RFNNC system can be directly supplied to electromagnets in the Maglev system without complicated control transformations for relaxing strict constrains in conventional model-based control methodologies. The effectiveness of the proposed control schemes for the levitation control of a Maglev system is verified by numerical simulations, and the superiority of the RFNNC system is indicated in comparison with the BSC system

Published in:

IEEE Industrial Electronics, IECON 2006 - 32nd Annual Conference on

Date of Conference:

6-10 Nov. 2006