Journal of Applied Mathematics

Nonlinear Control of an Active Magnetic Bearing System Achieved Using a Fuzzy Control with Radial Basis Function Neural Network

Seng-Chi Chen, Van-Sum Nguyen, Dinh-Kha Le, and Nguyen Thi Hoai Nam

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Abstract

Studies on active magnetic bearing (AMB) systems are increasing in popularity and practical applications. Magnetic bearings cause less noise, friction, and vibration than the conventional mechanical bearings; however, the control of AMB systems requires further investigation. The magnetic force has a highly nonlinear relation to the control current and the air gap. This paper proposes an intelligent control method for positioning an AMB system that uses a neural fuzzy controller (NFC). The mathematical model of an AMB system comprises identification followed by collection of information from this system. A fuzzy logic controller (FLC), the parameters of which are adjusted using a radial basis function neural network (RBFNN), is applied to the unbalanced vibration in an AMB system. The AMB system exhibited a satisfactory control performance, with low overshoot, and produced improved transient and steady-state responses under various operating conditions. The NFC has been verified on a prototype AMB system. The proposed controller can be feasibly applied to AMB systems exposed to various external disturbances; demonstrating the effectiveness of the NFC with self-learning and self-improving capacities is proven.

Article information

Source
J. Appl. Math., Volume 2014 (2014), Article ID 272391, 18 pages.

Dates
First available in Project Euclid: 2 March 2015

Permanent link to this document
https://projecteuclid.org/euclid.jam/1425306061

Digital Object Identifier
doi:10.1155/2014/272391

Citation

Chen, Seng-Chi; Nguyen, Van-Sum; Le, Dinh-Kha; Nam, Nguyen Thi Hoai. Nonlinear Control of an Active Magnetic Bearing System Achieved Using a Fuzzy Control with Radial Basis Function Neural Network. J. Appl. Math. 2014 (2014), Article ID 272391, 18 pages. doi:10.1155/2014/272391. https://projecteuclid.org/euclid.jam/1425306061


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