Nonlinear Positioning Technique via Dynamic Current Cut-Off Frequency and Observer-Based Pole-Zero Cancellation Approaches for MAGLEV Applications

This article solves the problem caused by high level current feedback gain setting for fast responsiveness of magnetic levitation systems considering the current dynamics and presents advanced nonlinear positioning technology without plant parameter information. The main features of this study are s...

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Bibliographic Details
Published inIEEE access Vol. 10; pp. 70143 - 70153
Main Authors You, Sung Hyun, Kim, Ki-Chan, Kang, Hyun Ho, Kim, Kwan Soo, Kim, Seok-Kyoon
Format Journal Article
LanguageEnglish
Published Piscataway IEEE 2022
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Control theory
Cutoff frequency
disturbance observer
Electromagnets
Feedback loop
Feedback loops
Inductance
Magnetic levitation
Observers
Parameters
Position control
positioning
Resistance
variable cut-off frequency
velocity observer
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Summary:This article solves the problem caused by high level current feedback gain setting for fast responsiveness of magnetic levitation systems considering the current dynamics and presents advanced nonlinear positioning technology without plant parameter information. The main features of this study are summarized as follows: First, current control demonstrates current ripple reduction and overall performance guarantee through a low feedback gain in the steady state, including a dynamic feedback loop increased by an error variable magnitude in the transient period. Second, the plant parameter information-free velocity observer replaces the observer output error integral action with the disturbance estimation action to improve the closed-loop performance. The simulation results reveal the practical advantages derived from the contributions of this study.
ISSN:2169-3536
2169-3536
DOI:10.1109/ACCESS.2022.3187003