A4 Refereed article in a conference publication
Hybrid Time-Invariant and Time-Variant Linear Motion Control of a Levitating Platform
Authors: Zhuravlev, Andrei; Dodonov, Viktor; Madanzadeh, Sadjad; Putkonen, Atte; Chechurin, Leonid; Jastrzebski, Rafal P.
Editors: N/A
Conference name: IEEE International Electric Machines & Drives Conference
Publication year: 2025
Book title : 2025 IEEE International Electric Machines & Drives Conference (IEMDC)
First page : 613
Last page: 618
ISBN: 979-8-3503-7660-9
eISBN: 979-8-3503-7659-3
DOI: https://doi.org/10.1109/IEMDC60492.2025.11060951
Web address : https://ieeexplore.ieee.org/document/11060951
This paper investigates motion control strategies for a magnetically levitated (MAGLEV) motion platform actuated by a set of levitated linear flux-switching permanent magnet motors. The vertical levitation is decoupled from the horizontal motion and controlled using an H∞ controller, while the focus here is on horizontal thrust control under varying payload conditions and plant uncertainties. PID, H2, and H∞ controllers are designed within a two-degree-of-freedom signal-based framework. The controllers are synthesized to yield a similar settling time. First, the H2, and H∞ controllers are synthesized using the same weighting functions reflecting desired reference tracking and disturbance rejection. Second, a finite-horizon optimal feedback controller is designed as a time-variant solution for ideal conditions. Finally, all controllers are tested on a high-fidelity engineering verification model with actuator dynamics captured via finite element method based lookup tables. Time- and frequency-domain simulations demonstrate that the H∞ controller provides the most robust disturbance rejection, while the finite-horizon controller offers optimal transient performance in the absence of uncertainties. The results highlight trade-offs between performance and robustness, contributing to the development of advanced control strategies for precision MAGLEV systems.
Funding information in the publication:
This work was supported Business Finland (Dnro 1803/31/2022, Linear Precision Motion Platform [Levitan]), by the Research Council of Finland’s Centre of Excellence in High-Speed Energy Conversion Systems, and in part by the Tohtoristipendi 2021 at LUT University.