| Title |
Dynamic Axial Displacement Control of Axial Magnetic Bearing Using Sliding Mode Control Technique |
| Authors |
박주홍(Joo-Hong Park) ; 노수진(Sujin Noh) ; 조한욱(Han-Wook Cho) |
| DOI |
https://doi.org/10.5370/KIEE.2025.74.9.1521 |
| Keywords |
Magnetic bearing; Sliding mode control (SMC); Axial load support; Lyapunov stability; Full-state observer |
| Abstract |
This paper proposes the application of a sliding mode controller (SMC), known for its robustness to nonlinearity, uncertainty, and external disturbances, to an axial magnetic bearing system that requires continuous support under high axial loads. Force and current coefficients are derived from magnetic circuit analysis and incorporated into the control parameters. The control input is designed based on Lyapunov stability theory. In addition, a full-state observer is developed to estimate the rotor speed, the derivative of displacement, and disturbances. Simulations and experiments conducted in MATLAB/Simulink verify that the proposed SMC provides excellent disturbance rejection and robustness. |