Open AccessBackstepping control of three‐pole radial hybrid magnetic bearing
Author(s) -
Wu Mengyao,
Zhu Huangqiu
Publication year - 2020
Publication title -
iet electric power applications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.815
H-Index - 97
eISSN - 1751-8679
pISSN - 1751-8660
DOI - 10.1049/iet-epa.2019.1008
Subject(s) - backstepping , control theory (sociology) , robustness (evolution) , pid controller , lyapunov function , lyapunov stability , full state feedback , controller (irrigation) , control engineering , computer science , engineering , mathematics , adaptive control , nonlinear system , physics , control (management) , temperature control , artificial intelligence , agronomy , biochemistry , chemistry , quantum mechanics , biology , gene
To improve dynamic performance and robustness of a three‐pole radial hybrid magnetic bearing (HMB), a backstepping controller is designed in this study. After introducing configuration of the three‐pole radial HMB, the mathematical model is established by using the equivalent magnetic circuit method, and then the state equations are derived. Based on the state equations, the backstepping controller is designed by conducting backstepping algorithm and Lyapunov theorem which is adopted to confirm the stability of the system. Aiming at the difficulty of parameter adjustment, the adjustment factor is introduced through theoretical analysis. And the suitable value range of regulation factor is given by simulation. To identify the validity of the presented controller, the backstepping controller and the proportional–integral–derivative (PID) controller are compared by simulation and experiment. Simulation and experimental results have verified that the dynamic performance and the robustness of the backstepping controller are superior to the PID controller.