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research-article

Design of magnetic bearing control system based on active disturbance rejection theory

[+] Author and Article Information
Chaowu Jin

College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
jinchaowu@nuaa.edu.cn

Kaixuan Guo

College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
13770575122@163.com

Yuanping Xu

College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China, Laboratory of Robotic Systems, Ecole Polytechnique Federale Lausanne (EPFL), Lausanne 1015, Switzerland
ypxu@nuaa.edu.cn

Hengbin Cui

College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
cuihengbin1993@foxmail.com

Longxiang Xu

College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
fqp@nuaa.edu.cn

1Corresponding author.

ASME doi:10.1115/1.4040837 History: Received November 15, 2017; Revised July 03, 2018

Abstract

At present, most of the magnetic bearing system adopts the classical PID control strategy. However, the external disturbances, system parameter perturbations and many other uncertain disturbances result in PID controller difficult to achieve high performance. To solve this problem, a linear active disturbance rejection controller (LADRC) based on ADRC theory was designed for magnetic bearing. According to the actual prototype parameters, the simulation model was built in Matlab/Simulink. The step and sinusoidal disturbances with PID and LADRC control strategies were simulated and compared. Then, the experiments of step and sinusoidal disturbances were performed. When control parameters are consistent, the experiment showed that the rotor displacement fluctuation decreased by 28.6% using the LADRC than PID control under step disturbances and decreased by around 25.8% under sinusoidal disturbances. When the rotor is running at 24000r/min and 27000r/min, the displacement of rotor are reduced by around 15% and 13.7 %, respectively. Rotate the rotor with step disturbances and sinusoidal disturbances. It can also be seen that LADRC has the advantages of fast response time and good anti-interference. The experiments indicate that the LADRC has better anti-interference performance compared with PID controller.

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