Dynamics and adaptive backstepping control of rotor-hybrid foil-magnetic bearings system

Author:

Guan Hanqing12ORCID,Li Jiajun1,Wei Kexiang1,Chu Shenggui1,Guan Yueqi3,Wen Changyun2

Affiliation:

1. Hunan Provincial Key Laboratory of Vehicle Power and Transmission System, Hunan Institute of Engineering, Xiangtan, P.R China

2. School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore, Singapore

3. School of Intelligent Manufacturing and Automotive Engineering, Guangdong Vocational and Technical University of Business and Technology, Zhaoqing, P.R China

Abstract

The hybrid foil-magnetic bearing (HFMB) is a contactless-type bearing composed of a foil bearing (FB) in the inner side and an active magnetic bearing (AMB) in the outer side. It has the advantages of low drag torque, high DN value (bearing inner diameter times rotating speed), and high supporting efficiency. However, significant subsynchronous vibration will degrade the stability of the rotor-HFMBs system, which is an obstacle to the industrial implementation of HFMBs. To control the rotor vibration, this paper presents a dynamic model of the rotor-HFMBs system with unknown parameters and the design of an adaptive backstepping controller (ABC) for it. The stability of the closed-loop system is established. Simulation results of the rotor-HFMBs system controlled by ABC are compared with the proportional-integral-derivative controller (PID), illustrating that the ABC is capable of eliminating rotor vibration, and it is more effective than the PID.

Funder

National Natural Science Foundation of China

China Association for Science and Technology

Natural Science Foundation of Hunan Province

Publisher

SAGE Publications

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