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Controller Design and Validation of Radial Active Magnetic Bearing Systems Considering Dynamical Changes Due To Rotational Speeds

회전속도에 따른 동역학적 변화를 고려한 반경방향 능동 자기베어링 시스템의 제어기 설계 및 검증

  • Jeong, Jin Hong (Dept. of Mechatronics Engineering, Chungnam Nat'l Univ.) ;
  • Yoo, Seong Yeol (Maritime & Ocean Engineering Research Institute, Korea Institute of Ocean Science & Technology) ;
  • Noh, Myounggyu (Dept. of Mechatronics Engineering, Chungnam Nat'l Univ.)
  • 정진홍 (충남대학교 메카트로닉스공학과) ;
  • 유승열 (한국해양과학기술원 해양시스템연구부) ;
  • 노명규 (충남대학교 메카트로닉스공학과)
  • Received : 2013.08.10
  • Accepted : 2014.06.23
  • Published : 2014.09.01

Abstract

If a rotor possesses a high gyroscopic coupling or the running speed is high, the dynamical changes in the rotor become prominent. When active magnetic bearings are used to support such rotors, it is necessary for the bearing controller to take these dynamical changes into consideration. Independent-axis controllers, which are the most commonly used, modulate the bearing force solely based on the sensor output of the same axis. However, this type of controller has difficulties in overcoming the dynamical changes. On the other hand, mixed-axis controllers transform the sensor output into components corresponding to the vibrational modes. A separate controller can then be designed for each vibrational mode. In this way, the controller can be designed based on the dynamics of the rotor. In this paper, we describe a design process for a mixed-axis controller that uses a detailed mathematical model of the system. The performance of the controller is evaluated based on the ISO sensitivity requirements and unbalance response, while considering the change in the system dynamics due to the running speed.

Keywords

Active Magnetic Bearing;Mixed-Axis Control;Independent-Axis Control;Control Design

Acknowledgement

Supported by : 충남대학교

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