中文

Journal of Applied Sciences ›› 2002, Vol. 20 ›› Issue (1): 55-60.

• Articles • Previous Articles     Next Articles

A Study and Discussion on a Controller for Radial Four-degree Freedom Active Magnetic Bearing

ZHU Huang-qiu1, XU Long-xiang2   

  1. 1. School of Electrical and Informational Engineering, Jiangsu University, Zhenjing 212013, China;
    2. Department of mechanical Engineering, Nanjing University of Aeronautics & Astronautics, Nanjing 210016, China
  • Received:2001-02-13 Revised:2001-05-07 Online:2002-03-31 Published:2002-03-31

PDF

167

Cited

5

Abstract: This paper, basing on the state equation of a radial four degree freedom magnetic bearing, presents the steps in using the linear quadratic method of the optimal control theory to design a centralized and decentralized parameters control system. Matlab language is also used to carry out simulation comparison, which proves that the difference is small. In this paper, the structure of hardware and software based on the digital signal processor, the method of debugging and the experimentation result are presented in brief. The vibration amplitude of rotor is about 20μm when the speed of rotor runs between 0 to 60000r/min. The experiment shows that the decentralized controller based on the linear quadratic method meets the demands of active magnetic bearing system. This method may be used for reference in the study and designing of controllers for active magnetic bearing.

Key words: active magnetic bearing, state equation, optimal control theory, controller, digital signal processor (DSP)

CLC Number: