Title :
System identification and re-engineering controllers for a magnetic bearing system
Author :
Shi, J. ; Revell, J.
Author_Institution :
Fac. of Eng. & Sci., Victoria Univ. of Technol., Melbourne, Vic., Australia
Abstract :
In this paper, a model of an MBC 500 magnetic bearing system is identified using data collected in the frequency domain. The difficulties encountered in system identification using the MATLAB μ-Analysis and Synthesis toolbox are addressed. Since there are two resonant modes that threaten the stability of the system, two resonant frequencies have been correctly identified and then notched out by using two notch filters. Lead compensators have been designed to stabilise the four axial channels of the magnetic bearing system. The problem with attempting to design a lead compensator with too large a phase margin is also addressed. Finally, the designed notch filters and lead compensators are implemented in real-time.
Keywords :
closed loop systems; compensation; control system synthesis; frequency estimation; frequency-domain analysis; identification; magnetic bearings; notch filters; real-time systems; MATLAB μ-Analysis and Synthesis toolbox; MBC 500 magnetic bearing system; axial channel stabilisation; closed-loop system identification; frequency domain data; lead compensators; magnetic bearing system; notch filters; phase margin; re-engineering controllers; real-time implementation; resonant frequencies; resonant modes; system identification; system stability; Control system synthesis; Control systems; Filters; Frequency domain analysis; MATLAB; Magnetic levitation; Magnetic resonance; Magnetic separation; Mathematical model; System identification;
Conference_Titel :
TENCON '02. Proceedings. 2002 IEEE Region 10 Conference on Computers, Communications, Control and Power Engineering
Print_ISBN :
0-7803-7490-8
DOI :
10.1109/TENCON.2002.1182635
