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Zhu Huangqiu
School of Electrical and
Informational
Engineering,
Jiangsu University,
Zhenjiang 212013, China |
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CONTROL SYSTEM OF MAGNETIC
BEARINGS BASED
ON LINEAR
QUADRATIC METHOD
OF OPTIMAL
CONTROL STRATEGY *
Abstract: A state equation for radical 4-degree-of-freedom active magnetic bearings is built, and the approach on how to use linear quadratic method of optical control theory to design a centralized and decentralized parameters control system is introduced, and also Matlab language is used to simulate and analyze. The simulation results have proved that the differences are small between centralized parameters and decentralized parameters control system. The conclusions of experiments have shown that decentralized controllers designed from optimal state feedback theory meet the requirements of active magnetic bearing system. The vibration amplitude of the rotor is about 20 µm when the speed of the rotor runs between 0 to 60 000 r/min. This method may be used in the study and design of controllers of magnetic bearings.
Key words:
Active magnetic bearing State
equation Optical control theory Controller Digital signal
processor (DSP)
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