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Integral variable-structure grey control for magnetic levitation system

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3 Author(s)
Chiang, H.-K. ; Dept. of Electr. Eng., Nat. Yunlin Univ. of Sci. & Technol., Douliu ; Chen, C.-A. ; Li, M.-Y.

An integral variable-structure grey control for a magnetic levitation system for position tracking is presented. The sliding-mode control is insensitive to system uncertainties and disturbances when it is within expected limits. It produces chattering when uncertainty values are overestimated, or steady-state error when underestimated. The method uses a mathematically simple and computationally efficient grey compensator for the integral variable structure controller to reduce chattering and steady-state error. The stability of this magnetic levitation system is proven by using the Lyapunov function. The experimental results verify that the proposed controller is valid for a magnetic levitation system

Published in:

Electric Power Applications, IEE Proceedings -  (Volume:153 ,  Issue: 6 )