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Integral variable-structure grey control for magnetic levitation system

Integral variable-structure grey control for magnetic levitation system

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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.

References

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http://iet.metastore.ingenta.com/content/journals/10.1049/ip-epa_20060056
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