High-Gain observer based fractional order sliding mode control for conical active magnetic bearing
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https://doi.org/10.54939/1859-1043.j.mst.FEE.2023.35-41Keywords:
Conical active magnetic bearing; High gain observer; Fractional order sliding mode control.Abstract
The Conical Active Magnetic Bearing (CAMB) presents inherent complexity owing to its nonlinear characteristics, which requires us to develop an accurate mathematical model as well as an appropriate controller. This paper proposes a control system using an observer called the High-Gain Observer (HGO) to estimate the states of the CAMB system. Based on the HGO observer, a fractional-order sliding mode controller is designed, referred to as FOSMC-HGO (Fractional-Order Sliding Mode Control based on High-Gain Observer). The advantage of this controller lies in the combination of the benefits of the HGO observer and the fractional-order sliding mode control. Finally, MATLAB/SIMULINK simulation results demonstrate the effectiveness of the FOSMC-HGO controller, enhancing the system's faster response time and improved noise rejection capability. Additionally, the simulation results showcase the controller's ability to stabilize the system within a very short time.
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