Type-2 Fuzzy Logic Controller for Conical AMB-Rotor system

In the present work, the design of controller for complete support of a rotor by Conical Active Magnetic Bearings (AMBs) is presented. These bearings eliminate the requirement of an axial AMB which results in reduction of cost and required mounting space. The presented controller is designed with the aim to reduce the requirement of exact system modelling. Fuzzy logic controller (FLC) satisfies this requirement since it can be designed by the knowledge of system behaviour or performance. However, the determination of different parameters of FLC is based on the designer knowledge and experience about the operational characteristics of the system. In the present work, efforts are made to enhance the system performance by designing the Interval Type-2 fuzzy logic controller (IT2FLC) with uncertain bound algorithm. This structure is better suited for handling parameters uncertainty. The simulations are carried out and performance of the designed controller is validated by comparing it with that of normal FLC.