The effect of different parameters on the controller performance for a DC attraction type levitation system-a simulation study.

The basic parameters for an electromagnetic levitation systems are inductance and resistance of the actuator, input DC link voltage, mass of the payload, air-gap between the pole face of the magnet and ferromagnetic guide-way etc. All these parameters are supposed to get change in real life situation. Electromagnetic levitation system (EMLS) is inherently unstable and strongly nonlinear in nature. In most cases a classical controller has been designed for the linear model around an operating point for maintaining overall closed-loop stability. So the performances of the linear controller with the change in different parameters have been studied. The parameters of the designed controller also get varied during experimentation. So a sensitivity study of the controller for an EMLS is also important.