Stabilization of the Magnetic Levitation System

This paper contributes toward research on the control of magnetic levitation plant, representing a typical nonlinear unstable system that can be controlled by various methods. shows two approaches to solution controller design based different closed loop requirements. Starting from known linear plant model—the first method is two-step procedure. In step, transfer function modified get stable non-oscillatory system. next required first-order dynamic defined and model-based PI proposed. The time constant this approach then used as tuning parameter. second set methods simplified ultra-local approximation dynamics double-integrator plus dead-time (DIPDT) model. Similar method, one possible stabilize PD combined with low-pass filter. To eliminate offset, stabilized supplemented simple static feedforward, or proposed means an internal model (IMC). Another apply for DIPDT directly stabilizing PID controller. considered solutions are compared system, via MATLAB/Simulink environment. It shown that, all three controllers, integral action, yield much slower than control, which gives motivation look alternative ways steady-state error compensation, guaranteeing faster setpoint step responses.