Ervin Alvarez-Sánchez

Modeling and controller design of a magnetic levitation system

In this paper, the nonlinear mathematical model with five DOFs of a magnetic levitation system is developed and analyzed. Then a second order sliding mode controller is proposed to regulate the levitation to a desired position, stabilize the other 4 DOFs in the nonlinear system and compensate the unknown increments on the load. Simulation results are presented to show the effectiveness of the proposed controller.

Experimental setup for the sensorless rotor position control of a permanent magnet stepper motor

An experimental setup is presented for the implementation and testing of a rotor position control of a permanent magnet (PM) stepper motor that does not need the measurement of mechanical signals. The control scheme proposed here has been designed using the singular perturbation and sliding mode methodologies.

Dynamical Sliding Mode Control of a MagLev System with 3 DOFs: Experimental Results

In this paper we present the mathematical model for a MagLev system with 3 DOFs. A dynamical sliding mode controller is proposed to regulate the levitation to a desired position and stabilize the rotational movements. Finally the mathematical model and the controller are validated and evaluated by means of some experimental tests.

A maglev system: modeling and controller design

In this paper, the nonlinear mathematical model with five DOFs (degrees-of-freedom) of a magnetic levitation system is developed and analyzed. Then a second order sliding mode controller is proposed to regulate the levitation to a desired position, stabilize the other 4 DOFs in the nonlinear system and compensate the unknown increments on the load. Simulation results are presented to show the effectiveness of the proposed controller