Magnetic Levitation System Control - SLIDING MODE CONTROL

SLIDING MODE CONTROL OF A MAGNETIC
LEVITATION SYSTEM
Introduction
Magnetic levitation systems have practical importance in many engineering systems such
as in high-speed maglev passenger trains, frictionless bearings, levitation of wind tunnel
models, vibration isolation of sensitive machinery, levitation of molten metal in induction
furnaces, and levitation of metal slabs during manufacturing. The maglev systems
can be classified as attractive systems or repulsive systems based on the source of levitation
forces. These kind of systems are usually open-loop unstable and are described by
highly nonlinear differential equations which present additional difficulties in controlling
these systems. Therefore, it is an important task to construct high-performance feedback
controllers for regulating the position of the levitated object.
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H∞CONTROL AND SLIDING MODE CONTROL OF MAGNETIC LEVITATION SYSTEM
ABSTRACT
In this paper, H∞disturbance attenuation control and sliding mode
disturbance estimation and compensation control of a magnetic levitation
system are studied. A magnetic levitation apparatus is established, and its
model is measured. Then the system model is feedback linearized. A H∞
controller is then designed. For comparison, a sliding mode controller and a
PID controller also were designed. Some experiments were performed to
compare the performance of the H∞controller, the sliding mode controller and
the PID controller.
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High performance variable structure control of
a magnetic levitation system
Abstract- In this paper the position-tracking problem of a
voltage-controlled magnetic levitation system is considered. It is
well known that the control problem is quite complicated and
challenging duo to inherent nonlinearities associated with the
electromechanical dynamics. A sliding mode control is employed
for controlling the system. The proposed controller exhibits
satisfactory robustness in response to parameter uncertainties.
Simulation results reveal the effectiveness of the proposed robust
controller.
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ADVANCED SLIDING MODE STABILIZATION OF A LEVITATION SYSTEM
Abstract
Levitation bearings are intrinsically unstable, nonlinear and
highly uncertain systems. In this paper, we focus our attention
on sliding mode controllers which allow robust design and
more particularly on second order sliding mode control which
appears very relevant with respect to the process structure.
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