A fundamental procedure to guarantee the energy quality in electric systems is the tension regulation. However, it is not a trivial activity due to the great number of state variations that an electric system is ...

Until a few decades, control systems for induction engines (totally more robust than the other kind of engines) were more costly when compared with the control of motors of continuous current. With the advent of theory ...

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The use of automatic control systems is found to be fully spread out through our daily use in all the developed societies. Such systems work as catalyzing elements to promote the progress and development. The example ...

The magnetic levitation, also known as magnetic suspension and abreviated by Maglev, is a result of the magnetic attraction, repulsion and forces equilibrium physical principles apllied to a determined object in the ...

In the last few years, the growth of the academic production about non-linear dynamic systems was noticed. Although the researches evolved, there are still topics that deserve a close analysis. One of them includes the ...

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