Utilização da lógica fuzzy no controle de vibração por excitador eletromagnético

Abstract

The mechanical vibrations or oscillations are movements that are repeated after a certain period of time. These oscillations are used to characterize dynamic systems in terms of their properties. These characteristics are fundamental in the areas of civil and mechanical construction, being widely used to test the strength of structures, in preventing to the appearance of fatigues, when applied in a specific vibration. In this work, vibration and diffuse control tests were performed in an advanced system composed of an electromagnetic oscillator and an acceleration transducer. The parameters used for system control were: scanning the control signal for frequencies from 100 to 1 kHz; control using loads of 100 to 500 grams; implementation of 49 fuzzy rules distributed between error analysis and error variation; analysis of the average percentage error and control of the peak voltage at 1 volt of amplitude equivalent to the acceleration of 61.730 m/s² without load. This paper presents the control of the system with average errors varying from 0,35% to 1.51%. In which loads between zero and 500 grams were added. The conclusion of this study consisted in the correction of the vibration amplitude, by the Fuzzy control technique through of LabVIEWTM programming for a given frequency, in that enabled the most accurate analysis of structures and impacts and mechanical vibrations.