Controle ativo de vibrações em rotores flexíveis utilizando lógica fuzzy

Abstract

In this current contribution, it is performed an approaching of an active vibration controller in a flexible rotor in a computing environment. The rotor shaft is modeled by finite elements using the method Timoshenko´s beam element, which has the following features: the element has 2 nods, each of them has 4 degrees of freedom, in other words, two degrees of displacement and two degrees of rotation. It has been using electromagnetic actuators to control this structure. The great concern of this study is due to using those electromagnetic actuators that are represented by a non-linear model. Thus, conditions are proposed to analyze and design the fuzzy’s system of control that is based on Takagi-Sugeno model and the control is obtained by using the ℋ∞ (H-infinity) norm. The parallel distributed compensation, which is to obtain local controllers, assists the fuzzy controllers and through the linear combinations of these local controllers, it is possible to get the global controller. The simulation results demonstrated the effectiveness of this methodology.