Controle ativo de vibrações em estruturas flexíveis

Abstract

In this work, a study of the active vibration control of flexible rotors computing environment is carried out. The rotor shaft is modeled in finite elements using the Timoshenko beam element, and it has the following features: the element has two nodes, each node has four degrees of freedom, i.e. two degrees and two degrees displacement for rotation. For controlling, the flexible structure is used electromagnetic actuators. The great difficulty found in this contribution is due to the use of these electromagnetic actuators that are represented by a non-linear model. For this difficulty, conditions are proposed for analysis and design of fuzzy control system based on Takagi-Sugeno models and the control is obtained using the linear quadratic regulator. The fuzzy controller uses the parallel distributed compensation is to secure local controllers, and through linear combination of these controllers are obtained by a global controller. The results of the simulations demonstrate the effectiveness of the methodology.