Controle robusto de vibrações em uma viga de material compósito

Abstract

Engineering research into the development of new techniques for active vibration control has seen a significant increase in recent years. The present work proposes the active vibration control in a beam of composite material, using electromagnetic actuators, in order to obtain a reduction in the response of the displacement of the system. The control theory used was the robust control, specifically the linear quadratic regulator solved by linear matrix inequalities, that proposes the possibility of optimizing physical quantities by means the adoption of a performance index. The electromagnetic actuator was then linearized using a methodology similar to that used in magnetic bearings. The advantage of this type of actuator is that applies control force without mechanical contact. From numerical simulations, the system displacement response was obtained in the time domain, in which the vibration of the system was attenuated and also the results of the frequency response function showed that the two fisrt vibration modes were attenuated, thus demonstrating the efficiency of the proposed technique in the active control of vibrations in a beam of composite material. Seeking a good relation between the control force and vibration attenuation, the work also proposes to study the optimization of parameters applied in this active control, by means of the heuristic optimization methods, in order to find an optimal configuration of the control system.