Controle ativo de vibrações do tipo Self-Sensing utilizando atuadores eletromagnéticos

Abstract

The present work aims to apply the active vibration control approach using electromagnetic actuators by using the self-sensing methodology. This methodology uses the voltage and current present in the electromagnetic coils as a control action, thus not requiring physical position sensors. In this context, the mentioned control approach was applied in a beam clamped at its ends and two electromagnetic actuators in a differential assembly. In the numerical model, this system has been simplified to one degree of freedom (mass-spring-damper). Thus, a self-sensing proportional-integral-derivative (PID) control was analyzed for different frequencies of external excitation. The obtained results demonstrated the efficiency of the conveyed approach in reducing the vibration amplitudes of the considered model. Regarding the experimental tests, a shaker was used to apply the external excitation in the considered beam, which generated sine waves at different frequencies established within a range of interest. The purpose of these tests was to verify the behavior of the self-sensing actuator/controller set and to validate this control methodology under different conditions. Besides, in these tests, a conventional proportional-derivative (PD) controller was applied using the response of an accelerometer as output. Thus, comparisons were made between the results obtained by these two types of control approaches. Satisfactory results were obtained in the experimental tests. The obtained results, both numerical and experimental, demonstrate the success of the self-sensing methodology conveyed.