Eventos Anais de eventos
COBEM 2021
26th International Congress of Mechanical Engineering
INCREASING ROBUSTNESS TO THE ISHM APPROACH FOR FAULT DETECTION IN A COMPOSITE HOLLOW SHAFT
Submission Author:
Fernanda Beatriz Aires de Freitas , RN , Brazil
Co-Authors:
Fernanda Beatriz Aires de Freitas, Karina Mayumi Tsuruta, Aldemir Ap Cavalini Jr, Valder Steffen Jr
Presenter: Fernanda Beatriz Aires de Freitas
doi://10.26678/ABCM.COBEM2021.COB2021-1882
Abstract
Composite materials has been applied to manufacture rotating shafts for the automotive, marine, and aerospace industries. This kind of material can reduce structural weight, wear, acoustic noise, and vibration amplitude. Additionally, it can increases the performance of the system when replacing the components made with traditional materials. However, the composite material suffers different damage modes hard to be detected. Thus, many methods were proposed in the last years for damage detection purposes in composite materials, such as the so-called electromechanical impedance approach (ISHM method). In this context, the objective of this work was to improve the robustness of the ISHM technique for damage detection in a composite hollow shaft considering large temperature variations (0°C to 50°C). To minimize the effects of temperature variation in the impedance signatures, a hybrid optimization strategy (Differential evolution and Nelder-Mead methods) was used. However, this technique reveals to be not efficient to minimize the influence of temperature over the entire frequency range investigated. Therefore, a new compensation methodology using compromise programming was proposed looking for optimal frequency regions in the measured impedance signatures. The obtained results demonstrated the effectiveness of the proposed temperature compensation approach for increasing the robust of the ISHM technique.
Keywords
ISHM, rotating machines, composite shaft, Temperature compensation, Optimization
