Abstract

Abstract The present research studied fault diagnosis of composite sheets using vibration signal processing and artificial intelligence (AI)-based methods. To this end, vibration signals were collected from sound and faulty composite plates. Using different time-frequency signal analysis and processing methods, a number of features were extracted from these signals and the most effective features containing further information on these composite plates were provided as input to different classification systems. The output of these classification systems reveals the faults in composite plates. The different types of classification systems used in this research were the support vector machine (SVM), adaptive neuro-fuzzy inference system (ANFIS), k-nearest neighbor (k-NN), artificial neural networks (ANNs), Extended Classifier System (XCS) algorithm, and the proposed improved XCS algorithm. The research results were reflective of the superiority of ANFIS in terms of precision, while this method had the highest process duration with an equal number of iterations. The precision of the proposed improved XCS method was lower than that of ANFIS, but the duration of the process was shorter than the ANFIS method with an equal number of iterations.

Highlights

  • Demand for materials with high strength and stiffness and low weight has increased in various industries since aboutNumerous studies have been carried out on fault diagnosis in composite plates using experimental analyses

  • The different types of classification systems used in this research were the support vector machine (SVM), adaptive neuro-fuzzy inference system (ANFIS), k-nearest neighbor (k-NN), artificial neural networks (ANNs), Extended Classifier System (XCS) algorithm, and the proposed improved XCS algorithm

  • Fault detection of composite sheets using vibratory signal processing and methods based on the artificial intelligence (AI) has been performed in such a way that vibratory signals have been taken from healthy and faulty composite sheets

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Summary

Introduction

Demand for materials with high strength and stiffness and low weight has increased in various industries since aboutNumerous studies have been carried out on fault diagnosis in composite plates using experimental analyses. Song et al [8] introduced a complete methodology based on the Laplace transform for the analysis of free bending vibrations in laminated composite cantilevers with surface cracks. They used Hamilton’s principle of variation and Timoshenko’s beam theory to develop the damage identification technique. Just-Agosto et al [9] used the neural network model in combination with the effects of thermal and vibratory damage identification to develop the damage identification method. They used the enhanced technique to sandwich composites for crack detection. Perera et al [10] applied the genetic algorithm (GA) to the multi-

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