The Performance Investigation of Smart Diagnosis for Bearings Using Mixed Chaotic Features with Fractional Order

Abstract

This article presents a performance investigation of a fault detection approach for bearings using different chaotic features with fractional order, where the five different chaotic features and three combinations are clearly described, and the detection achievement is organized. In the architecture of the method, a fractional order chaotic system is first applied to produce a chaotic map of the original vibration signal in the chaotic domain, where small changes in the signal with different bearing statuses might be present; then, a 3D feature map can be obtained. Second, five different features, combination methods, and corresponding extraction functions are introduced. In the third action, the correlation functions of extension theory used to construct the classical domain and joint fields are applied to further define the ranges belonging to different bearing statuses. Finally, testing data are fed into the detection system to verify the performance. The experimental results show that the proposed different chaotic features perform well in the detection of bearings with 7 and 21 mil diameters, and an average accuracy rate of 94.4% was achieved in all cases.

Assessment of Suitability for Long-Term Operation of a Bucket Elevator: A Case Study

“…Moreover, in the case of vibroacoustic diagnostics, additional diagnostically relevant information can be obtained via the time-frequency domain analysis. The most popular techniques based on such an approach include fast Fourier transform and Fourier analysis [4,9,[19][20][21][22]. Wavelet analysis is another significant transformation in this domain [9,15,16,21,[23][24][25][26].…”

“…Hence, if it is possible and economically justified, in condition monitoring, it is recommended to use different signals at the same time, e.g., vibration, electrical and acoustic signals. More detailed information about such an approach can be found in [22,29,30].…”