Authors: Akhil Muralidharan; V. Sugumaran; K.P. Soman; M. Amarnath
Addresses: Vellore Institute of Technology, Chennai Campus, Vandalur, Kelambakkam Road, Chennai, 600048, India ' Vellore Institute of Technology, Chennai Campus, Vandalur, Kelambakkam Road, Chennai, 600048, India ' Amrita Vishwa Vidyapeetham, Amritanagar, Coimbatore – 641 112, Tamilnadu, India ' Pandit Dwarka Prasad Mishra Indian Institute of Information, Technology, Design and Manufacturing Jabalpur, Dumna Airport Road, P.O. Khamaria, Jabalpur – 482 005, Madhya Pradesh, India
Abstract: A faulty gear affects the functionality of the machine. Thus, it is necessary to diagnose the faults at an initial stage so as to reduce the losses incurred. Vibration signals contain dynamic information about the health condition of a rotating machine. Many researches are based on FFT and have its own drawback with non-stationary signals like the ones from gears. Hence, there is a need for development of new methodologies to infer diagnostic information from such signals. The vibrations produced by gears from good and simulated faulty conditions can be used to detect the faults in these gears. In the present study, variational mode decomposition (VMD) was used as a new signal pre-processing technique along with decision trees which have provided good classification performance. The technique decomposes the signals into various modes by identifying a compact frequency support around its central frequency, such that adding all the modes reconstructs the original signal. Descriptive statistical features were extracted from VMD processed signals. J48 decision tree algorithm was used to identify the useful features and the selected features were classified using the decision trees namely, J48, random tree and decision stump algorithm. The performance analyses of various algorithms are discussed in detail.
Keywords: gear fault diagnosis; variational mode decomposition; alternating direction multiplier; J48 decision tree; decision stump algorithm; random tree; helical gears; gearbox; vibration signals; simulation; rotating machinery.
International Journal of Decision Support Systems, 2015 Vol.1 No.4, pp.391 - 411
Received: 20 Sep 2014
Accepted: 31 May 2015
Published online: 04 Feb 2016 *