An overview of PST for vibration based fault diagnostics in rotating machinery

Abstract

In general, diagnostics can be defined as the procedure of mapping the information obtained in the measurement space to the presence and magnitude of faults in the fault space. These measurements, and especially their nonlinear features, have the potential to be exploited to detect changes in dynamics due to the faults. We have been developing some interesting techniques for fault diagnostics with gratifying results. These techniques are fundamentally based on extracting appropriate features of nonlinear dynamical behavior of dynamic systems. In particular, this paper provides an overview of a technique we have developed called Phase Space Topology (PST), which has so far displayed remarkable effectiveness in unearthing faults in machinery. Applications to bearing, gear and crack diagnostics are briefly discussed.

A Review of Phase Space Topology Methods for Vibration-Based Fault Diagnostics in Nonlinear Systems

“…In [13][14][15]31], the PST method was introduced. In this work, we performed bearing diagnostics on different rotational speeds domains and obtained very good results (overall accuracy of 96.7% ).…”

Condition Monitoring of Horizontal Sieving Screens—A Case Study of Inertial Vibrator Bearing Failure in Calcium Carbonate Production Plant

“…In particular, PSP is useful for analysis of the bifurcations in nonlinear systems when they are susceptible to minor changes in parameters associated with fault development [ 69 , 70 ]. The application of the PSP technique needs the development of qualitative measures of trajectories topology [ 71 ]. In this paper, PSP is used to assess the faults in the bearings of vibrators.…”