The application of rough set theory in the real-time fault diagnosis for rotating mechanical devices
Cuiling Li · Manufacturing Automation · 2006
In this paper, the decision model in rough set theory is introduced as the rule generating tool for the typical faults for rotating mechanical devices, according to the real-time fault diagnosis for this kind of devices. To solve the non- stability of the fault signals, the Wavelet Packet Analysis (WPA) is employed as an effective direct abstracting tool for the frequency segments features of the field signal. And on this basis, the two theoretical tools-rough set and wavelet packet analysis-are integrated into a new fault analysis model especially fitting the on-line fault analysis and diagnosis for modern mechanical devices. Finally, a factual case is studied to prove the whole fault analysis and diagnosis process.