Rotating machinery combined fault diagnosis is a difficult process, primarily because of the complexity of the vibration signals and the interface of several multiple components.The study of multi-fault (two and more combinations) using different techniques by a few researchers. The vibration parameter provides sufficient information about location and severity, as well as the earliest failures. In this study vibration analysis is used to diagnose multiple faults, including unbalance, misalignment, and bent shafts.Phase and amplitude are typically used to determine the fault type.The result shows spectrum and phase detects unbalance, misalignment and bent shaft fault accurately.

Faults diagnosis; Vibration analysis; Phase analysis; Multifault