Model based fault diagnosis of a rotor–bearing system for misalignment and unbalance under steady-state condition

Experimental investigations on vibration response of misaligned rotors

Fault detection in rotor bearing systems using time frequency techniques

Vibration response of misaligned rotors

A method and computer-based apparatus for monitoring the degradation of, predicting the remaining service life of, and/or planning maintenance for, an operating system are disclosed. Diagnostic information on degradation of the operating system is obtained through measurement of one or more performance characteristics by one or more sensors onboard and/or proximate the operating system. Though not required, it is preferred that the sensor data are validated to improve the accuracy and reliability of the service life predictions. The condition or degree of degradation of the operating system is presented to a user by way of one or more calculated, numeric degradation figures of merit that are trended against one or more independent variables using one or more mathematical techniques. Furthermore, more than one trendline and uncertainty interval may be generated for a given degradation figure of merit/independent variable data set. The trendline(s) and uncertainty interval(s) are subsequently compared to one or more degradation figure of merit thresholds to predict the remaining service life of the operating system. The present invention enables multiple mathematical approaches in determining which trendline(s) to use to provide the best estimate of the remaining service life.

Method and apparatus to predict the remaining service life of an operating system

The importance of proper shaft alignment the history of machinery alignment foundations, baseplates, machine casings, and piping strain flexible and rigid couplings defining misalignment - alignment and coupling tolerances preliminary alignment checks shaft alignment techniques and measuring tools aligning V-belt drives positioning machinery aligning multiple element drive trains and right angle drives alignment considerations for specific types of machinery finding misalignment on operating rotating machinery.

Shaft Alignment Handbook

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Shaft Alignment Handbook