Data Mining - Concepts and Techniques.

A review on machinery diagnostics and prognostics implementing condition-based maintenance

A review on empirical mode decomposition in fault diagnosis of rotating machinery

Prognostics and health management design for rotary machinery systems—Reviews, methodology and applications

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Introduction To Robust Estimation And Hypothesis Testing

With the ultimate goal of rotating machinery diagnosis using Instantaneous Angular Speed (IAS) and Time of Arrival (TOA) signals, this paper provides the theoretical background of non-stationary processes existing in the aero-engines and their monitoring using atypical encoders (e.g. fans, compressors and turbine blades cooperating with the induction sensors, AC and DC generators). The model of TOA signal including aperiodic, periodic and stochastics components has been described. The classical and expert approach to monitoring of operational and structural health parameters (CM, NDT, SHM) of aircraft and its power transmission system has been also described. Finally, the experience of the Tip Timing method used in the Armed Forces of the Republic of Poland is presented. The possibility of structural health monitoring and active controlling of the material fatigue by the aero-engine user through interference in the fuel system adjustment quality has been confirmed. Phase portraits have been used to analyze TOA components in transient state of the engine. Diagnostic criteria and expert algorithms have been verified during active and passive experiments.

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Advances in Condition Monitoring of Machinery in Non-stationary Operations

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Condition Monitoring of Machinery in Non-Stationary Operations

Condition monitoring of open cast mining machinery

The paper gives general procedures for development characteristics frequencies in a simple and elaborate gearbox systems. The gearboxes systems may consists of compound and complex gearboxes. The gearbox classification for compound and complex gearboxes is presented. The complex systems consists of planetary gearboxes. Three different planetary gearboxes are considered. These three types of planetary gearboxes are used in driving systems for mining machinery like bucket wheel excavators, shearers. The introduction to frequency characteristic development is presented. The characteristic frequencies are: sequence of recurrent excitations for short recurrent frequencies, meshing frequencies, shaft frequencies, local fault frequencies.

Vibration spectra characteristic frequencies for condition monitoring of mining machinery compound and complex gearboxes

To maintain mechatronic systems, operational current diagnostic information on gearing condition is needed. Diagnostic information on gearbox condition can be gained from vibration signals. To extract suitable information from the signal we need to know the relation between factors influencing the diagnostic signal and the gearbox condition. There are several factors that have influence on diagnostic signals and these may be divided into four groups: design (DF), production technology (PTF) operational (OF) and change of condition (CCF). To gain information from the vibration signal, many experiments have to be carried out. Because many factors influence the vibration signal, the experiments on real objects are very expensive. To reduce the cost, mathematical modelling and computer simulation may be used. Papers devoted to mathematical modelling and computer simulation are concentrated on one-stage gearboxes. In this research work, a system that consists of a driving motor, coupling, double-stage gearbox ...

Walter Bartelmus

Papers

Advances in Condition Monitoring of Machinery in Non-stationary Operations

Condition Monitoring of Machinery in Non-Stationary Operations

Condition monitoring of open cast mining machinery

Vibration spectra characteristic frequencies for condition monitoring of mining machinery compound and complex gearboxes

Diagnostic information on gearbox condition for mechatronic systems