نتایج جستجو برای: condition monitoring techniques

تعداد نتایج: 1192059  

2004
Peter Carden Paul Fanning E. Peter Carden

Vibration based condition monitoring refers to the use of in situ non-destructive sensing and analysis of system characteristics – in the time, frequency or modal domains – for the purpose of detecting changes, which may indicate damage or degradation. In the field of civil engineering, monitoring systems have the potential to facilitate the more economical management and maintenance of modern ...

2013
Enrico Zio Piero Baraldi Christopher J. Wallace Jason J.A. Costello Graeme M. West Stephen D.J. McArthur Mike Coghlan

The use of Condition Monitoring (CM) in the power industry is well established, with traditional manual analysis increasingly giving way to intelligent, automated analysis. Further, there is a growing interest in the extension of such CM systems to derive prognostic information for asset management. It is common however for CM applications to be retrofitted to existing equipment, to monitor a p...

2006
Niels Henrik Pontoppidan

This paper analyses acoustic emission energy signals acquired under mixed load conditions with one induced fault. With Mean field independent components analysis is applied to an observation matrix build from successive acoustic emission energy revolution signals. The paper presents novel results that provide remarkable automatic grouping of the observed signals equivalent to the grouping obtai...

Journal: :Rel. Eng. & Sys. Safety 2002
Tony Rosqvist

Automated condition monitoring of active components of a system can improve the cost-ef®ciency of preventive and corrective maintenance and the availability of the production system. The validity, reliability and correct interpretation of the signals obtained from the condition monitoring instrumentation is important for the realisation of the potential bene®ts. The utilisation of experts in th...

2016
Juggrapong Treetrong Jyoti K. Sinha Fengshu Gu Andrew Ball

This paper presents parameter identification technique to quantify the faults in motor condition monitoring. Genetic Algorithm (GA) has been used as a key technique to estimate the motor parameters. The zero-sequence voltage equation for the stator has been used as a model to estimate motor stator parameters – the stator resistance and the stator leakage inductance. The comparison of the parame...

2003
Nii O. Attoh-Okine Stephen Mensah

Although the universal definition of MEMS product possesses a number of distinctive features, they are miniature systems involving one or more micro-mechanical components or structure. Infrastructure assessment has recently addressed an important field for MEMS application. For example, satisfactory laboratory experiment in the area of concrete monitoring has been developed. Although the experi...

2005
Steven B. Leeb Timothy J. McCoy

The Navy’s Integrated Condition Assessment System (ICAS) is continuously evolving to meet the needs of today’s fleet as well as the requirements of future ship designs. This paper describes a technology known as the non-intrusive load monitor that could support the evolution of ICAS and other condition-based maintenance (CBM) systems. The non-intrusive load monitor (NILM) [8, 9, 10] can be used...

2012
Rami H. Fouad Murad S. Samhouri

Machine condition monitoring and fault diagnosis fields are charged with developing new technologies to detect and diagnose the machinery problems. In fact, several methods of fault diagnostics have been developed and applied effectively to identify the machine faults at an early stage using different quantities (Measures or Readings) such as current, voltage, speed, temperature, and vibrations...

Journal: :Structural control & health monitoring 2022

An inverse input–output method is proposed for long-term condition monitoring of civil infrastructures through the prediction error air temperature recorded at site a structure. It known that structural natural frequencies are affected by temperature. Hence, considers as input and output to train machine learning algorithm (MLA). To this end, after signal preprocessing using variational mode de...

پایان نامه :دانشگاه تربیت معلم - سبزوار - دانشکده ادبیات و زبانهای خارجی 1390

this study investigated the effects of planning on second-language written production with regard to task type. the participants were 75 iranian learners of english as a foreign language attending a private foreign language institution. they were asked to complete two different types of writing tasks (expository writing task and argumentative writing task) in different planned conditions (indiv...

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