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Book Description
Plusieurs recherches qui s'int ressent au probl me du diagnostic des d fauts des moteurs combustion interne. Les m thodes et les techniques utilis es, sont tr s nombreuses et tr s vari es. L'analyse vibratoire est l'un des moyens, non destructives, utilis s pour le diagnostic des d fauts des moteurs combustion interne. Son objectif est de d tecter des d fauts m caniques travers des signaux acc l rom triques mesur s de la structure du moteur. Dans cette oeuvre, on tudie la possibilit de d tecter, identifier et localiser des d fauts m caniques dans un moteur diesel combustion interne, en analysant, seulement, des signaux vibratoires mesur s de la structure externe du moteur. L'oeuvre consiste aussi rechercher et appliquer des r centes m thodes permettant la s lection de l'emplacement des acc l rom tres et des indicateurs calcul s partir des signaux vibratoires. L' tude des effets de la fusion des indicateurs et d' limination des valeurs aberrantes sont aussi deux autres objectifs de cette th se. Pour classer les d fauts simul s, deux familles de m thodes de classification sont exploit es: les m thodes dites supervis es et les m thodes dites nonsupervis es.
Book Description
Plusieurs recherches qui s'int ressent au probl me du diagnostic des d fauts des moteurs combustion interne. Les m thodes et les techniques utilis es, sont tr s nombreuses et tr s vari es. L'analyse vibratoire est l'un des moyens, non destructives, utilis s pour le diagnostic des d fauts des moteurs combustion interne. Son objectif est de d tecter des d fauts m caniques travers des signaux acc l rom triques mesur s de la structure du moteur. Dans cette oeuvre, on tudie la possibilit de d tecter, identifier et localiser des d fauts m caniques dans un moteur diesel combustion interne, en analysant, seulement, des signaux vibratoires mesur s de la structure externe du moteur. L'oeuvre consiste aussi rechercher et appliquer des r centes m thodes permettant la s lection de l'emplacement des acc l rom tres et des indicateurs calcul s partir des signaux vibratoires. L' tude des effets de la fusion des indicateurs et d' limination des valeurs aberrantes sont aussi deux autres objectifs de cette th se. Pour classer les d fauts simul s, deux familles de m thodes de classification sont exploit es: les m thodes dites supervis es et les m thodes dites nonsupervis es.
Author: LYONNET Patrick Publisher: Lavoisier ISBN: 2743063858 Category : Languages : en Pages : 394
Book Description
Permettre de concevoir, développer et utiliser des systèmes de diagnostic, de surveillance et de maintenance prédictive pour systèmes complexes (avions, centrales nucléaires, transport, etc.), afin d'optimiser les performances de la sûreté de fonctionnement : tel est l'objectif de cet ouvrage. Pour cela Fiabilité, diagnostic et maintenance prédictive des systèmes s'appuie sur la modélisation des systèmes (parties commandes et opératives), l'évaluation probabiliste et déterministe du fonctionnement, et la conception de systèmes de surveillance. Cet ouvrage fait le lien entre le diagnostic, la maintenance et la fiabilité des systèmes techniques, du plus simple au plus complexe. Son approche novatrice et sa présentation en font un véritable guide théorique et pratique pour les ingénieurs qui pourront y trouver la réponse à de nombreux problèmes de diagnostic, de surveillance et de maintenance, en particulier grâce à l'analyse vibratoire. Très didactique et accompagné de plus de 100 exercices et problèmes résolus reflétant des situations concrètes, il présente les concepts de base pour concevoir et développer correctement des outils ou des systèmes de diagnostic et de maintenance conditionnelle (prédictive) indispensables aux ingénieurs ou aux élèves ingénieurs en génie industriel, génie mécanique, robotique ou sûreté de fonctionnement dans les domaines les plus variés.
Author: Abdenour Soualhi Publisher: John Wiley & Sons ISBN: 111972029X Category : Science Languages : en Pages : 246
Book Description
Methods of diagnosis and prognosis play a key role in the reliability and safety of industrial systems. Failure diagnosis requires the use of suitable sensors, which provide signals that are processed to monitor features (health indicators) for defects. These features are required to distinguish between operating states, in order to inform the operator of the severity level, or even the type, of a failure. Prognosis is defined as the estimation of a systems lifespan, including how long remains and how long has passed. It also encompasses the prediction of impending failures. This is a challenge that many researchers are currently trying to address. Electrical Systems, a book in two volumes, informs readers of the theoretical solutions to this problem, and the results obtained in several laboratories in France, Spain and further afield. To this end, many researchers from the scientific community have contributed to this book to share their research results.
Author: Abdenour Soualhi Publisher: John Wiley & Sons ISBN: 1786304651 Category : Science Languages : en Pages : 240
Book Description
Methods of diagnosis and prognosis play a key role in the reliability and safety of industrial systems. Failure diagnosis requires the use of suitable sensors, which provide signals that are processed to monitor features (health indicators) for defects. These features are required to distinguish between operating states, in order to inform the operator of the severity level, or even the type, of a failure. Prognosis is defined as the estimation of a systems lifespan, including how long remains and how long has passed. It also encompasses the prediction of impending failures. This is a challenge that many researchers are currently trying to address. Electrical Systems, a book in two volumes, informs readers of the theoretical solutions to this problem, and the results obtained in several laboratories in France, Spain and further afield. To this end, many researchers from the scientific community have contributed to this book to share their research results.
Author: North Atlantic Treaty Organization. Advisory Group for Aerospace Research and Development. Propulsion and Energetics Panel Publisher: ISBN: Category : Aircraft gas-turbines Languages : en Pages : 254
Author: Nenad Janićijević Publisher: ISBN: Category : Automobiles Languages : en Pages : 390
Book Description
P-187 discusses such aspects of the automotive industry as the growing international scope of the industry; safety and environmental considerations; company strategies for the future, and the increasing use of CAD/CAM in manufacturing.
Author: João Pedro A. Bastos Publisher: CRC Press ISBN: 9780203911174 Category : Technology & Engineering Languages : en Pages : 512
Book Description
Unlike any other source in the field, this valuable reference clearly examines key aspects of the finite element method (FEM) for electromagnetic analysis of low-frequency electrical devices. The authors examine phenomena such as nonlinearity, mechanical force, electrical circuit coupling, vibration, heat, and movement for applications in the elect
Author: Kai Goebel Publisher: Createspace Independent Publishing Platform ISBN: 9781539074830 Category : Engineering systems Languages : en Pages : 396
Book Description
Prognostics is the science of making predictions of engineering systems. It is part of a suite of techniques that determine whether a system is behaving within nominal operational performance and - if it does not - that determine what is wrong and how long it will take until the system no longer fulfills certain functional requirements. This book presents the latest developments and research findings on the topic of prognostics by the Prognostics Center of Excellence at NASA Ames Research Center. The book is intended to provide a practitioner with an understanding of the foundational concepts as well as practical tools to perform prognostics and health management on different types of engineering systems and in particular to predict remaining useful life.
Author: Peter Tavner Publisher: Institution of Engineering and Technology ISBN: 1785618652 Category : Technology & Engineering Languages : en Pages : 433
Book Description
Condition monitoring of engineering plants has increased in importance as engineering processes have become increasingly automated. However, electrical machinery usually receives attention only at infrequent intervals when the plant or the electricity generator is shut down. The economics of industry have been changing, placing ever more emphasis on the importance of reliable operation of the plants. Electronics and software in instrumentation, computers, and digital signal processors have improved our ability to analyse machinery online. Condition monitoring is now being applied to a range of systems from fault-tolerant drives of a few hundred watts to machinery of a few hundred MW in major plants.
Author: Ezzeddine Ftoutou
Author: Ezzeddine Ftoutou
Author: 
Author: LYONNET Patrick
Author: Abdenour Soualhi
Author: Abdenour Soualhi
Author: North Atlantic Treaty Organization. Advisory Group for Aerospace Research and Development. Propulsion and Energetics Panel
Author: Nenad Janićijević
Author: João Pedro A. Bastos
Author: Kai Goebel
Author: Peter Tavner