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Microprocessor based diesel engine health monitoring system / A. Kouloughli 

Public ISBD Titre : Microprocessor based diesel engine health monitoring system Type de document : texte imprimé Auteurs : A. Kouloughli, Auteur ; A. R. Daniels, Directeur de thèse Editeur : Bath [Royaume-Uni] : University of Bath Année de publication : 1983 Importance : 96 f. Présentation : ill. Format : 27 cm. Note générale : Mémoire de Master : Electrotechnique : Angleterre, University of Bath : 1983 Annexe f. 97 - 207 . Bibliogr. [3] f Langues : Anglais (eng) Mots-clés : Microprocessor  based  system Diesel  engine Torsional  vibration  analysis Simulation  test-rig Pulsating  shaft  speed Hooke's  joint  assembly Cyclic  disturbances Data  acquisition  system Magnetic  sensors Minicomputer  system Index. décimale : Ms00183 Résumé : The purpose of this project was to design and construct a microprocessor based system for diesel engine health monitoring. The torsional vibration analysis approach was examined as a means of assessing continuously the state of the engine. A simulation test-rig was designed and built in the university laboratory in order to investigate the idea. This system was constructed using a three phase electrical motor that could be operated with a pulsating shaft speed and a Hooke's joint assembly in order to introduce cyclic disturbances in the motor shaft speed, thereby allowing an initial study to be performed. A data acquisition system was developed which consisted of using magnetic sensors and associated hardware to measure engine shaft speed variations. The inverse function method discussed in chapter 2 was implemented for speed measurement. Speed data was collected by a microprocessor based system then transferred to the PDP11/34 minicomputer system. The PDP11/34 minicomputer system was used for data storage and display. It also aided the software development for data analysis. The communication between the two computer systems was achieved using an RS-232 serial data transmission link. The software developed consisted of two main sections. The first section organised data and check it from wild points. The second section developed two analytical techniques, one based on the correlation method and the pther based on the frequency spectrum and applied these techniques to data sets obtained experimentally. Results from the laboratory test rig showed that the magnetic transducer was capable of producing sufficiently accurate information to detect small changes in the engine shaft speed. Two series of tests were performed on a V16 Paxman large diesel engine. Each test consisted of forcing a 20% over-fuel into one of the engine cylinders and recording the outputs from the transducers. The first series of tests used only one sensor and three sensors were used in the second series of tests. Results from analysis of diesel engine data sets showed some promise but suggested that a continuous monitor program should be developed to detect the disturbance rather than a single shot analysis examined in this thesis. Microprocessor based diesel engine health monitoring system [texte imprimé] / A. Kouloughli, Auteur ; A. R. Daniels, Directeur de thèse . - Bath (Royaume-Uni) : University of Bath, 1983 . - 96 f. : ill. ; 27 cm. Mémoire de Master : Electrotechnique : Angleterre, University of Bath : 1983 Annexe f. 97 - 207 . Bibliogr. [3] f Langues : Anglais (eng) Mots-clés : Microprocessor  based  system Diesel  engine Torsional  vibration  analysis Simulation  test-rig Pulsating  shaft  speed Hooke's  joint  assembly Cyclic  disturbances Data  acquisition  system Magnetic  sensors Minicomputer  system Index. décimale : Ms00183 Résumé : The purpose of this project was to design and construct a microprocessor based system for diesel engine health monitoring. The torsional vibration analysis approach was examined as a means of assessing continuously the state of the engine. A simulation test-rig was designed and built in the university laboratory in order to investigate the idea. This system was constructed using a three phase electrical motor that could be operated with a pulsating shaft speed and a Hooke's joint assembly in order to introduce cyclic disturbances in the motor shaft speed, thereby allowing an initial study to be performed. A data acquisition system was developed which consisted of using magnetic sensors and associated hardware to measure engine shaft speed variations. The inverse function method discussed in chapter 2 was implemented for speed measurement. Speed data was collected by a microprocessor based system then transferred to the PDP11/34 minicomputer system. The PDP11/34 minicomputer system was used for data storage and display. It also aided the software development for data analysis. The communication between the two computer systems was achieved using an RS-232 serial data transmission link. The software developed consisted of two main sections. The first section organised data and check it from wild points. The second section developed two analytical techniques, one based on the correlation method and the pther based on the frequency spectrum and applied these techniques to data sets obtained experimentally. Results from the laboratory test rig showed that the magnetic transducer was capable of producing sufficiently accurate information to detect small changes in the engine shaft speed. Two series of tests were performed on a V16 Paxman large diesel engine. Each test consisted of forcing a 20% over-fuel into one of the engine cylinders and recording the outputs from the transducers. The first series of tests used only one sensor and three sensors were used in the second series of tests. Results from analysis of diesel engine data sets showed some promise but suggested that a continuous monitor program should be developed to detect the disturbance rather than a single shot analysis examined in this thesis.

Exemplaires

Code-barres	Cote	Support	Localisation	Section	Disponibilité	Spécialité	Etat_Exemplaire
Ms00183	Ms00183	Papier	Bibliothèque centrale	Mémoire de Master	Disponible

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