This dissertation deals with error frequences of bearing because the bearing is part of every rotary machine. Certain type of bearing and caused defect is being compared with error frequences which are acquired by experiment. Various kinds of measurement which are more or less applicable in use are being described. Further the dissertation deals with other possible ways of detection error frequences for particular defects of bearing.

The thesis deals with possibilities of application of VAG-COM PROFI diagnostic kit in forensic engineering. After defining a theoretical basis, according to possibilities of evaluation of technical condition of a vehicle, the thesis is focused on applying diagnostic methods using above mentioned diagnostic kit. With respect to opportunities of identification of driving parameters, possibility of acceleration measurement and estimation of engine power are introduced. Describing of methodology and making the final statement are contained in the thesis as a part of every single measurement.

The thesis is focused on multiparametric diagnostic of generators at the Dukovany nuclear power plant. One generator was chosen for the thesis and it was examined especially from the practical point of view. The thesis describes current state of the issue with focus on noise diagnostics, vibrodiagnostics and electrodiagnostics. The emphasis is on the system approach of the solution. In the practical part an experiment is designed, described and evaluated. Attention is paid to the conclusions of the performed vibrodiagnostics and noise diagnostics. Data sets are evaluated separately and the relationship between the two diagnostic methods is analyzed. Furthermore, the data set from electrodiagnostics is evaluated and dependencies of electrical diagnostic quantities on other quantities are described. Trends in electrical diagnostic quantities are also monitored. Conclusions and recommendations are formulated at the end of the thesis. It is stated that using multiparametric diagnostics to assess the status of generators in power plants is still in its beginning and that the conclusions of the submitted thesis will contribute to the developmnet in this area.

<p>Doktorska disertacija obuhvata vi&scaron;egodi&scaron;nja istraživanja koja se odnose na razvoj u tehnolo&scaron;kom unapređenju održavanja jednodelnih točkova železničkih vučenih vozila, uz primenu savremenih metoda i postupka dijagnostikovanja u cilju postizanja zadovoljavajućeg nivoa pouzdanosti pri eksploataciji.<br />Sveobuhvatnim istraživanjem pokazano je da uvođenjem ovog novog tehničko-tehnolo&scaron;kog postupka održavanja venca monoblok točka kvaliteta ER7, čini veliki značaj u tehnolo&scaron;kom unapređenju održavanja vitalnog dela &scaron;inskih vozila-točka, u sopstvenim radioničkim kapacitetima na&scaron;ih železničkih uprava. Istraživanjem je, takođe, potvrđeno da implementacija ovog, sasvim novog tehničko-tehnolo&scaron;kog postupka održavanja venca monoblok točka, je primenljiv i izvodljiv tehničko-tehnički postupak, u postojećim radioničkim kapacitetima koje se bave problematikom održavanja železničkih vozila bez znatnih investicionih ulaganja.<br />Istraživanja su se odvijala po fazama. Prvo su detaljno implementirana teoretska istraživačka dostignuća, zasnovana na izučavanju i primjeni savremenih tehnika i tehnologija na održavanju vitalnih elementa železničkih tehničkih sistema. Implementacija ovog teorijskog istraživanja, realno je produkovalo u zdrav i sveobuhvatan naučno-istraživački temelj, koji je omogućio opravdan pristup eksperimentalnom, a potom i eksploatcaionom istraživanju. Takvim sveobuhvatnim naučno-istraživačkim procesom, rezultiralo je u zadovoljavajuća naučno-istraživačka saznanja, koja će, sigurni smo, stvoriti zdravu podlogu za naučno razmatranje, a potom, i pristup, ka praktičnoj primeni od strane železničkih uprava na&scaron;ih zemalja.<br />Ceo proces istraživanja predmeta disertacije, baziran je na najnovijim dostignućima naučnog saznanja iz oblasti ma&scaron;instva koje izučavaju: tehnologiju obrade metala, tehnologiju proizvodnje čelika, mehanike metala, otpornosti materijala, potom metalurgije zavarivanja, fizike, hemije itd.<br />Eksperimentalna i eksploataciona istraživanja, pratile su savremene dijagnostičke metode i postupci, meritorne za dono&scaron;enje naučnih odluka i dokaza o nivou kvaliteta i pouzdanosti. Pokazano je da pored metoda mehnike loma metala i standardnih metalru&scaron;kih metoda ispitivanja, uvođenjem savremenih ultrazvučnih dijagnostičkih tehnika i tehnologija, u proces dijagnostikovanja vitalniog dela žlezničkih vozila, to jest monoblok točka, uveliko obezbeđuju visok stepen pouzdanosti, dajući značajan doprinos ovom istrživačkom radu, za potvrdu izvodljivosti tehničko-tehnolo&scaron;kog procesa.<br />Tehničko-tehnolo&scaron;kog procesa obnavljanja venaca monoblok točka kvaliteta ER7, navarivanjem, a izloženi mehničkim procesom tro&scaron;enja i kombinovanim statičkim i dinamičkim opterećenjima, pri eksploatciji, ne može se zamisliti bez primene pouzdanih tehnika dijagnostikovanja. Na taj način, kroz vi&scaron;e tehničkih faza obimnih istraživanja, potvrđena je i dokazana neophodnost primene dijagnostičkih metoda bez razaranja zasnovanih na polju ultrazvučne defektoskopije, kako bi se potvrdio i uvećao uticaj na pouzdanost tehničkog sistema-železničko vozilo.</p> / <p>Doctoral dissertation includes several years of research concerning the development of technological<br />6<br />improvement in the maintenance of oneparted railway wheels towed vehicle, with modern methods of diagnosis and procedure in order to achieve satisfactory levels of reliability in operation. Comprehensive research has shown that the introduction of this new technological process of maintaining of the wreath of monoblock wheels, quality ER7, makes a great technological importance in improving the maintenance of vital rail vehicle-point in our own workshop facilities of railway direction. The study also confirmed that, the implementation of this, an entirely new technological maintenance procedures wreath monoblock wheel, is applicable and feasible technical and technical process for the existing workshop facilities to deal with the problem of maintenance of railway vehicles without significant investment. Surveys were conducted in stages. First in detail are implemented the theoretical research achievements, based on the study and application of modern techniques and technologies, made to maintain the vital elements of railway technical systems. Implementation of this theoretical study is produced by the realistic sound and comprehensive scientific foundation, which allowed reasonable access to experimental, and also exploitation research. This comprehensive scientific research process, resulted a satisfactory scientific research findings, which for sure will create a sound basis for scientific discussion and also access to practical use by the railway companies of our country. The whole process of dissertation research subjects is based on the latest achievements of scientific knowledge in mechanical engineering studies such as: the technology of metal processing, steel production technology, metal mechanics, strength of materials, welding metallurgy, physics, chemistry, etc.. Experimental research and exploitation, were accompanied by modern diagnostic methods and procedures, merit-making for the adoption of scientific decisions and evidence at the level of quality and reliability. It is shown that besides the methods of fracture of metals and mechanics metallurgy standard test methods, the introduction of modern ultrasonic diagnostic techniques and technologies in the process of diagnosing vital railway vehicle, as a monoblock points, largely provides a high degree of reliability by providing a significant contribution to this research for confirming technological feasibility of the process. Technological process of wreath restoring of monoblock wheels, quality ER7, which are subjected to the mechanical process of wear and combinated static and dynamic loads, in the process od exploitation, it can not be imagined without the use of reliable diagnostic techniques. Thus, through the more technical phases of extensive research, has been confirmed and proved the necessity of applying nondestructive diagnostic method based on the field of ultrasound defectoscopy, with the purpose of confirmation and increasing of impact on the reliability of technical systems and rail car.&nbsp;</p>

This master thesis concerns modern method of TPM used in the production companies for maintenance of machinery. In the theoretical part, general maintenance is first described, as well as the TPM method. There is also described the technical diagnostics, which was emphasized in the practical part in terms of the use of vibrodiagnostics in predictive maintenance. In the practical part there is presented the proposal for introduction of the TPM method at the SMC Industrial Automation s.r.o. in Vyškov.

This thesis deals with vibration diagnostics and on-line monitoring systems of several producers. Furthermore, this thesis contains a description and evaluation of measuring the vibrations of the machine tool spindle when machining test samples with different cutting conditions and evaluating the surface quality of test samples.

This master thesis deals with the technical diagnostics, focusing mainly on vibration diagnostics. This problematice is described in the first part of this work on a theoretical level. The next part describes the paper machine, diagnostic system and the measuring points are classified into databases. The practical part of this work consists of a proposal for the methodology of vibration diagnostics for a paper machine, the procedure for measuring and evaluating the measured values. Part of the work is also a practical example of the measurement of the central cylinder, on which the procedure is tested, and the compilation of new limit values.

This thesis is focused on technical systems and evaluating their safety. It tries to make a complex view of links between safety, demands for quality and technical diagnostics. It tries to apply all the information about mentioned features to concrete branch of machines ¨C highŠ\voltage electrical rotary machines. Practical part of this thesis consists of statistical analysis of measured parameters by two hydroelectric generators. Main task of this thesis is to transpose theoretical knowledge of safety and technical systems to the branch of highŠ\voltage electrical rotary machines. This thesis also tries to find appropriate and more efficient evaluation method for analyzing the parameters of mentioned machines. Another benefit of this thesis should be bringing few new ideas about evaluating safety and technical status of highŠ\voltage electrical rotary machines. Keywords: technical system, safety, highŠ\voltage electrical machines, technical diagnostics

<p>Osnovni cilj ove disertacije je da se razvije Integrisani model odrţavanja zasnovan na vibracijama sloţenih rotacionih tehniĉkih sistema, odnosno da se uspostavi sprovoĊenje dijagnostiĉkih provera stanja sklopova rotacionih ma&scaron;ina (kontrola vibracija). Zatim da se defini&scaron;u optimalne periodiĉnosti vibracija kao i identifikacija ocena i rangiranja rizika sa stanovi&scaron;ta prekida rada ma&scaron;ina. Na taj naĉin potvrdiće se glavna hipoteza koja glasi: &bdquo;Razvijanjem integrisanog modela odrţavanja zasnovanog na uspostavljanju zakonitosti promene mehaniĉkih vibracija moći će da se preventivno predvide pojave neispravnosti i prognozira stanje rotacionih ma&scaron;ina.</p> / <p>The basic goal of this dissertation is the development of an Integrated Maintenance Model based on vibrations of complex rotational technical systems, in other words, the establishment of implementation of diagnostic checks of rotating machinery compositions condition (control of vibrations). Afterwards, the definition of optimal periodicity of vibrations, as well as identification of estimations and ranking of risks from the stand point of disruption of work of operational processes. This is the way to confirm the main hypothesis which reads: &ldquo;Development of an Integrated Maintenance Model based on the establishment of legality of change of mechanical vibrations will enable preventive predicting of malfunction occurrence, as well as prognosis of rotating machinery health.</p>

This master thesis deals with position of the maintenance in the company structure and with modern management approaches. One of the highest levels of maintenance is the proactive maintenance, which is using the technical diagnostics to find out the causes of failures. The most inportant in case of machines are vibrodiagnostics and thermodiagnostics, which are going to be applied on the motors in company Bosch Diesel s.r.o.