Sökning: "condition"

Visar resultat 21 - 25 av 2958 avhandlingar innehållade ordet condition.

1. 21. Condition-Based Maintenance: Selection and Improvement of a Cost-Effective Vibration-Based Maintenance Policy for Rolling element Bearings

   Författare :Basim Al-Najjar; Sherwin David; Bo Bergman; Produktionsekonomi; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; vibration and acoustic engineering; vacuum technology; hydraulics; Mechanical engineering; a cost-effective vibration-based maintenance policy.; Integrated maintenance; Condition monitoring and control; Total Time on Test-plots; Vibration monitoring; effectiveness and accuracy; Failure causes and mechanisms; Maintenance quality; Maskinteknik; hydraulik; vakuumteknik; vibrationer; akustik; Commercial and industrial economics; Industriell ekonomi; Maintenance Technology; Terotechnology;

   Sammanfattning : Modern machinery is expensive and therefore must run at high availability and effectiveness which cannot be achieved without an effective maintenance policy. Condition monitoring, (CM), techniques can be utilised to reduce or arrest the rate of deterioration of a component so increasing operating life. LÄS MER

3. 22. Condition-based Failure Rate Modelling for Individual Components in the Power System

   Författare :Jan Henning Jürgensen; Patrik Hilber; Lars Nordström; Thomas Welte; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Asset management; condition monitoring; diagnostic measures; failure rate; failure rate modeling; transformer diagnostics; Electrical Engineering; Elektro- och systemteknik;

   Sammanfattning : The electrical power grid is one of the most important infrastructures in the modernsociety. It supplies industrial and private customers with electricity and supportsother critical infrastructures such as the water supply. Thus, it is significant that the power grid is a reliable system. LÄS MER

4. 23. Condition monitoring of machine tools and machining processes using internal sensor signals

   Författare :Jari Repo; Mihai Nicolescu; Dragos Axiente; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; condition monitoring; machine tool; machining process; milling; position encoders; signal analysis; Mechanical engineering; Maskinteknik; Materials science; Manufacturing and materials engineering;

   Sammanfattning : Condition monitoring of critical machine tool components and machining processes is a key factor to increase the availability of the machine tool and achieving a more robust machining process. Failures in the machining process and machine tool components may also have negative effects on the final produced part. LÄS MER

5. 24. From Condition Monitoring to Maintenance Management in Electric Power System Generation with focus on Wind Turbines

   Författare :Peyman Mazidi; Miguel Ángel Sanz Bobi; Lina Bertling Tjernberg; Javier García González; KTH; []
   Nyckelord :Anomaly Detection; Condition Monitoring; Maintenance Management; Performance Evaluation; Data Analytics; Mathematical Modeling; Optimization; Electrical Engineering; Elektro- och systemteknik;

   Sammanfattning : With increase in the number of sensors installed on sub-assemblies of industrial components, the amount of data collected is rapidly increasing. These data hold information in the areas of operation of the system and evolution of health condition of the components. LÄS MER

7. 25. A Fault Detection Framework Using Recurrent Neural Networks for Condition Monitoring of Wind Turbines

   Författare :Yue Cui; Lina Bertling; Pramod Bangalore; Bikash C Pal; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; asset management; condition monitoring; fault detection; preventive maintenance; recurrent neural networks; two-stage threshold; wind power; kapitalförvaltning; underhållsstyrning; tillståndsövervakning; feldetektering; förebyggande underhåll; återkommande neurala nätverk; tvåstegs tröskel; vindkraft; Electrical Engineering; Elektro- och systemteknik;

   Sammanfattning : The global energy system is experiencing a transition to a sustainable system with ambitious targets for increased use of renewable energy. One key trend for this transition has been the large introduction of wind power and integration into the electricity grid. LÄS MER