Search for dissertations about: "reliability modeling"

Showing result 1 - 5 of 101 swedish dissertations containing the words reliability modeling.

  1. 1. Configuration Design of a High Performance and Responsive Manufacturing System Modeling and Evaluation

    University dissertation from Stockholm : KTH

    Author : Daniel Tesfamariam Semere; KTH.; [2005]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Configuration; Modeling; Evaluation; TECHNOLOGY Industrial engineering and economy Manufacturing engineering and work sciences Manufacturing engineering; TEKNIKVETENSKAP Industriell teknik och ekonomi Produktion och arbetsvetenskap Produktionsteknik;

    Abstract : Configuring and reconfiguring a manufacturing system is presented as an issue with increasing importance due to higher frequency of system configuration or major reconfigurations to accommodate new set of requirements and/or the need to configure the system to make it usable across generations of products or product families.This research has focused in the modeling, evaluation and selection decisions which involves multiple, incommensurate and conflicting objectives. READ MORE

  2. 2. Washing Machine Design Optimization Based on Dynamics Modeling

    University dissertation from Stockholm : KTH

    Author : Thomas Nygårds; [2011]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Experiments; Multiobjective Optimization; Modeling; Vibration dynamics; Washing machine; Suspensions; Semi-active control.; Automatic balancing;

    Abstract : The spinning process in a washing machine is a source of undesired vibrations and noise and may cause discomfort both to the user as well as for the machine itself due to vibrations which have impact on system lifetime, reliability of operation and capacity.The aim of this thesis is to develop mathematical and computational models of a washing machine of modern type and use these models for dynamics analysis and in optimization routines to make improvements of the machine mechanical design. READ MORE

  3. 3. Track circuits’ robustness Modeling, measurement and simulation

    University dissertation from Stockholm : KTH

    Author : Emilio Rodriguez; Luleå tekniska universitet.; [2014]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Track circuit; Relay; False positive signals; Signalling in railway; Modelling; Simulation; Testing; Robustness; Interoperability; Reliability; Railway Infrastructure; Technology - Electrical engineering; electronics and photonics; Information technology - Telecommunication; Information technology - Computer engineering; Technology - Engineering physics; Information technology - Systems engineering; Teknikvetenskap - Elektroteknik; elektronik och fotonik; Informationsteknik - Telekommunikation; Informationsteknik - Datorteknik; Teknikvetenskap - Teknisk fysik; Informationsteknik - Systemteknik; Drift och underhållsteknik; Operation and Maintenance;

    Abstract : In countries with rough weather conditions, frequent delays cause railway companies to waste time and money. Many of these delays are related to the train detection systems, as the old DC track circuits are still used in some countries, including Sweden, our case study. READ MORE

  4. 4. On aircraft fuel systems conceptual design and modeling

    University dissertation from Institutionen för ekonomisk och industriell utveckling

    Author : Hampus Gavel; Petter Krus; Johan Ölvander (Andersson); Dieter Scholz; [2007]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Aircraft; morphological matrix; simulation; Saab; Gripen; TECHNOLOGY Engineering mechanics Construction engineering; TEKNIKVETENSKAP Teknisk mekanik Konstruktionsteknik;

    Abstract : The largest and most important fluid system in an aircraft is the fuel system. Obviously, future aircraft projects involve the design of fuel system to some degree. In this project design methodologies for aircraft fuel systems are studied, with the aim to shortening the system development time. READ MORE

  5. 5. On Reliability of SiC Power Devices in Power Electronics

    University dissertation from Stockholm : KTH Royal Institute of Technology

    Author : Diane-Perle Sadik; KTH.; [2017]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Silicon Carbide; Metal-Oxide-Semiconductor Field-Effect Transistor MOSFET ; Junction Field-Effect Transistor JFET ; Bipolar Junction Transistor BJT ; Reliability; Failure Analysis; Reliability Testing; Short- Circuit Currents; Humidity; Resonant converter; Series-resonant converter SLR ; Base drive circuits; Gate drive circuits; Life-Cycle Cost Analysis LCCA ; Kiselkarbid; MOSFETar; JFETar; Bipolär Junction Transistor BJT ; Tillförlitlighet; Robusthet; Felanalys; Tillförlitlighetstestning; Kortslutningsströmmar; Luftfuktighet; Resonansomvandlare; Serie-resonansomvandlare SLR ; Basdrivkretsar; Gate-drivkretsar; Felskydd; Livscykelkostnadsanalys; Electrical Engineering; Elektro- och systemteknik;

    Abstract : Silicon Carbide (SiC) is a wide-bandgap (WBG) semiconductor materialwhich has several advantages such as higher maximum electric field, lowerON-state resistance, higher switching speeds, and higher maximum allowablejunction operation temperature compared to Silicon (Si). In the 1.2 kV - 1. READ MORE