Search for dissertations about: "unbalance"

Showing result 1 - 5 of 17 swedish dissertations containing the word unbalance.

  1. 1. Estimation and Control of Resonant Systems with Stochastic Disturbances

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Peter Nauclér; Uppsala universitet.; Uppsala universitet.; [2008]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; vibration control; stochastic control; stochastic systems; feedforward control; Wiener filtering; Kalman filtering; wave separation; unbalance estimation; nonlinear regression; TECHNOLOGY Information technology Automatic control; TEKNIKVETENSKAP Informationsteknik Reglerteknik;

    Abstract : The presence of vibration is an important problem in many engineering applications. Various passive techniques have traditionally been used in order to reduce waves and vibrations, and their harmful effects. Passive techniques are, however, difficult to apply in the low frequency region. READ MORE

  2. 2. On Fluid Power Piston Pumps : With Special Reference to Flow Ripple Reduction

    University dissertation from Linköping : Linköpings universitet

    Author : Maria Pettersson; Linköpings universitet.; Linköpings universitet.; [1993]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Abstract : Among the major disadvantages of fluid power systems, leakage and an unpleasant sound level can be mentioned. Both drawbacks increase with increasing pressure ripple. Functional problems may be caused, even fatigue and breakdown. A main source of noise is hydrostatic pumps. READ MORE

  3. 3. Operation and control of cascaded H-bridge converter for STATCOM application

    University dissertation from Linköping : Linköpings universitet

    Author : Ehsan Behrouzian; [2016]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Modular Multilevel Converters MMC ; STATCOM; FACTS.; cascaded H-bridge converters;

    Abstract : In the last decade, particular attention has been paid to the use of Modular Multilevel Converters(MMC) for grid applications. In particular, for STATCOM applications the phase leg ofthe converter is constituted by a number of single-phase full-bridge converters connected incascade (here named Cascaded H-Bridge, CHB, converter). READ MORE

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

    University dissertation from Linköping : Linköpings universitet

    Author : Jari Repo; Högskolan Väst.; KTH.; [2010]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TECHNOLOGY Materials science; TEKNIKVETENSKAP Teknisk materialvetenskap; Manufacturing and materials engineering; Produktions- och materialteknik; Conditional monitoring; machine tool; machining process; milling; position encoders; signal analysis; TECHNOLOGY Other technology Mechanical engineering; TEKNIKVETENSKAP Övriga teknikvetenskaper Maskinteknik; condition monitoring;

    Abstract : 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. READ MORE

  5. 5. Characterization of fibroblast phenotypes in human airway remodeling

    University dissertation from Department of Experimental Medical Science, Lund Univeristy

    Author : Kristoffer Larsen; Lunds universitet.; Lund University.; [2005]
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Medicine human and vertebrates ; Medicin människa och djur ; remodeling; General biomedical sciences; Biomedicinska vetenskaper allmänt ; fibrocytes; proteoglycans; Asthma; fibroblasts;

    Abstract : Wound healing that precedes scar formation may be unbalanced under pathological conditions leading to structural changes of the tissue. At the moment, the mechanisms behind this unbalance are unclear. When these changes occur in internal organs such as the lung, they may result in organ dysfunction with fatal consequences for the patient. READ MORE