Search for dissertations about: "unbalance"

Showing result 16 - 20 of 20 swedish dissertations containing the word unbalance.

  1. 16. High Power Hydrides for Hybrid Electric Vehicle Batteries

    University dissertation from Stockholm : Department of Materials and Environmental Chemistry, Stockholm University

    Author : Yang Shen; Stockholms universitet.; [2018]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Metal hydrides; NiMH batteries; Surface treatment; Ni clusters; Rare earths hydroxides; oorganisk kemi; Inorganic Chemistry;

    Abstract : Alkaline and hydrogen peroxide surface treatments have been developed to activate the surface of metal hydride alloy. AB5 type alloy is covered with a porous surface layer containing needle shaped rare earth hydroxides after etching by a potassium hydroxide solution. READ MORE

  2. 17. Concept evaluation and contact problems in simple rotordynamical systems

    University dissertation from Luleå : Luleå tekniska universitet

    Author : Magnus Karlberg; Luleå tekniska universitet.; [2003]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Datorstödd maskinkonstruktion; Computer Aided Design;

    Abstract : Rotating machines serves an important role in many different applications. Extensive research has been made, manly during the last century, in order to develop these systems and understand the dynamics. The theory of rotordynamics differs in many fundamental aspects from structural dynamics and is therefore usually treated as an own research area. READ MORE

  3. 18. Attenuation of hand-held machine vibrations. Application of non-linear tuned vibration absorber

    University dissertation from Chalmers University of Technology

    Author : Hans Lindell; Chalmers tekniska högskola.; Chalmers University of Technology.; [2017]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Transient vibration; Vibration dynamics; HAVS; Hand-arm vibration; Nonlinear tuned vibration absorber; ATVA; High frequency vibration; White finger; Auto Tuned Vibration Absorber; Impact machine; ISO 5349;

    Abstract : Vibration injury in the hand-arm system from vibrating hand-held machines is one of the most common occupational health injuries and causes severe and often chronic nerve and vascular injuries to the operator. The objective with this study is to contribute to reduce hand-arm vibration injuries, first by developing methods of redesigning machines that will lower their vibration level and second to study how high frequency vibrations (HFV) above 1250 Hz effect the finger tissue which are not included in the current standard for risk evaluation. READ MORE

  4. 19. On the dynamics of an hydropower generator subjected to unbalanced magnetic pull : characterisation and analysis

    University dissertation from Luleå : Luleå tekniska universitet

    Author : Yogeshwarsing Calleecharan; Luleå tekniska universitet.; [2010]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Hållfasthetslära; Solid Mechanics;

    Abstract : Eccentricity leading to unbalanced magnetic pull (UMP) in rotating electrical machines is a significant concern in industry. The UMP arises due to magnetic flux crossing the air-gap between the rotor and stator, and can be more intense than the useful peripheral force that the machine develops. READ MORE

  5. 20. Preimplantation genetic diagnosis : evaluation of results and experiences

    University dissertation from Stockholm : Karolinska Institutet, Dept of Molecular Medicine and Surgery

    Author : Katarina Haapaniemi Kouru; Karolinska Institutet.; Karolinska Institutet.; [2015]

    Abstract : Preimplantation genetic diagnosis (PGD) is an established alternative for couples at high risk of having an affected child, with the advantage that the genetic testing is performed at the embryo stage and the couple can thereby avoid a pregnancy termination of an affected foetus. The disadvantage is that an IVF treatment is required, which can be a stressful experience. READ MORE