Search for dissertations about: "chalmers tekniska högskola."

Showing result 6 - 10 of 8687 swedish dissertations containing the words chalmers tekniska högskola..

  2. 6. Robust self-localization of mobile robots in dynamic environments using scan matching algorithms

    Author : Ola Bengtsson; Christian Schlegel; Chalmers tekniska högskola Göteborg; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Mobile robot; Self-localization; Scan matching algorithm; Changed environments; Dynamic environments; o-variance matrix; Kalman filter; Signal processing; Signalbehandling;

    Abstract : The most fundamental task for any mobile robot is to perform self-localization in the world in which it is currently active, i.e. determine its position relative its world. Encoders that count wheel rotations are often used, which can be turned into relative position estimates by mean of integration. READ MORE

  4. 7. Aggregating Case Studies of Vehicle Crashes by Means of Causation Charts : An Evaluation and Revision of the Driving Reliability and Error Analysis Method

    Author : Jesper Sandin; Per Lövsund; Chalmers University of Technology; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; Accident; Cause; Classification; Characteristics; Driver; Error; 81 Road: Accidents; 81 Road: Accidents; 841 Road: Road user behaviour; 841 Road: Road user behaviour;

    Abstract : There is a need for increased knowledge about causes to motor-vehicle crashes and their prevention. Multidisciplinary in-depth case studies can provide detailed causation data that is otherwise unattainable. Such data might allow the formulation of hypotheses of causes and causal relationships for further study. READ MORE

  5. 8. Safety as a process : From risk perception to safety activity

    Author : Christina Stave; Tore J Larsson; Institutionen för produkt- och produktionsutveckling Chalmers Tekniska Högskola; []
    Keywords : SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Accident prevention; Occupation; Risk; Perception; Safety; Food; Industry; V Medicine; V Medicine; Oha Labour and labour market; Oha Labour and labour market;

    Abstract : The frequency of occupational accidents in the Swedish food industry and agriculture is high. This thesis has therefore explored the 'process of safety' in order to detect and analyse factors that either hinder or facilitate safety activity and to further develop intervention methods towards increased safety activity. READ MORE

  6. 9. Influence of combined thermal and mechanical loadings on pearlitic steel microstructure in railway wheels and rails

    Author : Dimitrios Nikas; Chalmers tekniska högskola; []
    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; Low cycle fatigue LCF ; Wheel steels; Hardness; TEM; Thermal effects; EBSD; Rail steels; Pearlite; Multiaxial fatigue; Spheroidisation; Materials Science;

    Abstract : One of the most important aspects in railway operation is the interaction between rail and wheel. The contact patch between these two components is around the size of a small coin, and since high loads act on this small area, stresses will give rise to wear and damage in both components. READ MORE

  7. 10. Test Design for Finite Element Model Updating - Identifiable Parameters and Informative Test Data

    Author : Andreas Linderholt; Thomas Abrahamsson; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; modal tests; test design; identifiability; Fisher information; optimization; data informativeness; model updating; Maskinteknik;

    Abstract : It is important to predict structural phenomena, such as noise and fatigue, stemming from vibrations. To do this, reliable structural dynamic models are needed. To be useful the models have to compare well with reality in the validation against test data; if not, the models should be modified. READ MORE