Sökning: "dynamic stability"

Visar resultat 1 - 5 av 414 avhandlingar innehållade orden dynamic stability.

  1. 1. Dynamic Models of Wind Turbines

    Författare :Abram Perdana; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; frequency stability; variable-speed; modeling; power system stability; validation; aggregated model; fixed-speed; voltage stability; wind turbine;

    Sammanfattning : The impact of wind power generation in the power system is no longer negligible. Therefore, there is an urgent need for wind turbine models that are capable of accurately simulating the interaction between wind turbines or wind farms and the power system. LÄS MER

  3. 2. Transforming the City of Kiruna : Stabilizing Change and Changing Stability

    Författare :Chelsey Jo Huisman; Anna Bengtson; Susanne Åberg; Wendy Smith; Uppsala universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Change; Changing; Dialectical Process; Duality; Interaction; Interdependent Contradiction; Interorganizational Projects; Interorganizational Relationships; Process Perspective; Stability; Stabilizing; Transformation; Business Studies; Företagsekonomi;

    Sammanfattning : With so much focus on change and transformation in the organizing of projects, stability is commonly separated from change and relegated to be a static characteristic. This gives the impression that stability is not even a part of the process of organizing a project. LÄS MER

  4. 3. Static Visualizations for Dynamic Hierarchies

    Författare :Wiebke Köpp; Tino Weinkauf; Vijay Natarajan; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Dynamic hierarchies; Static visualization; Pixel-based visualization; Scalar data; Topology; Layout stability; Dynamiska hierarkier; Statisk visualisering; Pixelbaserad visualisering; Skalärdata; Topologi; Layout-stabilitet; Datalogi; Computer Science;

    Sammanfattning : Dynamic hierarchical data describes phenomena in a wide range of domains, from file management to demographics and business administration, as well as feature extraction results in spatial scientific data. As with all data, visualization is an integral step for gaining understanding about dynamic hierarchical data. LÄS MER

  5. 4. Analysis and Design of Hybrid Systems

    Författare :Stefan Pettersson; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; asymptotic stability; Lyapunov theory; exponential stability; piecewise quadratic Lyapunov functions; hybrid systems; stability; linear matrix inequalities; nonlinear systems; LMIs; control theory; fuzzy systems;

    Sammanfattning : Many physical systems today are modeled by interacting continuous and discrete event systems. Such hybrid systems contain both continuous and discrete states that influence the dynamic behavior. LÄS MER

  7. 5. Model-Based Investigation of Machining Systems Characteristics : Static and Dynamic Stability Analysis

    Författare :Andreas Archenti; Mihai Nicolescu; Amir Rashid; KTH; []
    Nyckelord :Machining systems; modelling; TECHNOLOGY; TEKNIKVETENSKAP;

    Sammanfattning : The increasing demands for precision and efficiency in machining call for new control strategies for machining systems based on the identification of static and dynamic characteristics under operational conditions. By considering the machining system as a closed-loop system consisting of a machine tool structure and a machining process, the join system characteristics can be analyzed. LÄS MER