Sökning: "PI control"

Visar resultat 6 - 10 av 75 avhandlingar innehållade orden PI control.

  1. 6. PID Control, Design, Extension, Application

    Författare :Helene Panagopoulos; Institutionen för reglerteknik; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; control engineering; PID control. Design. Optimization. Load disturbance rejection. Measurement noise filtering. Set point response. Robustness. Sensitivity. H-infinity control. Undamped process modes. Active control. Allpass and bandpass filter. Evaluation. Steam generator. Pulp and paper.; robotics; Automation; Automatiska system; robotteknik; reglerteknik;

    Sammanfattning : This thesis considers the design of PID controllers, the extensions of these controllers to improve their performance, and the applications of these design methods to industrial processes. New tuning methods for PI and PID controllers have been presented. These methods uses a model of the process to be controlled, given as a transfer function. LÄS MER

  3. 7. Averaging level control in the presence of frequent inlet flow upsets

    Författare :Peter Rosander; Alf J. Isaksson; Johan Löfberg; Morten Hovd; Linköpings universitet; []
    Nyckelord :Averaging level control; PI control; Surge tanks; Optimal control; Robust MPC; Process control;

    Sammanfattning : Buffer tanks are widely used within the process industry to prevent flow variations from being directly propagated throughout a plant. The capacity of the tank is used to smoothly transfer inlet flow upsets to the outlet. Ideally, the tank thus works as a low pass filter where the available tank capacity limits the achievable flow smoothing. LÄS MER

  4. 8. Overload Control and Performance Evaluation of Web Servers

    Författare :Mikael Andersson; Institutionen för elektro- och informationsteknik; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; system; numerisk analys; Datalogi; control; systems; numerical analysis; Computer science; Content Adaptation; Admission Control; Overload Control; Web servers; Performance modeling; kontroll; Technological sciences; Teknik; Systems engineering; computer technology; Data- och systemvetenskap; Telecommunication engineering; Telekommunikationsteknik;

    Sammanfattning : We are increasingly dependent on Internet as a large aspect of our daily life is now handled via online applications. Recent years we have seen several large-scale crises. This has made crisis-related research on Internet applications important. LÄS MER

  5. 9. Computational Stability and Adaptive Strategies - An Experimental Study of ODE Software

    Författare :Lina Wang; Matematik LTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; algorithm analysis; Mathematical software; RADAU5; DASSL; digital filters; PI control; adaptive time-stepping; stepsize control; computational stability; test protocol; Computer science; numerical analysis; systems; control; Datalogi; numerisk analys; system; kontroll;

    Sammanfattning : The algorithmic content of adaptive ODE/DAE software is dominated by a considerable amount of control structures, support algorithms and logic. The control logic has been largely heuristic and lacking support by analysis. LÄS MER

  7. 10. Disruption of vitamin A metabolism by dioxin

    Författare :Pi Högberg; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :TCDD; dioxin; vitamin A; retinoic acid; cellular retinol-binding protein; bone;

    Sammanfattning : Vitamin A (retinoids) is a nutrient that plays a central role in development and remains essential for cell growth and differentiation throughout life. Dioxins are polychlorinated organic pollutants known to negatively affect the storage and body clearance of retinoids. LÄS MER