Persons at STU
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Basic information about a final thesisAdditional informationAdditional information about the final thesis follows. Click on the language link to display the information in the desired language.
|Language of final thesis:||Slovak|
|Title of the thesis:||Design of Robust PID controllers for Processes with Parametric Uncertainties in Chemical Technology|
|Summary:||The dissertation thesis deals with methods for calculating of robust P, PI, and PID controllers, which are able to control systems with parametric interval uncertainties. The basis of robust control is to design a control system, which has unchanging structure and parameters. It is able to assure control of the nominal system, as well as control of its surroundings. The wider is the surrounding area, the more robust is the controller. The methods of controller design are based on plotting the stability boundary locus in the (kp)-plane for P controller, (kp,ki)-plane for PI controller and (kp,ki,kd)-region for PID controller. Then parameters of stabilizing P, PI and PID controllers are calculated. For graphic solution and calculating P and PI controllers, programs for synthesis of robust controllers in MATLAB GUI environment were created. The script was designed to draw the polyhedrals and calculate PID controllers. Designed PI and PID controllers were then implemented in simulation experiments with a laboratory process with trasport delay. In the next part of the thesis, the synthesis of PI controllers is applied in the control of the real process. As the real process was selected a continuous-time stirred tank reactor, which is haracterized by the occurence of uncertainties during the operation. Exact values of these uncertainties are known only in some range. In this case, the equipment was used as a mixer. Obtained control results show that the methods, which were used for controller design for uncertain systems provide the required control quality.|
|Key words:||interval parametric uncertainties, PI and PID controllers, real process, robust control|
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