Synthesis and fuzzy logic control of flexible rotor systems with active magnetic suspensions /
This dissertation presents the approaches on the analysis and synthesis of magnetic suspension controller design and digital implementation. A finite element (FE) based, flexible shaft supported by magnetic bearings (MB) is first studied in a closed loop system with a conventional controller. The FE...
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| Format: | Thesis Book |
| Language: | English |
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[Place of publication not identified] :
[publisher not identified] ;
2001.
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| Online Access: | http://proxy.library.tamu.edu/login?url=http://proquest.umi.com/pqdweb?did=726103081&sid=1&Fmt=2&clientId=2945&RQT=309&VName=PQD |
| Summary: | This dissertation presents the approaches on the analysis and synthesis of magnetic suspension controller design and digital implementation. A finite element (FE) based, flexible shaft supported by magnetic bearings (MB) is first studied in a closed loop system with a conventional controller. The FE model of the rotor system is employed to develop a magnetic suspension compensator to provide reliable operation and good disturbance rejection from zero to nominal operating speed. Based on the fully nonlinear magnetic bearing model, a later model fuzzy logic controller is utilized to obtain an improved performance of a high order nonlinear system for a large motion tracking problem. Analytical formulation of a fuzzy logic controller (FLC) is given based on Tagaki-Sugeno-Kang (TSK) architecture to deal with all nonlinearities of the system. An algorithm for approximating the TSK model to the Mamdani model is then developed. Finally, a digital signal processor (DSP) is used to implement the controller on a real time basis. A method to use the LabVIEW package for auxiliary signal processing as well as a friendly graphical user interface is developed. |
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| Item Description: | Vita. "Major Subject: Mechanical Engineering". |
| Physical Description: | xiii, 235 leaves : illustrations ; 28 cm. Issued also on microfiche from University Microfilm Inc. |
| Bibliography: | Includes bibliographical references (leaves 230-234). |