[CCoE Notice] Master's Thesis Defense

[Geanangel, Jane E]

Master's Thesis Defense

Name: Guoyan Cao
Title: Modeling and LPV Control for Horizontal Axis Wind Turbine
Time: 10/28/2011  11:30 am
Location: Mechanical Engineering Large Conference Room 202

Committee menbers:  Professor Karolos Grigoriadis
                                    Professor Jagannatha R. Rao
                                    Professor Michael Nikolaou
Abstract
This thesis begins with an introduction of the operation principles and the control objectives of horizontal axis wind turbines. Then by means of Kane's method, a modeling of horizontal axis wind turbines is constructed and used as plantform for linearization. Latter, 2 degrees of freedom and 8 degrees of freedom linearized models are obtained ananlyticly and numerically respectively.
Linear parameter varying (LPV) controllers are developed on the basis of the linearized models. Firstly, a generalized LPV model is identified with the wind speed as the varying parameter. Secondly, the gain-scheduling [cid:image003.png at 01CC93EC.49B95770]  control concept is used and realized in a LPV controller framework by means of the solution of linear matrices inequalities (LMIs). Thirdly, LPV controllers are designed and validated on different LPV models. Finally, the corresponding results are explained and shown to meet the control objetives.
The models of horizontal axis wind turbins are extracted from FAST code and all the simulations of LPV control are implemented in an interface of FAST with Simulink. Therefore, the background of FAST and its numerically linearization are also described in this thesis. A conclusion is presented and further work is discussed on developing multi-objective LPV controllers.

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