@article {52,
	title = {Optimal gain-scheduled control of fixed-speed active stall wind turbines},
	journal = {Renewable Power Generation, IET},
	volume = {2},
	year = {2008},
	month = {December},
	pages = {228-238},
	abstract = {<p>For a smooth integration of large wind farms into the utility grids, the individual wind turbines must be able to achieve various power control objectives. In this context, the authors focus their attention on the control of fixed-speed active stall wind turbines. This sort of turbine includes a pitch servomechanism to induce stall on the blades, thereby having control on the output power. The authors develop a methodology to design optimal gain-scheduled pitch controllers valid for the whole operating region of the wind turbine. The proposed solution uses concepts of linear parameter-varying system theory. In addition to providing a formal framework for the control design, this theory guarantees stability and performance. Further, because of the similarities with Hinf control, the tools developed for the controller design are very familiar to the control community. The main features of the proposed controller are assessed by means of numerical simulations obtained for realistic wind speed profiles and power production demands.</p>
},
	keywords = {fixed-speed active stall wind turbines, Hinf control, Hinfin control, linear parameter-varying system theory, linear systems, optimal gain-scheduled control, pitch servomechanism, power generation control, power production demands, wind farms, wind speed profiles, wind turbines},
	issn = {1752-1416},
	doi = {10.1049/iet-rpg:20070106},
	url = {http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=4610980\&tag=1},
	author = {Bianchi, Fernando D. and De Battista, Hern{\'a}n and Mantz, Ricardo J.}
}
@article {65,
	title = {Comments on "variable-structure PID control to prevent integrator windup"},
	journal = {Industrial Electronics, IEEE Transactions on},
	volume = {51},
	year = {2004},
	month = {June},
	pages = {736-738},
	abstract = {<p>In the paper by Hodel and Hall, the authors introduce a variable-structure proportional-integral-derivative controller with antiwindup features and compare it with other simple antiwindup methods. It is pointed out here that the conclusions reached from the comparative example are incorrect as the performance of the controllers is not appropriately compared.</p>
},
	keywords = {Antiwindup, antiwindup features, Control nonlinearities, Control systems, controllers, Degradation, Furnaces, integrator windup protection, Internet, linear systems, Nonlinear control systems, performance limitations, PID control, Proportional control, proportional-integral-derivative controller, three-term control, variable structure systems, variable-structure systems, Windup},
	issn = {0278-0046},
	doi = {10.1109/TIE.2004.825205},
	url = {http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=1302353},
	author = {Mantz, Ricardo J. and De Battista, Hern{\'a}n}
}
