In this paper, an interval Type-2 fuzzy logic based pitch angle controller is proposed for fixed speed wind energy system (WES) to maintain the aerodynamic power at its rated value. The pitch angle reference is generated by the proposed controller which can compensate the non-linear characteristics of the pitch angle to the wind speed. The presence of third dimension in the Type-2 fuzzy logic c...

abstractthe liquid crystal director distribution is determined for a confined chiral nematic slab. the molecular director distribution of the field-controlled chiral nematic slab is directly calculated. the director profiles for the tilt and the twist angles, under different applied fields, are calculated in the slab with weak boundary conditions. then, the dependence of the threshold field on ...

Sangyun Lim,† Nan Li,‡ Fang Fang,‡ Mathieu Pinault,§ Codruta Zoican,‡ Chuan Wang,‡ Tarek Fadel,| Lisa D. Pfefferle,‡ and Gary L. Haller*,‡ CheVron Phillips Chemical Company, 1862 Kingwood DriVe, Kingwood, Texas 77339, Department of Chemical Engineering, Yale UniVersity, P.O. Box 208286, New HaVen, Connecticut 06520-8286, CEA Saclay, DSM/ DRECAM/SPAM, Laboratoire Francis Perrin, Bât. 522, P. 249...

Numerically minimizing a continuous free-energy functional which yields several modulated phases, we obtain the order-parameter profiles and interfacial free energies of symmetric and nonsymmetric tilt boundaries within the lamellar phase, and of interfaces between coexisting lamellar, hexagonal, and disordered phases. Our findings agree well with chevron, omega, and T-junction tilt-boundary mo...