Global ETD Search

41	An analysis of the integrated mechanical diagnostics health and usage management system on rotor track and balance / Revor, Mark S. January 2004 (has links) (PDF) Thesis (M.S. in Operations Research)--Naval Postgraduate School, June 2004. / Thesis advisor(s): Lyn R. Whitaker, Arnold H. Buss. Includes bibliographical references (p. 77-78). Also available online.
42	Aerodynamic shape optimization via control theory of helicopter rotor blades using a non-linear frequency domain approach Tatossian, Charles A. January 2008 (has links) This study presents a discrete adjoint-based aerodynamic optimization algorithm for helicopter rotor blades in hover and forward flight using a Non-Linear Frequency Domain approach. The goal is to introduce a Mach number variation into the Non-Linear Frequency Domain (NLFD) method and implement a novel approach to present a time-varying cost function through a multi-objective adjoint boundary condition. The research presents the complete formulation of the time dependent optimal design problem. The approach is firstly demonstrated for the redesign of a NACA 0007 and a NACA 23012 helicopter rotor blade section in forward flight. A three-dimensional inviscid Aerodynamic Shape Optimization (ASO) algorithm is then employed to validate and redesign the Caradonna and Tung experimental blade. The results in determining the optimum aerodynamic configurations require an objective function which minimizes the inviscid torque coefficient and maintains the desired thrust level at transonic conditions. Rotors (Helicopters) -- Aerodynamics.
43	Development and validation of a generalized ground effect model for lifting rotors Xin, Hong 08 1900 (has links) No description available. Helicopters Aerodynamics Rotors (Helicopters) Aerodynamics Aerodynamics
44	Unsteady vortex lattice aerodynamics for rotor aeroelasticity in hover and in forward flight Yoo, Kyung M. 12 1900 (has links) No description available. Aerodynamics Helicopters Aerodynamics Rotors (Helicopters) Aerodynamics
45	Modeling and nonlinear controller development for the apache helicopter using GTNONCON Lipp, Andreas Martin 12 1900 (has links) No description available. Helicopters Helicopters Control systems Mathematical optimization
46	A method for the efficient calculation of elastic rotor blade dynamic response in forward flight Taylor, Dana J. 05 1900 (has links) No description available. Aerodynamics Rotors (Helicopters) Rotors (Helicopters) Aerodynamics
47	A helicopter flight path controller design via a nonlinear transformation technique Heiges, Michael W. 05 1900 (has links) No description available. Helicopters Control systems Helicopters Flight testing
48	Unsteady compressible lifting surface analysis for rotary wings using velocity potential modes Kaladi, Vasudevan M. 08 1900 (has links) No description available. Helicopters Aerodynamics Rotors (Helicopters) Aerodynamics Aerodynamics
49	Application of a symmetric total variation diminishing scheme to aerodynamics of rotors Usta, Ebru 08 1900 (has links) No description available. Rotors (Helicopters) Helicopters Aerodynamics Aerodynamics Mathematical models
50	Application of approximation techniques to helicopter flight path optimization Boen, Gilbert E. 05 1900 (has links) No description available. Helicopters Helicopters Flight testing Mathematical optimization

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