Global ETD Search
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Showing 1 to 9 of 9 for “"helicopter rotor blade"”.
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Characterization of active fiber composite actuators for helicopter rotor blade applications
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 2001.
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Helicopter rotor blade loading calculations using an axisymmetric vortex sheet and the free wake method
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1988.
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Application of the Filtered-X LMS Algorithm for Disturbance Rejection in Time-Periodic Systems
… generalized linear, time-periodic system and the helicopter rotor blade in forward flight. Results for the generalized system show that the filtered-X LMS algorithm does converge for time-periodic disturbance inputs and can produce very small errors. For the helicopter rotor blade system the …
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Rotor Blade Flap-Lag Stability and Response in Forward Flight in Turbulent Flows
… turbulence on the coupled flap-lag motion of a helicopter rotor blade in forward flight is investigated. By assuming white noise turbulence and applying a special case of the stochastic averaging procedure, equations are developed which describe the stochastic first and second moments of the …
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A Combined Piezoelectric Composite Actuator and Its Application to Wing/Blade Tips
… as a hinge tension-torsion bar actuator for a helicopter rotor blade flap or blade tip and mirror rotational positioning. In the wing tip case, the tip deflection angle is different only according to the aerodynamic moment depending on the hinge position of the actuator along the chord and …
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Dynamical System Representation and Analysis of Unsteady Flow and Fluid-Structure Interactions
… second chapter, I investigate the flutter of a helicopter rotor blade using finite-state time approximation of the unsteady aerodynamics. The analysis showed a new stability region that could not be determined under the assumption of a quasi-steady flow. In the third chapter, I implement the …
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Numerical Simulations and Studies on Round Jet Impingement, Twin Jet Impingement and Helicopter Rotor Blades Ground Effect
… effect. The third part focuses on a 3-D helicopter rotor blade with ground effect. The result firstly demonstrated that modern technology has ability to make a well-matched CFD result. Then it explored changing pattern of the flow field with different angles of attack and non-dimensional …