Results 51 to 60 of about 6,732 (195)

A strategy for advancing tilt-rotor technology [PDF]

Tilt-rotor technology has many features which make it a very promising development in aviation which might have application to a wide variety of transportation and logistics situations.
Morlok, Edward K., Schoendorfer, David L.   +1 more
core   +1 more source

Mathematical modeling and control of a tilt-rotor aircraft

, 2015
This paper presents a novel model of large-size tilt-rotor aircraft, which can operate as a helicopter as well as being capable of transition to fixed-wing flight.
Cai, Lilong, Wang, Xinhua
core   +2 more sources

Speed benefits of tilt-rotor designs for LHX [PDF]

The merits of an advanced helicopter and a tilt rotor aircraft for light utility, scout, and attack roles in combat missions envisioned for the year 2000 and beyond were compared.
Adams, J. V., Balberde, A., Dereska, S. P., Gearin, C. J., Mcdaniel, R. L., Shaw, D. E.   +5 more
core   +1 more source

Rotorcraft aeroelastic stability [PDF]

Theoretical and experimental developments in the aeroelastic and aeromechanical stability of helicopters and tilt-rotor aircraft are addressed. Included are the underlying nonlinear structural mechanics of slender rotating beams, necessary for accurate ...
Hodges, Dewey H., Ormiston, Robert A., Peters, David A., Warmbrodt, William G.   +3 more
core   +1 more source

Multi-Parameter Measurement of Rotors Using the Doppler Effect of Frequency-Swept Interferometry

Sensors, 2020
The Doppler effect of frequency-swept interferometry (FSI) is often seen as an obstacle to the dynamic ranging accuracy. However, the potential of this obstacle is rarely noticed and used. In this paper, by combining the periodical characteristics of the
Bin Shao, Wei Zhang, Peng Zhang, Weimin Chen   +3 more
doaj   +1 more source

Aeroelastic optimization of a composite tilt rotor

39th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference and Exhibit, 1998
Composite tilt rotor aeroelastic optimization is performed by using a mixed variational formulation based on exact intrinsic equations of motion for moving beams and a finite-state dynamic inflow theory. A composite box-beam model is used to represent the principal load carrying member of the rotor blade. The blade is discretized using finite elements.
Omer Soykasap, Dewey Hodges
openaire   +1 more source

A CFD study of tilt rotor flowfields [PDF]

The download on the wing produced by the rotor wake of a tilt rotor vehicle in hover is of major concern because of its severe impact on payload-carrying capability.
Fejtek, Ian, Roberts, Leonard
core   +1 more source

Pigeon-Inspired Transition Trajectory Optimization for Tilt-Rotor UAVs

Drones
The continuous configuration changes and velocity variations of tilt-rotor UAVs during the transition phase pose significant challenges to flight safety. Hence, the transition phase trajectory must be specially designed.
Jinlai Deng, Yunjie Yang, Jihong Zhu, Wenan Liao, Xiaming Yuan, Xiangyang Wang   +5 more
doaj   +1 more source

The XV-15 tilt rotor research aircraft [PDF]

The design characteristics of the XV-15 Tilt rotor research aircraft are presented. Particular attention is given to the following: control system; conversion system; and propulsion system.
Dugan, D. C., Erhart, R. G., Schroers, L. G.   +2 more
core   +1 more source

Active Disturbance Rejection Flight Control and Simulation of Unmanned Quad Tilt Rotor eVTOL Based on Adaptive Neural Network

Drones
The unmanned quad tilt-rotor eVTOL (QTRV) is a variable-configuration aircraft that combines the features of vertical takeoff and landing (VTOL), hovering, and high-speed cruising, making its control system design particularly challenging.
Bohai Deng, Jinfa Xu, Xingyu Yuan, Shengxin Yu   +3 more
doaj   +1 more source