Results 111 to 120 of about 3,036 (184)
Pitch control optimisation of tiltrotor aircraft
, 2021 An investigation into the effects of rotary-wing and xed-wing control gearings for tiltrotor aircraft was undertaken. The work investigated the effects of different cyclic and elevator gearings (both prescribed and optimised) on the longitudinal trim behaviour through the conversion regime of ight. The numerical simulations were performed for the XV-15
Appleton, Wesley +3 more
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Applied SciencesIn recent years, there has been a significant amount of research on tiltrotor multicopter unmanned aerial vehicles (TM-UAVs) in aerial robotics. Despite the varying frame types of TM-UAVs, they all still aim to decouple the propeller from the body, which
Xiaodi Tao, Seong Young Ko
doaj +1 more source
Tiltrotor research aircraft composite blade repairs: Lessons learned [PDF]
The XV-15, N703NA Tiltrotor Research Aircraft located at the NASA Ames Research Center, Moffett Field, California, currently uses a set of composite rotor blades of complex shape known as the advanced technology blades (ATBs). The main structural element
Espinosa, Paul S., Groepler, David R.
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AerospaceIn the vertical take-off and landing (VTOL) state of tiltrotor aircraft, the inlet entrance encounters the incoming airflow at a 90° attack angle, resulting in highly complex internal flow characteristics that are extremely susceptible to gusts ...
Haicheng Zhu +6 more
doaj +1 more source
Loads Correlation of a Full-Scale Proprotor on the Tiltrotor Test Rig [PDF]
In 2018, a full-scale isolated proprotor test was conducted in the USAF National Full-Scale Aerodynamics Complex (NFAC) at NASA Ames. The test article was the 3-bladed Bell 699 research rotor derived from the AW609 rotor.
Kottapalli, Sesi
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Design, Modeling, and Control of a Composite Tilt-Rotor Unmanned Aerial Vehicle
DronesTilt-rotor unmanned aerial vehicles combine the advantages of multirotor and fixed-wing aircraft, offering features like rapid takeoff and landing, extended endurance, and wide flight conditions.
Zhuang Liang +3 more
doaj +1 more source
Analysis of One-Dimensional Ivshin-Pence Shape Memory Alloy Constitutive Model for Sensitivity and Uncertainty. [PDF]
Materials (Basel), 2020 Islam ABMR, Karadoğan E.
europepmc +1 more source
Threats from and Countermeasures for Unmanned Aerial and Underwater Vehicles. [PDF]
Sensors (Basel), 2022 Khawaja W +5 more
europepmc +1 more source
Accessibility Design and Operational Considerations in the Development of Urban Aerial Mobility Vehicles and Networks [PDF]
Urban aerial mobility vehicles and networks have recently gained considerable interest in the aviation community. These small, short-range vehicles with all-electric or hybrid-electric propulsion systems, tailored to metropolitan aerial transportation ...
Young, Larry A.
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Tube-Based Model Predictive Control Based on Constrained Zonotopes
IEEE AccessThis paper introduces a tube-based Model Predictive Control (MPC) formulation for high-order uncertain Linear Parameter-Varying (LPV) systems, utilizing efficient set representations.
Richard Andrade +2 more
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