Results 81 to 90 of about 16,873 (217)

Adverse Rotorcraft-Pilot Coupling: Recent Research Activities in Europe

, 2008
Unintended and unexpected oscillations or divergences of the pilot-rotorcraft system have become a critical issue for augmented helicopters with modern flight control systems.
MASARATI P, PAVEL M, O. Dieterich, JUMP M, M. Pavel, M. Gennaretti, Dieterich, Oliver, M. Jump, H. Haverdings, Götz, Joachim, DangVu, Binh, Jump, Michael, Pavel, Marilena, Masarati, Pierangelo, Massimiliano, Genaretti, Haverdings, Henk, DIETERICH O, GÖTZ J, DANG VU B, GENNARETTI, MASSIMO, J. Gotz, B. Dang Vu, HAVERDINGS H   +22 more
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CLEANSKY green rotorcraft noise and emissions benefits – Maximizing the impact of new technologies [PDF]

, 2015
This paper describes the work done by the Green Rotorcraft (GRC) Integrated Technology Demonstrator (ITD), the Sustainable And Green Engine (SAGE) ITD and the Technology Evaluator (TE) of the CleanSky Joint Technology Initiative (JTI).
D'Ippolito, R., Thevenot, L., Pachidis, V., Stevens, J., Smith, C.   +4 more
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Rotorcraft-pilot coupling analysis through state-space aerodynamic modelling

, 2015
The terminology 'rotorcraft-pilot coupling' denotes phenomena arising from interaction between pilot and rotorcraft. Among these, the present work deals with 'pilot-assisted oscillations' that derive from unintentional pilot actions on controls due to ...
GRECO, Luciano Giovanni, SERAFINI, JACOPO, GENNARETTI, MASSIMO, Gennaretti M, Serafini J, Greco L   +5 more
core   +1 more source

Conceptual Study of a Manned European Martian Rotorcraft for Passenger and Cargo Transport in Future Mars Missions

Aerospace
This work presents a space-oriented extension of an existing research program focused on developing innovative approaches and design solutions for rotorcraft. The study builds upon recent research conducted at the Military University of Technology, where
Jakub Kocjan, Robert Rogólski, Stanisław Kachel, Łukasz Kiszkowiak   +3 more
doaj   +1 more source

Comparison between Performance Requirements for Certification and Performance Requirements for Operation of Transport Category Rotorcraft

Journal of Aerospace Technology and Management, 2022
In order to achieve aviation safety, integrity of two pillars is essential: product and operations. Regarding product integrity of transport category rotorcraft, its requirements are established in USA by the Federal Aviation Administration (FAA) Part 29,
Clementino Rodrigues Veras Neto , Donizeti de Andrade   +1 more
doaj  

Power Consumption Analysis of Rotorcraft Environmental Control Systems [PDF]

, 2014
Helicopters have now become an essential part for civil and military activities, for the next few years a significant increase in the use of this mean of transportation is expected.
Amaya Gonzalez, Hernan Andres
core   +2 more sources

An Improved PST-Based Visual Pose Estimation Algorithm for UAV Navigation

Applied Sciences
Vision-based pose estimation has been widely applied in unmanned aerial vehicle (UAV) navigation. However, existing visual pose estimation algorithms are highly sensitive to camera imaging distortion, which degrades estimation accuracy, and often suffer ...
Shengxin Yu, Jinfa Xu, Tianhan Yang
doaj   +1 more source

Research on the Simulation Method for Equivalent Stiffness of Bolted Connection Thin Plate Structures

International Journal of Aerospace Engineering
Bolted connections are widely used in assembly structures, and their dynamic characteristics are often affected by stiffness, damping, excitation, and other factors.
Zhe Chen, Qi-jun Zhao, Guo-chen Zhou
doaj   +1 more source

An rVPM-Based Aerodynamic Hybrid Optimization Method for Coaxial Rotor with Differentiated Upper and Lower Blades in Both Hover and High-Speed Cruising States

Aerospace
To enhance the performance of rigid coaxial rotors across both hovering and high-speed cruising conditions, this study develops a novel aerodynamic optimization method that differentiates between the upper and lower rotors. Utilizing the lifting line and
Zhiwei Ding, Dengyan Duan, Chaoqun Zhang, Jianbo Li   +3 more
doaj   +1 more source

Performance degradation modelling of rotorcraft engines operating in brownout conditions [PDF]

, 2018
Rotorcraft engines are subject to significant damage whilst operating in brownout conditions due to the ingestion of mineral particulates. The high pressure turbine is particularly at risk due to the deposition of molten particles on nozzle guide vanes ...
Ellis, M., Filippone, A., Bojdo, N.
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