Showing 2,001 - 2,020 results of 2,815 for search '"helicopters"', query time: 0.13s Refine Results
  1. 2001

    Numerical Modelling of the 3D Unsteady Flow of an Inlet Particle Separator for Turboshaft Engines by Marco Castaldi, Ignacio Mayo, Jacques Demolis, Frank Eulitz

    Published 2023-12-01
    “…Helicopter and turboprop engines are susceptible to the ingestion of debris and other foreign objects, especially during take-off, landing, and hover. …”
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    Article
  2. 2002

    Activities of the summer operation of the 53rd Japanese Antarctic Research Expedition (JARE-53) in 2011-2012 by Hisao Yamagishi

    Published 2016-12-01
    “…We managed to transport the necessities for overwintering observation using a CH-101 helicopter onboard Shirase, snow motors, and sledge caravans on the sea ice. …”
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    Article
  3. 2003
  4. 2004
  5. 2005
  6. 2006
  7. 2007

    Distribution and size of Adelie penguin colonies in Amundsen Bay, Enderby Land, Antarctica by Akinori Takahashi, Katsufumi Sato, Jun Nishikawa, Michiharu Kouno, Yasuhiko Naito

    Published 2000-03-01
    “…Adelie penguin colonies were surveyed throughout ice-free areas in Amundsen Bay, Enderby Land, from a helicopter on 23 December 1998. The locality and number of breeding pairs of three newly discovered colonies, in addition to a known colony are described. …”
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    Article
  8. 2008

    SAFETY OF COMPLEX AIRCRAFT ERGATIC SYSTEMS by Jan PIĽA, Jaroslaw KOZUBA

    Published 2019-06-01
    “…The main problem of aircraft safety is addressed to aircraft critical systems as helicopter transmission system monitoring, aircraft system integration, and system redundancy. …”
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    Article
  9. 2009
  10. 2010

    Aerogeophysical characterization of an active subglacial lake system in the David Glacier catchment, Antarctica by L. E. Lindzey, L. E. Lindzey, L. E. Lindzey, L. H. Beem, D. A. Young, E. Quartini, E. Quartini, E. Quartini, D. D. Blankenship, D. D. Blankenship, C.-K. Lee, W. S. Lee, J. I. Lee, J. Lee

    Published 2020-07-01
    “…<p>In the 2016–2017 austral summer, the University of Texas Institute for Geophysics (UTIG) and the Korea Polar Research Institute (KOPRI) collaborated to perform a helicopter-based radar and laser altimeter survey of lower David Glacier with the goals of characterizing the subglacial water distribution that supports a system of active subglacial lakes and informing the site selection for a potential subglacial access drilling project. …”
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    Article
  11. 2011

    System Identification of Heterogeneous Multirotor Unmanned Aerial Vehicle by Ayaz Ahmed Hoshu, Liuping Wang, Shahzeb Ansari, Abdul Sattar, Manzoor Hyder Alias Bilal

    Published 2022-10-01
    “…An energy efficient heterogeneous multirotor unmanned aerial system (UAS) is presented in this paper, wherein, the aerodynamical characteristics of both helicopter and quadrotor are obtained in a single multirotor design. …”
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    Article
  12. 2012

    Real-Time Improvement of a Trajectory-Tracking Control Based on Super-Twisting Algorithm for a Quadrotor Aircraft by Iván González-Hernández, Sergio Salazar, Rogelio Lozano, Oscar Ramírez-Ayala

    Published 2022-01-01
    “…This article addresses the development and experimental validation of a trajectory-tracking control for a miniature autonomous Quadrotor helicopter system (X4-prototype) using a robust algorithm control based on second-order sliding mode technique or also known as <i>super-twisting algorithm</i> in outdoor environments. …”
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    Article
  13. 2013

    A Cascaded and Adaptive Visual Predictive Control Approach for Real-Time Dynamic Visual Servoing by Sina Sajjadi, Mehran Mehrandezh, Farrokh Janabi-Sharifi

    Published 2022-05-01
    “…Simulated and experimental results show that the proposed method allows the model helicopter to servo toward the target efficiently in real-time while taking kinematic and dynamic constraints into account. …”
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    Article
  14. 2014

    Aerodynamic Uncertainty Quantification for Tiltrotor Aircraft by Ye Yuan, Douglas Thomson, David Anderson

    Published 2022-05-01
    “…However, the effects of the velocity stability and the incidence stability are the reason causing the handling qualities’ degradation in the helicopter mode and high-speed mode, respectively.…”
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    Article
  15. 2015

    Pre-slaughter handling of reindeer bulls {Rangifer tarandus tarandus L.) — effects on technological and sensory meat quality, blood metabolites and muscular and abomasal lesions by E. Wiklund, G. Malmfors, K. Lundström, C. Rehbinder

    Published 1996-01-01
    “…Forty-one reindeer bulls (age 1 1/2 years) were subjected to different pre-slaughter treatments: herding for a short distance to a grazing corral, selection by use of a lasso, lorry transport and helicopter herding for 1, 2 and 3 days respectively. …”
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    Article
  16. 2016

    Alignment of 3D Building Models and TIR Video Sequences with Line Tracking by D. Iwaszczuk, U. Stilla

    Published 2014-11-01
    “…Using a flying platform such as UAV or a helicopter for the acquisition and combining the thermal data with the 3D building models via texturing delivers a valuable groundwork for large-area building inspections. …”
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    Article
  17. 2017

    Analysis and performance evaluation of PD-like fuzzy logic controller design based on Matlab and FPGA by Obaid, Zeyad Assi, Sulaiman, Nasri, Marhaban, Mohammad Hamiruce, Hamidon, Mohd Nizar

    Published 2010
    “…Mathematical models of robot arm and bench-top helicopter are used for the purpose of simulation with the first type. …”
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    Article
  18. 2018

    HIGH RESOLUTION AIRBORNE SHALLOW WATER MAPPING by F. Steinbacher, M. Pfennigbauer, M. Aufleger, A. Ullrich

    Published 2012-07-01
    “…The operating altitude was about 500 m to maintain eye-safety, even for the aided eye, the airspeed was about 55 kts for the helicopter and 75 kts for the aircraft. The helicopter was used in the alpine regions while the fixed wing aircraft was used in the plains and the urban area, using appropriate scan rates to receive evenly distributed point clouds. …”
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    Article
  19. 2019

    Tilt perception is different in the pitch and roll planes in human by Dimitri Keriven Serpollet, David Hartnagel, Yannick James, Stéphane Buffat, Nicolas Vayatis, Ioannis Bargiotas, Pierre‐Paul Vidal

    Published 2023-02-01
    “…The vestibular perception of nine professional helicopter pilots was tested using a full flight helicopter simulator. …”
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    Article
  20. 2020

    Metrological Analysis of Precision of the System of Delivering a Water Capsule for Explosive Production of Water Aerosol by Śmigielski Grzegorz, Toczek Wojciech, Dygdała Roman, Stefański Krzysztof

    Published 2016-03-01
    “…In this paper precision of the system controlling delivery by a helicopter of a water capsule designed for extinguishing large scale fires is analysed. …”
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    Article