An Improved Fuzzy Parallel Distributed –Like Controller for Multi-Input Multi-Output Twin Rotor System by Mahmoud, Thair Sh.

“…Twin Rotor Multi Input Multi Output (MIMO) System (TRMS) is a laboratory set-up design for which it has been used for control experiments, control theories developments, and applications of the autonomous helicopter. Fuzzy Logic Control (FLC) has been widely used with different control schemes to cope with control objectives of TRMS. …”
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Doppler Beam Sharpening Using Estimated Doppler Centroid Based on Edge Detection and Fitting by Deqing Mao, Yongchao Zhang, Yin Zhang, Yulin Huang, Jianyu Yang

“…Doppler beam sharpening (DBS) technology is widely used in applications, such as helicopter rescue and early warning surveillance. To obtain the desired DBS images with high quality, accurate Doppler centroid estimation (DoCE) is necessary. …”
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On the multipath effects due to wall reflections for wave reception in a corner by Campos Luiz Manuel Braga da Costa, dos Santos Silva Manuel José, da Fonseca Agostinho Rui Alves

“…Multipath effects occur when receiving a wave near a corner, for example, the noise of an helicopter or an aircraft or a drone or other forms of urban air mobility near a building, or a telecommunications receiver antenna near an obstacle. …”
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Analysis of the Aeroacoustic Characteristics of a Rigid Coaxial Rotor in Forward Flight Based on the CFD/VVPM Hybrid Method by Yucheng Yang, Guohua Xu, Yongjie Shi, Zhiyuan Hu

“…The aerodynamic load of the “AH-1G” helicopter rotor is first calculated based on the hybrid method and compared with available experimental data. …”
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Role of echocardiography in diagnosis and management of complete papillary muscle rupture caused by myocardial infarction by Josip Vincelj, Stanko Biočić, Mario Udovičić, Mario Sičaja, Sandra Jakšić Jurinjak

“…Massive mitral regurgitation developed in both followed by rapid deterioration of hemodynamic state and severe heart failure, because of which both were transferred by helicopter to the Coronary Care Unit of our clinic. …”
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Thermal Elastohydrodynamic Lubrication Analysis of High-Speed and Light-Load Rolling Bearing with Double Rings Rotation by Junning Li*, Ka Han, Qian Wang, Wuge Chen, Jiafan Xue

“…This manuscript can serve as a reference for research on the life and reliability of helicopter engine bearings under various rotation conditions.…”
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Airborne HPGe spectrometer for monitoring of air dose rates and surface activities by Marcel Ohera, Lubomír Gryc, Irena Češpírová, Jan Helebrant, Lukáš Skála

“…The system was calibrated for the local air kerma rates measured on helicopter board and its conversion to the air kerma rates at 1 m above the ground was proposed. …”
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Modelling Green VTOL Concept Designs for Reliability and Efficiency by Julian David Booker, Caius Patel, Phillip Mellor

“…Two main case studies are then presented: an electric tail rotor retrofitted to an existing turbine powered helicopter (hybrid) and an eVTOL aircraft (all-electric), demonstrating the impact of multiplex level and number of propulsion channels on meeting target reliabilities. …”
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Effects of nitrogen fertilization on the ground vegetation cover and soil chemical properties in Scots pine and Norway spruce stands by Johanna Jetsonen, Annamari Laurén, Heli Peltola, Olli Muhonen, Juha Nevalainen, Veli-Pekka Ikonen, Antti Kilpeläinen, Eeva-Stiina Tuittila, Elisa Männistö, Nicola Kokkonen, Marjo Palviainen

“…The fertilizer was applied using a helicopter in the spruce stands and a forwarder in the pine stands. …”
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Retrieval of the thickness of undeformed sea ice from simulated C-band compact polarimetric SAR images by X. Zhang, W. Dierking, J. Zhang, J. Meng, H. Lang

“…In comparison with results from helicopter-borne measurements, we tested different empirical equations for the retrieval of ice thickness. …”
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Suppression of the Attitude Error With a Modified Iterative Algorithm for Apparent Resistivity Imaging in GAFDEM Survey by Changsheng Liu, Lili Kang, Wenjie Zhu, Haigen Zhou, Ming Zhang, Jie Liang

“…Due to the separated system structure, the attitude error in GAFDEM survey is significantly different from that in traditional airborne helicopter frequency-domain electromagnetic survey. …”
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Development and Evaluation of a UAV-Photogrammetry System for Precise 3D Environmental Modeling by Mozhdeh Shahbazi, Gunho Sohn, Jérôme Théau, Patrick Menard

“…The hardware of the system consists of an electric-powered helicopter, a high-resolution digital camera and an inertial navigation system. …”
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Critical care medicine in the French Territories in the Americas: Current situation and prospects by Hatem Kallel, Dabor Resiere, Stéphanie Houcke, Didier Hommel, Jean Marc Pujo, Frederic Martino, Michel Carles, Hossein Mehdaoui

“…In addition, seriously ill patients in remote areas regularly have to be transferred, most often by helicopter, resulting in a delay in admission to intensive care. …”
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Experimental Investigation of Lift Enhancement and Drag Reduction of Discrete Co-Flow Jet Rotor Airfoil by Shunlei Zhang, Xudong Yang, Bifeng Song, Zhuoyuan Li, Bo Wang

“…How to significantly improve the maximum lift coefficient and lift-to-drag ratio of rotor airfoil is a fundamental problem, which should be solved urgently in the development of high-performance helicopter rotor blades. To address this, discrete co-flow jet (DCFJ) technology is one methods with the most potential that can be harnessed to improve the performance of the rotor airfoil. …”
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Experimental studies of linear quadratic regulator (LQR) cost matrices weighting to control an accurate take-off position of bicopter unmanned aerial vehicles (UAVs) by Jalu Ahmad Prakosa, Hai Wang, Edi Kurniawan, Swivano Agmal, Muhammad Jauhar Kholili

“…The 3 degree of freedom (DOF) helicopter facility is a suitable bicopter experimental simulator to test its complex multiple input multiple output (MIMO) flight control model to respond to the challenge of multipurpose drone control strategies. …”
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Mental Overload Assessment Method Considering the Effects of Performance Shaping Factors by Xin Lu, Jianbin Guo, Shengkui Zeng, Haiyang Che

“…The proposed method is applied to an accident involving a helicopter crash that occurred in Maryland, and the results show that, in comparison with the VACP method, the proposed method can more effectively identify the state of mental overload and provide a more rational explanation of the process of the accident.…”
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Hazard forecasting techniques implementation in crane safety instruments using a crane anemometer by V. A. Roshchin, S. D. Ivanov, A. N. Nazarov

“…The method of calculation of gust velocity and average wind velocity from the data of the pulse sensor of the helicopter anemometer is presented. The method of wind speed forecasting based on the construction of an extrapolation function is given.Results. …”
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A Novel Data Augmentation Method for Detection of Specific Aircraft in Remote Sensing RGB Images by Yiming Yan, Yumo Zhang, Nan Su

“…We refer to military aircraft and helicopter as specific aircraft. Due to the number of remote sensing images of specific aircraft is far less than that of civil aircraft, it is difficult to train an ideal detection model only by using the available specific aircraft images. …”
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Designing Robust Prioritization Paradigm Focusing on Strategic Industries by Mahdi Ahmadian, Abdurrahim Pedram, Salman Zali

“…The most important achievement of this rescarch is optimization and quality upgrade of this paradigm by implementing it practically in a strategic defense industry of anti-helicopter systems, reaching desired results.…”
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Flight Test Result for the Ground-Based Radio Navigation System Sensor with an Unmanned Air Vehicle by Jaegyu Jang, Woo-Guen Ahn, Seungwoo Seo, Jang Yong Lee, Jun-Pyo Park

“…A flight test with an unmanned helicopter was conducted to verify the implemented navigation sensor. …”
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