Techniques for Large, Slow Bearing Fault Detection by Eric Bechhoefer, Rune Schlanbusch, Tor Inge Waag

“…This poses a critical problem for high value assets, such as drilling equipment top drives, mining equipment, wind turbine main rotors, and helicopter swash plates. An undetected bearing fault can disrupt service, and cause delays, lost productivity, or accidents. …”
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Fault diagnosis and fault-tolerant control for system with fast time-varying delay by Xiao-Ye Xi, Jian-Fei Zhao, Ting-Zhang Liu, Li-Min Yan

“…Finally, the theory and method are validated using a real example of a helicopter system.…”
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Observations of turbulence-induced new particle formation in the residual layer by B. Wehner, H. Siebert, A. Ansmann, F. Ditas, P. Seifert, F. Stratmann, A. Wiedensohler, A. Apituley, R. A. Shaw, H. E. Manninen, M. Kulmala

“…Aerosol particle measurements in the atmospheric boundary layer performed by a helicopter-borne measurement payload and by a lidar system from a case study during the IMPACT field campaign in Cabauw (NL) are presented. …”
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Towards equitable and trustworthy genomics research by Jerome Atutornu, Richard Milne, Alesia Costa, Christine Patch, Anna Middleton

“…Capacity building globally will ensure that actual and perceived exploitation and ‘helicopter’ research could be eliminated.…”
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2-step integral backstepping control of the two-rotor aero-dynamical system (TRAS) by Haruna, Ado, Mohamed, Zaharuddin, M. Basri, M. Ariffanan, Ramli, Liyana, Alhassan, Ahmad Bala

“…This work proposes a simplified nonlinear backstepping control method for fast trajectory tracking of a 2-DOF laboratory helicopter called the Two Rotor Aero-dynamical System (TRAS). …”

REVIEW: Vital exposé, but it would have been better with more context by Philip Leslie Cass

“…Their Taliban targets were nowhere to be found: They had slipped away into the mountains and were resting peacefully when the SAS arrived by helicopter in the middle of the night.…”
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FATIGUE LIFE PREDICTION FOR ROW ANGULAR CONTACT BALL BEARINGS UNDER THERMO-MECHANICAL COUPLING BASED ON FEM by JIN Yan, LIU ShaoJun, JIANG YuXiao

“…The effect of thermo-mechanical coupling was considered in order to obtain the fatigue life of spilt torque transmission row angular contact ball bearings in helicopter. Based on the L-P fatigue life and Hertz contact theory,an mathematical model was established with the combination of Goodman formula,material P-S-N curves and EM modify rule. …”
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Adaptive Trajectory Tracking Control using Reinforcement Learning for Quadrotor by Wenjie Lou, Xiao Guo

“…In this paper, a new adaptive control algorithm under the reinforcement framework is proposed to stabilize a quadrotor helicopter. Based on a command-filtered non-linear control algorithm, adaptive elements are added and learned by policy-search methods. …”
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Experimental Results of Attitude Determination Functional Algorithms Implementation in Strapdown Inertial Navigation System by Maksim Zharkov, Konstantin Veremeenko, Ivan Kuznetsov, Andrei Pronkin

“…Attitude determination algorithms performance investigation results based on car and helicopter experimental tests are presented.…”
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Parental practices contributing to the child's neuroses emergence by Ragulina O.A., Fokina A.V.

“…Parental practices contributed to child neurotic disorders emergence is analyzed. The "helicopter parents" and "lawnmower parents" are described. …”
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Selection of Rational Scheme for Inspection of Overhead Power Transmission Lines with 35 kV Voltage and Higher by R. G. Voytko, M. A. Korotkevich

“…In the case of inspection criteria equivalence (minimum cash expenditures on inspection, minimum inspection duration, maximum quality of work execution) a scheme presupposing to use a helicopter with a scanning device is considered as the most rational one.…”
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Analiza štetnog uticaja vibracija na posadu u transportnim sredstvima vojske Srbije / Analysis of risks from crew exposure to vibrations in military transport by Snežana B. Jovanović, Aleksandar S. Đurić

“…The measuring of vibrations transmitted to the 'whole-body' and human 'hand-arm' system is carried out for helicopter, river boat and off-road vehicle crews. The measured vibrations are assessed according to the criteria of the 'health quality' level and the 'comfort quality' level.…”
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Le foncier et le territoire. Les limites d’une gouvernance de la légalisation du cannabis by Khalid Mouna

“…Thus, activists blocked the departure of a military helicopter in 2017 as a sign of protest against the annexation of agricultural lands used by cultivators of cannabis. …”
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Study on Aerodynamic Characteristics of Tilting Wing Aircraft Considering Propeller Interference by Wei Wei, Han Qing, Sang Xiaoqing, Liu Xing

“…Tilting wing aircraft not only has the ability of vertical take-off and landing like helicopter, but also be provided with high speed cruise capability as traditional fixed-wing aircraft.Tilting wing aircraft is one of the hot spots of research in both military and civilian unmanned aerial vehicles.A new layout, tilt-tandem wing and quadrotor of vertical take-off and landing(VTOL)aircraft, is proposed to avoid the defects of low aerodynamic efficiency and complicated tilting mechanism.Conceptual design and aerodynamics simulation are carried out to analyze the aerodynamic characteristics of aircraft with the interference of propellers.Further more, prototypes are made and experienced several flight tests validation.Results show that this layout can avoid the disadvantages of low efficiency propellers and complicated tilting mechanism, which is reliable and practical.…”
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Congruency between word position and meaning is caused by task Induced spatial attention by Diane Pecher, Saskia Van Dantzig, Inge Boot, Kiki Zanolie, David E Huber

“…To distinguish between these accounts we presented the same object names (e.g., shark, helicopter) in a sky decision task or an ocean decision task, such that response polarity and typical location were disentangled. …”
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Up on the table mountains in Brazil: new Bromeliaceae and Eriocaulaceae (Poales) from the Pantepui in the Guayana Shield by Rafael Barbosa-Silva, Marcelo Trovó, Gustavo Martinelli, Rafaela Forzza

“…About one fifth of Pantepui angiosperm species are distributed in Poales, a highly diverse angiosperm order.Methods – Recent field trips were carried out on two Brazilian tepuis, by foot and helicopter. Herbarium collections were consulted and compared with the proposed new species. …”
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Impact of dust erosion on the reduction of axial compressor efficiency of a turboshaft engine and on the stability of its operation by Hocko Marián, Al-Rabeei Samer

“…This process is analyzed based on the obtained data by operating TV3-117 helicopter turboshaft engines in high dust atmosphere conditions. …”
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A Neural Network Based Landing Method for an Unmanned Aerial Vehicle with Soft Landing Gears by Cai Luo, Weikang Zhao, Zhenpeng Du, Leijian Yu

“…With full consideration of unmanned aerial vehicles and landing gear requirements, a quadrotor helicopter, comprised of one flying unit and one landing assistance unit, is employed. …”
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L[subscript 1] Adaptive Control for Indoor Autonomous Vehicles: Design Process and Flight Testing by How, Jonathan P., Michini, Bernard J.

“…Flight test results verify the process for an indoor autonomous quadrotor helicopter, demonstrating that designer specifications correspond to the expected physical responses. …”
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Robust tubes in nonlinear model predictive control by Cannon, M, Buerger, J, Kouvaritakis, B, Raković, S

“…The strategy is applied to a simulated fixed-rotor helicopter. © 2010 IFAC.…”