Results 51 to 60 of about 891,158 (301)

Intelligent Helicopter Turbine Engine Fault Diagnosis Using Multi-Head Attention

Annual Conference of the PHM Society
A turbine engine provides power to the helicopter, enabling the helicopter to travel and hover in the air. Since the rotorcraft operates at high altitudes, ensuring safety and maintaining a healthy operational status are crucial at all times.
Yong Hun Park, Hwan Hwan In Oh, In Tae Kim, So Jung Lee, Se Hee Moon, Gyu Jin Park, Jeongho Park, Joon Ha Jung   +7 more
semanticscholar   +1 more source

Solving for Blameless and Optimal Control Under Prioritized Safety Constraints

Optimal Control Applications and Methods, EarlyView.
Summary of the proposed method for solving for blameless and optimal control sequences. ABSTRACT In many safety‐critical optimal control problems, users may request multiple safety constraints that are jointly infeasible due to external factors such as subsystem failures, unexpected disturbances, or fuel limitations.
Natalia Pavlasek, Behçet Açıkmeşe, Meeko Oishi, Claus Danielson   +3 more
wiley   +1 more source

Adaptive Control and Predictive Control for Torsional Vibration Suppression in Helicopter/Engine System

IEEE Access, 2018
In order to damp torsional vibrations in a helicopter, which would cause resonance in rotating components like engine, transmission, and rotor, an adaptive notch filter is proposed.
Yong Wang, Qian-gang Zheng, Haibo Zhang, Lizhen Miao   +3 more
semanticscholar   +1 more source

Efficacy evaluation of pneumatic solid set canopy delivery system to control powdery mildew (Erysiphe necator) in Washington vineyards

Pest Management Science, EarlyView.
The findings of this study indicate that powdery mildew control achieved with the pneumatic solid set canopy delivery system (PSD‐SSCDS) was comparable with that of a conventional airblast sprayer. These results highlight the PSD‐SSCDS as a promising alternative spray technology. Abstract BACKGROUND In this study, a previously optimized pneumatic spray
Dattatray G Bhalekar, Eric Mozzanini, Ramesh K Sahni, Michelle M Moyer, Lav R Khot   +4 more
wiley   +1 more source

THE EFFECT OF DIFFERENT OPTIONS OF BLADES MAIN ROTOR ON THE X-SHAPED TAIL ROTOR OF THE MI-171 LL

Научный вестник МГТУ ГА, 2018
This paper describes the effect of different rotor blades on the X-shaped tail rotor of the Mi-171 LL, observed conducting flight tests. The tests were carried out on the same helicopter in the similar atmospheric conditions.The objective of the tests ...
V. A. Ivchin, V. A. Nikiforov, K. Yu. Samsonov   +2 more
doaj   +1 more source

AWARE: Platform for Autonomous self-deploying and operation of Wireless sensor-actuator networks cooperating with unmanned AeRial vehiclEs [PDF]

, 2007
This paper presents the AWARE platform that seeks to enable the cooperation of autonomous aerial vehicles with ground wireless sensor-actuator networks comprising both static and mobile nodes carried by vehicles or people.
Andres, Eduardo de, Bernard, Markus, Hoesel, Lodewijk van, La Civita, Marco, Lepley, Jason, Marron, Pedro J., Ollero, Anibal   +6 more
core   +3 more sources

Neural Network‐Based Adaptive Super‐Twisting Control for Perturbed Nonlinear Systems: Lyapunov Design

International Journal of Robust and Nonlinear Control, EarlyView.
ABSTRACT A newly developed robust control strategy based on an adaptive neural network (ANN) estimator performed in concert with adaptive super‐twisting (ASTW) control is presented. The proposed adaptive robust control algorithm is applied to a class of perturbed nonlinear systems and features a significantly decreased control gain with respect to the ...
Mohammad Javad Mirzaei, Mohamed Assaad Hamida, Yuri Shtessel, Franck Plestan   +3 more
wiley   +1 more source

Environment Problems Affecting Helicopter Engine Operation [PDF]

Volume 1B: General, 1970
One of the advantages of the helicopter is to be able to undertake in roles, which for other vehicles would prove to be difficult and even impractical. When performing flying crane duties, rescue flights or military operations, it has to fly very close to the ground or the sea, land on unprepared fields and this, in open country, in the mountains or in
openaire   +1 more source

Mapping River Bed Topography in Whitewater Rapids Using Bathymetric LiDAR

River Research and Applications, EarlyView.
ABSTRACT Bathymetric LiDAR captures river topography efficiently for clear and shallow water, but for mountain rivers, whitewater rapids still pose challenges. This study proposes a novel method to enable the extraction of bottom returns specifically in turbulent whitewater sections.
Jan Rhomberg‐Kauert, Theresa Himmelsbach, Florian Pöppl, Lucas Dammert, Martin Pfennigbauer, Gottfried Mandlburger   +5 more
wiley   +1 more source

Compound cycle engine for helicopter application [PDF]

The Compound Cycle Engine (CCE) is a highly turbocharged, power compounded, ultra-high power density, light-weight diesel engine. The turbomachinery is similar to a moderate pressure ratio, free power turbine engine and the diesel core is high speed and ...
Castor, Jere G.
core   +4 more sources