Results 11 to 20 of about 1,393 (153)

A Novel Emergent State Control Law for an Integrated Helicopter/Turboshaft Engine System [PDF]

open access: yesMathematical Problems in Engineering, 2014
A two‐layer robust control scheme is proposed to get a better response ability for emergency maneuvers of helicopter. Note that the power used in ascending flight is the main coupling between helicopter and its turboshaft engines; therefore vertical flight control is separated from conventional helicopter control loops and combined with fuel flow and ...
Haibo Zhang, Yongjin Li, S. Deng
openaire   +4 more sources

Method for Helicopter Turboshaft Engines Controlling Energy Characteristics Through Regulating Free Turbine Rotor Speed and Fuel Consumption Based on Neural Networks

open access: yesEnergies
This research is devoted to the development of a method for helicopter turboshaft engine energy characteristics control by regulating the free turbine rotor speed and fuel consumption using neural network technologies.
Serhii Vladov   +2 more
exaly   +3 more sources

Fuel cells: a real option for Unmanned Aerial Vehicles propulsion. [PDF]

open access: yesScientificWorldJournal, 2014
The possibility of implementing fuel cell technology in Unmanned Aerial Vehicle (UAV) propulsion systems is considered. Potential advantages of the Proton Exchange Membrane or Polymer Electrolyte Membrane (PEMFC) and Direct Methanol Fuel Cells (DMFC), their fuels (hydrogen and methanol), and their storage systems are revised from technical and ...
González-Espasandín Ó   +2 more
europepmc   +2 more sources

Impact of dust erosion on the reduction of axial compressor efficiency of a turboshaft engine and on the stability of its operation [PDF]

open access: yesMATEC Web of Conferences, 2022
This paper aimed to solve the impact of operational abrasive wear on the rotor blades of the axial compressor of the turboshaft engine on the decrease in its total compression efficiency ηCt and its transition into unstable work mode (surge).
Hocko Marián, Al-Rabeei Samer
doaj   +1 more source

Development of the helicopter turboshafted engine regulator

open access: yesAerospace Technic and Technology, 2023
The subject of research was the development of the RDC-450M-117V – the TV3-117VMA-SBM1V digital engine regulator – based on the RDC-450M previously created at the enterprise for the AI-450M engine, considering differences in engine characteristics and exploitation conditions.
Gennadii Ranchenko   +4 more
openaire   +2 more sources

Forming of turboshaft engine mathematical model

open access: yesАвіаційно-космічна техніка та технологія, 2023
The subject of the study is the process of forming a mathematical model (MM) of a turboshaft gas turbine engine and a twin-engine helicopter power plant, which provides the determination of parameters of the working process in steady and transient ...
Sergiy Yepifanov, Oleksii Bondarenko
doaj   +1 more source

Energy and Exergy Analysis on a Waste Heat Recovery Module for Helicopters

open access: yesIEEE Access, 2021
The exhaust of turboshaft engines contains a big amount of waste heat but does not provide propulsion power to the helicopter. Reusing the heat can increase fuel efficiency and reduce carbon emissions of the engine.
Yuxue Ge, Yuhao Wei, Qian Zhao, Yang Pei
doaj   +1 more source

DIAGNOSTIC MODEL OF HELICOPTER TURBOSHAFT ENGINE

open access: yesIzvestiya of Samara Scientific Center of the Russian Academy of Sciences, 2023
The article presents a qualitative assessment of the impact on the engine components characteristics of the malfunction occurrence in the flow part of the aviation gas turbine engines, which lead to changes in its geometry. Using the example of a compressor, it is shown that when defects appear in it, two of its characteristics are deformed: efficiency
V.P. Kazhaev, D.Y. Kiselev, Y.V. Kiselev
openaire   +1 more source

Measurement of black carbon emissions from multiple engine and source types using laser-induced incandescence: sensitivity to laser fluence [PDF]

open access: yesAtmospheric Measurement Techniques, 2022
A new regulatory standard for non-volatile particulate matter (nvPM) mass-based emissions from aircraft engines has been adopted by the International Civil Aviation Organisation.
R. Yuan   +6 more
doaj   +1 more source

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