Results 41 to 50 of about 891,158 (301)

Justification of geometric parameters of the engine air particle separator

Вестник Самарского университета: Аэрокосмическая техника, технологии и машиностроение, 2022
The Engine Air Particle Separator is considered to be the most important element for maintaining the performance of helicopter engines when operating in dusty air conditions.
A. S. Gishvarov, A. Rh. Rakhimov
doaj   +1 more source

Guiding Healthcare Organizations in Strategic Pathways: Assessing a Dynamic Adaptive Model

The International Journal of Health Planning and Management, EarlyView.
ABSTRACT In an era of increasing uncertainty and complexity, healthcare decision makers must navigate dynamic environments with greater awareness and adaptability. This study assesses what the impact is of the Dynamic Adaptive Decision Support model (DADS) on stewarding capacity by fostering adaptability, resilience, and strategic foresight.
Anke Aarninkhof‐Kamphuis, Hans Voordijk, Geert Dewulf   +2 more
wiley   +1 more source

Effect of Bearing Support Parameters on the Radial and Angular Deformation of Rotor Shaft Gear Based on CRDRS Support Configuration with Intermediate Bearing Support

Machines
The rotor shaft is a critical component responsible for transmitting engine power to the helicopter’s rotor. Deformation of the rotor shaft can affect the meshing performance of the output stage gears in the main gearbox, thereby affecting load transfer ...
Xiaojie Yuan, Xiaoyu Che, Rupeng Zhu, Weifang Chen   +3 more
doaj   +1 more source

Onboard Neuro-Fuzzy Adaptive Helicopter Turboshaft Engine Automatic Control System

Energies
A modified onboard neuro-fuzzy adaptive (NFA) helicopter turboshaft engine (HTE) automatic control system (ACS) is proposed, which is based on a circuit consisting of a research object, a regulator, an emulator, a compensator, and an observer unit.
Serhii Vladov, Maryna Bulakh, V. Vysotska, Ruslan Yakovliev   +3 more
semanticscholar   +1 more source

Applicability of the steady‐state oxygen stable isotope method for estimating metabolism in low‐productivity Arctic lakes

Limnology and Oceanography: Methods, EarlyView.
Abstract Metabolism is a key property of lake ecosystem functioning, but logistical challenges make it difficult to estimate across remote regions. The steady‐state dissolved oxygen (DO) stable isotope method (18O method) estimates metabolism from discrete water samples and thus enables large‐scale surveys.
Fredrik Alriksson, Marcus Klaus, Cristian Gudasz, Matthew Bogard, Gerard Rocher‐Ros, Dominic Vachon, Jan Karlsson   +6 more
wiley   +1 more source

Statistical learning for turboshaft helicopter accidents using logistic regression.

PLoS ONE, 2020
The objective of this work is to advance the understanding of helicopter accidents by examining and quantifying the association between helicopter-specific configurations (number of main rotor blades, number of engines, rotor diameter, and takeoff weight)
Rachmat Subagia, Joseph Homer Saleh, Jared S Churchwell, Katherine S Zhang   +3 more
doaj   +1 more source

Assessing Helicopter Turbine Engine Health: A Simple Yet Robust Probabilistic Approach

Annual Conference of the PHM Society
This paper presents a data-driven approach for assessing the health of helicopter turbine engines, developed for the PHM North America 2024 Conference Data Challenge.
Peihua Han, Qin Liang, Erik Vanem, K. E. Knutsen, Houxiang Zhang   +4 more
semanticscholar   +1 more source

Ellipsoid‐Based Interval‐Type Uncertainty Model Updating Based on Riemannian Manifold and Gaussian Process Model

International Journal of Mechanical System Dynamics, EarlyView.
ABSTRACT Modern engineering systems require advanced uncertainty‐aware model updating methods that address parameter correlations beyond conventional interval analysis. This paper proposes a novel framework integrating Riemannian manifold theory with Gaussian Process Regression (GPR) for systems governed by Symmetric Positive‐Definite (SPD) matrix ...
Yanhe Tao, Qintao Guo, Jin Zhou, Cheng Yi   +3 more
wiley   +1 more source

An Innovative Applied Control System of Helicopter Turboshaft Engines Based on Neuro-Fuzzy Networks

Applied System Innovation
This study focuses on helicopter turboshaft engine innovative fault-tolerant fuzzy automatic control system development to enhance safety and efficiency in various flight modes.
Serhii Vladov, Oleksii Lytvynov, Victoria Vysotska, Viktor Vasylenko, Petro Pukach, Myroslava Vovk   +5 more
doaj   +1 more source

Improving rotorcraft survivability to RPG attack using inverse methods [PDF]

, 2009
This paper presents the results of a preliminary investigation of optimal threat evasion strategies for improving the survivability of rotorcraft under attack by rocket propelled grenades (RPGs).
Anderson, D., Thomson, D.G.
core   +1 more source