Results 51 to 60 of about 847,370 (336)
Advanced Intelligent Systems, EarlyView.This review systematically analyzes deformable drones, including extendable, foldable, and tilting configurations, along with nature‐inspired flapping rotorcraft. By classifying deformation principles and structural mechanisms, design trade‐offs, functional capabilities, and future development potential are highlighted.
Ju‐Hee Lee +9 more
wiley +1 more source
MachinesThe 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 +3 more
doaj +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 +3 more
doaj +1 more source
Archaeological Prospection, EarlyView.ABSTRACT Saruq al‐Hadid, located at the edge of the Rub Al‐Khali desert near Dubai's southern border with Abu Dhabi, is among the region's richest archaeological sites. Renowned for its historical role in metallurgy, trade and human habitation, the site was occupied from the Umm an‐Nar period through the post–Iron Age. Despite its significance, much of
Moamen Ali +9 more
wiley +1 more source
Risk‐aware safe reinforcement learning for control of stochastic linear systems
Asian Journal of Control, EarlyView.Abstract This paper presents a risk‐aware safe reinforcement learning (RL) control design for stochastic discrete‐time linear systems. Rather than using a safety certifier to myopically intervene with the RL controller, a risk‐informed safe controller is also learned besides the RL controller, and the RL and safe controllers are combined together ...
Babak Esmaeili +2 more
wiley +1 more source
An Innovative Applied Control System of Helicopter Turboshaft Engines Based on Neuro-Fuzzy Networks
Applied System InnovationThis 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 +5 more
doaj +1 more source
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 +3 more
semanticscholar +1 more source
The Journal of Wildlife Management, EarlyView.We used an individual‐based movement method, supported by camera trap data, to assess changes in neonate caribou mortality patterns before and after wolf reduction began in the Itcha‐Ilgachuz mountain caribou subpopulation range, British Columbia, Canada.
Tazarve Gharajehdaghipour +2 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 +2 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