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Research on the aerodynamic characteristics of eVTOL aircraft ducted rotor tip embedded inside the ducted body [PDF]
Scientific ReportsThe lift system constitutes a pivotal technology in the makeup of vertical takeoff and landing aircraft systems. The application of ducted rotors in urban air mobility(UAM) has advantages and is one of the future development trends.
Siliang Du +4 more
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Mutual Aerodynamic Interference Mechanism Analysis of an “X” Configuration Quadcopter
Aerospace, 2021 This paper studies the quadcopter’s mutual interference phenomenon. The flow field of the quadcopter at different flight speeds is simulated by solving the three-dimensional unsteady Reynolds averaged Navier-Stokes equations with sliding mesh methods ...
Jianchuan Ye, Jiang Wang, Peijian Lv
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Splitting of Waves in Rotor-in-Rotor Nonlocal Metamaterials by Internal Rotor Coupling
SSRN Electronic Journal, 2022 Mechanical metamaterials can be used to control wave propagation because they are flexibly adjustable. In this paper, a one-dimensional rotor-in-rotor metamaterial with internal rotor coupling is proposed. This metamaterial introduces a new connection between lattices into a rotor-in-rotor system to produce a nonlocal metamaterial.
Leiyu Yang +3 more
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Journal of the American Heart Association: Cardiovascular and Cerebrovascular Disease, 2021 Background Activation during onset of atrial fibrillation is poorly understood. We aimed at developing a panoramic optical mapping system for the atria and test the hypothesis that sequential rotors underlie acceleration of atrial fibrillation during ...
Óscar Salvador‐Montañés +11 more
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Frontiers in Physiology, 2023 Pulmonary vein isolation (PVI) is the most successful treatment for atrial fibrillation (AF) nowadays. However, not all AF patients benefit from PVI.
Carlos Fambuena-Santos +6 more
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Frontiers in Physiology, 2022 Purpose: Several studies have emphasised the significance of high dominant frequency (HDF) and rotors in the perpetuation of AF. However, the co-localisation relationship between both attributes is not completely understood yet.
Mahmoud Ehnesh +13 more
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Physical Review Letters, 2021 A probability density function describing the angular evolution of a fixed-length atom-atom vector as a Lévy rotor is derived containing just two dynamical parameters: the Lévy parameter $α$ and a rotational time constant $τ$. A Lévy parameter $α\!
Faux, David A. +2 more
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Fault tolerant control of a three‐phase PMSM by limiting the heat of an inter‐turn fault
IET Electric Power Applications, 2022 Inter‐turn faults are most commonly the initial stator winding fault in power trains with Voltage Source Inverters. Without counteractions, these faults can propagate and cause catastrophic failures in safety critical applications like all‐electric ...
Simon Foitzik, Martin Doppelbauer
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Frontiers in Physiology, 2021 BackgroundThere is debate whether human atrial fibrillation is driven by focal drivers or multiwavelet reentry. We propose that the changing activation sequences surrounding a focal driver can at times self-sustain in the absence of that driver. Further,
Richard T. Carrick +5 more
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Sensors, 2020 Crack localization in running rotors is very important and full of challenges for machinery operation and maintenance. Characteristic deflection shapes or their derivatives based methods seem to be promising for crack localization in rotors.
Zhiwen Lu +3 more
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