Results 81 to 90 of about 1,422,313 (180)
Analysis influence of engine’s dynamic characteristics on helicopter’s flight quality
Xibei Gongye Daxue XuebaoThis article analyses the influence of an engine’s dynamic characteristics on a helicopter’s flight quality during hover/low speed forward flight. Firstly, based on the power matching relationship between the engine and the helicopter, a helicopter ...
WEI Yuan, CHEN Renliang
doaj +1 more source
A Cryopreservation‐Based Supply Chain Strategy for Extrusion Bioprinting in Space
Advanced Materials Technologies, EarlyView.Extrusion bioprinting on crewed space platforms requires a bioink that stays functional along the logistic chain. Here, cells and biomaterial ink travel separately, the cells cryopreserved and the ink cold stored, and are combined only minutes before printing.
Johannes Windisch +7 more
wiley +1 more source
TASK Quarterly, 2013 The paper presents the results of numerical simulations based on the URANS approach and the chimera overlapping grids technique of the main PZL W-3A “Sokół” (Falcon) helicopter rotor in forward flight conditions.
OSKAR SZULC +3 more
doaj
Analysis and Optimization of Hanging Stability of Heavy-Duty Coaxial Unmanned Helicopter
Applied SciencesThis study examines the hovering and forward-flight stability of a heavy-lift coaxial unmanned helicopter with a suspended payload. A six-degree-of-freedom dynamics model is developed, coupling the rotor, fuselage, and a rigid-body sling via a universal ...
Anan Xu +3 more
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Advanced Materials Technologies, EarlyView.Multilayer aerosol jet printed components with a low‐loss, thermally stable dielectric are demonstrated using benzocyclobutene. Ink formulation and in‐line droplet evaporation control support high‐quality, versatile, and stable printing performance. A specialized measurement for low‐loss materials reveals promising microwave properties, which, combined
Md Ramjan Ali +3 more
wiley +1 more source
On‐Chip Photonic Neural Network Architectures
Advanced Optical Materials, EarlyView.This review presents a comprehensive overview of on‐chip photonic neural network architectures, covering key photonic building blocks, representative network types, and emerging applications. Recent advances, implementation challenges, and future directions are examined, highlighting the potential of integrated photonics to enable ultrafast, energy ...
Seokjin Hong +7 more
wiley +1 more source
Nanjing Hangkong Hangtian Daxue XuebaoThe flapping wing of large bionic ornithopters （LBOs） has obvious flexible deformation during the flapping motion， which is difficult for aerodynamic analysis.
XU Hui +3 more
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Advanced Robotics Research, EarlyView.Amphiphilic chloroazobenzenes, bearing different amino acids as end groups alanine, phenylalanine, and valine, exhibit excellent photoisomerizations. Varying structures of three amino acid groups participate in supramolecular formations and therefore photoinduced morphological transformations via adjusting intermolecular interactions. These interaction
Shuangshuang Meng +3 more
wiley +1 more source
Flap-Lag-Torsion Stability In Forward Flight
, 1984 An aeroelastic stability of three-degree flap-lag-torsion blade in forward flight is examined. Ouasisteady aerodynamics with a dynamic inflow model is used.
Inderjit Chopra, Brahmananda Panda
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Nonlocomotory Robotic Strategies for Dynamic Rotation Control in Terrestrial Robots: A Review
Advanced Robotics Research, EarlyView.Terrestrial robots increasingly require rapid body rotation to maintain stability and agility in complex environments. This review shows nonlocomotory rotational control strategies that operate without ground contact, including reaction wheels, tails, bars, limbs, and thrusters.
Y. Liang +14 more
wiley +1 more source