Results 41 to 50 of about 485,912 (124)

Study on Vibration Reduction Technology of Coaxial Rigid Rotor Based on High‑Order Harmonic Control

Nanjing Hangkong Hangtian Daxue Xuebao
Aiming at the issue of large vibration loads during high-speed forward flight of coaxial helicopters， the implementation of high-order harmonic control（HHC） on the coaxial rotors system is considered for active vibration suppression control.
WEI Wulei, YU Zhihao, FAN Feng, ZHAO Jinrui   +3 more
doaj   +1 more source

Design Challenges to Expand the Functionality of Drones: Deformable Rotorcraft and Nature‐Inspired Flapping Drones

Advanced Intelligent Systems, Volume 8, Issue 3, March 2026.
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, Sumin Jung, Jinwoo Jang, Yeji Han, Minchae Kang, Jihun Seong, Suyeon Seo, Eunsol Park, Haesol Kwak, Min‐Woo Han   +9 more
wiley   +1 more source

Ions as Architects of DNA Nanostructures: Mechanisms, Simulations, and Technological Frontiers

Small Structures, Volume 7, Issue 3, March 2026.
Ions are not merely passive electrolytes but active regulators of DNA nanostructures. This review shows how ion valence, hydration, and specificity govern electrostatic screening, correlation, and confinement, enabling DNA origami, metallized DNA, nanopores, hydrogels, DNAzymes, molecular machines, and energy devices through integrated experimental and
Sergiy Perepelytsya, Dmytro Piatnytskyi, Tetiana Bubon, Narcis Cibotariu, Aatto Laaksonen, Francesca Mocci   +5 more
wiley   +1 more source

Design and Analysis of a 6‐Speed Coaxial Magnetic Gearbox With Axial Gear Shifting Mechanism for Automotive Applications

IET Electric Power Applications, Volume 20, Issue 1, January/December 2026.
This paper proposes a multi‐stage magnetic gearbox (MSMG) designed for automotive applications. The proposed architecture provides six distinct gear ratios within an integrated system. By effectively suppressing eddy current losses through adaptive segmentation, this design ensures robust performance for high‐power propulsion systems.
Ali Hosseini‐Fard, Seyed Hamid Shahalami, Esmaeil Fallah Choolabi   +2 more
wiley   +1 more source

Dynamics Analysis of Flexible Rotors in Ground‐Based Test Platform for Large‐Capacity Offshore Wind Turbines

IET Renewable Power Generation, Volume 20, Issue 1, January/December 2026.
This study develops a system‐level dynamic model for ultra‐long low‐speed rotors of 22 MW offshore wind turbine test platforms, based on Timoshenko beam theory and multi‐bearing support coupling. The model is validated against ANSYS results, with frequency errors <3.1% for key modes, enabling accurate prediction of natural frequencies, critical speeds,
Yang Xue, Shiyao Qin, Chen Qi, Cong Liu, Ning Wang, Wenliang Zhao   +5 more
wiley   +1 more source

Helicopter tail rotor thrust and main rotor wake coupling in crosswind flight [PDF]

, 2010
The tail rotor of a helicopter with a single main rotor configuration can experience a significant reduction in thrust when the aircraft operates in crosswind flight. Brown’s vorticity transport model has been used to simulate a main rotor and tail rotor
Fletcher, Timothy M., Brown, Richard
core   +4 more sources

An Analytical Approach for Fast Prediction of Stator Natural Frequencies in a Conical Permanent Magnet Synchronous Motor

The Journal of Engineering, Volume 2026, Issue 1, January/December 2026.
This study proposes an analytical method to predict stator core vibrations. This analytical framework provides an efficient theoretical tool for rapid vibration assessment and design optimisation of conical motor stators. ABSTRACT Conical permanent magnet synchronous motor (CPMSM) is widely used in turbine power generation, electric vehicle propulsion ...
Zhong Huang, Hao Zhang, Peng Zhang
wiley   +1 more source

Field Monitoring Study on Load‐Bearing Performance of Adjustable Pile‐Supported Wind Turbine Foundation in Open‐Pit Mine Dump Sites

Advances in Civil Engineering, Volume 2026, Issue 1, 2026.
To investigate the operational stress response and load‐transfer mechanisms of adjustable pile‐supported wind turbine foundation in open‐pit mine dump environments, a site‐specific monitoring scheme was developed for open‐pit mine dump environments, incorporating structural features of the foundation system.
Jin Xu, Fanhua Wang, Huibo Fan, Bin Liang, Gang Lu, Deping Wang, Jinkui Shi, Huanwei Wei, Fang Tan, Mustafa Zeybek   +9 more
wiley   +1 more source

Aerodynamic loading on sharp and blunt trailing-edged rotor blades at high advance ratio

Advances in Aerodynamics
Reverse flow on the retreating side of a rotor disk is an intrinsic aerodynamic limitation of high-speed, high advance ratio rotorcraft. For traditional single main rotor helicopters, the influence of flow reversal is not significant, but it is important
Oliver D. Wild, Matthew J. Murphy, Anya R. Jones   +2 more
doaj   +1 more source

High Performance Compatibilized Polyamide Composites Containing Graphene Nanoplatelets and Recycled Glass Fibers

Polymer Composites, Volume 46, Issue 18, Page 17402-17417, 20 December 2025.
Polyamide/graphene nanoplatelet composites for functional applications ABSTRACT Polyamide‐based composites reinforced with graphene nanoplatelets (GNPs) have exceptional potential as high‐performance functional materials. Non‐covalent modification with a trimellitic anhydride (TMA) coating agent improved the compatibility of the GNPs with polyamide 6 ...
Haritha Haridas, Mohamed Wahbi, Aditya Singh, Mehdi Babazadeh, Carlos E. Saavedra, Osayuki Osazuwa, Marianna Kontopoulou   +6 more
wiley   +1 more source