Results 41 to 50 of about 285,442 (311)

Numerical Study on Tandem-Rotor Autorotation in Forward Flight

Aerospace, 2022
This work presents a systematic approach to analyzing the aerodynamic characteristics of tandem rotor forward autorotation considering rotor-to-rotor interference.
Jiayu Wen, Yanguo Song, Huanjin Wang, Dong Han   +3 more
doaj   +1 more source

A Comparative Study on Primary Bearing Rating Life of a 5-MW Two-Blade Wind Turbine System Based on Two Different Control Domains

Energies, 2019
Recently, the importance of individual pitch control (IPC) capability in wind turbine systems has been emphasized to achieve the desired power performance and mitigate the aerodynamic imbalance load for the mechanical integrity.
Bon-Yong Koo, Dae-Yi Jung
doaj   +1 more source

Aerodynamic Interference on Trim Characteristics of Quad-Tiltrotor Aircraft

Aerospace, 2022
The aerodynamic interference between the different components of quad-tiltrotor (QTR) aircraft were considered to analyze its influence on trim characteristics.
Pan Zhou, Renliang Chen, Ye Yuan, Cheng Chi   +3 more
doaj   +1 more source

Characterization of Defect Distribution in an Additively Manufactured AlSi10Mg as a Function of Processing Parameters and Correlations with Extreme Value Statistics

Advanced Engineering Materials, EarlyView.
Predicting extreme defects in additive manufacturing remains a key challenge limiting its structural reliability. This study proposes a statistical framework that integrates Extreme Value Theory with advanced process indicators to explore defect–process relationships and improve the estimation of critical defect sizes. The approach provides a basis for
Muhammad Muteeb Butt, Varma Kvvssn, Hossein Laieghi, Zia Uddin, Peyman Ansari, E. Kıvanç Sadak, Can Barış Toprak, Hüseyin Kızıl, Enrico Salvati   +8 more
wiley   +1 more source

Swashplate control system [PDF]

, 1987
A mechanical system to control the position of a rotating swashplate is developed. This system provides independent lateral cyclic, longitudinal cyclic and collective pitch control of a helicopter rotor attached to the swashplate, without use of a mixer ...
Laub, Georgene H., Morse, H. Andrew, Peyran, Richard J.   +2 more
core   +1 more source

Numerical Investigation of Noise Generation from a Variable-Pitch Propeller at Various Flight Conditions

Fluids
The advent of electric propulsion for new aircraft designs necessitates the optimization of propeller aerodynamic performance and the reduction of acoustic signatures.
Mateus Grassano Lattari, Victor Henrique Pereira da Rosa, Filipe Dutra da Silva, César José Deschamps   +3 more
doaj   +1 more source

Iterative feedback tuning of wind turbine controllers [PDF]

Wind Energy Science, 2017
Traditionally, wind turbine controllers are designed using first principles or linearized or identified models. The aim of this paper is to show that with an automated, online, and model-free tuning strategy, wind turbine control performance can be ...
E. van Solingen, S. P. Mulders, J.-W. van Wingerden   +2 more
doaj   +1 more source

2D Magnetic and Topological Quantum Materials and Devices for Ultralow Power Spintronics

Advanced Functional Materials, EarlyView.
2D magnets and topological quantum materials enable ultralow‐power spintronics by combining robust magnetic order with symmetry‐protected, Berry‐curvature‐driven transport. Fundamentals of 2D anisotropy and spin‐orbit‐coupling induced band inversion are linked to scalable growth and vdW stacking.
Brahmdutta Dixit, Yifei Yang, Shawn Li, Yu‐Chia Chen, Qi Jia, Jian‐Ping Wang   +5 more
wiley   +1 more source

Artifact‐Minimizing Ultrathin Transparent Electrodes Fabricated via iCVD for In Vivo Optogenetic Stimulation and Neural Signal Monitoring of Primary Visual Cortex

Advanced Functional Materials, EarlyView.
We present ultrathin flexible transparent electrodes through iCVD‐enabled molecular control of 10 nm gold films on poly(dimethylaminomethylstyrene). In vivo validation demonstrated photoelectric artifact reduction vs. opaque electrodes and preservation of natural neural dynamics.
Tae Jin Mun, Minju Kim, Chaesung Kim, Yunyoung Choi, In‐Yeop Baek, Younghak Cho, Gyeongyong Lee, Yerim Jang, Min‐Ho Nam, Wonryung Lee, Maesoon Im, Hyejeong Seong   +11 more
wiley   +1 more source

Review of the Intelligent Frameworks for Pitch Angle Control in Wind Turbines

IEEE Access
Among the renewable energy sources, wind energy plays a crucial role in meeting the increasing global demand for clean energy. The variability in energy production makes wind turbines produce intermittent and varying power resources, variable mechanical ...
Abdulbasit Hassan, Ghali Ahmad, Md Shafiullah, Asif Islam, Md Shafiul Alam   +4 more
doaj   +1 more source