Results 41 to 50 of about 4,234 (146)

Modeling and System Identification of the muFly Micro Helicopter [PDF]

, 2018
An accurate mathematical model is indispensable for simulation and control of a micro helicopter. The nonlinear model in this work is based on the rigid body motion where all external forces and moments as well as the dynamics of the different hardware ...
Bermes, Christian, Bouabdallah, Samir, Schafroth, Dario, Siegwart, Roland   +3 more
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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

Applying rotorcraft modelling technology to renewable energy research [PDF]

, 2009
The perceived need to reduce mankind's impact on the global climate motivates towards a future society in which a significant proportion of its energy needs will be extracted from the winds and the tides of the planet.
Brown, R.E., Fletcher, Timothy M., Kelly, Mary E., Kim, Hyo Wan, Phillips, Catriona, Scheurich, Frank   +5 more
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Lymphatic‐Inspired and TENG‐Powered Soft Fiber Pumps for Soft Robots

SmartBot, Volume 1, Issue 4, December 2025.
A lymphatic‐inspired soft fiber pump (SFP) with parallel electrodes enhances durability under deformation. A 3D‐printed lost‐wax method enables customizable profiled fiber fabrication. Powered by a triboelectric nanogenerator (TENG), the SFP enables self‐sufficient fluid actuation in microfluidics, artificial muscles, and wearable thermal management ...
Pingan Zhu, Wei Tang, Xinyu Guo, Zhongdong Jiao, Qincheng Sheng, Yonghao Wang, Kecheng Qin, Huxiu Xu, Yiding Zhong, Huayong Yang, Jun Zou   +10 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

A High‐Precision Triboelectric Rotational Sensor for Enhanced Low‐Speed Monitoring via Magnetic Modulation in Smart Fitness Systems

SmartSys, Volume 1, Issue 4, December 2025.
ABSTRACT Real‐time detection of low‐speed motion and precise monitoring of low‐intensity exercise are crucial for smart fitness systems. These capabilities enable continuous data acquisition, capture subtle motion variations for personalized guidance, and enhance training effectiveness while reducing the risk of injury. However, conventional rotational
Xiaohui Lu, Hengyuan Xia, Liang Zhu, Zhaojie Zhang, Xiaosong Zhang, Yang Yu, Chaoyu Yang, Emad Uddin, Yamin Younis, Zheng Yang, Shaosong Li, Hengyu Li, Tinghai Cheng   +12 more
wiley   +1 more source

Design and Performance of Lift-Offset Rotorcraft for Short-Haul Missions [PDF]

, 2012
The design and performance of compound helicopters utilizing lift-offset rotors are examined, in the context of short-haul, medium-size civil and military missions.
Johnson, Wayne, Moodie, Alex M., Yeo, Hyeonsoo   +2 more
core   +1 more source

PSO‐Nonsingular Fast Terminal Sliding Mode Control for Hexarotor in Turbulent Atmospheric Boundary Layer With Disturbance Observer

International Journal of Robust and Nonlinear Control, Volume 35, Issue 17, Page 7309-7323, 25 November 2025.
ABSTRACT Hexacopter operations in the atmospheric boundary layer (ABL) are affected by gusty winds and turbulence, leading to collision risks or crashes. Stability of the hexacopter UAV in gusty winds is challenging in urban space. In this paper, non‐singular fast terminal sliding mode control (NFTSMC) is optimized using particle swarm optimization for
Muhammad Ilyas, Zhiguang Feng, Safeer Ullah, Jason J. R. Liu   +3 more
wiley   +1 more source

Aramid Nanofiber Aerogels: Versatile High Complexity Components for Multifunctional Composites

Advanced Materials, Volume 37, Issue 38, September 25, 2025.
Different forms of aramid nanofibers (ANFs) and especially aerogels from them, offer a sustainable route to high‐performance biomimetic nanocomposites. Due to the cartilage‐like architecture, ANF‐based materials enable breakthroughs in energy, electromagnetic, biomedical, and water purification technologies.
Mingqiang Wang, Shuhan Hu, Sangwok Bae, Volkan Cecen, Ahmet E. Emre, Zhengxiang Zhong, Li Liu, Carl Heltzel, Yudong Huang, Nicholas A. Kotov   +9 more
wiley   +1 more source

Vorticity-transport and unstructured RANS investigation of rotor-fuselage interactions [PDF]

, 2009
The prediction capabilities of unstructured primitive-variable and vorticity-transport-based Navier-Stokes solvers have been compared for rotorcraft-fuselage interaction.
Brown, Richard, Kenyon, Adam R., Shenoy, Rajiv, Smith, Marilyn J.   +3 more
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