Results 61 to 70 of about 30,307 (306)

Main rotor-tail rotor intraction and its implications for helicopter directional control

, 2008
Aerodynamic interference between the main and tail rotor can have a strong negative influence on the flight mechanics of a conventional helicopter. Significant unsteadiness in the tail rotor loading is encountered under certain flight conditions, but the
Fletcher, Timothy M., Brown, R.E., Fletcher, T.M.   +2 more
core   +1 more source

Fully 3D‐Printed Wave‐Wound Electromagnetic Motors

Advanced Materials Technologies, EarlyView.
This work presents the first fully 3D‐printed wave‐wound electromagnetic motors, which are created using conductive nanoparticle inks, carbon‐filled nylon polymers, and surface mount components. These motors can achieve a stall torque of 7.62N·mmA−1$7.62 \nobreakspace N{\cdot }mm A^{-1}$ and efficiency of 28.2 %, which approaches the performance of ...
Joseph Schwalbe, Sebastian Mettes, Eduardo Francke, Kenneth W. Allen, Yi Chen Mazumdar   +4 more
wiley   +1 more source

Water Tank Experiments on Stratified Flow over Double Mountain-Shaped Obstacles at High-Reynolds Number

Atmosphere, 2017
In this article, we present an overview of the HyIV-CNRS-SecORo (Hydralab IV-CNRS-Secondary Orography and Rotors Experiments) laboratory experiments carried out in the CNRM (Centre National de Recherches Météorologiques) large stratified water flume. The
Ivana Stiperski, Stefano Serafin, Alexandre Paci, Hálfdán Ágústsson, Anne Belleudy, Radiance Calmer, Kristian Horvath, Christoph Knigge, Johannes Sachsperger, Lukas Strauss, Vanda Grubišić   +10 more
doaj   +1 more source

Collision‐Resilient Winged Drones Enabled by Tensegrity Structures

Advanced Robotics Research, EarlyView.
Based on structures of birds such as the woodpeck, this article presents the collision‐resilient aerial robot, SWIFT. SWIFT leverages tensegrity structures in the fuselage and wings which allow it to undergo large deformations in a crash, without sustaining damage. Experiments show that SWIFT can reduce impact forces by 70% over conventional structures.
Omar Aloui, Raphael Zufferey, William Stewart, Mohammad Askari, Simon Jeger, Dario Floreano   +5 more
wiley   +1 more source

Causal Scale of Rotors in a Cardiac System

Frontiers in Physics, 2018
Rotors of spiral waves are thought to be one of the potential mechanisms that maintain atrial fibrillation (AF). However, disappointing clinical outcomes of rotor mapping and ablation to eliminate AF raise a serious doubt on rotors as a macro-scale ...
Hiroshi Ashikaga, Hiroshi Ashikaga, Francisco Prieto-Castrillo, Francisco Prieto-Castrillo, Francisco Prieto-Castrillo, Mari Kawakatsu, Nima Dehghani, Nima Dehghani   +7 more
doaj   +1 more source

Probing supramolecular protein assembly using covalently attached fluorescent molecular rotors

, 2017
Changes in microscopic viscosity and macromolecular crowding accompany the transition of proteins from their monomeric forms into highly organised fibrillar states.
Ismael López-Duarte, Eleanor Stride, Bull, JA, James A Bull (8896361), Kubánková, Markéta, Marie de Saint Victor (16246910), Victor, Marie de Saint, Vadukul, Devkee M., Devkee M. Vadukul, Louise C. Serpell, Markéta Kubánková (9697247), López Duarte, Ismael, López-Duarte, I, Marina K. Kuimova, de Saint Victor, Marie, Vadukul, DM, Kubánková, M, Markéta Kubánková, Devkee M Vadukul (16228982), Serpell, LC, Stride, E, Kuimova, MK, Stride, Eleanor, James A. Bull, Serpell, Louise C., Marie de Saint Victor, Louise Serpell (4461124), Bull, James A., Ismael López-Duarte (2450035), Kuimova, Marina K., de Saint Victor, M, Eleanor Stride (2039383), Marina K Kuimova (16246913)   +32 more
core   +1 more source

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, J. An, X. Zheng, D. Wang, S. Wang, X. Wang, P. Zhu, J. Pei, S. Li, J. Paripurana, Y. Han, Z. Tang, X. Gan, Q. He, X. Ma   +14 more
wiley   +1 more source

Design methodology for a special single winding based bearingless switched reluctance motor

The Journal of Engineering, 2017
Bearingless switched reluctance motors (BSRMs) have both magnetic bearing as well as conventional motor characteristics which make them suitable for diverse industrial applications.
Madhurjya Dev Choudhury, Firdausa Ahmed, Gaurav Kumar, Karuna Kalita, Kari Tammi, Kari Tammi   +5 more
doaj   +1 more source

Neutral metallacyclic rotors [PDF]

Chemical Communications, 2009
A prototype of a neutral Re-based metallacyclic rotor, assembled in a one-step process, possesses a para-phenylene rotor that rotates in solution with respect to the stator.
Sathiyendiran, Malaichamy, Wu, Jing-Yun, Velayudham, Murugesan, Lee, Gene-Hsiang, Peng, Shie-Ming, Lu, Kuang-Lieh   +5 more
openaire   +3 more sources

Degradable Magnetic Composites from Recycled NdFeB Magnets for Soft Actuation and Sensing

Advanced Robotics Research, EarlyView.
This work presents a degradable soft magnetic composite made from recycled NdFeB particles embedded in a gelatin‐based organogel. The material is processed into magnetic sensors and soft robotic components, which can later be dissolved in a green solvent to recover NdFeB magnetic particles.
Muhammad Bilal Khan, Lin Guo, Kilian Schäfer, Eduardo Sergio Oliveros‐Mata, Xiaotao Wang, Florian Hofmann, Matthias Lutzi, Mark Suppelt, Proloy Taran Das, Jan Schmidtpeter, Imants Dirba, Stephan Rinderknecht, Mario Kupnik, Denys Makarov, Oliver Gutfleisch   +14 more
wiley   +1 more source