Results 61 to 70 of about 107,600 (223)

Skeleton Enhanced Dispersed Lubricant Particle Based Triboelectric Nanogenerator for Droplet Energy Harvesting

open access: yesAdvanced Science, EarlyView.
A stretchable, slippery triboelectric nanogenerator (SS‐TENG) is presented for efficient droplet energy harvesting. A novel phase separation method is created to prepare a durable, flexible triboelectric layer with skeleton‐embedded, dispersed lubricant particles.
Changjun Yang   +7 more
wiley   +1 more source

Astronautics & Astronomy - a Profitable Partnership

open access: yesJournal of Aerospace Technology and Management, 2015
The connection between Astronautics and Astronomy is naturally straight forward. Astronomy is one of the oldest scientific areas along the human development, thousands of years.
Othon Cabo Winter
doaj  

Heat Transfer Analysis and Structural Optimization for Spiral Channel Regenerative Cooling Thrust Chamber

open access: yesInternational Journal of Aerospace Engineering, 2023
There is currently a lack of efficient heat transfer analysis methodologies for spiral channel regenerative cooling that has been increasingly applied in liquid rocket engines.
Junjie Lv   +3 more
doaj   +1 more source

Extension-twist coupled laminates for aero-elastic compliant blade design [PDF]

open access: yes, 2012
A definite list of laminate configurations with extension-twisting (and shearing-bending) coupling is derived for up to 21 plies of identical thickness.
York, C.B.
core   +1 more source

An Omnidirectional, High Power Density Magneto–Mechano–Electric Energy Harvester Using PNN–PZT Piezoceramic Operating in Decoupling Bending Mode

open access: yesAdvanced Energy and Sustainability Research, EarlyView.
Decoupling bending modes in magneto–mechano–electric energy harvesters, featuring two bending modes responding to different excitations with identical resonant frequencies, enables effective harvesting stray magnetic field energy in diverse environments.
Wei Peng   +7 more
wiley   +1 more source

Fault Detection and Isolation for Redundant Inertial Measurement Unit under Quantization

open access: yesApplied Sciences, 2018
Fault detection and isolation with redundant strapdown inertial measurement unit is critical for ensuring the reliability of the guidance or navigation system in the fields of both aeronautics and astronautics.
Tong Zhang, Fenfen Wang, Wenxing Fu
doaj   +1 more source

Wrinkling of Orthotropic Viscoelastic Membranes [PDF]

open access: yes, 2010
This paper presents a simplified simulation technique for orthotropic viscoelastic films. Wrinkling is detected by a combined stress-strain criterion and an iterative scheme searches for the wrinkle angle using a pseudo-elastic material stiffness ...
Deng, X., Pellegrino, S.
core   +1 more source

Spring and Power in Hovering Ornithopters

open access: yesAdvanced Intelligent Systems, EarlyView.
Only small ornithopters can hover, longest at the hummingbird size. This article reviews the drive and power of these hovering machines, focusing on elastic energy and thrust boosters. Unlike two‐winged designs, X‐winged and multiple‐V‐winged ornithopters benefit from lower disk loading and slower, smaller wingbeats, and the clap‐and‐fling effect ...
Gih‐Keong Lau   +4 more
wiley   +1 more source

Theoretical analysis of perching and hovering maneuvers [PDF]

open access: yes, 2013
Unsteady aerodynamic phenomena are encountered in a large number of modern aerospace and non-aerospace applications. Leading edge vortices (LEVs) are of particular interest because of their large impact on the forces and performance.
Beddoes   +15 more
core   +1 more source

Gecko‐Inspired Adhesive Grasping from Convex to Flat Surfaces with Contact Sensing

open access: yesAdvanced Intelligent Systems, EarlyView.
A gecko‐inspired adhesive gripper with a pair of soft hierarchical bio‐toes and a bionic rolling module is designed for adaptive grasping from convex to flat surfaces. Integrated adhesive contact sensing enables the smart grabbing of complex items. The gripper exhibits adaptability, load‐bearing capacity, and potential for applications in industries ...
Liuwei Wang   +6 more
wiley   +1 more source

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