Results 71 to 80 of about 632,931 (350)

Digital Actuation Control of Soft Robotic Origami With Self‐Folding Liquid Crystal Elastomer Hinges

Advanced Functional Materials, EarlyView.
Self‐folding soft‐rigid hybrid robotic origami is enabled by liquid crystal elastomer actuators with embedded Joule heating and closed‐loop digital control. Digitally addressable hinges provide reversible and programmable transitions between distinct folded states while maintaining actuation performance at high cycle counts (over 1500).
David C. Bershadsky, Tuo Zhao, Glaucio H. Paulino, Emily C. Davidson   +3 more
wiley   +1 more source

Small Vessel with Inboard Engine Retrofitting Concepts; Real Boat Tests, Laboratory Hybrid Drive Tests and Theoretical Studies

Energies, 2020
The development of modern technologies and their increasing availability, as well as the falling costs of highly efficient propulsion systems and power sources, have resulted in electric or hybrid propulsions systems’ growing popularity for use on ...
Wojciech Leśniewski, Daniel Piątek, Konrad Marszałkowski, Wojciech Litwin   +3 more
doaj   +1 more source

An Approach for Utilizing Power Flow Modeling for Simulations of Hybrid Electric Propulsion Systems

2018 AIAA/IEEE Electric Aircraft Technologies Symposium (EATS), 2018
This paper describes an approach to creating simulations of the electric components for a hybrid electric propulsion system. The proposed modeling technique is based on power/load flow modeling and is designed to provide a modular framework that includes
Jeffryes W. Chapman, J. Litt
semanticscholar   +1 more source

Meta‐Rod Mechanical Metamaterials With Programmable Reconfiguration

Advanced Functional Materials, EarlyView.
Existing mechanical metamaterials achieve programmable large deformations in planar square or cubic configurations, restricted by required complex boundary conditions. This research proposes a 1D metamaterial, Meta‐rod, with linear, bending, twisting, area, and volume deformation modes.
Atharva Pande, Lyes Kadem, Hang Xu
wiley   +1 more source

From Food to Power: Hydrogel Thermoelectrics for Ingestible Electronics

Advanced Functional Materials, EarlyView.
We introduce a fully edible thermoelectric–electrochromic platform that harvests heat from food and converts it into a visible color change. N‐type and p‐type hydrogel thermoelectric generators connected in series power anthocyanin‐based electrochromic displays, demonstrating the feasibility of safe, biodegradable, ingestible systems for on‐food ...
Antonia Georgopoulou, Bokeon Kwak, Dario Floreano, Esther Amstad   +3 more
wiley   +1 more source

Recent Development of Aircraft Electric Propulsion System: A Technical Review

CES Transactions on Electrical Machines and Systems
The technology of electric propulsion aircraft (EPA) represents an important direction and an advanced stage in the development of aviation electrification.
Wei Chen, Yexin Yan, Yang Qi, Ming Huang, Weilin Li   +4 more
doaj   +1 more source

Electric Flight - Potential and Limitations [PDF]

, 2012
During the last years, the development of electric propulsion systems is pushed strongly, most notably for automotive applications. For ground based transportation, the system mass is relevant, but of relatively low importance.
Hepperle, Martin
core  

Quasi‐Static to Supersonic Energy Absorption of Nanoarchitected Tubulanes and Schwarzites

Advanced Functional Materials, EarlyView.
Nanoarchitected energy‐absorptive Tubulanes exhibit record energy absorption under quasi‐static conditions and exceptional inelastic energy dissipation under 750 m s−1 ballistics impact, with high performance spanning strain rates of 12 orders of magnitude.
Peter Serles, Alianna Maguire, Thomas Butruille, Jet Lem, Shuo Yang, Pedro Guerra Demingos, Sahar Choukir, Michel Haché, Boran Kumral, Katherine Jia, Charles Jia, Yu Zou, Chandra Veer Singh, Carlos M. Portela, Jun Lou, Pulickel M. Ajayan, Tobin Filleter   +16 more
wiley   +1 more source

Performance Characteristics of Turkey’s First 1,5 kW Hall Thruster Electric Propulsion System

Havacılık ve Uzay Teknolojileri Dergisi, 2020
Due to significant advantages and successful applications, electric propulsion has become a key technology for both scientific and commercial space missions.
Demet Ulusen, Banu Cicek Aydin, Yusuf Yurttas, Baris Cal, Andrii Tsybulnyk, Sergii Neugodnikov, Oleksii Cherkun, Seda Kayra Güllü   +7 more
doaj  

Electric propulsion for lunar exploration and lunar base development [PDF]

Using electric propulsion to deliver materials to lunar orbit for the development and construction of a lunar base was investigated. Because the mass of the base and its life-cycle resupply mass are large, high specific impulse propulsion systems may ...
Palaszewski, Bryan
core   +1 more source