Results 71 to 80 of about 4,974,132 (289)

Liquid Crystal Elastomer Actuator Matrix for Large Area Applications

Advanced Materials Technologies, EarlyView.
A scalable approach is used to manufacture a digitally‐controllable, 2D 5 × 5 actuator matrix. The elements of the matrix are produced by direct ink writing of a liquid crystal elastomer ‘artificial muscle’ on large‐area flexible thin‐film heaters. In optimizing the low‐power actuators, multiple heater designs and substrate materials are investigated ...
Giulia Spallanzani, Bart Peeters, Danqing Liu, Peter Zalar, Hylke B. Akkerman, Jeroen A. H. P. Sol   +5 more
wiley   +1 more source

The impact of wind generators on a Powe system's transient stability [PDF]

, 2009
This thesis discusses the investigations carried out on the different types of wind generators and how these would affect the transient stability of a hypothetical power network as presented in this report.
Khomari, Moloantoa
core   +1 more source

High frequency resonance characteristics analysis of voltage‐source virtual synchronous generator and suppression strategy

IET Electric Power Applications
The voltage‐source virtual synchronous generator is a grid‐forming type power electronic control technology and is able to support converters that have the ability of inertial, primary frequency and voltage regulation.
Zhi Li, Mingbo Liu, Yu Gong, Xudong Li
doaj   +1 more source

Control strategy of virtual synchronous generator based on virtual impedance and band-pass damping

, 2016
This paper introduces a new control strategy to realize a virtual synchronous generator. The proposed control strategy is based on virtual impedance and band-pass damping algorithms to achieve the electro-mechanical characteristics of synchronous ...
Y. Huo, L. Piegari, Niu, R., R. Niu, S. Barcellona, BARCELLONA, SIMONE, PIEGARI, LUIGI, HUO, YUJIA, RAGAINI, ENRICO, E. Ragaini   +9 more
core   +1 more source

Observations of expert communicators in immersive virtual worlds: implications for synchronous discussion [PDF]

, 2008
With the increased interest in using Immersive Virtual Worlds (IVWs) such as Second Life to augment and amplify teaching or to develop communities of practice, the author engaged graduate students, all current K‐12 teachers, in a qualitative study to ...
McVey, Michael, Michael Hamilton McVey
core   +1 more source

Information Transmission Strategies for Self‐Organized Robotic Aggregation

Advanced Robotics Research, EarlyView.
In this review, we discuss how information transmission influences the neighbor‐based self‐organized aggregation of swarm robots. We focus specifically on local interactions regarding information transfer and categorize previous studies based on the functions of the information exchanged.
Shu Leng, Zihan Li, Yifeng Shao, Jinhao Liu, Li Yu, Shuguang Li   +5 more
wiley   +1 more source

Modelling, Implementation, and Assessment of Virtual Synchronous Generator in Power Systems

Journal of Modern Power Systems and Clean Energy, 2020
As more and more power electronic based generation units are integrated into power systems, the stable operation of power systems has been challenged due to the lack of system inertia. In order to solve this issue, the virtual synchronous generator (VSG),
Meng Chen, Dao Zhou, Frede Blaabjerg
doaj   +1 more source

Renewable Energy System on Frequency Stability Control Strategy Using Virtual Synchronous Generator

, 2020
This study constructs a novel virtual synchronous generator system based on a transfer function, and optimizes the parameters of the model by using the improved whale algorithm to improve the frequency control ability of virtual synchronous generator ...
Huan Feng, Lingling Li, Anthony S. F. Chiu, Hengyi Li, Ming-Lang Tseng   +4 more
core   +1 more source

Simple Tuning Method of Virtual Synchronous Generators Reactive Control [PDF]

, 2020
The integration of renewable energy sources requires new control strategies to make static converters able to provide ancillary grid services, such as virtual inertia and grid support during faults.
Armando, Eric, Radu Bojoi, Mandrile, Fabio, Bojoi, Radu, Carpaneto, Enrico, Eric Armando, Fabio Mandrile, Enrico Carpaneto   +7 more
core   +1 more source

Tumbling Magnetic Microrobots for Targeted In Vivo Drug Delivery in the GI Tract

Advanced Robotics Research, EarlyView.
We introduce a microrobot design and integrated system for on‐demand targeted drug release in the gastrointestinal tract. The microrobot has an embedded magnet for actuation with external magnetic fields and is visualized in real time using ultrasound. It has two drug release ports sealed with a thermally sensitive wax. Local heating of the wax using a
Aaron C. Davis, Luis Carlos Sanjuan Acosta, Shubh P. Mehta, Baiyan Qi, Yang Yang, Luis Solorio, Craig J. Goergen, David J. Cappelleri   +7 more
wiley   +1 more source