Results 1 to 10 of about 226,837 (207)

Novel Flexible Excitation System Based on MultilevelTopology Technology

Zhongguo dianli, 2019
Based on the development trend of the next generation power system, a novel flexible excitation system is designed based on three-level voltage source converter, and a matching five-level DC chopping circuit is proposed.
Kuayu WU, Jiancheng ZHANG, Long WU, Bing HAN, Le FANG, Cencen LU, Hongtao XIONG   +6 more
doaj   +2 more sources

Influence of temperature on characteristics properties of flexible coupling [PDF]

Transport Problems, 2012
The presented article deals with issue of characteristics changes of flexible shaft couplings used in drive systems of transport devices (dynamic torsional stiffness and damping coefficient) which is caused by influence of increase or decrease of ...
Jaroslav HOMIŠIN, Peter KAŠŠAY
doaj   +2 more sources

Research on flexible excitation system applied to improve transient stability characteristics of the receiving-end power grid

Zhejiang dianli, 2022
The transient forced excitation of the traditional excitation system used for synchronous condenser is limited and unmaintainable. A flexible excitation system can improve the crest value of transient forced excitation and maintain the forced excitation ...
WANG Longfei, ZHANG Jiancheng, WANG Bowen, ZHUO Guying, HUA Wen, XIONG Hongtao   +5 more
doaj   +1 more source

Experimental Research on Vortex-Induced Force Characteristics of Flexible Riser with Buoyancy Module and Strakes

Applied Sciences, 2022
In this paper, the vortex-induced force characteristics of a flexible riser with buoyancy modules and strakes were experimentally investigated. The strain information caused by vortex-induced vibration (VIV) at different cross-sections on the flexible ...
Lusheng Jia, Yi Liu, Mengmeng Zhang, Shixiao Fu, Haojie Ren   +4 more
doaj   +1 more source

Modal Identification of Ultralow-Frequency Flexible Structures Based on Digital Image Correlation Method

Applied Sciences, 2021
Traditional modal testing has difficulty accurately identifying the ultralow-frequency modes of flexible structures. Ultralow-frequency excitation and vibration signal acquisition are two main obstacles.
Hui Qian, Yimeng Wu, Rui Zhu, Dahai Zhang, Dong Jiang   +4 more
doaj   +1 more source

Low power laser generated ultrasound : signal processing for time domain data acquisition [PDF]

, 2001
The use of low power modulated laser diode systems has previously been established as a suitable method for non-destructive laser generation of ultrasound.
Cleary, A., Veres, Istvan, Thursby, G.J., McKee, C., Armstrong, I., Pierce, S.G., Culshaw, B.   +6 more
core   +4 more sources

Reciprocating excitation of a flexible beam: Benchmark study [PDF]

Mechanism and Machine Theory, 2006
Abstract A long and slender flexible beam is set in oscillatory motion to observe its deflection. A novel application of digital image processing is employed to obtain contactless discrete measurements of the beam tip deflection. We compare the measured data to those predicted by a flexible multibody dynamics simulation ( flxdyn ).
R.G. Langlois, M.J.D. Hayes
openaire   +1 more source

Online Frequency Estimation on a Building-like Structure Using a Nonlinear Flexible Dynamic Vibration Absorber

Mathematics, 2022
The online frequency estimation of forced harmonic vibrations on a building-like structure, using a nonlinear flexible vibration absorber in a cantilever beam configuration, is addressed in this article.
Francisco Beltran-Carbajal, Hugo Francisco Abundis-Fong, Luis Gerardo Trujillo-Franco, Hugo Yañez-Badillo, Antonio Favela-Contreras, Eduardo Campos-Mercado   +5 more
doaj   +1 more source

A Coordinated Optimal Strategy for Voltage and Reactive Power Control with Adaptive Amplitude Limiter Based on Flexible Excitation System

Energies, 2021
The flexible excitation system (FES) is a kind of novel excitation system with two channels for damping control. Besides the basic functions of traditional excitation systems, flexible excitation systems can provide reactive power support for the ...
Yuwei Peng, Jiancheng Zhang, Chengxiong Mao, Hongtao Xiong, Tiantian Zhang, Dan Wang   +5 more
doaj   +1 more source

Efficient excitation and tuning of toroidal dipoles within individual homogenous nanoparticles [PDF]

, 2015
We revisit the fundamental topic of light scattering by single homogenous nanoparticles from the new perspective of excitation and manipulation of toroidal dipoles. It is revealed that besides within all-dielectric particles, toroidal dipoles can also be
Hu, Haojun, Lei, Bing, Liu, Wei, Miroshnichenko, Andrey E., Shi, Jianhua   +4 more
core   +2 more sources