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4 results on '"Song, Wenchao"'

1. Edge filter temperature demodulation system based onarrayed wave-guide grating

Author

Song Wenchao, Li Hongqiang, Mao Quanhua, Wang Runjie, Zhang Meiling, Li Enbang, Zhang Sai, Juan Daniel Prades Garcia, and Gao Qian

Subjects
Materials science, Optics, Temperature sensing, business.industry, Demodulation, Grating, Edge filter, business, Atomic and Molecular Physics, and Optics
Published
2021

2. Steady-state dynamic method: an efficient and effective way to predict dynamic modulus of asphalt concrete

Author

Cao, Peng, Jin, Feng, Zhou, Changjun, Feng, Decheng, and Song, Wenchao

Subjects
Asphalt -- Analysis -- Mechanical properties, Concrete -- Analysis -- Mechanical properties, Business, Construction and materials industries
Abstract

ABSTRACT This study presents two meso-mechanical methods of analyzing the asphalt concrete's dynamic modulus, including the transient dynamic method (implicit dynamic method) based on the modified Newmark numerical differential algorithm [...]

Published
2016
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3. Small-signal model-based control strategy for balancing individual DC capacitor voltages in cascade multilevel inverter-based STATCOM

Author

Liu, Yu, Huang, Alex Q., Song, Wenchao, Bhattacharya, Subhashish, and Tan, Guojun

Subjects
Capacitors -- Design and construction, Electric current converters -- Design and construction, Voltage -- Control, Voltage -- Measurement, Industrial electronics -- Research, Electric current converter, Business, Computers, Electronics, Electronics and electrical industries
Abstract

This paper presents a new feedback control strategy for balancing individual dc capacitor voltages in a three-phase cascade multilevel inverter-based static synchronous compensator. The design of the control strategy is based on the detailed small-signal model. The key part of the proposed controller is a compensator to cancel the variation parts in the model. The controller can balance individual dc capacitor voltages when H-bridges run with different switching patterns and have parameter variations. It has two advantages: 1) the controller can work well in all operation modes (the capacitive mode, the inductive mode, and the standby mode) and 2) the impact of the individual dc voltage controller on the voltage quality is small. Simulation results and experimental results verify the performance of the controller. Index Terms--Multilevel converters, reactive power, static synchronous compensator (STATCOM), voltage balancing.

Published
2009

4. Design of a smooth-walled horn for satellite communication in c-band

Author

Liang Ruixiang, Zhang Zhenhua, Song Wenchao, Wang Hu, and Gong Qi

Subjects
Physics, Optics, business.industry, C band, Cross polarization, Bandwidth (signal processing), Communications satellite, Antenna radiation, business
Abstract

Corrugated horn is often preferred due to having low cross polarization over a very wide bandwidth in C-band satellite communication, but the corrugated horn is challenging to fabricate and weight. Therefore, a novel smooth-walled horn is proposed in this paper. The horn has low cross-polarization (

Published
2017

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