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Kun Mao, Wuxing Jing, Meihong Zhang and Huining Zhang
This paper investigates a novel correction technique for the unsteady subsonic wing?body interference model. The correction technique considers the unsteady forces on the lifting boxes and the body elements of an idealized aircraft model. The chosen simu...
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João Miguel Silva, Marco António Oliveira, André Ferraz Saraiva and Aníbal J. S. Ferreira
The estimation of the frequency of sinusoids has been the object of intense research for more than 40 years. Its importance in classical fields such as telecommunications, instrumentation, and medicine has been extended to numerous specific signal proces...
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Azharul Karim, M. Masum Billah, M. T. Talukder Newton and M. Mustafizur Rahman
A numerical study of the unsteady mixed convection heat transfer characteristics of an Ag?water nanofluid confined within a square shape lid-driven cavity has been carried out. The Galerkin weighted residual of the finite element method has been employed...
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?ydrunas Kavaliauskas and Igor ?ajev
In the industrial and sales processes, dosing systems of various constructions, whose operation is based on mechanical vibrations (vibratory feeders), are very often used. These systems face many problems, such as resonant frequency, flow instability of ...
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Minglong Cheng, Guoqing Jia, Weidong Fang, Huiyue Yi and Wuxiong Zhang
Frequency estimation of a sinusoidal signal is a fundamental problem in signal processing for the Internet of Things. The frequency interpolation estimation algorithm based on the fast Fourier transform is susceptible to being disturbed by noise, which l...
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Pengcheng Gao, Qiaogao Huang and Guang Pan
A numerical simulation is used to investigate the effects of adding high frequency and low amplitude perturbations of different waveforms to the sinusoidal-based signal of the heaving foil on the propulsion performance and wake structure. We use the adju...
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Yuanjian Han, Hailong Wu, Jiegang Peng and Bin Ou
Biologists have discovered a kind of weakly electric fish that identifies its prey by using active electrolocation in virtual darkness. In this study, we built an underwater active electrolocation system platform designed to investigate the biological me...
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Alexandr Shavelkin,Jasim Mohmed Jasim Jasim,Iryna Shvedchykova
Pág. 14 - 22
Improvement of the current control loop of the multifunctional grid-tied inverter of the local object electrical power system is considered. The purpose is ensuring compliance with the quality standards of the grid current in the whole range of its value...
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Oleksandr Plakhtii,Volodymyr Nerubatskyi,Dmytro Sushko,Igor Ryshchenko,Vladyslav Tsybulnyk,Denys Hordiienko
Pág. 6 - 14
In order to minimize the reactive power and higher harmonics of currents, as well as to improve the electromagnetic compatibility of electrical traction networks and systems of railroad automation, modern electric rolling stock of alternating current emp...
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Lucky Pradigta Setiya Raharja, Ony Asrarul Q., Zainal Arief, Novie Ayub Windarko
Pág. 91 - 118
In this research, modified PWM has been applied to the multilevel inverter (MLI) single-phase three-level diode clamp full bridge. Modified PWM is performed to produce minimum Total Harmonic Distortion (THD) the voltage because the quality of the good vo...
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Huatan Chen, Gaofeng Zheng, Juan Liu, Jiaxin Jiang, Guoyi Kang, Xiang Wang, Wenwang Li and Yifang Liu
The precise manufacturing of micro/nano structures is the key to the rapid development of flexible micro/nano systems. In this paper, a sinusoidal high-voltage alternating current (AC) power is designed for electrohydrodynamic direct-writing (EDW) techno...
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Mohammed El-Nagar, Khaled Ahmed, Eman Hamdan, Ayman S. Abdel-Khalik, Mostafa S. Hamad and Shehab Ahmed
Proper operation of the grid-tie transformerless converters under unbalanced and distorted conditions entails a precise detection of the frequency and fundamental component of the grid voltage. One of the main problems that could arise during the estimat...
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Yeshou Xu, Qi He, Ying-Qing Guo, Xing-Huai Huang, Yao-Rong Dong, Zhong-Wei Hu and Jinkoo Kim
Viscoelastic dampers are conventional passive vibration control devices with excellent energy dissipation performance. The fractional derivative has a simple form and high accuracy in the modelling of viscoelastic materials/dampers. The internal variable...
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Davide Forcellini and Anthony Tessari
This paper presents parametric studies that assess the role of loading factors (i.e., number of cycles, frequency, and amplitude) on liquefaction-induced failure by performing numerical simulations. Most of the existing literature considers the effects o...
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Diliana Friedewald
Large-amplitude excitations need to be considered for gust load analyses of transport aircraft in cruise flight conditions. Nonlinear amplitude effects in transonic flow are, however, only marginally taken into account. The present work aims at closing t...
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Kostas Belibassakis, Julien Touboul, Elodie Laffitte and Vincent Rey
Extended mild-slope models (MMSs) are examined for predicting the characteristics of normally incident waves propagating over sinusoidal bottom topography in the presence of opposing shearing currents. It is shown that MMSs are able to provide quite good...
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Jong-Yun Yoon and Byeongil Kim
Torsional systems with gear pairs such as the gearbox of wind turbines or vehicle driveline systems inherently show impact phenomena due to clearance-type nonlinearities when the system experiences sinusoidal excitation. This research investigates the vi...
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Bo Wu, Jianting Zhou, Jingzhou Xin, Hong Zhang, Liangliang Zhang and Xianyi Yang
In the present study, multiple-fan active control wind tunnel tests are conducted to investigate the aerodynamic forces on a 5:1 rectangular cylinder in sinusoidal streamwise winds with different angles of attack (AoA). The effects of the frequency, ampl...
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Chenghua Cong, Honggang Qin and Xingyou Yi
The unsteady characteristics of the second throat of a transonic wind tunnel have an important influence on the design and test of the wind tunnel. Therefore, the forced oscillation characteristics were studied by a numerical simulation method. The gover...
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Ning Sun, Jie Li, Debiao Zhang, Chenjun Hu, Xiaofei Peng, Jie Jiang, Shuai Wang, Zeyu Zhang and Wentao Cui
The performance of analog-to-digital converters (ADCs) has reached a bottleneck due to the limitations of the manufacturing process and testing environment. Time-interleaved ADC (TIADC) technology can increase the sampling rate without changing the resol...
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