Log in

Relevant bibliographies by topics / HARMONIC COMPONENT / Journal articles

To see the other types of publications on this topic, follow the link: HARMONIC COMPONENT.

Journal articles on the topic 'HARMONIC COMPONENT'

Author: Grafiati

Published: 11 September 2023

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 journal articles for your research on the topic 'HARMONIC COMPONENT.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.

1

Yuan, Xiao Dong, Qun Li, Jin Hui, and Bin Chen. "Research on the Existence of Genuine Inter-Harmonic Components Based on the Component Appearance Rate." Advanced Materials Research 875-877 (February 2014): 1847–51. http://dx.doi.org/10.4028/www.scientific.net/amr.875-877.1847.

Full text

Abstract:

The inter-harmonic spectrum of an electrical voltage or current from discrete Fourier transform can not only be caused by genuine inter-harmonic components, but can also be caused by other system disturbances. Therefore, the existence determination of genuine inter-harmonic s from the spectrum becomes the premise for further calculation of inter-harmonic parameters. From the theoretical perspective, this paper firstly analyzes and points out that the waveform difference among each cycle in the analysis window is the cause of the existence of inter-harmonic spectrum, and then presents a method

APA, Harvard, Vancouver, ISO, and other styles

2

Zhang, Run Han, Luo Quan Hu, Wei Fan, and Xiao Lin Liu. "Application of Wavelet Transform with Tunable Q-Factor to Analysis of Non-Stationary Harmonics." Applied Mechanics and Materials 526 (February 2014): 182–86. http://dx.doi.org/10.4028/www.scientific.net/amm.526.182.

Full text

Abstract:

Harmonics of power system include steady and transient components, extraction and analysis of them can improve the power quality. Tunable Q-factor wavelet transform (TQWT), for which the Q-factor can be easily specified, is adopted to accomplish the extraction of non-stationary harmonic component from the noisy signal. The proposed method decomposes a signal into noise component and non-stationary harmonic component based on suitable Q-factor. Feasibility and effectiveness of the proposed method are verified by the simulation study.

APA, Harvard, Vancouver, ISO, and other styles

3

Mustafa, M. T. "Harmonic Morphisms Projecting Harmonic Functions to Harmonic Functions." Abstract and Applied Analysis 2012 (2012): 1–8. http://dx.doi.org/10.1155/2012/315757.

Full text

Abstract:

For Riemannian manifoldsMandN, admitting a submersionϕwith compact fibres, we introduce the projection of a function via its decomposition into horizontal and vertical components. By comparing the Laplacians onMandN, we determine conditions under which a harmonic function onU=ϕ−1(V)⊂Mprojects down, via its horizontal component, to a harmonic function onV⊂N.

APA, Harvard, Vancouver, ISO, and other styles

4

He, Liyuan, Chuanwei Zhou, and Lanjiang Wu. "Current Harmonic Control Method of Wind Turbine Based on PIR Controller." Journal of Physics: Conference Series 2480, no. 1 (2023): 012006. http://dx.doi.org/10.1088/1742-6596/2480/1/012006.

Full text

Abstract:

Abstract Wind power equipment technology is the basis for the development of wind power generation. Aiming at the problem that the traditional PI controller is difficult to control the AC component of the current in the DQ axis, resulting in a large number of current harmonics in the process of power generation, which seriously affects the efficiency of power generation. This paper proposes a current harmonic control method for wind turbines based on a PIR controller. The mathematical model of wind power generation is constructed based on the synchronous rotating coordinate system. The current

APA, Harvard, Vancouver, ISO, and other styles

5

Sadiq, Muhammad Arslan, Dr Nusrat Husain, Fawad Shaukat, et al. "Prominence of Filtering Techniques for Harmonics Mitigation in Advanced Power Electronics Systems." Vol 4 Issue 2 4, no. 2 (2022): 512–25. http://dx.doi.org/10.33411/ijist/2022040220.

Full text

Abstract:

With the advancement in technology, non-linear loads, continue to increase, and the enigma of harmonics is getting more and more serious. The huge addition of electronic loads in power systems has formed the problem of harmonic generation that has resulted in many associated drawbacks. This paper aims to analyze the harmonics in advanced power electronics-based systems and describes a solution to mitigate them through two distinguished filtering techniques. A rigorous analysis is done concerning the generation of harmonic distortion through different types of loads and harmonic mitigation by e

APA, Harvard, Vancouver, ISO, and other styles

6

Su, Yu Xiang, Guo Ping Liu, Lin Li, and Xiao Qun Shen. "Improved Hilbert-Huang Transform Applied in Power Quality Detection in Ship Power System." Applied Mechanics and Materials 88-89 (August 2011): 365–72. http://dx.doi.org/10.4028/www.scientific.net/amm.88-89.365.

Full text

Abstract:

In this paper, Hilbert-Huang Transform (HHT) and its improved method is introduced for detection and analysis of power quality in ship power system for the first time. This method is applied in detecting surge current and voltage interruption etc. of the ship power grid. Beginning-ending time, time-frequency, time-amplitude of the disturbance signal can be obtained accurately with HHT method. Mode mixing occurs when using empirical mode decomposition (EMD) to analyze harmonics, and consequently, all single harmonic components cannot be effectively decomposed. The improved HHT method based on F

APA, Harvard, Vancouver, ISO, and other styles

7

Fei, Zhenyan, Ming Lyu, Mariano Méndez, et al. "The Harmonic Component of the Millihertz Quasi-periodic Oscillations in 4U 1636–53." Astrophysical Journal 922, no. 2 (2021): 119. http://dx.doi.org/10.3847/1538-4357/ac2501.

Full text

Abstract:

Abstract We studied the harmonics of the millihertz quasi-periodic oscillations (mHz QPOs) in the neutron star low-mass X-ray binary 4U 1636–53 using the Rossi X-ray Timing Explorer observations. We detected the harmonics of the mHz QPOs in 73 data intervals, with most of them in the transitional spectra state. We found that the ratio between the rms amplitude of the harmonic and that of the fundamental remains constant in a wide range of the fundamental frequency. More importantly, we studied, for the first time, the rms amplitude of the harmonics versus energy in 4U 1636–53 in the 2–5 keV ra

APA, Harvard, Vancouver, ISO, and other styles

8

Sasmoko, Priyo. "SIMULATOR GENERATOR HARMONIK." Gema Teknologi 16, no. 3 (2012): 146. http://dx.doi.org/10.14710/gt.v16i3.4713.

Full text

Abstract:

Priyo Sasmoko, in this paper explain that the need of electric power recently progressively complex, not only the requirement of availability of electricity, but the quality of energy have become prime facie demand. Studies of electricity quality have been conducted by many experts, one of them is about harmonic. Harmonic represent waving current or tension which is tension distortion at electric power system mains so that can result unideal waveform. The study of harmonic required appliance or obyek which need to be checked. In this research Simulator Generator Harmonik is made a harmonic gen

APA, Harvard, Vancouver, ISO, and other styles

9

Louossi, Theodore, Fabrice Kwefeu Mbakop, Abdouramani Dadje, and Noel Djongyang. "Modeling of an Electrical Energy Switching System in Multisource Power Plants: The Case of Grid Connected Photovoltaic and Wind Power Systems." Journal of Renewable Energy 2022 (November 28, 2022): 1–15. http://dx.doi.org/10.1155/2022/9972334.

Full text

Abstract:

This paper proposes a multisource power plant management strategy for the proposed structure. This power plant consists of photovoltaic, wind, and grid. The principle of this management strategy is based on the reference currents and defines two components of the current namely a harmonic component related to the harmonics contained in the load current and current called fundamental related to the fundamental of the load current. This proposed strategy allows the different renewable sources to supply the load partially or totally. The harmonic component performs the power quality function whil

APA, Harvard, Vancouver, ISO, and other styles

10

Alghamdi, Sultan, Hatem F. Sindi, Ahmed Al-Durra, et al. "Reduction in Voltage Harmonics of Parallel Inverters Based on Robust Droop Controller in Islanded Microgrid." Mathematics 11, no. 1 (2022): 172. http://dx.doi.org/10.3390/math11010172.

Full text

Abstract:

In this article, a distributed control scheme to compensate for voltage harmonics in islanded microgrids is presented, where each distributed generation (DG) source has a primary control level and a secondary control level. In addition to the voltage and current control loops, the primary control level of DGs includes virtual impedance control loops in the main and harmonic components, which are responsible for dividing the power of the main component and the non-main component (harmonic) between the DGs of the microgrid, respectively. For coordinated operation between the inverters when facin

APA, Harvard, Vancouver, ISO, and other styles

11

Nazir, Refdinal, Krismadinata Krismadinata, and Rizka Amalia. "The Camparison of Harmonic Distortion Self-Excited Induction Generator with Isolated Synchronous Generator under Non-linear Loads." International Journal of Power Electronics and Drive Systems (IJPEDS) 6, no. 4 (2015): 759. http://dx.doi.org/10.11591/ijpeds.v6.i4.pp759-771.

Full text

Abstract:

In this paper, the harmonic distortion for Self-Excited Induction Generator (SEIG) and an isolated synchronous generator (ISG) under non-linear load during steady state conditions are analyzed. The voltage and current harmonics distortion for both generators are calculated using the transfer function method in frequency domain for SEIG and phasor diagram method for ISG. This analysis is done independently one by one component for all harmonic components appear. The analysis results for both generators are verified to the laboratory test results. For loading with the same non-linear load to bot

APA, Harvard, Vancouver, ISO, and other styles

12

Ghosh Moulic, S., and L. S. Yao. "Mixed Convection Along a Wavy Surface." Journal of Heat Transfer 111, no. 4 (1989): 974–79. http://dx.doi.org/10.1115/1.3250813.

Full text

Abstract:

The results of a study of mixed-convection flow along a wavy surface are presented. The forced-convection component of the heat transfer contains two harmonics. The amplitude of the first harmonic is proportional to the amplitude of the wavy surface; the second harmonic is proportional to the square of this amplitude. Thus, for a slightly wavy surface, only the influence of the first harmonic can be detected. The natural-convection component is a second harmonic, with a frequency twice that of the wavy surface. Since natural convection has a cumulative effect, the second harmonic eventually be

APA, Harvard, Vancouver, ISO, and other styles

13

Zhao, Jinshuai, Honggeng Yang, Xiaoyang Ma, and Fangwei Xu. "Evaluation of Harmonic Contributions for Multi Harmonic Sources System Based on Mixed Entropy Screening and an Improved Independent Component Analysis Method." Entropy 22, no. 3 (2020): 323. http://dx.doi.org/10.3390/e22030323.

Full text

Abstract:

Evaluating the harmonic contributions of each nonlinear customer is important for harmonic mitigation in a power system with diverse and complex harmonic sources. The existing evaluation methods have two shortcomings: (1) the calculation accuracy is easily affected by background harmonics fluctuation; and (2) they rely on Global Positioning System (GPS) measurements, which is not economic when widely applied. In this paper, based on the properties of asynchronous measurements, we propose a model for evaluating harmonic contributions without GPS technology. In addition, based on the Gaussianity

APA, Harvard, Vancouver, ISO, and other styles

14

Song, Peng Fei, Jian Sheng Zhang, and Yong Hua Zhang. "Harmonic Detection Based on Genetic BP Neural Network." Applied Mechanics and Materials 427-429 (September 2013): 1892–95. http://dx.doi.org/10.4028/www.scientific.net/amm.427-429.1892.

Full text

Abstract:

In view of the grid has a large number of harmonics, serious interference power quality, but the existing harmonic detection has many disadvantages, this paper uses genetic algorithm to optimize the BP neural network (GA-BP),Combined with fanaticism, independent component technique in the separation technology, achieve rapid separation and accurate fitting for harmonic reduction. The method to solve the problem of slow convergence speed of BP neural network and easier to fall into local optimal solution; Separation, independent component analysis in the signal could not accurate reduction the

APA, Harvard, Vancouver, ISO, and other styles

15

Yao, Jianjun, Chenguang Xiao, Zhenshuai Wan, Shiqi Zhang, and Xiaodong Zhang. "Acceleration Harmonics Identification for an Electro-Hydraulic Servo Shaking Table Based on a Nonlinear Adaptive Algorithm." Applied Sciences 8, no. 8 (2018): 1332. http://dx.doi.org/10.3390/app8081332.

Full text

Abstract:

Since the electro-hydraulic servo shaking table came into existence, many nonlinear elements, such as, dead zone, friction and backlash, as well as its acceleration response has higher harmonics which result in acceleration harmonic distortion, when the electro-hydraulic system is excited by sinusoidal signal. For suppressing the harmonic distortion and precisely identify harmonics, a combination of the adaptive linear neural network and least mean M-estimate (ADALINE-LMM), is proposed to identify the amplitude and phase of each harmonic component. Specifically, the Hampel’s three-part M-estim

APA, Harvard, Vancouver, ISO, and other styles

16

Elgammal, Adel, and Curtis Boodoo. "Optimal Hybrid Filtering Strategy Using Adaptive Genetic-Fuzzy Logic Control for Harmonics Reduction in a Standalone Micro Hydroelectric Power Plant Coordinated with a PV System." European Journal of Electrical Engineering and Computer Science 5, no. 4 (2021): 56–62. http://dx.doi.org/10.24018/ejece.2021.5.4.348.

Full text

Abstract:

Micro Hydro Power Plants are a type of power production that uses the force of river flows or waterfalls to generate electricity. The generator generates current waves and harmonic voltage, which are distorted wave disturbances that cause fundamental frequency multiplication. The major goal of this work is to design a reliable, efficient, and innovative harmonic mitigation approach for a stand-alone micro hydroelectric system that is coordinated with a photovoltaic renewable energy system utilising an active power filter. We may pick the active filter highest harmonic to be suppressed using th

APA, Harvard, Vancouver, ISO, and other styles

17

Mujezinović, Adnan, Emir Turajlić, Ajdin Alihodžić, Maja Muftić Dedović, and Nedis Dautbašić. "Calculation of Magnetic Flux Density Harmonics in the Vicinity of Overhead Lines." Electronics 11, no. 4 (2022): 512. http://dx.doi.org/10.3390/electronics11040512.

Full text

Abstract:

This paper considers the method for the calculation of magnetic flux density in the vicinity of overhead distribution lines which takes into account the higher current harmonics. This method is based on the Biot–Savart law and the complex image method. The considered method calculates the values of the magnetic flux density for each harmonic component of the current separately at all points of interest (usually lateral profile). In this way, it is possible to determine the contributions of individual harmonic components of the current intensity to the total value of magnetic flux density. Base

APA, Harvard, Vancouver, ISO, and other styles

18

Gockel, Hedwig E., and Robert P. Carlyon. "On mistuning detection and beat perception for harmonic complex tones at low and very high frequencies." Journal of the Acoustical Society of America 152, no. 1 (2022): 226–39. http://dx.doi.org/10.1121/10.0012351.

Full text

Abstract:

This study assessed the detection of mistuning of a single harmonic in complex tones (CTs) containing either low-frequency harmonics or very high-frequency harmonics, for which phase locking to the temporal fine structure is weak or absent. CTs had F0s of either 280 or 1400 Hz and contained harmonics 6–10, the 8th of which could be mistuned. Harmonics were presented either diotically or dichotically (odd and even harmonics to different ears). In the diotic condition, mistuning-detection thresholds were very low for both F0s and consistent with detection of temporal interactions (beats) produce

APA, Harvard, Vancouver, ISO, and other styles

19

Vivert, Miguel, Rafael Diez, Marc Cousineau, Diego Bernal Cobaleda, Diego Patino, and Philippe Ladoux. "Real-Time Adaptive Selective Harmonic Elimination for Cascaded Full-Bridge Multilevel Inverter." Energies 15, no. 9 (2022): 2995. http://dx.doi.org/10.3390/en15092995.

Full text

Abstract:

Selective Harmonics Elimination is a high-efficiency modulation method for multilevel inverters that allows handling very high voltage applications. It eliminates the most significant harmonics and fixes the desired fundamental component. The main issue of these techniques is the complex process to obtain the appropriate switching-angles, being necessary to calculate them offline, meaning that if some disturbances occur, the system will not be compensated. This article proposes a real-time selective harmonic elimination for a single-phase cascaded multilevel inverter. The control strategy main

APA, Harvard, Vancouver, ISO, and other styles

20

Rastegar, J., L. Yuan, and J. Zhang. "Smart Actuator Positioning and Displacement Transmissibility in Serial and Parallel Robot Manipulators for Performance Enhancement." Journal of Mechanical Design 127, no. 4 (2004): 589–95. http://dx.doi.org/10.1115/1.1898340.

Full text

Abstract:

A method is presented for the evaluation of the transmissibility of displacement from smart (active) actuators integrated in the structure of robot manipulators to the manipulator joint and end-effector displacements. The method is based on studying the characteristics of the Jacobian of the mapping function between the two displacements for a given position of the robot manipulator. The developed method provides a tool for the determination of the positioning of smart actuators to provide maximum effectiveness in eliminating high harmonics of the joint or the end-effector motion. In robots wi

APA, Harvard, Vancouver, ISO, and other styles

21

NORCIA, ANTHONY M., WOLFGANG WESEMANN, and RUTH E. MANNY. "Electrophysiological correlates of vernier and relative motion mechanisms in human visual cortex." Visual Neuroscience 16, no. 6 (1999): 1123–31. http://dx.doi.org/10.1017/s0952523899166124.

Full text

Abstract:

Vernier onset/offset thresholds were measured both psychophysically and with the steady-state VEP by introducing a series of horizontal breaks in a vertical square-wave luminance grating. Several diagnostic tests indicated that the first harmonic component of the evoked response generated by periodic modulation of offset gratings taps mechanisms that encode the relative position of spatial features. In the first test, a first harmonic component was only found with targets that contained transitions between collinear and noncollinear states. VEP vernier onset/offset thresholds obtained with fov

APA, Harvard, Vancouver, ISO, and other styles

22

Li, Po, Xiang Li, Jinghui Li, Yimin You, and Zhongqing Sang. "A Real-Time Harmonic Extraction Approach for Distorted Grid." Mathematics 9, no. 18 (2021): 2245. http://dx.doi.org/10.3390/math9182245.

Full text

Abstract:

Harmonic interference is a major hazard in the current power system that affects power quality. How to extract harmonics quickly and accurately is the premise to ensure the sustainable operation of power system, which is particularly important in the field of new energy power generation. In this paper, a harmonic extraction method based on a time-varying observer is proposed. Firstly, a frequency estimation algorithm is used to estimate the power grid current frequency, which can estimate the frequency in real time. Then, applying the zero-crossing detection method to convert the frequency int

APA, Harvard, Vancouver, ISO, and other styles

23

Junesco, Devan, Shahad Al-Youif, Mohannad Jabbar Mnati, and Mohammad Ali Tofigh. "Various Passive Filter Designs Proposed for Harmonic Extenuation in Industrial Distribution Systems." International Journal of Engineering & Technology 7, no. 4.11 (2018): 75. http://dx.doi.org/10.14419/ijet.v7i4.11.20691.

Full text

Abstract:

This paper discusses various passive filter designs to reduce the harmonic in the industrial distributions system. The passive filter used is a single and double tuned harmonic filter. In the designing of this filter, analyzing filter properties of passive component of the filter. The study was conducted to examine the efficacy of using single and double tuned filters in reducing harmonic as well as determining the best location to install the filters. Different system effects and load limits on harmonic distortion and performance of filters are also being examined. The output of the simulatio

APA, Harvard, Vancouver, ISO, and other styles

24

Xu, Maoguang, Zhongqing Sang, Xiang Li, Yimin You, and Dongyun Dai. "An Observer-Based Harmonic Extraction Method with Front SOGI." Machines 10, no. 2 (2022): 95. http://dx.doi.org/10.3390/machines10020095.

Full text

Abstract:

With the further development of harmonic pollution in the power system, scientists have carried out research on harmonics. Among them, harmonic detection is the first step in harmonic research. In this paper, a harmonic detection method based on an observer is proposed. This method first uses the cascaded Second-Order Generalized Integration (SOGI) algorithm, which can filter the Direct Current (DC) component of the input signal to extract the fundamental frequency, and then uses a time-varying observer to extract the harmonics. This can be used to extract harmonics from a distorted online gri

APA, Harvard, Vancouver, ISO, and other styles

25

Kostinskiy, S. S. "Review and results of studies of the harmonic composition of the current consumed by low-power frequency converters, as well as methods and devices to reduce their negative impact on power supply systems." Power engineering: research, equipment, technology 22, no. 2 (2020): 27–42. http://dx.doi.org/10.30724/1998-9903-2020-22-2-27-42.

Full text

Abstract:

The ACS150 frequency Converter was chosen as the object for experimental research. On the basis of the measurements it is concluded that in the spectral composition of current drawn by the frequency Converter, in addition to currents the main harmonic component is dominated by currents 5, 7, 11, 13, and 17th harmonics, i.e. harmonic components of odd non-multiple of three. Currents 3, 9 and 15 th harmonic components are also present in the spectral composition, but their value is much smaller. Also, based on the data obtained, it can be argued that with a decrease in the frequency of motor spe

APA, Harvard, Vancouver, ISO, and other styles

26

Chang, Gary W., Yu-Luh Lin, Yu-Jen Liu, Gary H. Sun, and Johnson T. Yu. "A Hybrid Approach for Time-Varying Harmonic and Interharmonic Detection Using Synchrosqueezing Wavelet Transform." Applied Sciences 11, no. 2 (2021): 752. http://dx.doi.org/10.3390/app11020752.

Full text

Abstract:

With widespread non-linear loads and the increasing penetration of distributed generations in the power system, harmonic pollution has become a great concern. The causes of harmonic pollution not only include the integer harmonics, but also interharmonics, which exacerbate the complexity of harmonic analysis. In addition, the output variability of highly non-linear loads and renewables such as electric arc furnaces and photovoltaic solar or wind generation may lead to weakly time-varying harmonics and interharmonics in both frequency and magnitude. These features present challenges for accurat

APA, Harvard, Vancouver, ISO, and other styles

27

Guo, Yufu, Hang Xu, and Aobing Chi. "Broadband Dynamic Phasor Measurement Method for Harmonic Detection." Electronics 11, no. 11 (2022): 1667. http://dx.doi.org/10.3390/electronics11111667.

Full text

Abstract:

A large number of nonlinear loads and distributed energy sources are connected to the power system, leading to the generation of broadband dynamic signals including inter-harmonics and decaying DC (DDC) components. This causes deterioration of power quality and errors during power measurement. Therefore, effective phasor estimation methods are needed for accurate monitoring and effective analysis of harmonics and interharmonic phasors. For this purpose, an algorithm is proposed in this paper that is implemented in two parts. The first part is based on the least square method in order to obtain

APA, Harvard, Vancouver, ISO, and other styles

28

Liu, Shaojie, Yingying Zhao, Yue Tian, Yubo Fan, and Jifang Ye. "Research on Supraharmonics Suppression Strategy of Distribution Network based on Dynamic Cooperative Control of Multiple Harmonic Sources." Journal of Physics: Conference Series 2488, no. 1 (2023): 012047. http://dx.doi.org/10.1088/1742-6596/2488/1/012047.

Full text

Abstract:

Abstract In view of the increasing number of supraharmonic sources in distribution network and the increasing distortion of power grid waveform, a strategy of supraharmonic suppression in distribution network based on dynamic coordinated control of multi-harmonic sources is proposed. The characteristic harmonic current components related to carrier frequency in the output current of each supraharmonic source are shifted by several angles through carrier phase shifting, so that the total current harmonics of all supraharmonic sources merged into point of common coupling (PCC) are obviously redu

APA, Harvard, Vancouver, ISO, and other styles

29

Zhao, W., H. A. Wolgamot, P. H. Taylor, and R. Eatock Taylor. "Gap resonance and higher harmonics driven by focused transient wave groups." Journal of Fluid Mechanics 812 (January 9, 2017): 905–39. http://dx.doi.org/10.1017/jfm.2016.824.

Full text

Abstract:

The first and higher harmonic components of the resonant fluid response in the gap between two identical fixed rectangular boxes are experimentally investigated in a wave basin. Gap response is excited by transient wave groups (being based on scaled versions of the autocorrelation function of sea-state spectra, representing NewWaves, the average shape of large waves in a sea state). Several different wave groups with different maximum surface elevations, spectral peak frequencies and bandwidths are used, while the bilge shape of the boxes and approach angle of the waves are also varied. Unlike

APA, Harvard, Vancouver, ISO, and other styles

30

Solekhan, Solekhan, Yoyon K. Suprapto, and Wirawan Wirawan. "Impulsive spike enhancement on gamelan audio using harmonic percussive separation." International Journal of Electrical and Computer Engineering (IJECE) 9, no. 3 (2019): 1700. http://dx.doi.org/10.11591/ijece.v9i3.pp1700-1710.

Full text

Abstract:

Impulsive spikes often occur in audio recording of gamelan where most existing methods reduce it. This research offers new method to enhance audio impulsive spike in gamelan music that is able to reduce, eliminate and even strengthen spikes. The process separates audio components into harmonics and percussive components. Percussion component is set to rise or lowered, and the results of the process combined with harmonic components again. This study proposes a new method that allows reducing, eliminating and even amplifying the spike. From the similarity test using the Cosine Distance method,

APA, Harvard, Vancouver, ISO, and other styles

31

Bezzubm, Maksim, Oleksiy Bialobrzheskyi, and Oleg Todorov. "The power harmonic components distribution study in the power circuit of a dynamic voltage restorer." Electrical Engineering and Power Engineering, no. 1 (June 30, 2023): 19–29. http://dx.doi.org/10.15588/1607-6761-2023-1-2.

Full text

Abstract:

Purpose. Investigation of the distribution of harmonic power components in the power circuit of a dynamic voltage restorer. Methodology. On the basis of the differential equations of the power circuit of a dynamic restorer, a search for the relationship between the mode parameters and the parameters of the circuit elements is performed. On the basis of the obtained expressions, a model of a dynamic voltage regulator was created using the methods of mathematical modeling in the visual programming environment.. Findings. The equations that reflect the relationship between the mode parameters of

APA, Harvard, Vancouver, ISO, and other styles

32

Mehta, Anahita H., and Andrew J. Oxenham. "Role of perceptual integration in pitch discrimination at high frequencies." JASA Express Letters 2, no. 8 (2022): 084402. http://dx.doi.org/10.1121/10.0013429.

Full text

Abstract:

At very high frequencies, fundamental-frequency difference limens (F0DLs) for five-component harmonic complex tones can be better than predicted by optimal integration of information, assuming performance is limited by noise at the peripheral level, but are in line with predictions based on more central sources of noise. This study investigates whether there is a minimum number of harmonic components needed for such super-optimal integration effects and if harmonic range or inharmonicity affects this super-optimal integration. Results show super-optimal integration, even with two harmonic comp

APA, Harvard, Vancouver, ISO, and other styles

33

Ichsari, Lintang Fauzia, Gentur Handoyo, Heryoso Setiyono, et al. "Studi Komparasi Hasil Pengolahan Pasang Surut Dengan 3 Metode (Admiralty, Least Square Dan Fast Fourier Transform) Di Pelabuhan Malahayati, Banda Aceh." Indonesian Journal of Oceanography 2, no. 2 (2020): 121–28. http://dx.doi.org/10.14710/ijoce.v2i2.7985.

Full text

Abstract:

Pelabuhan Malahayati menjadi alur lintas serta tempat sandar bagi peti kemas domestik. Untuk menjalankan aktifitas pelabuhan secara optimal serta merencanakan pembangunan pelabuhan, pengetahuan mengenai tipe dan karakteristik pasang surut sangat penting. Pengolahan data pasang surut dengan berbagai metode dapat memberikan hasil yang berbeda-beda. Tujuan penelitian ini adalah untuk mengetahui karakteristik pasang surut dan komponen harmonik pembangkit pada lokasi penelitian, mengetahui perbandingan hasil pengolahan pasang surut dengan metode admiralty, least square dan fast fourier transform. S

APA, Harvard, Vancouver, ISO, and other styles

34

Ismail, Baharuddin, Syed Idris Syed Hassan, Rizalafande Che Ismail, and Azralmukmin Azmi. "Elimination of Lower Order Harmonics in Seven-Level Cascaded Inverters." Applied Mechanics and Materials 793 (September 2015): 206–10. http://dx.doi.org/10.4028/www.scientific.net/amm.793.206.

Full text

Abstract:

This paper deals with an elimination of lower order harmonics in the seven - level cascaded inverters. The main objective of selective harmonic elimination pulse width modulation strategy is eliminating lower order harmonic by solving nonlinear equations, while the fundamental component is satisfied. In this paper, the Particle Swarm Optimization (PSO) is applied to a seven-level inverter for solving the nonlinear equation. With the proposed approach, the required switching angles are computed efficiently by PSO algorithm. Lower order harmonics up to the 7th are eliminated. Simulation results

APA, Harvard, Vancouver, ISO, and other styles

35

Hörlein, R., S. Steinke, A. Henig, et al. "Dynamics of nanometer-scale foil targets irradiated with relativistically intense laser pulses." Laser and Particle Beams 29, no. 4 (2011): 383–88. http://dx.doi.org/10.1017/s0263034611000462.

Full text

Abstract:

AbstractIn this paper we report on an experimental study of high harmonic radiation generated in nanometer-scale foil targets irradiated under normal incidence. The experiments constitute the first unambiguous observation of odd-numbered relativistic harmonics generated by the v × B component of the Lorentz force verifying a long predicted property of solid target harmonics. Simultaneously the observed harmonic spectra allow in-situ extraction of the target density in an experimental scenario which is of utmost interest for applications such as ion acceleration by the radiation pressure of an

APA, Harvard, Vancouver, ISO, and other styles

36

Zhang, Xian, Tao Tao, Gedong Jiang, Xuesong Mei, and Chuang Zou. "A Refined Dynamic Model of Harmonic Drive and Its Dynamic Response Analysis." Shock and Vibration 2020 (June 29, 2020): 1–13. http://dx.doi.org/10.1155/2020/1841724.

Full text

Abstract:

To highlight the key factors which influence the dynamic performance of the harmonic drive, a refined harmonic drive model considering nonlinear stiffness, kinematic error, and friction of the critical components is established. A dedicated experimental apparatus based on double motor twisting is constructed to measure the characteristics of harmonic drive, and the attribute parameters of the proposed model are identified. A series of experiments on the dynamic transmission error at different driving velocities are carried out to verify the proposed model. Based on the proposed model, the infl

APA, Harvard, Vancouver, ISO, and other styles

37

Aalami, H. A., and R. Salehi. "Extended Modulation Index with more Eliminated Low Order Harmonics at Cascaded Multilevel Inverters." Applied Mechanics and Materials 492 (January 2014): 123–27. http://dx.doi.org/10.4028/www.scientific.net/amm.492.123.

Full text

Abstract:

Principle aim in standard Selective Harmonic Elimination pulse wide modulation (SHE-PWM) is elimination of low-order harmonics as well as production of desired fundamental component. To accomplish this objective, a set of N switching angles should be determined. In fact, N-1 angles are hired to remove N-1 harmonics from voltage waveform and one angle is allotted to produce the fundamental. This paper presents a solution in order to remove low order harmonics as much as possible. It suggests eliminating next harmonic instead of highest order harmonic in infeasible points. A genetic algorithm is

APA, Harvard, Vancouver, ISO, and other styles

38

Cooper, Bonnie, Barry B. Lee, and Dingcai Cao. "Macaque retinal ganglion cell responses to visual patterns: harmonic composition, noise, and psychophysical detectability." Journal of Neurophysiology 115, no. 6 (2016): 2976–88. http://dx.doi.org/10.1152/jn.00411.2015.

Full text

Abstract:

The goal of these experiments was to test how well cell responses to visual patterns can be predicted from the sinewave tuning curve. Magnocellular (MC) and parvocellular (PC) ganglion cell responses to different spatial waveforms (sinewave, squarewave, and ramp waveforms) were measured across a range of spatial frequencies. Sinewave spatial tuning curves were fit with standard Gaussian models. From these fits, waveforms and spatial tuning of a cell's responses to the other waveforms were predicted for different harmonics by scaling in amplitude for the power in the waveform's Fourier expansio

APA, Harvard, Vancouver, ISO, and other styles

39

Siregar, Yulianta, Waleed Khalid Al-Azzawi, Zulkarnaen Pane, Unedo E Parhusip, and Suherman Suherman. "Study of harmonic distortion from variable speed drive and energy saving lamps." Indonesian Journal of Electrical Engineering and Computer Science 27, no. 2 (2022): 667. http://dx.doi.org/10.11591/ijeecs.v27.i2.pp667-677.

Full text

Abstract:

The power <span>electronic component has been widely used in the current industrial era. It has been considered more efficient than the previous devices as it saves more space and uses less power. One example of power electronic components is the variable speed drive for speed regulation of electric motors in the industrial world. Another application of power electronic components is to be used in energy-saving lamps. The use of power electronic components in these two loads generates harmonic distortion and reduces network power quality. In this paper, the authors analyzed the harmonics

APA, Harvard, Vancouver, ISO, and other styles

40

Zhukovsky, K. V. "Analytical account for off-axis effects in X-ray radiation of free electron lasers." Izvestiya vysshikh uchebnykh zavedenii. Fizika 64, no. 1 (2021): 21–28. http://dx.doi.org/10.17223/00213411/64/1/21.

Full text

Abstract:

We give analytical description of generation of harmonics of the undulator radiation (UR) with account for the finite electron beam size, emittance, off-axis beam deviation and electron energy spread, as well as for the constant magnetic components and field harmonics effects. We give exact analytical expressions for the generalized Bessel and Airy functions, which describe the spectrum line shape and intensities in the two-frequency bi-harmonic undulator with account for the above factors. The obtained analytical formulae distinguish contributions of each field component and every undulator a

APA, Harvard, Vancouver, ISO, and other styles

41

Liu, Jieng-Jang, and Yee-Pien Yang. "Disk Wobble Control in Optical Disk Drives." Journal of Dynamic Systems, Measurement, and Control 127, no. 3 (2004): 508–14. http://dx.doi.org/10.1115/1.1988339.

Full text

Abstract:

Focusing errors in optical disk drives comprise significant periodic components and an eventful dc content. The dc component is not explicitly taken into account in many periodic compensation methods. This paper investigates the design of adaptive feedforward cancellation (AFC) and frequency adaptive control technique (FACT) algorithms for periodic components as well as dc disturbance compensation. Both algorithms are applied as a plug-in module to an optical disk drive for demonstrating their facility in the reduction of focusing errors. By making good use of frequency sampling filter (FSF),

APA, Harvard, Vancouver, ISO, and other styles

42

McKeefry, D. J., M. H. A. Russell, I. J. Murray, and J. J. Kulikowski. "Amplitude and phase variations of harmonic components in human achromatic and chromatic visual evoked potentials." Visual Neuroscience 13, no. 4 (1996): 639–53. http://dx.doi.org/10.1017/s0952523800008543.

Full text

Abstract:

AbstractOccipital visual evoked potentials (VEPs) were recorded in response to low-contrast, low spatial-frequency chromatic, and achromatic gratings. Fast Fourier Transform (FFT) and time-domain analysis were used to reveal differences in harmonic content and amplitude of chromatic and achromatic response components over a wide range of temporal frequencies. The chromatic ON/OFF VHP is dominated by the fundamental component indicating that onset and offset responses are different. This type of response is typical of neurons with sustained type response characteristics. Conversely, the achroma

APA, Harvard, Vancouver, ISO, and other styles

43

Aboadla, Ezzidin Hassan, Sheroz Khan, Mohamed H. Habaebi, et al. "A novel optimization harmonic elimination technique for cascaded multilevel inverter." Bulletin of Electrical Engineering and Informatics 8, no. 2 (2019): 405–13. http://dx.doi.org/10.11591/eei.v8i2.1500.

Full text

Abstract:

The main goal of utilizing Selective Harmonic Elimination (SHE) techniques in Multilevel Inverters (MLI) is to produce a high-quality output voltage signal with a minimum Total Harmonic Distortion (THD). By calculating N switching angles, SHE technique can eliminate (N-1) low order odd harmonics of the output voltage waveform. To optimized and obtained these switching angles, N of nonlinear equations should be solved using a numerical method. Modulation index (m) and duty cycle play a big role in selective harmonic elimination technique to obtain a minimum harmonic distortion and desired funda

APA, Harvard, Vancouver, ISO, and other styles

44

HU, Z. D., Z. M. SHENG, W. J. DING, W. M. WANG, Q. L. DONG, and J. ZHANG. "Electromagnetic emission from laser wakefields in underdense magnetized plasmas." Journal of Plasma Physics 78, no. 4 (2012): 421–27. http://dx.doi.org/10.1017/s002237781200027x.

Full text

Abstract:

AbstractThe laser wakefield structure in a magnetized underdense plasma is studied analytically and numerically. Because of the DC magnetic field perpendicular to the laser propagation direction, an electromagnetic component appears in addition to the normal electrostatic component. This electromagnetic component can transmit partially into vacuum at the plasma–vacuum boundary as shown by particle-in-cell simulation. It is found that the emission has components both at the fundamental plasma frequency and its harmonics if the wakefield is driven at a high amplitude. Comparing with the emission

APA, Harvard, Vancouver, ISO, and other styles

45

Yang, Jianfeng, and Ningning Meng. "Active Disturbance Rejection Control of Three-Phase LCL Grid-Connected Inverter under Unbalanced Grid Voltage." Mathematical Problems in Engineering 2022 (February 14, 2022): 1–10. http://dx.doi.org/10.1155/2022/3702607.

Full text

Abstract:

When the three-phase LCL grid-connected inverter operates under the condition of unbalanced grid voltage, the influence of the negative sequence component in the grid voltage will cause the grid-connected inverter system to produce active and reactive dual-frequency interference. This will cause the grid-side current to have many low-order harmonics, mainly the third harmonic, which does not conform the IEEE-Std. 929–2000 standard. In order to solve this problem, this paper designs a current auto-disturbance-rejection controller, which speeds up the tracking response speed of the system and re

APA, Harvard, Vancouver, ISO, and other styles

46

Selvajyothi, K., and P. A. Janakiraman. "FPGA-Based Software Implementation of Series Harmonic Compensation for Single Phase Inverters." VLSI Design 2010 (January 24, 2010): 1–14. http://dx.doi.org/10.1155/2010/512312.

Full text

Abstract:

This paper presents a single chip FPGA (Altera Cyclone II) controlled single phase inverter, programmed for the reduction of harmonics in the output voltage. Separate composite digital observers have been designed for extracting the fundamental and harmonic components of the voltage and the highly distorted current signals, particularly when the inverter supplies nonlinear loads. These observers have been embedded into the FPGA along with the controllers and I/O interfaces. The multiple observers yield very pure in-phase and quadrature voltage signals for use in the outer loop and similar sign

APA, Harvard, Vancouver, ISO, and other styles

47

Meliga, P. "Harmonics generation and the mechanics of saturation in flow over an open cavity: a second-order self-consistent description." Journal of Fluid Mechanics 826 (August 4, 2017): 503–21. http://dx.doi.org/10.1017/jfm.2017.439.

Full text

Abstract:

The flow over an open cavity is an example of supercritical Hopf bifurcation leading to periodic limit-cycle oscillations. One of its distinctive features is the existence of strong higher harmonics, which results in the time-averaged mean flow being strongly linearly unstable. For this class of flows, a simplified formalism capable of unravelling how exactly the instability grows and saturates is lacking. This study builds on previous work by Mantič-Lugo et al. (Phys. Rev. Lett., vol. 113, 2014, 084501) to fill in the gap using a parametrized approximation of an instantaneous, phase-averaged

APA, Harvard, Vancouver, ISO, and other styles

48

Choi, Min Joo, Gwan Suk Kang, Dong Guk Paeng, et al. "Characterization of the Harmonic Generation from Cavitating Bubbles Interacted with a Diagnostic Ultrasound in the Focal Region of High Intensity Focused Ultrasound." Key Engineering Materials 321-323 (October 2006): 1123–28. http://dx.doi.org/10.4028/www.scientific.net/kem.321-323.1123.

Full text

Abstract:

Harmonic image (HI) has been proposed to be promising for visualizing lesions produced by therapeutic high intensity focused ultrasound (HIFU). The study characterizes harmonics generated from the bubble cavitating at the focal region of a therapeutic HIFU field in response to a typical diagnostic ultrasound. Based on Gilmore model, it was simulated the nonlinear dynamics of the bubble being resonated at 1 MHz of the therapeutic ultrasound and driven by a typical 3.5 MHz diagnostic pulse. It was shown that harmonic generation increased with MI in a sigmoid pattern where the rapid and transient

APA, Harvard, Vancouver, ISO, and other styles

49

Cai, Guowei, Lixin Wang, Deyou Yang, Zhenglong Sun, and Bo Wang. "Harmonic Detection for Power Grids Using Adaptive Variational Mode Decomposition." Energies 12, no. 2 (2019): 232. http://dx.doi.org/10.3390/en12020232.

Full text

Abstract:

The harmonic pollution problem in power grids has become increasingly prominent with the large-scale application of power electronic equipment, nonlinear loads, and renewable energy. This study proposes a method based on adaptive variational mode decomposition (AVMD) and Hilbert transform (HT) that is applicable to harmonic detection in power system. The AVMD method constructs and solves the constrained variational model. Then, a single-frequency harmonic component with stable features can be obtained. The proposed method can effectively avoid the recursive process in empirical mode decomposit

APA, Harvard, Vancouver, ISO, and other styles

50

Chen, L. F., J. Zang, P. H. Taylor, et al. "An experimental decomposition of nonlinear forces on a surface-piercing column: Stokes-type expansions of the force harmonics." Journal of Fluid Mechanics 848 (June 1, 2018): 42–77. http://dx.doi.org/10.1017/jfm.2018.339.

Full text

Abstract:

Wave loading on marine structures is the major external force to be considered in the design of such structures. The accurate prediction of the nonlinear high-order components of the wave loading has been an unresolved challenging problem. In this paper, the nonlinear harmonic components of hydrodynamic forces on a bottom-mounted vertical cylinder are investigated experimentally. A large number of experiments were conducted in the Danish Hydraulic Institute shallow water wave basin on the cylinder, both on a flat bed and a sloping bed, as part of a European collaborative research project. High

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!