Academic literature on the topic 'Mode discrete fourier transform circuit'

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Journal articles on the topic "Mode discrete fourier transform circuit"

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Romaniuk, F. A., V. Yu Rumiantsev, Yu V. Rumiantsev, and V. S. Kachenya. "Orthogonal Components Forming of the Microprocessor-Based Protection Input Signals." ENERGETIKA. Proceedings of CIS higher education institutions and power engineering associations 63, no. 4 (2020): 328–39. http://dx.doi.org/10.21122/1029-7448-2020-63-4-328-339.

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The use of orthogonal components (OS) is the main direction of determining information parameters in microprocessor relay protection and automation of electric power systems. Most of the measuring devices used in modern protection and automation devices can be implemented using known operating systems. Digital non-recursive frequency filters based on discrete Fourier transform are used for OS selection. The main disadvantage of these filters is their low performance that exceeds the period of industrial frequency. For the construction of high-speed measuring devices, this time of establishing
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Garcia-Guevara, Francisco M., Francisco J. Villalobos-Piña, Ricardo Alvarez-Salas, Eduardo Cabal-Yepez, and Mario A. Gonzalez-Garcia. "Stator Fault Detection in Induction Motors by Autoregressive Modeling." Mathematical Problems in Engineering 2016 (2016): 1–7. http://dx.doi.org/10.1155/2016/3409756.

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This study introduces a novel methodology for early detection of stator short circuit faults in induction motors by using autoregressive (AR) model. The proposed algorithm is based on instantaneous space phasor (ISP) module of stator currents, which are mapped toα-βstator-fixed reference frame; then, the module is obtained, and the coefficients of the AR model for such module are estimated and evaluated by order selection criterion, which is used as fault signature. For comparative purposes, a spectral analysis of the ISP module by Discrete Fourier Transform (DFT) is performed; a comparison of
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Bellan, Diego. "Circuit Modeling and Statistical Analysis of Differential-to-Common-Mode Noise Conversion Due to Filter Unbalancing in Three-Phase Motor Drive Systems." Electronics 9, no. 10 (2020): 1612. http://dx.doi.org/10.3390/electronics9101612.

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This work deals with circuit modeling of noise mode conversion due to system asymmetry in a three-phase motor drive system. In fact, it is well-known that in case of system asymmetry (e.g., slightly asymmetrical LC filter parameters), differential-mode noise can convert into common-mode noise, resulting in increased level of conducted electromagnetic interference. This phenomenon has been observed with measurements and reported in previous works, but a clear and rigorous analytical description is still a challenging point. The main novelty proposed in the paper is a rigorous analytical descrip
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Syvokobylenko, V. F., and V. A. Lysenko. "APPLICATION OF WAVELET TRANSFORM FOR PHASE-TO-GROUND FAULT PROTECTION IN MEDIUM VOLTAGE ELECTRICAL NETWORKS." Tekhnichna Elektrodynamika 2021, no. 4 (2021): 55–62. http://dx.doi.org/10.15407/techned2021.04.055.

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For electrical networks with voltage of 6-35 kV with a compensated, isolated or resistor-grounded neutral, a phase-to-ground protection has been developed, in which, based on the results of the time-frequency wavelet transform of zero-sequence currents, voltages and their derivatives, using the obtained analytical expression, the total reactive power wavelet for different frequencies is determined. It is shown that at the initial moment of a phase-to-ground fault on the damaged feeder the power is always positive, and on the undamaged feeder it is negative, regardless of the operating mode of
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Tian, An-Hong, Cheng-Biao Fu, Yu-Chung Li, and Her-Terng Yau. "Intelligent Ball Bearing Fault Diagnosis Using Fractional Lorenz Chaos Extension Detection." Sensors 18, no. 9 (2018): 3069. http://dx.doi.org/10.3390/s18093069.

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In this study we used a non-autonomous Chua’s circuit, and the fractional Lorenz chaos system. This was combined with the Extension theory detection method to analyze the voltage signals. The bearing vibration signals, measured using an acceleration sensor, were introduced into the master and slave systems through a Chua’s circuit. In a chaotic system, minor differences can cause significant changes that generate dynamic errors. The matter-element model extension can be used to determine the bearing condition. Extension theory can be used to establish classical and sectional domains using the
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Zhu, Yong, Zhen Chong Wang, Chang Xin Nai, and Lu Dong. "Measurement System for Soil Complex Resistivity Based on LabVIEW." Applied Mechanics and Materials 192 (July 2012): 333–40. http://dx.doi.org/10.4028/www.scientific.net/amm.192.333.

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Complex resistivity of soil must be measured using low-frequency power supply to overcome the skin effect, but, because of using higher frequency, the existing conventional complex resistivity meter is not suitable for soil. To this end, with the discrete Fourier transform and spectrum analysis, a measurement system for soil complex resistivity based on LabVIEW virtual instrumentation development platform and PXI data acquisition card was designed and developed. The system can measure the complex resistivity of the soil under low frequency, track the fluctuations of supply frequency automatica
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Khoa, N. M., and D. D. Tung. "Modeling for Development of Simulation Tool: Impact of TCSC on Apparent Impedance Seen by Distance Relay." Engineering, Technology & Applied Science Research 8, no. 5 (2018): 3332–37. http://dx.doi.org/10.48084/etasr.2199.

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The impact of thyristor controlled series capacitor (TCSC) on distance protection relays in transmission lines is analyzed in this paper. Voltage and current data are measured and collected at the relay locations to calculate the apparent impedance seen by distance protection relays in the different operating modes of the TCSC connected to the line. Short-circuit faults which occur at different locations on the power transmission line are considered in order to locate the fault for the purpose of evaluating the impact of TCSC on the distance protection relay. Matlab/Simulink simulation softwar
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Chen, Jian Hui. "An Improved EMD Method and its Application in Nonstationary Signals Analysis." Advanced Materials Research 429 (January 2012): 313–17. http://dx.doi.org/10.4028/www.scientific.net/amr.429.313.

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Empirical mode decomposition (EMD) method based on HHT has exhibited unique advantages such as adaptability and highly efficiency in many nonlinear, nonstationary signals processing applications. It breaks the uncertainty principle limit, but the traditional EMD still has its deficiencies. In this article, we construct a new wavelet which has excellent decomposing-frequency performance and energy concentration, and then an improved EMD method based on this wavelet is presented. Results of numerical simulation show the validity and efficiency of the method proposed in paper are better than trad
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Qu, Liu, Deng, et al. "Analysis and Adjustment of Positioning Error of PSD System for Mobile SOF-FTIR." Sensors 19, no. 23 (2019): 5081. http://dx.doi.org/10.3390/s19235081.

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A PSD-based solar spot position detection system is developed for solar tracking closed-loop control of mobile SOF-FTIR (Solar Occultation Flux method based on Fourier Transform Infrared spectrometer). The positioning error factors of PSD (position sensitive detector) are analyzed in detail. A voltage model for PSD signal conditioning circuit has been established to investigate the noise factors. The model shows that the positioning error is mainly related to PSD dark current and circuit gain. A static voltage deduction calibration method based on genetic algorithm is proposed to eliminate the
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Torchio, Riccardo, Dimitri Voltolina, Paolo Bettini, Federico Moro, and Piergiorgio Alotto. "Marching On-In-Time Unstructured PEEC Method for Electrically Large Structures with Conductive, Dielectric, and Magnetic Media." Electronics 9, no. 2 (2020): 242. http://dx.doi.org/10.3390/electronics9020242.

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The Marching On-In-Time (MOT) unstructured Partial Element Equivalent Circuit (PEEC) method for time domain electromagnetic problems is presented. The method allows the transient analysis of electrically large electromagnetic devices consisting of conductive, dielectric, and magnetic media coupled with external lumped circuits. By re-formulating PEEC following the Coulombian interpretation of magnetization phenomena and by using electric and magnetic vector potentials, the proposed approach allows for a completely equivalent treatment of electric and magnetic media and inhomogeneous and anisot
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Dissertations / Theses on the topic "Mode discrete fourier transform circuit"

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Kiyohara, Takayuki. "Generation of heralded multi-photon parallel state for realizing a large-scale photonic quantum circuit." Kyoto University, 2020. http://hdl.handle.net/2433/253284.

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Dvořák, Vojtěch. "Implementace výpočtu FFT v obvodech FPGA a ASIC." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2013. http://www.nusl.cz/ntk/nusl-220087.

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The aim of this thesis is to design the implementation of fast Fourier transform algorithm, which can be used in FPGA or ASIC circuits. Implementation will be done in Matlab and then this form of implementation will be used as a reference model for implementation of fast Fourier transform algorithm in VHDL. To verify the correctness ofdesign verification enviroment will be created and verification process wil be done. Program that will generate source code for various parameters of the module performing a fast Fourier transform will be created in the last part of this thesis.
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Conference papers on the topic "Mode discrete fourier transform circuit"

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Hall, Trevor J., and Mehedi Hasan. "Universal photonic integrated circuit architecture: The discrete Fourier Transform case." In 2016 Photonics North (PN). IEEE, 2016. http://dx.doi.org/10.1109/pn.2016.7537881.

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Yesilli, Melih C., and Firas A. Khasawneh. "On Transfer Learning of Traditional Frequency and Time Domain Features in Turning." In ASME 2020 15th International Manufacturing Science and Engineering Conference. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/msec2020-8274.

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Abstract There has been an increasing interest in leveraging machine learning tools for chatter prediction and diagnosis in discrete manufacturing processes. Some of the most common features for studying chatter include traditional signal processing tools such as Fast Fourier Transform (FFT), Power Spectral Density (PSD), and the Auto-correlation Function (ACF). In this study, we use these tools in a supervised learning setting to identify chatter in accelerometer signals obtained from a turning experiment. The experiment is performed using four different tool overhang lengths with varying cut
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Buffum, Daniel H., and Sanford Fleeter. "The Aerodynamics of an Oscillating Cascade in a Compressible Flow Field." In ASME 1989 International Gas Turbine and Aeroengine Congress and Exposition. American Society of Mechanical Engineers, 1989. http://dx.doi.org/10.1115/89-gt-271.

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Fundamental experiments are performed in the NASA Lewis Research Center Transonic Oscillating Cascade Facility to investigate and quantify the aerodynamics of a cascade of biconvex airfoils executing torsion mode oscillations at realistic reduced frequency values. Both steady and unsteady airfoil surface pressures are measured at two inlet Mach numbers, 0.65 and 0.80, and two incidence angles, 0 and 7 degrees, with the harmonic torsional airfoil cascade oscillations at realistic high reduced frequency and unsteady data obtained at several interblade phase angle values. The time-variant pressur
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Bertini, L., B. Monelli, P. Neri, C. Santus, and A. Guglielmo. "Robot Assisted Modal Analysis on a Stationary Bladed Wheel." In ASME 2014 12th Biennial Conference on Engineering Systems Design and Analysis. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/esda2014-20636.

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This paper shows an automated procedure to experimentally find the eigenmodes of a bladed wheel with highly three-dimensional geometry. The stationary wheel is supported in free-free conditions, neglecting stress-stiffening effects. The single input / multiple output approach was followed. The vibration speed was measured by means of a laser-Doppler vibrometer, and an anthropomorphic robot was used for accurate orientation and positioning of the measuring laser beam, allowing multiple measurements during a limited testing time. The vibration at corresponding points on each blade was measured a
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Mollasalehi, Ehsan, David H. Wood, and Qiao Sun. "Small Wind Turbine Tower Structural Vibration." In ASME 2012 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/imece2012-87736.

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A major barrier to the acceptance of small wind turbines is that they are perceived to be noisy particularly when mounted on monopole towers rather than traditional guy-wired ones. This paper discusses an aspect of noise propagation that has not been studied previously: vibration of the tower. To start studying the tower’s behavior, twenty four accelerometers were attached in two orthogonal lines along the 10 m tower of Southwest Windpower Skystream 2.4 kW wind turbine located at the edge of the city of Calgary. About 15 minutes of data were recorded in order to extract natural frequencies and
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Pardowitz, Benjamin, Ulf Tapken, Lars Neuhaus, and Lars Enghardt. "Experiments on an Axial Fan Stage: Time Resolved Analysis of Rotating Instability Modes." In ASME Turbo Expo 2014: Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/gt2014-26323.

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Rotating Instability (RI) occurs at off-design conditions in axial compressors, predominantly in rotor configurations with large tip clearances. Characteristic spectral signatures with side-by-side peaks below the blade passing frequency are typically referred to RI located in the clearance region next to the leading edge (LE). Each peak can be assigned to a dominant circumferential mode. RI is the source of the clearance noise and an indicator for critical operating conditions. Earlier studies at an annular cascade pointed out that RI modes of different circumferential orders occur stochastic
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Li, Yeni, Hany S. Abdel-Khalik, and Elisa Bertino. "Online Adversarial Learning of Reactor State." In 2018 26th International Conference on Nuclear Engineering. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/icone26-82372.

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This paper is in support of our recent efforts to designing intelligent defenses against false data injection attacks, where false data are injected in the raw data used to control the reactor. Adopting a game-model between the attacker and the defender, we focus here on how the attacker may estimate reactor state in order to inject an attack that can bypass normal reactor anomaly and outlier detection checks. This approach is essential to designing defensive strategies that can anticipate the attackers moves. More importantly, it is to alert the community that defensive methods based on appro
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