Showing 1-25 of 31,951 resultsfor "Index Terms":Finite Length
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Anew C-FDFD method capturing per-unit length parameter of quasi-TEM mode transmission line with reduced computational resource
2020 IEEE 70th Electronic Components and Technology Conference (ECTC)
Year: 2020 | Conference Paper |
Cited by: Papers (1)
Through this paper, authors will propose a new C-FDFD (compact finite-difference frequency-domain) method, which can reduce the size of computational matrix by using a new matrix formulation and quasi-TEM approximation. Generally, the decreased matrix size reduces the computational time and required memory size. When the number of numerical grids in x-and y-axis, which are employed for modeling tr...Show More
Modeling and Simulation of Aluminium Nitride-Based Piezoelectric Micromachined Ultrasonic Transducer for Ultrasound Imaging
2019 14th Symposium on Piezoelectrcity, Acoustic Waves and Device Applications (SPAWDA)
Year: 2019 | Conference Paper |
Cited by: Papers (5)
In this work, a PMUT based on Pt/AlN/Pt/TiO2/SiO2/Si structure with square suspended membrane is proposed and modeled by performing finite element method (FEM) software COMSOL. The vibration mode, resonant frequency and effective electro-mechanical coupling coefficient (keff2) of the proposed AlN-based PMUT are analyzed. It is shown that the (0,1) resonant mode of PMUT reaches up to 25.73 MHz when...Show More
Simulation of All-dielectric Metasurfaces with Finite Thickness Based on FDTD-GSTC
2018 International Applied Computational Electromagnetics Society Symposium - China (ACES)
Year: 2018 | Conference Paper |
Cited by: Papers (1)
We propose an effective simulation method of Finite Difference Time Domain-Generalized Sheet Transition Conditions (FDTD-GSTC) for electromagnetic fields from all dielectric metasurfaces with finite thickness. The susceptibilities are introduced in place of physical metasurfaces, which can be calculated from reflection or transmission coefficients with periodic boundary conditions. The standard FD...Show More
Electromagnetic simulation and modeling of suspended-substrate microstrip lines have an important role in designing microwave and millimeter- wave integrated circuits. Suspended- substrate microstrip lines are sometimes manufactured and placed in a shield to reduce performance degradation from external influences. In this paper, we will illustrate modeling of shielded, suspended-substrate, microst...Show More
Structure of the Transfer Function Numerator Coefficients as One of the Factors of the Structural Precision of IIR Digital Filters
2020 IEEE East-West Design & Test Symposium (EWDTS)
Year: 2020 | Conference Paper |
Cited by: Papers (1)
This work was carried out during the implementation of a project dedicated to the synthesis of recursive digital filters with a finite word length. The approach used in this project considers the finite word length already when calculating the zeros and poles. The calculated zeros and poles are not distorted by structural synthesis. The calculations are based on what the zeros and poles of a digit...Show More
A study for starting characteristic analysis method of salient pole synchronous motors
2016 Petroleum and Chemical Industry Technical Conference (PCIC)
Year: 2016 | Conference Paper |
Cited by: Papers (3)
Solid rotors can be adapted to synchronous motors of 5 MW and over in applications with high inertia loads. The eddy currents induced in the solid pole are used for starting of the motor and their paths are changed depending on the design of the rotor shape unlike the synchronous motors with damper windings or cages. In this paper, the starting characteristic of a 7 MW solid salient pole synchrono...Show More
Analytical magnetic field and eddy currents computation in a conductive rod wound by a cylindrical coil of finite length
2022 2nd International Conference on Advanced Electrical Engineering (ICAEE)
Year: 2022 | Conference Paper |
In this paper, we present an analytical model to calculate the magnetic field, the mutual inductance and eddy current in a long conductive rod wound by a cylindrical coil of finite length. The proposed model can be included as an efficient and fast analytical tool in the design optimization approach of axisymetrical electromagnetic actuators. This model, formulated in magnetic vector potential, is...Show More
On the use of the finite conductor length approach for the calculation of electromagnetic transients in overhead transmission lines
Andreas I. Chrysochos;Christos G. Kaloudas;Theofilos A. Papadopoulos;Grigoris K. Papagiannis
Despite the progress that has been made in the representation of the imperfect earth, the majority of the most-known earth formulations assume that the Overhead Transmission Line (OHTL) is infinitely long. In this paper, earth-return correction terms for finite length OHTL are presented and compared to formulas of infinite line length. For this purpose, the corresponding per-unit-length parameters...Show More
Analysis and Experimental Testing of a New Type of Variable Stiffness Magnetic Spring with a Linear Stroke Length
2021 IEEE Energy Conversion Congress and Exposition (ECCE)
Year: 2021 | Conference Paper |
Cited by: Papers (4)
In this paper a new type of variable stiffness magnetic spring is proposed. The magnetic spring is composed of radially magnetized outer rotor magnets coupled with axially magnetized inner cylindrical magnets. It is shown that this magnet arrangement creates a highly linear stroke length. By rotating the inner magnetic rotor, the stiffness of the spring can be adjusted. The force as a function of ...Show More
Finite-Length Analysis of Irregular Repetition Slotted ALOHA in the Waterfall Region
IEEE Communications Letters
Cited by: Papers (46)
A finite-length analysis is introduced for irregular repetition slotted ALOHA (IRSA) that enables to accurately estimate its performance in the moderate-to-high packet loss probability regime, i.e., in the so-called waterfall region. The analysis is tailored to the collision channel model, which enables mapping the description of the successive interference cancellation process onto the iterative ...Show More
Bending Actuation of Ferromagnetic Soft Continuum Robot under Spatially non-uniform Magnetic Fields
2022 28th International Conference on Mechatronics and Machine Vision in Practice (M2VIP)
Year: 2022 | Conference Paper |
Cited by: Papers (1)
Cardiovascular disease seriously affects the health and life quality of human being in nowadays society. In this paper, a new type of ferromagnetic soft continuum robot (FSCR) is devised to realize the flexible maneuver in the blood vessel to treat cardiovascular disease. Its bending actuation performance is studied under the various distance between the robot and a spherical permanent magnet, whi...Show More
Multiconductor transmission lines in multilayered circuit are used to reduce dimensions and minimal pulse distortion and crosstalk for high-speed and high- density digital applications. In this paper we present modeling of the capacitance and inductance of two conductors in two different dielectric layers, two conductors in the same dielectric layers, and three conductors in three different dielec...Show More
MML Inference of Hierarchical Probabilistic Finite State Machine
2019 Cybersecurity and Cyberforensics Conference (CCC)
Year: 2019 | Conference Paper |
Cited by: Papers (1)
A Finite State Machine (FSM) is a mathematical model of computation which can effectively model a sequence of words or tokens. A grammar representing a collection of tokens in a finite alphabet might contain regularities that are not fully captured by a deterministic formal grammar. Therefore, the simple FSM model is extended to include some probabilistic structure in the grammar which is now term...Show More
Simulation of Crosstalk on Printed Circuit Boards by FDTD, FEM, and a Circuit Model
K. Hollaus;O. Biro;P. Caldera;G. Matzenauer;G. Paoli;G. Plieschnegger
IEEE Transactions on Magnetics
Cited by: Papers (18)
The aim of this work is to study crosstalk between microstrips on printed circuit boards with the finite element method, the finite difference time domain method, and a circuit model up to several gigahertz. One simple benchmark problem for near end cross talk and one for far end crosstalk have been manufactured and analyzed. Measured scattering parameters are compared with simulated ones obtained...Show More
Holding Force Characteristics of Preformed Helical Fitting Based on Finite Element Method
Lv Zhongbin;Tao Yaguang;Liu Xiaohui;Ye Zhongfei;Li Hongpan;Sun Yuntao;Yan Bo
As an important part of transmission lines, preformed helical fitting plays an indispensable role in the safe and stable operation of electronic circuits. However, due to the poor service environment of transmission lines, preformed helical fitting can often slip, scatter, and detwist. This paper explores variations in the holding force of the preformed helical fitting under different geometric pa...Show More
Based on the comparative analysis of the length of the air gap length of the finite element simulation permanent magnet synchronous motor
Guodong Zhang;Ningran Song;Guangxu Zhou;Mengmei Zhu;Lei Guo;Hongyang Li
2022 25th International Conference on Electrical Machines and Systems (ICEMS)
Year: 2022 | Conference Paper |
Cited by: Papers (2)
Hydrogen fuel cell vehicle has the advantages of low carbon environmental protection, long running time and abundant fuel, and is a major development direction of new energy vehicles. As high speed permanent magnet synchronous motor is widely used in hydrogen fuel cell air compressor, its working efficiency and dynamic performance requirements are becoming higher and higher. In order to solve the ...Show More
Analytical computation of eddy currents and inductances in a conductive rod of finite length wound by a moveable cylindrical coil
2022 IEEE International Conference on Electrical Sciences and Technologies in Maghreb (CISTEM)
Year: 2022 | Conference Paper |
Cited by: Papers (1)
This paper presents a complete 2D analytical model for calculating the magnetic field, eddy current and mutual inductance in a conductive rod of finite length wound by a cylindrical coil. The proposed model combines the truncated region eigenfunction expansion (TREEM) method with the separation of variables technique to solve Maxwell’s equations in terms of the magnetic vector potential in the axi...Show More
Numerical Solution for Couple Elliptic Boundary Value Problem
2019 First International Conference of Computer and Applied Sciences (CAS)
Year: 2019 | Conference Paper |
The Galerkin finite elements method (GAFEM) is used to find the numerical solution (NS) of the couple linear elliptic boundary value problem (CLEBVP). The solution of the CLEBVP is approximated by a linear combination of piecewise linear and continuous basis functions, upon substituting this approximated solution into the CLEBVP the problem then reduces to solve a “Galerkin” linear algebraic syste...Show More
This paper proposes a numerical analysis for calculating the capacitance of rectangular coaxial lines. We illustrate how to model and simulate the capacitance of rectangular coaxial lines using COMSOL, a finite element software. The goal is to use COMSOL to determine the capacitance per unit length of rectangular coaxial lines. We compared the results with those obtained by other methods and found...Show More
Modeling of 3-D-Printed Helical-Microstrip Transmission Lines for RF Applications
This article presents a detailed analysis of the electrical performances of 3-D-printed helical-microstrip transmission lines. The transmission properties of these lines are studied theoretically. As a result, a model is proposed that consists of closed formulae for determining the characteristic impedance and the electrical length of the helical-microstrip transmission lines, as a function of ele...Show More
Modelling of the Shunt Reactor by using Finite Element Analysis
2020 XI International Conference on Electrical Power Drive Systems (ICEPDS)
Year: 2020 | Conference Paper |
Cited by: Papers (7)
The use of the finite element method in the designing of the power transformer is very common, especially in no-load and full-load conditions. However, the use of the finite element techniques in the manufacturing of the electrical shunt reactor is still limited. In this study, finite element analysis is used to design the 150 MVAr, air-core oil-filled shunt reactor. Several designs have been made...Show More
When Fiber Reinforced Polymer/Plastic (FRPs) are used to repair cracked steel plates, the bonding materials will be inevitably trapped into cracks. This phenomenon, however, has not been considered in the current theoretical analyses of most scholars. In this paper, a bridging force model was introduced to simulate the bonding materials between upper and lower surfaces of cracks. A finite element ...Show More
Anisotropic material properties of human left common carotid artery using inverse finite element and analytical methods
2018 25th National and 3rd International Iranian Conference on Biomedical Engineering (ICBME)
Year: 2018 | Conference Paper |
The focus of this study is to obtain the material properties of human common carotid artery (CCA). A hyper-elastic strain energy model is used to predict mechanical behavior of arterial wall from an inflation/deflation test on the human CCA intact wall. For this purpose, two methods are used in order to identify arterial material parameters: analytical and inverse finite element method. An optimiz...Show More
An Interpolative Finite-Element Modeling and the Starting Process Simulation of a Large Solid Pole Synchronous Machine
IEEE Transactions on Magnetics
Cited by: Papers (18)
Direct simulation of the starting process of an electric machine using a 3-D transient finite-element analysis (FEA) is very time consuming. To overcome this difficulty, an interpolative finite-element modeling of a large solid pole synchronous motor (SPSM) is presented and its starting process is simulated in this paper. In order to take into account the effects of cooling ducts and end turns, th...Show More
A Study for Starting Characteristic Analysis Method of Salient Pole Synchronous Motors
Solid rotors can be adapted to synchronous motors of 5 MW and over in applications with high inertia loads. The eddy currents induced in the solid pole are used for starting of the motor and their paths are changed depending on the design of the rotor shape unlike the synchronous motors with damper windings or cages. In this paper, the starting characteristic of a 7-MW solid salient pole synchrono...Show More
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