Topic
Computational electromagnetics
About: Computational electromagnetics is a research topic. Over the lifetime, 6412 publications have been published within this topic receiving 113727 citations. The topic is also known as: Electromagnetic field analysis.
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01 Oct 1956
TL;DR: In this paper, a method for measuring the returned signal scattered from an object in an electromagnetic field is described, and a new computation of the scattering function for conducting spheres is tabulated.
Abstract: A laboratory method is described for measuring the returned signal scattered from an object in an electromagnetic field. Measurements on conducting spheres and discs are compared with theoretical formulae. A new computation of the scattering function for conducting spheres is tabulated.
23 citations
TL;DR: In this paper, the relative behavior of the two sets of reduced data records obtained by using scattering theory to eliminate sphere size, etc., from the original data was compared with statistical mechanics approximations for the hard sphere gas in order to delineate differences, and to indicate that the analytical procedures developed for the dynamical gas model may be applied to isolate the analogous functions for naturally occurring distributions.
Abstract: We compare certain reduced data records for scattering of 5-mm electromagnetic waves by two sets of Styrofoam spheres of different diameter, moving randomly within a slab-region Styrofoam container. For the small spheres we summarize raw measurements for the forward scattered coherent phase, for the average intensities, and for the variances and covariance of phase-quadrature components of the instantaneous field; analogous results for the large spheres were given previously [1]. The emphasis is on the relative behavior of the two sets of reduced data records obtained by using scattering theory to eliminate sphere size, etc., from the original data. In particular, we compare appropriate, reduced data with statistical mechanics approximations for the "hard sphere gas" in order to delineate differences, and to indicate that the analytical procedures developed for the "dynamical gas model" may be applied to isolate the analogous functions for naturally occurring distributions.
23 citations
TL;DR: A new parallel Vlasov-Maxwell solver is developed by adopting a stable but less dissipative scheme for time integration of conservation laws, which has successfully achieved a high scalability on massively parallel supercomputers with multicore scalar processors.
Abstract: Numerical schemes for solving the Vlasov-Maxwell system equations are studied. For studies of cross-scale coupling between fluid-scale dynamics and particle-scale kinetics in collisionless plasma, both highly scalable kinetic code and huge supercomputer are essential. In the present study, a new parallel Vlasov-Maxwell solver is developed by adopting a stable but less dissipative scheme for time integration of conservation laws. The new code has successfully achieved a high scalability on massively parallel supercomputers with multicore scalar processors. The new code has been applied to 2P3V (two dimensions for position and three dimensions for velocity) problems of cross-scale plasma processes such as magnetic reconnection, Kelvin-Helmholtz instability, and interaction between the solar wind and an asteroid.
23 citations
16 May 2005
TL;DR: This paper discovers and researches problems on numerical oscillations of the solution in element-free Galerkin method when it uses high order polynomial basis, and puts forward the meshless method based on orthogonal basis (MLMBOB), which holds nearly all qualities of EFGM and removes many drawbacks of it.
Abstract: This paper discovers and researches problems on numerical oscillations of the solution in element-free Galerkin method (EFGM) when it uses high order polynomial basis, and puts forward the meshless method based on orthogonal basis (MLMBOB), which is composed of essential boundary conditions with Penalty method, then gets the numerical solutions of the partial differential equations. This method holds nearly all qualities of EFGM and removes many drawbacks of it, and it has high accuracy when high order orthogonal basis is used. Therefore, it is fit for many problems in engineering computational electromagnetics. Examples are given to prove the proposed method.
23 citations
16 Dec 1992
TL;DR: In this paper, the authors discuss the mu-synthesis of an electromagnetic suspension system and use the D-K iteration approach for the controller design, which achieves not only nominal performance and robust stability, but also robust performance.
Abstract: The authors discuss the mu -synthesis of an electromagnetic suspension system. The issue of modeling a real physical electromagnetic suspension system is discussed. A nominal model as well as a set of models in which the real system is assumed to reside is derived. Different model structures and possible model parameter values are fully employed to determine unstructured additive plant perturbation, which directly yield the uncertainty weighting. Based on the set of plant models, the robust performance control objectives are defined. Using the mu -Analysis and Synthesis Toolbox, use is made of the D-K iteration approach for the controller design. Implementing the controller with a digital signal processor mu PD77230, experiments are carried out to evaluate the robust performance of this design. It was shown that the closed-loop system with the mu -controller achieves not only nominal performance and robust stability, but also robust performance. >
23 citations