Physics – Condensed Matter – Materials Science
Scientific paper
2007-03-21
IEEE Transactions on Dielectrics and Electrical Insulation Vol. 12, No. 4; August 2005
Physics
Condensed Matter
Materials Science
18 pages,12 figures,16 references. Index terms: Space charge, deconvolution, Tikhonov regularization, solid dielectrics
Scientific paper
The deconvolution algorithm for measuring distribution of space charge under dc by the pressure wave propagation (PWP) method is studied in this paper. A new Fredholm integral equation of first kind, including a space charge distribution without a partial differential operator is presented. Numerical methods based on Tikhonov regularization for solving this integral equation and the original PWP equation are studied. Numerical simulation is studied for the effect of signal-to-noise ratio (SNR), and comparison with other algorithms is discussed. The numerical solution of an electric field distribution from measurements of a LDPE specimen is obtained successfully.
Hu Luoquan
Zhang Yewen
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