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| Frequency Domain Deconvolution Technique and Its Implementation in the Recovery of the Space Charge Signal |
| Cai Chuan, Li Xuguang, Yin Yi, Wang Yaqun |
| Shanghai Jiaotong University Shanghai 200240 China |
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Abstract Space charge distribution signals are often distorted to have obvious over-shoots due to the frequency response of the measurement system. The reasons why the output signal is distorted are analyzed in this paper. Deconvolution is proved necessary for space charge signal recovery. However, deconvolution is a kind of inverse problem so that it is hard to gain the undistorted waveform which is produced by the space charge vibration during the test processes. Gauss filter is employed to solve the ill-condition of deconvolution. A discrete frequency domain algorithm is designed based on the modified deconvolution method and is implemented with LabVIEW. With the data obtained from LDPE/nano-Ag composite, it is found that the Gaussian filter is capable of restraining the oscillation of the deconvoluted data and therefore enhances the resolution of space charge profiles.
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Received: 24 June 2008
Published: 17 February 2014
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2009, Vol. 24 
