DocumentCode :
1927550
Title :
Identification of dead time using wavelet
Author :
Tachibana, Yasuo ; Suzuki, Yoshinori
Author_Institution :
Dept. of Electr. & Electron. Eng., Kanagawa Inst. of Technol., Japan
Volume :
3
fYear :
1998
fDate :
31 Aug-4 Sep 1998
Firstpage :
1370
Abstract :
In this paper, the authors discuss a method of identification of the dead time in a linear system using a wavelet. The authors use nonstationary step-like functions as the test signal. First a set of differential operators are proposed for calculating the differentials of an observed signal by the Daubechies wavelet. The differential operators are constructed by iterative projections of the differential of the scaling function for a multiresolution analysis into a dilation subspace. Using the above differentials, they propose a method to estimate the parameters of a linear system for a priori assumed dead time. In order to estimate the dead time of a transfer function they evaluate a criterion function for several values of the dead time. The value that maximizes the criterion function becomes the estimate of the dead time. They present several numerical examples. It is shown that the proposed method is effective in identification of dead time
Keywords :
control system analysis; iterative methods; linear systems; parameter estimation; transfer functions; wavelet transforms; Daubechies wavelet; control simulation; dead time identification; differential operators; iterative projections; linear systems; multiresolution analysis; nonstationary step-like functions; parameter estimation method; transfer function; Differential equations; Digital filters; Discrete transforms; Frequency estimation; Linear systems; Multiresolution analysis; Parameter estimation; Signal processing; Testing; Transfer functions;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Industrial Electronics Society, 1998. IECON '98. Proceedings of the 24th Annual Conference of the IEEE
Conference_Location :
Aachen
Print_ISBN :
0-7803-4503-7
Type :
conf
DOI :
10.1109/IECON.1998.722851
Filename :
722851
Link To Document :
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