Inter-Harmonic Detection Based on AR Model Spectral Estimation and Nonlinear Optimization

Huai Qing Zhang; Ran Liu; Zhi Hong Fu; Ke Zheng

doi:10.4028/www.scientific.net/AMR.605-607.2284

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 605-607Inter-Harmonic Detection Based on AR Model...

Inter-Harmonic Detection Based on AR Model Spectral Estimation and Nonlinear Optimization

Abstract:

In order to analyze inter-harmonic parameters accurately, a new detecting method was proposed on the basis of nonlinear optimization and AR modern spectral estimation. The AR model was used to produce a rough estimated value of harmonic parameters and then the signal model was set. By using the optimization algorithm which based on damped nonlinear least squares method and conjugate gradient method, the parameters can be estimated more accurately. The combined method not only solves the problem of inaccurate estimate by AR power spectrum analysis, but also solves the problem of how to set the signal model and to choose initial value. The simulation results show that in noisy environments, this method is effective and the accuracy which is 101 to 104 times higher than the interpolation Hanning window method.

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Periodical:

Advanced Materials Research (Volumes 605-607)

Pages:

2284-2288

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.605-607.2284

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Online since:

December 2012

Authors:

Huai Qing Zhang, Ran Liu, Zhi Hong Fu, Ke Zheng

Keywords:

AR Model, Combination Method, Inter-Harmonic Detection, Non-Linear Optimization

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