Fault Characteristic Extraction by Fractional Lower-Order Bispectrum Methods

Figure 9

The ARMA model and FLOARMA bispectrum estimations of the signal x(n) under Gaussian noise environment. (a) The ARMA(2, 6) model bispectrum estimation of the signal x(n). (b) The ARMA(2, 6) model bispectrum three-dimensional graph estimation of the signal x(n). (c) The FLOARMA(2, 6) model bispectrum estimation of the signal x(n). (d) The FLOARMA(2, 6) model bispectrum three-dimensional graph estimation of the signal x(n).

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