Fault Characteristic Extraction by Fractional Lower-Order Bispectrum Methods

Figure 8

The AR model and FLOAR bispectrum estimations of the signal x(n) under noise environment. (a) The AR model bispectrum estimation of the signal x(n). (b) The AR model bispectrum three-dimensional graph estimation of the signal x(n). (c) The FLOAR model bispectrum estimation of the signal x(n). (d) The FLOAR model bispectrum three-dimensional graph estimation of the signal x(n).

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