Mathematical Problems in Engineering / 2019 / Article / Fig 17

Research Article

Applications of Fractional Lower Order Frequency Spectrum Technologies to Bearing Fault Analysis

Figure 17

Frequency spectrum estimations of the normal bearing signal employing fractional lower order frequency spectrum methods ((a) fractional lower order Blackman-Tukey method; (b) fractional lower order Periodogram method; (c) fractional lower order Welch covariation method; (d) fractional lower order AR model method; (e) fractional lower order ARMA model method).

(a)
(b)
(c)
(d)
(e)

We are committed to sharing findings related to COVID-19 as quickly and safely as possible. Any author submitting a COVID-19 paper should notify us at help@hindawi.com to ensure their research is fast-tracked and made available on a preprint server as soon as possible. We will be providing unlimited waivers of publication charges for accepted articles related to COVID-19. Sign up here as a reviewer to help fast-track new submissions.