The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
As incipient fault of rotating machinery is weak and interfered by noise, it is difficult for characteristic information determination and early classification. In this research, a new method is put forward on rolling element bearing (REB) fault diagnosis using improved reassigned wavelet scalogram according to time-frequency analysis. Real vibration signal collected from REB of rotating machinery...
This paper proposes a new method for estimating frequency and harmonic parameters in power system. The method is based on recursive wavelet transform and uses the wavelet transform coefficients of voltage and current signals. The complex magnitudes contain the phasor information of interest needed to estimate the frequency and selective harmonic components. This approach is capable of accurately estimating...
Frequency, amplitude and phase angle are three major parameters describing a stationary sinusoidal signal. In power system, many applications such as the state monitoring and protective relaying measure these parameters as performance indices or critical variables in the algorithm criteria respectively. This paper proposes a new method for estimating the power system frequency and phasors in real...
DC offset has significant effect on extracting fundamental frequency components. It directly impacts the accuracy of the fundamental frequency component based protective relaying algorithms. This paper proposes a novel method for estimating the fundamental phasor while eliminating the DC offset using improved recursive wavelet transform. The proposed approach converges to the actual value in less...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.