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VibraQuest -> Digital Filter Design


  Digital Filter Design is a package which provide users more advanced tools to perform signal analysis. Four filter design panels are shown below. You can use them to customize your filters. Each design panel displays the magnitude and phase responses of your filter. If your input parameters cannot be implemented, an error message will indicate the possible reason and prompt you to correct your input parameters. You can save the filtered signals as well as the filters so that you can apply the same filter to other channels or other data files. The Digital Filter Design package also display the power spectra of the raw data and the filtered data.

Classical Filter Design Panel

Filter type: Low pass, High pass, Band pass, Band stop

Design method: Butter worth, Cheyenne, Inverse Cheyenne, Elliptic, Kaiser Window, Adolph Window, Equi-Ripple FIR


The Classical Filter Design Panel allows user to design different filters using various filter types and methods with demanded passband/stopband frequencies and attenuations

Narrowband Filter Design Panel

The Narrowband Filter Design Panel uses the interpolated FIR and multirate digital filtering techniques to design the narrowband filters with significantly less computation complexity and filter order than the traditional FIR filters. In the meantime, the narrowband filters have linear phase response.


Narrowband filter design panel

Notch/Peak Filter Design Panel

The Notch/Peak Filter Design Panel allows you to suppress or keap the energy concentrated at a specific frequency. It is very useful to eliminate the 50 or 60 Hz powerline frequency. You also can use a peak filter to preserve the 1X component of a signal acquried on your rotating machinery.


Notch/Peak Filter Design Panel

Comb Filter Design Panel

Comb Filter Design Panel provides a powerful tool to suppress noise which appreas as harmonics. For example, your signals acquired in the field tests may be seriously contaminated by the 60 Hz line frequency and its harmonics, 120, 180, 240 ... Hz. The comb filter is then an ideal tool to filter them out.


Comb Filter Design Panel

 

 

 

 


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