filtering of multiple harmonics

Dear all,

       I have the signal of vibration data, the fft plot of which shows multiple harmonics/frequencies. I am trying to filter out all except particular frequency harmonics, that i need for further processing. I have no idea of any filtering tools in matlab. Can someone refer me material i can use to write a code for the above purpose.

Thanks, Shravan.

Answer 1

Hi Shravan, If you have a signal processing tool box, you can use the FDA tool(filter design and analysis tool) to design a band bass filter by specifying the pass band frequency. (type fdatool to command window). You can export the filter ciefficients to workspace later.

Hi Gokcen, Thank you for the reply. Also, pls let me know that after designing the filter parameters, how do i use it on my data that needs to be filtered.

Thanks, Shravan.