@ Filtering accelerometer Data

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Mac Rodge
Mac Rodge 2015-7-8
回答： Star Strider 2015-7-8
I have recorded accelerations on vibration setup using accelerometer.
How to filter the low frequency accelerometer data? Can anybody provide me general code to filter data?
Thanks and regards, Mac.

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回答（2 个）

Star Strider
Star Strider 2015-7-8
I would first do an fft of your data to identify the approximate frequencies of your valid signal and where the high-frequency noise begins. Then use a bandpass filter with a low cutoff of about 1 Hz (to eliminate D-C offset and low-frequency baseline variations) and a high-frequency cutoff to eliminate the noise.
A general outline of filter design and implementation (using the Signal Processing Toolbox) is here.
bio lim
bio lim 2015-7-8
Here is an example of designing a low pass FIR filter (You can expand it into high pass as well). Moreover, video on creating and applying low pass filter can be found here. Also, signal smoothing example is here .

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