Filter Signal: High or Low Pass?

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When filtering a signal from an accelerometer to isolate a sudden stop, a low pass filter is generally not appropriate due to the high-frequency components involved. A high pass filter would eliminate constant acceleration signals, which could hinder detection of the stop. It is crucial to determine the frequency range of the signal of interest versus the noise. Understanding these frequency characteristics will help in making effective filtering decisions. Proper selection of the filter type is essential for accurate signal analysis.
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When a signal from an accelerometer is being filtered should a high or low pass filter be used? I am trying to isolate a particular instance in which we suddenly stopped but I am not sure wether a high or low pass would isolate this.
 
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You should know the frequency of the signal you are trying to isolate. . .
 
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trn09 said:
When a signal from an accelerometer is being filtered should a high or low pass filter be used? I am trying to isolate a particular instance in which we suddenly stopped but I am not sure wether a high or low pass would isolate this.

A constant acceleration would give you a DC signal, so a highpass would keep you from being able to sense that. The sudden stop will have high-frequency components, so a lowpass filter would not be appropriate.

As stated, you need to figure out what the frequency range of interest is, and what the frequency range of noise is, and make some tradeoffs.
 
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