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I got to know that most of the automobile manufactures are using PT1 Damping (concept like raising Linear/ PT1 failing time etc. ) algorithm in their sensor values.

For example :

  1. PT1 damping is used in ABS Sensor value to determine the speed.
  2. PT1 damping is used in thermometer sensor value to determine the temperature.

I know that sampling is required to get the average values from the sensor. But i don't understand why we required to use Damping algorithms (PT1 damping) for sensor values? If anybody has any reference of PT1 damping, Please suggest some useful links. So that i can understand more about that concept.

user2986042
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  • I haven't really heard the term "PT1", but a [quick search](https://infosys.beckhoff.com/english.php?content=../content/1033/tcplclibbabasic/html/TcPlcLibBABasic_PT1.htm&id=) says it's just a first-order low-pass, pretty much the simplest type of filter. It is straightforward to implement digitally as an IIR filter, like y[n] = (1-a)x[n] + (a)y[n-1] where a is calculated from the desired corner frequency. Being a first order LPF, it avoids numerical issues that can happen when implementing higher order digital filters. – Pete W Oct 26 '21 at 15:58

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