what kind of filters are required to get a signal free of fluctuations

[pri2686]

Hi.....i am trying to remove fluctuations in pressure signals( from transducers) .... what kind of filter can i use?I am a mechanical engineer and i dont have much knowledge on the filters...

let me explain the whole problem in detail..... i have a current output pressure transducers... we use them in wind tunnel experiments to find out air-flow... the transducers display pressure values on a LCD ....... the values of pressure for a particular airflow..keep fluctuating... they do not give an exact single value...so my task is to get tat single value.... 

I have finished creating the pressure signals(from current signals)...but i do not know which filter to use here.... can anyone help me in this regard,.... i am attaching my vi here.... it has the waveform chart before filtering....(pressure values)

[Albert.Geven]

Hi

take a look at the median filter.

you have to put in an array of values and it will sort these values and takes the middle one.

So all outlyers are ignored and you even get a real measured signal.

If you really want flat results, thebest you can do is not to measure but to use a constant.