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How to make the system evaluate output at interpolated time instants?
Posted 1 déc. 2017, 02:12 UTC−5
Electromagnetics, Low-Frequency Electromagnetics, General, LiveLink
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Hi , I am trying to study the response of a system under time dependant study and Electric Currents physics. I take my system input as an interpolation function defined as volt_fn(t). The independent variable t takes values 0,30,60,90 seconds and so on,corresponding to which the voltage varies. There are 400 such samples(thius it goes till 399*30=11970 seconds). I use 'piecewise cubic' for interpolation and 'constant' for extrapolation. Now, for the time dependant study, when i use point evaluation to find the potential at a point during the time instants i specify, I find that the program had been treating my samples as (0 to 399 seconds). {when i apply evaluation for range(0,1,11970) proper values are obtained till 400 samples(after which,due to constant extrapolation,same value is repeated); similarly when i apply evaluation for range(0,30,11970) values are obtained till ~13samples(11970/30)--(after which the last value repeats) }
How do I make the program understand that the data i gave is for every 30 seconds? I want to evaluate output at each second using the cubically interpolated data.
Thank you,
Hello Nora Joby
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