Hi,
I need to find out the transfer function of a given system. I have the input /output relationship. But i dont know how to define derivatives in matlab. As in, I have one of the terms as (d/dt)*X .. How will i incorporate this in the tf[num,den].?? please help
Thanks
The derivative function is equivalent to multiplying by s. Similarly, the integration function is equivalent to dividing by s. So you can easily do it manually.
The tf function only accepts coefficients of the various s-powers.
transfer functions are in S or Z domain. integration or accumulation and derivation or differentiation are in TIME domain. go to "Signals and systems" by openheima nd read page 691 and 775
Hi,
If I am not mistaken, Matlab has a powerfull tool for derivatives. I haven't use it, but I remember reading for this in some forums. Check it also I think it has to do with object oriented tools from simulink or something. Of course you have to update your knowledge on Signals and Systems if you want to work with transfer functions. I learned this the hard way myself...
D.