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1. 
   Posted December 29, 2012 at 15:49 | Permalink

   Thanks for such nice toolbox for Fractional Modeling and Control. I have tried control and modeling both things in this toolbix. For fractional PID, results are amazings but I am facing problem with Modeling using Time domain. I have taken data from sytsem identification database(Online). Tried to identified system.
   Result Model:
   Fractional-order transfer function:
   1.0232
   —————————————————————————————————————
   0.21694s^{2.4269}+0.27524s^{2.1056}+0.80662s^{1.9569}+0.84564s^{1.0361}+0.47226s^{0.33057}+0.0099136s^{0.31993}

   Also, It is not tracking data. Please let me know that is there any fault from my side in applying this method?

   Or could you please share some examples of Identifiction?
   Thanking You,

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   • 
     Posted December 30, 2012 at 17:11 | Permalink

     Since you did not provide the identification dataset in question it is rather difficult to give you any suggestions. In FOMCON you can currently only identify a linear, time-invariant, single input, single output fractional-order model. If the system to be identified is clearly nonlinear and linearization cannot be applied, or the recorded output at time instance t=0 is not equal to zero (i.e. the zero initial state condition is not fulfilled), you will most likely not arrive at satisfactory results.

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