[Scilab-users] Model ID of First order delay and Dead Time Process

[Serge Steer]

Le 10/03/2016 14:42, noguchi a écrit :
> Dear Mr.Serge,
>
>
> Thank you for your information.
>
> It works. Thanks.
>
> May I have your advise on my question No.2 also?
>
> 2. Model ID
> I would like to identify first or second order transfer function + dead time
> from step test data (SISO).
for dead time, it is quite easy, just count the number of initial 
samples equal to zero
for transfer function idetification you can use the time_id or sident 
functions
>
> Can we use subid and ss2tf?
> I tf2ss command doesn't work for following transfer function with dead time.
No, it is not yet possible to manipulate continuous time state space 
representation  with delay. It is much more complicated due to state delays.

>
>                              1
> h2d=exp(-5*s)*------------
>                                 2
>               1 + 2s + 1s
>
> -->tf2ss(h2d)
>   !--error 59
> 出力引数の数が間違っています.
> at line      14 of function tf2ss called by :
> tf2ss(h2d)
>
>
>
>
>
> --
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