how can I extract internal delay from a discrete system when I convert it to continuous with d2c?

how can I extract internal delay from a discrete system when I convert it to continuous with d2c?

Answer 1

[Arnaud Miege]

>> H = tf(2,[1 -0.95],0.1,'InputDelay',25)

Transfer function:
           2
z^(-25) * --------
        z - 0.95

Sampling time (seconds): 0.1

>> G = d2c(H)

Transfer function:
              20.52
exp(-2.5*s) * ----------
            s + 0.5129

>> G.InputDelay

ans =

    2.5000

>> G.OutputDelay

ans =

     0

[sadel]

No, I mean how can I get 'sysagain' the same with the 'sys'?

sys=tf(1,[1 1],'InputDelay',0.4)

sysd=c2d(sys,0.3)

sysagain=d2c(sysd)