This code demonstrate the example use of FOPDT (First-Order-Plus-Dead-Time) model identification. The Algorithm used in "FOPDT_fun" is available in the reference:
S. Sharma and P. K. Padhy, "A Novel Iterative System Identification and Modeling Scheme with Simultaneous Time-Delay and Rational Parameter Estimation," in IEEE Access,
vol. 8, pp. 64918-64931, 2020, doi: 10.1109/ACCESS.2020.2985132.
The FOPDT_fun uses the input, output and sample time for identification.