id_p.sq
SQ file id_p.sq provides the identification methods to obtain an ARX parametric model based on the measured input and output of an unknown system. The data can be retrieved from a file (typically created by an external real-time acquisition program) or generated by the SQ file.
For didactic purposes, synthetic data can be created for input
The parameters of the following model are identified:
where
Synthetic data are created from scratch. A dialog box allows to choose the number of samples.
The measurements are read from a text file, typically created by an acquisition program. This file should contain an array of two column (separated by spaces or tabulators) by n row (separated by carriage returns and/or line feeds). The first column corresponds to the system input, and the second column to the system output. Each row corresponds to a sample.
Not all samples are used for identifications. Remaining samples are useful for validating the model (cross-validation). The number of samples used for identification can also be set by manipulating the red vertical line in figure "Output".