User manual for IDENT, a parametric and nonparametric linear systems identification package.

This document is intended to provide a first time user of I D E N T with tutorials on the usage of the program. The user should be familiar with the theoretical aspects of linear system identification. The Box and Jenkins (1976) Time Series Analysis is probably the best first reference. Following are explanations of each command (generated by IDENT), and examples of each command. I D E N T uses 2 types of input files. One type contains the input and output data to be analyzed. The other type contains commands with which the program may be run automatically. It has been the experience of this laboratory that the automatic mode of running I D E N T is the only one used. Usually, one wants to estimate and evaulate several models before choosing a model structure. On an LSI-11, the time involved in such an effort is considerable, so that modeling was often done in an overnight run of IDENT.