Frequency Domain System Identification Toolbox for Matlab

Tools for frequency domain model identification and validation


·         Design of optimized periodic excitation signals (multisine, binary, three-level)

·         Identification of continuous-time or discrete-time systems with unknown fractional delay

·         Model order selection

·         Model validation, including simulation, calculation of residuals, and test of cost functions

·         Calculation of confidence intervals of amplitude/phase and poles/zeros

·         Model conversion to and from the Control System Toolbox and System Identification Toolbox objects


The Frequency Domain System Identification Toolbox (FDIDENT) provides specialized tools for identifying linear dynamic single-input/single-output (SISO) systems from time responses or measurements of the system's frequency response. Frequency domain methods support continuous-time modeling, which can be a powerful and highly accurate complement to the more commonly used discrete-time methods. The methods in the toolbox can be applied to problems such as the modeling of electronic, mechanical, and acoustical systems.
The Frequency Domain System Identification Toolbox is built entirely in MATLAB and all functions are available from the MATLAB command line or through an interactive interface.

FREE DOWNLOAD for non-profit use

Frequency Domain System Identification Toolbox_image                                                  
Identify the behavior of a robot arm with an estimate for 4 zeros and 6 poles.

The current version of the Toolbox is Version 4.0r, June 19, 2016, tested for MATLAB 8.6 (2015b).

Backward compatibility is maintained also with MATLAB 8.x, 7.x, 6.x, and 5.3: R11.
Subscribers will receive a new passcode from the distributor when they upgrade their Matlab. If you download a subscriber version, and have received no new passcode yet, please email us.

Related links and actions:

General Information
The MathWorks Third Party Products FDIDENT Page
Data Sheet of the Toolbox    Referring to the Toolbox     HTML document about the GUI     Papers on the Toolbox
Novelties in Version 4.0
Book on frequency domain system identification   Book of problems in frequency domain system identification
Frequently Asked Questions   Usage and Examples
Terms of Use
   Requesting download by an fdident subscriber

Mail questions or comments concerning distribution
Mail for technical support
Mail with remarks or suggestions

These pages were last edited: June 19, 2016.