LabVIEW System Identification Toolkit 4.0 Readme

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Primary Software: LabVIEW Toolkits>>System Identification Toolkit
Primary Software Version: 4.0
Primary Software Fixed Version: N/A
Secondary Software: N/A

Problem: I have not installed the LabVIEW System Identification Toolkit. Can I still access the readme files?

Solution: The LabVIEW System Identification Toolkit 4.0 readme file is attached below and also installs with the toolkit. The readme document provides an overview of the toolkit and describes any last-minute installation instructions.

This file contains information to introduce you to the LabVIEW System Identification Toolkit 4.0. This file also provides you with help resources you can use while working with this toolkit. The file contains the following information that you need to understand.

Overview

New Features and Changes

System Requirements

Installation Instructions

Overview

The System Identification Toolkit provides an assistant and a library of VIs for developing models of a system based on a large set of raw data. Both tools enable you to complete the entire system identification process, from analyzing the raw data to validating the identified model.

New Features and Changes

You can convert time-domain data into frequency-domain data by using the SI Estimate FRF VI. This VI estimates the frequency response function (FRF) of a system from the time-domain stimulus and response signals of the system.
You can estimate transfer function models and state-space models from frequency-domain data by using the SI Estimate Transfer Function Model from FRF VI and SI Estimate State-Space Model from FRF VI, respectively.
In the System Identification Toolkit 3.0.1 and earlier, the System Identification VIs are on the Addons palette. In the System Identification Toolkit 4.0, the System Identification VIs are on the Signal Processing palette.

System Requirements

The computer you are using must meet the following minimum system requirements to run the System Identification Toolkit:

Windows Vista/XP/2000
600 MB free disk space
LabVIEW 8.6 Full or Professional Development System

You can install the System Identification Assistant without installing LabVIEW 8.6. However, to convert projects created with the System Identification Assistant into LabVIEW block diagrams, you must have LabVIEW 8.6 installed.

Installation Instructions

If you need to install an earlier version of the System Identification Toolkit for an earlier version of LabVIEW on a computer that has the System Identification Toolkit 4.0 installed for LabVIEW 8.6, you must uninstall the System Identification Toolkit 4.0 and LabVIEW 8.6 before installing the earlier versions of the System Identification Toolkit and LabVIEW.

You can install all of your LabVIEW products—including LabVIEW and the System Identification Toolkit—using the LabVIEW 8.6 Platform DVDs. Refer to the LabVIEW DVD Installation Instructions or the LabVIEW Release Notes, which are available in your LabVIEW box, for more information about the LabVIEW Platform DVDs.

Complete the following steps to install the System Identification Toolkit for Windows from the LabVIEW System Identification Toolkit 4.0 installation CD.

Log on as an administrator or as a user with administrator privileges.
Insert the LabVIEW System Identification Toolkit 4.0 installation CD and follow the instructions that appear on the screen.
Activate your LabVIEW products using the NI License Manager.

Accessing the Help

Refer to the LabVIEW Help, accessible by selecting Help»Search the LabVIEW Help from the pull-down menu in LabVIEW, for conceptual information about using the System Identification Toolkit and information about the System Identification VIs.

Refer to the LabVIEW System Identification Toolkit Algorithm References manual for information about algorithms implemented in the System Identification Toolkit and their corresponding references. The LabVIEW System Identification Toolkit Algorithm References manual (SIreference.pdf) is located in the labview\manuals directory.

Refer to the LabVIEW SignalExpress Help, accessible by selecting Help»LabVIEW SignalExpress Help from the pull-down menu in the LabVIEW SignalExpress environment, for information about the System Identification Assistant. The LabVIEW SignalExpress Help includes reference information about the System Identification steps and a tutorial that helps you familiarize yourself with the System Identification Assistant.

Finding Examples

You can access the examples for the System Identification Toolkit by selecting Help»Find Examples to display the NI Example Finder and then navigating to the Toolkits and Modules»System Identification folder. You also can click the Find Examples link in the Examples section of the Getting Started window to display the NI Example Finder. You can modify an example VI to fit an application, or you can copy and paste from one or more examples into a VI that you create.

You also can find the examples for the System Identification Toolkit in the labview\examples\System Identification directory.

Example projects for the System Identification Assistant are located in the National Instruments\ExpressWorkbench\System Identification Assistant\Examples folder.

Refer to the National Instruments Web site at ni.com/info and enter the info code SYSID for more examples of using the System Identification Toolkit.

Known Issues

The following items are known issues in the LabVIEW System Identification Toolkit 4.0.

Because the default fonts on Windows Vista are different than the default fonts on previous versions of Windows, you might notice cosmetic issues, such as overlapping or truncated text strings, in VIs and LabVIEW dialog boxes. To correct this problem, change the theme of the operating system to Windows Classic in the Theme Settings dialog box and then restart LabVIEW. Select Start»Control Panel»Appearance and Personalization and click Change the theme to display the Theme Settings dialog box.
The Frequency-Domain Model Estimation Case Study topic in the LabVIEW Help contains two Bode plots of an example transfer function model. These Bode plots do not match the Bode plots that the Flexible Arm (Frequency Domain) VI generates.
You must specify the full file path in some of the steps of the exchanger in parts.wbp example project for the System Identification Assistant. If this example project contains relative file paths and you convert this project to a LabVIEW block diagram, the resulting LabVIEW code might not work correctly.

Bug Fix

The following item is the ID and title of a subset of issues fixed in the LabVIEW System Identification Toolkit 4.0. If you have a CAR ID, you can search this list to validate that the issue has been fixed. This is not an exhaustive list of issues fixed in the current version of the System Identification Toolkit.

Bug ID Fixed Issue

98464 When the recursive method is RLS in the Recursive Model Estimation VIs, the updated P matrix needs to be divided by the forgetting factor before outputting the result.

Note to Users: You must adjust the forgetting factor to achieve the same convergence rate in applications created with the System Identification Toolkit 3.0.1. or earlier. The same forgetting factor achieves an increased convergence rate, which might influence convergence stability.

Copyright

Under the copyright laws, this publication may not be reproduced or transmitted in any form, electronic or mechanical, including photocopying, recording, storing in an information retrieval system, or translating, in whole or in part, without the prior written consent of National Instruments Corporation.

Trademarks

National Instruments, NI, ni.com, and LabVIEW are trademarks of National Instruments Corporation. Refer to the Terms of Use section on ni.com/legal for more information about National Instruments trademarks.

Other product and company names mentioned herein are trademarks or trade names of their respective companies.

Patents

For patents covering the National Instruments products, refer to the appropriate location: Help»Patents in your software, the patents.txt file on your media, or ni.com/patents.

Related Links:

Attachments:

Report Date: 06/03/2008
Last Updated: 08/01/2008
Document ID: 4M2HHQLC

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