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X-Modal (Experimental Modal Analysis Software)

Contents of This Document

  


 

Overview

X-Modal III is an experimental modal analysis research software package that the University of Cincinnati, Structural Dynamics Research Lab (UC-SDRL) has, and continues to, develop in conjunction with a group of sponsoring companies and the UC-SDRL Research Software Consortium.  The primary function of this software package is to provide a flexible environment for acquiring and analyzing data acquired for the purpose of experimentally determining the modal parameters of a structure in research situations.  The flexible environment involves a unique data management structure as well as a user programming capability.  X-Modal III does acquire time, power spectra and frequency response function (FRF) data using an embedded data acquisition module (VACQ) for a limited set of specific hardware or, via a data through-put mode, using digitized time data in the Standard Data Format (SDF).  X-Modal III can utilize data acquired from any data acquisition system as long as the datacan be provided in Universal File (UF) format or a documented MATLAB data format.  X-Modal III provides a graphical user interface (GUI) in parallel with a command driven interface to provide users with any type of programmatic interaction desired.  X-Modal III utilizes MATLAB to provide user programmability (requires host MATLAB version) as well as to implement all the major modal parameter estimation algorithms documented in the literature.

The X-Modal III software is developed as MATLAB executable modules (programs) and is constantly checked and verified against analytical data.  The Matlab source scripts are no longer available to licensed users unless they are Members of the UC-SDRL Research Software Consortium.

Hardware Requirements (Minimum)

Currently, X-Modal III requires a personal computer with the following hardware specifications:

  • 4-8 Gb RAM or more  is recommended (more for large channel data acquisition or large FRF databases in modal parameter estimation)
  • 100 Gb Disc Memory  for data storage (only 1 Gb required for software and demo data, more is always better)
Software Requirements

The X-Modal III software package is written in the MATLAB programming language compatible with the graphical windows
computing environment with the following minimum software specifications:

  • WIN-7 or WIN-8 (64 bit), LINUX OS (TPUT data acquisition only) and Apple OS (TPUT data acquisition only)
  • A WIN-8 (64 bit) OS environment is the recommended and primary target for most users.
     
License Requirements

The UC-SDRL will grant a license to use UC-SDRL Research Software, including X-Modal III, that covers from one to all  computer workstations (PC or LINUX) located at a single site.  Licenses are available for Single User, Multiple User, Education, and Enterprise Site Users. Any license to use UC-SDRL Research Software is a license in perpetuity but does not include any warranty of the software, does not give permission to further distribute X-Modal III, and does not allow any further commercialization of X-Modal III without express legal consent.A license agreement from the University of Cincinnati,that includes the computer workstation(s) information where UC-SDRL Research Software will be executed, is required prior to distribution of any software.  The license agreement and all related information can be found at the UC-SDRL web site.  This is not a legal statement of the provisions of the license;  please consult the license agreement for details.

Distribution Fee

While there is no charge for the UC-SDRL Research Software license, there is an annual distribution/maintenance fee of US$1250 (Single & Education Site Users) to US$3750 (Multiple Users) to cover costs of support personnel and license code updates.  This fee covers an initial distribution and any major revisions for a period of one year to the user based upon the license.  Only one copy and form of media will be provided per license and/or site (provided via electronic download). Further updates/revisions will be made available, after the one year period, based upon a yearly distribution/maintenance fee.  Subsequent distribution/maintenance fees are subject to change.  Users are encouraged to prepay the distribution/maintenance fee for multiple years in order to assist in future development and/or to lock in their distribution/maintenance fee rate.

Distribution Deliverables and Media

The deliverables include the binary, executable MCR form of X-Modal III, designed to run on a specific computational engine (MCR version) of MATLAB and Encapsulated Post Script (EPS) or Portable Document Format (PDF) form of all documentation distributed electronically.  This includes downloadable video tutorials from the UC-SDRL Web Site.  The computational engine (MCR) version of MATLAB is included so the user will not need to have their own licensed version of MATLAB®.  This version does not allow user programming or access to the MATLAB command line.  Software is generally provided via electronic download over the Internet.    Software can be provided on limited forms of other media upon request, subject to additional fees.

Documentation:

The deliverables include the binary form of X-Modal III, designed to run on a specific computational engine (MCR version) of MATLAB® . and Encapsulated Post Script (EPS) or Portable Document Format (PDF) from of all documentation distributed electronically.  This includes downloadable video tutorials from the UC-SDRL Web Site.  The computational engine (MCR) version of MATLAB® is included so the user will not need to have their own licensed version of MATLAB.  This version does not allow user programming or access to the MATLAB command line.  Software is generally provided via electronic download over the Internet.  Software can be provided on limited forms of other media upon request.

Training:

Voice annotated video training is available on the UC-SDRL Web Site that includes numerous 10-20 minute video sessions that are designed to assist a user in using X-Modal III for the first time.  Installation assistance and/or minor questions can be answered via telephone, E-Mail, Skype, GoToMeeting or FAX.  If more detailed installation or training is required, research assistants from the UC-SDRL can be hired as consultants (approximately $500 per day plus expenses) to provide on-site assistance.

Current Capabilities

 Current X-Modal III capabilities are as follows:

  • Realtime animation with Graphical User Interface (GUI) control of all animations controls, including QuickTime movie export. Flexible data management utilizing data group and mode group workspace concepts pioneered in X-Modal 1.x.
  • SDOF modal parameter estimation featuring single mouse click interaction with the animation module.
  • MDOF modal parameter estimation utilizing the Unified Matrix Polynomial Approach (UMPA), which includes LSCE, PTD, ERA, PFD, RFP, and the latest Poly LSCF (PolyMAX) methods as well as Autonomous Modal Parameter estimation using the CSSAMI procedure.
  • Universal File Format, including Universal Binary File Format, compatibility with existing commercial software.
  • General data acquisition capabilites are provided within four acquisition modes.  1) MIMO FRF methods for multiple exciter inputs, 2) MRIT FRF methods for impact testing, 3) Generalized power spectra (auto and cross power spectra, input, output and input-output to support OMA and NAH applications) and 4) Generalized time capture subject to data acquisition memory limitations (no thruput to disc currently supported).  

For further information, please see X-Modal III - Data Acquisition document (PDF Information Sheets).

Availability

X-Modal III software is currently available via electronic download, pending signed license agreements and prepayment of the Maintenance/Distribution Fee.  Single User Licenses are available via a "click-thru" license agreement via the Internet.

 PDF Information Sheets

The following hotlinks will take you to PDF documents that summarize information about X-Modal.

X-Modal Information Sheet

X-Modal - Data Acquisition Information Sheet

Frequently Asked Questions

The following hotlink will take you to a PDF document of Frequently Asked Questions (FAQs) concerning various aspects of licensing UC-SDRL software and X-Modal specifically.

X-Modal Frequently Asked Questions

 

 


 

X-Modal Video Tutorials

Link to tutorial page

 

 


Sample X-Modal Help

Sample On-Line Help: Modal Parameter Estimation

 


 

Sample X-Modal II GUI Examples

 
Data Manager Module:

dmgr_hide_modules_show_aps.gif

dmgr_show_modules_show_apps.gif

 Modal Parameter Estimation Module:

mpe_pole_setup_freq_frf.gif

mpe_pole_results_consistency_cmif.gif

mpe_residue_setup_freq.gif

mpe_residue_results_frf.gif

mpe_datamgr.gif

Advanced CMIF Module:

amif_cmif_complex_tracked.gif

amif_cmif_efrf.gif

amif_emif.gif

amif_emif_efrf.gif

Computed Order Track Module:

cot_maps_1_freq_rpm_freq.gif

cot_maps_1_order_rpm_order.gif

 


For More Information:

For more information and/or details concerning the X-Modal software package, please contact:

X-Modal Program Coordinator
Structural Dynamics Research Laboratory
University of Cincinnati, P. O. Box 210072
Cincinnati, Ohio 45221-0072 U.S.A

email: sdrl-software@uc.edu