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The Drop Tower Experiment Data GUI (DTEgui) is an interactive MATLAB application to analyze data from the MSU-CAVS drop tower...


DTEgui is work in progress. For more information contact Alston Rush (alston@cavs.msstate.edu).

The Drop Tower

Describe the drop tower here...


The Head+Helmet Model

Describe the head and instrumentation inside here...


Data files

List of files, provide file fragment and descriptions here...

Rate (Hz)
No. Prezero Data Pts
No. Postzero Data Pts
Prezero (CNTS)
Precal (CNTS)
Signal to Noise Ratio
Postzero (CNTS)
Postcal (CNTS)
Datazero (CNTS)
Scale Factor (MV/CNT)
Scale Factor (EU/CNT)
Data Starts Here


Describe the analysis to be done on the data files here...


  1. Click menu item File | Load experiment to load the data for one trial of an experiment. Repeat for other trials of the same experiment.
  2. Click check boxes to select plots to display.
  3. Align data to some feature (max resultant, first threshold crossing, etc)
  4. Click menu item File | Write restart to save a record of everything (data, analysis, results) to a MATLAB .mat file
  5. If needed, go for a break
  6. If machine restarted while you were on break, open the application then click menu item File | Load restart to load previous work
  7. Add/delete data, align data, perform analyses; save another restart, etc.
  8. Click File | Quit to quit.

User interface controls

File menu


  • File | Load experiment

Open a directory selection dialog. Navigate to the directory containing data from an experiment expt. The directory should contain the files ASCII/expt001.FIL, ASCII/expt002.FIL and ASCII/expt003.FIL.

  • File | Load restart file

Open a file selection dialog for the name of a “restart” file to be loaded. A restart file is a record of the state of a previous session. This file is created by the menu item "File | Write restart file" during that session. Loading the restart file effectively resumes that session.

  • File | Write restart file

Open an input dialog for the name of a “restart” file to be created. This file will be a MATLAB .mat file which records the state of the session (the data loaded and the analyses performed, if any). This file may be loaded at some future time using the menu item "File | Load restart file" to resume the session. This feature is useful if the user gets tired and wishes to continue a session after getting some rest.

  • File | Send to printer

Open a print dialog.

  • File | Reset

Clear data from application memory.

  • File | Quit

Write the restart file LAST-SESSION-DTEv1-restart.mat, then quit the application.

Help menu


  • Help | Topics

Display the help file on a browser.

  • Help | License

Display the license file on a browser.

  • Help | About

Display the current version and the contact information of the developer/maintainer.


Select the experiment on focus. The controls for Start time, End time, Alignment event, Zoom limits will apply to this experiment.

Thresh edit box

Threshold for non-noisy data (G).

Noise edit box

Noisy data to include before threshold (sec).

Total edit box

Total data time including noise (sec).

Data check box

Plot data points for selected experiment.

Res check box

Plot resultant for selected dataset.

All check box

Plot all resultants shifted to the leftmost alignment event.

Ave check box

Plot average resultant, if all resultants are displayed (All is also checked).

SI check box

If checked, the Severity Index calculation results will be shown in the text display.

Calculate HIC checkbox and popup

If the Calculate HIC and the Ave' checkboxes are both checked, the HIC will be calculated for the interval limit specified by the popup. The progress of the optimization for the HIC calculation will be indicated by plots like the ones below. When the optimization completes, the text display and the plot will update to show the HIC interval endpoints and average acceleration.



Start time

The data point in an experiment that will used as the first "useful" observation. The point can be specified by entering its time occurrence, or its index in the array of readings, or by clicking on the slider. The time, index, slider position, and the "Data start" plot marker synchronize automatically.

End time

Automatically determined from Start time and Total. The time, index, slider position, and the "Data end" plot marker synchronize automatically.

Alignment event

The data point in an experiment that will used for alignment with other experiments. The event can be specified by entering its time occurrence in the secedit box, or its index in the array of readings in the index edit box, or by clicking on the slider. The sec, index, slider position, and the "Alignment event" plot marker synchronize automatically.

Zoom limits

Manually enter the time range (minimum time, maximum time) to plot in the Left and Right edit boxes, respectively. The plot updates automatically.

Click Use [Start-,End+] to automatically use values of Start time and End time for Left and Right, respectively. The plot updates automatically.

Personal tools

Material Models