Matlab GUIDE is a package for generating graphical user interface (GUI) scripts. Extracting Numerical Data from a Matlab uitable The table format was set to text using the Table Property Editor. The number of rows is equal to N. There are three columns of data: peak,… Read more
Please send me an Email if you are going to use this package. Also, you are welcome to participate in the Shock & Vibration courses. Thank you,Tom IrvineEmail: tom@irvinemail.org * * * License information: The software packages on the following links are freely placed in… Read more
When we spread the gospel of Jesus Christ, we receive forgiveness for our own sins. * * * The following verse applies to both the giver and receiver. Let him know, that he which converteth the sinner from the error of his way shall save… Read more
Matlab has very good plotting capabilities, but the required command syntax is somewhat awkward. Here is a hopefully user-friendly GUI for plotting XY curves from array data. The data must have two columns. Typical applications would be for a time history or frequency response function.… Read more
Gnuplot is a portable command-line driven graphing utility for Linux, OS/2, MS Windows, OSX, VMS, and many other platforms. The source code is copyrighted but freely distributed (i.e., you don’t have to pay for it). It was originally created to allow scientists and students to… Read more
Alas, the water drainage pipes in my home have developed a singing sound with a frequency of 400 Hz. This is slightly above a G note on the musical scale. The singing occurs when someone has finished taking a shower on the second floor. Here… Read more
Here is a project that my NASA colleagues have been working on: FSC_damper.pdf The original goal of the project was to use the Ares I second stage as a LOX damper to mitigate the first stage thrust oscillation. See also: http://blogs.nasa.gov/cm/blog/Constellation.blog/posts/post_1239311627391.html – Tom Irvine
The Craig-Bampton method is method for reducing the size of a finite element model, particularly where two or more subsystems are connected. It combines the motion of boundary points with modes of the subsystem assuming the boundary points are held fixed. Here is a tutorial… Read more
Here is a Matlab script for Doppler shift calculations: doppler.mHere is a related Newsletter article and sound files: June2003_NL.pdfK5LA.wavcno_wav* * *See also: Vibrationdata Acoustics Page* * *- Tom Irvine
Here is a Matlab script and its supporting function for identifying the frequencies and amplitudes for one or more sine functions. sinefind.zip Trial-and-error curve-fitting is used with some convergence techniques. Here is measured accelerometer data from a channel beam excited by an impulse force. channel.txt… Read more