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2 DOF Vibrations system

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  1. Jun 8, 2017 #1
    1. The problem statement, all variables and given/known data
    I have the following system, I believe I've correctly established the equations. I'm having trouble building a working schematic bloc in Simulink.
    upload_2017-6-8_2-0-17.png

    2. Relevant equations
    upload_2017-6-8_2-7-5.png

    3. The attempt at a solution
    In the following equations Ktrain = Ka and Ctrain = Ca

    upload_2017-6-8_2-5-17.png
    I know my matrix should be symmetrical but isn't because of Y(S), is it okay to proceed in this fashion when the situation requires it?

    The resulting schematic bloc
    upload_2017-6-8_2-7-49.png

    I don't know how to use CaS+Ka in simulink so I attempted to simply multiply the 1st and second bloc. The result always end up being infinite to any input of Y(S)
     
  2. jcsd
  3. Jun 13, 2017 #2
    Thanks for the thread! This is an automated courtesy bump. Sorry you aren't generating responses at the moment. Do you have any further information, come to any new conclusions or is it possible to reword the post? The more details the better.
     
  4. Jun 13, 2017 #3
    Silly mistake the return block shouldn't have been negative
     
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