Laplace Transform help

  • Thread starter GreenLRan
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  • #1
GreenLRan
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I have two subsystems that I'm trying to transform into the frequency domain, and trying to obtain the transfer function for each.

I have an equation (for system 1)

m[tex]\ddot{x}[/tex] -k(x2-x1) - b*[tex]\dot{x}[/tex]1 = f

Since this is for system 1, when I take the laplace transform of it, do i have x2 as a function of s (x2(s)) or do i treat x2 as a constant?

Thanks
 

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  • #2
LCKurtz
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I have two subsystems that I'm trying to transform into the frequency domain, and trying to obtain the transfer function for each.

I have an equation (for system 1)

m[tex]\ddot{x}[/tex] -k(x2-x1) - b*[tex]\dot{x}[/tex]1 = f

Since this is for system 1, when I take the laplace transform of it, do i have x2 as a function of s (x2(s)) or do i treat x2 as a constant?

Thanks

I suppose that first term should have a 1 subscript on the second derivative. You have to use x2(s) and you won't be able to solve for x1(s) or x2(s) without transforming both equations.
 

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