HELP LAPLACE TRANSFORM!!!!
Hey. My exam is in a few hours so it'd be cool if someone could show me this. I can guarantee you it won't hinder my understanding by just "giving me the answer"... nothing would benefit me more at this point haha.
Anyway. I don't even know if it's possible but can you find a Laplace transform of this in terms of $\displaystyle Y(s)$:
$\displaystyle \mathcal L (y(t).sin(\omega t)) $
It's part of a bigger question where I have to find the transfer function of the differential equation:
$\displaystyle \ddot{x} + \zeta \omega_n \dot{x} + \omega_n^2 x = y(t)sin(\omega t) $
Assuming zero initial conditions: Hence my LHS is:
$\displaystyle (s^2 + \zeta \omega_n s + \omega_n^2)X(s) = \mathcal L (y(t).sin(\omega t) )$
The transfer function is given by the ratio of the frequency-domain input to the frequency-domain output. The input being $\displaystyle Y(s)$, and the output being $\displaystyle X(s)$.
In short I need to get $\displaystyle Y(s)$ on the RHS of that equation using the laplace transform integral I'd assume, and then manipulate the equation to get $\displaystyle \frac{X(s)}{Y(s)}$
(NOTE: $\displaystyle \omega_n, \omega, \zeta$ are all constants.[/tex]
Many thanks.