Inverse Laplace Transform Help

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SUMMARY

The discussion focuses on finding the unit impulse response for the operator D4 + I using the Laplace transform. The equation derived is W = 1 / (s4 + 1), which requires simplification to perform the inverse Laplace transform. Participants suggest using partial fractions to simplify W, and there is mention of converting the denominator to a more manageable form involving complex numbers. The key takeaway is the necessity of mastering inverse Laplace transforms and simplification techniques for effective problem-solving.

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  • Understanding of Laplace transforms
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  • Knowledge of complex numbers and their manipulation
  • Experience with partial fraction decomposition
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Students in engineering or mathematics, particularly those studying control systems or differential equations, will benefit from this discussion.

plexus0208
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Homework Statement


Find the unit impulse response for the operator D^4 + I, using the Laplace transform.

Homework Equations



The Attempt at a Solution


w^(4) + w = δ(t)

s^4W + W = 1

W = 1 / (s^4 +1)

Now, I need to find the inverse laplace transform of W. But I don't know how to simplify W. Should I use partial fractions? If so, how do I factor the denominator?

(Note: In the first line "^(4)" refers to the fourth derivative with respect to t.
 
Last edited:
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you could replace 1 with -i2 where i is the imaginary unit. But you may need to convert that to a better form in the final solution.
 

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