Getting zeros and poles for Laplace transform

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SUMMARY

This discussion focuses on the determination of zeros and poles for the Laplace transform of a damped cosine function. The user references a video that illustrates the relationship between the probing function and the impulse response, questioning the accuracy of the graphics presented, particularly regarding the B+B' and D graphics. The user asserts that the probing function should be the inverse of the impulse response for the sum to approach infinity and emphasizes that the real part of the exponential should align with the poles. The discussion highlights the importance of accurate graphical representation in understanding these concepts.

PREREQUISITES
  • Understanding of Laplace transforms and their applications
  • Familiarity with poles and zeros in control systems
  • Knowledge of damped cosine functions and their characteristics
  • Basic grasp of impulse response in signal processing
NEXT STEPS
  • Study the graphical representation of Laplace transforms in signal processing
  • Learn about the relationship between impulse response and probing functions
  • Explore the concept of poles and zeros in more depth using MATLAB or Python
  • Review the implications of damping on the behavior of cosine functions in the s-domain
USEFUL FOR

Students and professionals in electrical engineering, control systems engineers, and anyone involved in signal processing who seeks to deepen their understanding of Laplace transforms and their graphical interpretations.

bnich
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TL;DR
Getting zero's and poles for Laplace transform of damped cosine
I'm following the intuition behind getting the zero's and poles of a damped cosine function with this video


At around 11:50, he shows some graphics pertaining to multiplying the probing function with the impulse response, but the graphics don't seem correct.

For example, in the B+B' graphic, the probing function exactly equals the impulse response, but should the probing function be the inverse of the impulse response in order for the sum to be "just barely infinite" as depicted in the screenshot
laplace.png

Image source: http://www.dspguide.com/CH32.PDF

And for the D graphic, the complex part should be zero, but shouldn't the real part of the exponential be the same as where the poles are? Image below describes what I think it should be
Screenshot 2024-02-02 at 3.55.40 PM.png

image source: https://www.dummies.com/article/tec...s-understanding-poles-and-zeros-of-fs-166275/

Thanks for your time. I look forward to hearing some feedback!
 

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