Impulse reponse from step response

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SUMMARY

The discussion centers on the relationship between step response and impulse response in control systems, specifically highlighting that the derivative of the step response yields the impulse response. A participant confirmed that applying the product rule during differentiation is essential to accurately derive the impulse response, particularly when dealing with terms that include the Heaviside step function, u(t), and the Dirac delta function, δ(t). The participant also noted that their calculations aligned with expected results when the product rule was utilized correctly.

PREREQUISITES
  • Understanding of step response and impulse response in control theory
  • Familiarity with differentiation techniques, including the product rule
  • Knowledge of Laplace transforms and their application in control systems
  • Basic concepts of Heaviside step function, u(t), and Dirac delta function, δ(t)
NEXT STEPS
  • Study the application of the product rule in differentiation of functions involving Heaviside and Dirac delta functions
  • Explore Laplace transforms and their role in converting time-domain functions to frequency-domain representations
  • Learn about the properties and applications of impulse response in system analysis
  • Review solved examples of step and impulse response problems for practical understanding
USEFUL FOR

Students and professionals in control systems, electrical engineering, and applied mathematics who are preparing for exams or seeking to deepen their understanding of system responses.

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Homework Statement


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Homework Equations


Derivative of step response is impulse response

The Attempt at a Solution


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[/B]
I marked A cause it matches the other coefficients. But where does 9 come from in the last term.
I tried with laplace and got the last term as 9. But how to get that in time domain with differentiation?
 

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Do you need to use the product rule when you differentiate these functions? I am not sure if you do - because it's been a long time since I've done these step and impulse response problems.
 
I would think that the product rule still applies here.
 
Oh yes. I get the right answer if I use the product rule. In solved examples there wasn't any u(t) or δ(t).
Thanks.
 

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