Simplifying Inverse Laplace Function

In summary, the function \frac{s^2RC+sL}{s^2RC+sL+R} can be simplified to 1-\frac{R}{s^2RC+sL+R} by dividing s^2RC+sL+R into s^2RC+sL. Completing the square in the denominator can further aid in simplification.
  • #1
polarmystery
19
0

Homework Statement



Any way to reduce this function for simplification? (Trying to find the reverse Laplace function) I found this function after doing a circuit analysis on a transmission line.

[tex] \frac{s^2RC+sL}{s^2RC+sL+R} [/tex]

Homework Equations



none

The Attempt at a Solution



I couldn't arrive at anything past this
 
Physics news on Phys.org
  • #2
Well, seeing "[itex]s^2RC+ sL[/itex]" in both numerator and denominator, the first thing I would do is divide [itex]s^2RC+ sL+ R[/itex] into [itex]s^2RC+ sL[/itex]. Obviously, it will go into it once with remainder [itex](s^2RC+ sL)- (s^2RC+ sL+ R)= -R[/itex].

That is
[tex]\frac{s^2RC+ sL}{s^2RC+ sL+ R}= 1-\frac{R}{s^2RC+ sL+ R}[/tex]

Now, if s is the variable, complete the square in the denominator.
 
  • #3
holy cow that was quick. Many thanks. I think that works out.
 

Related to Simplifying Inverse Laplace Function

1. What is an inverse Laplace function?

An inverse Laplace function is a mathematical operation that calculates the original function given its Laplace transform. It is denoted by the symbol f(t) and is used to solve differential equations in engineering and physics.

2. How do you simplify an inverse Laplace function?

To simplify an inverse Laplace function, you need to use the properties of Laplace transforms, such as linearity, shifting, and scaling. You can also use partial fraction decomposition and other algebraic techniques to simplify the function.

3. What are the common techniques for solving inverse Laplace functions?

The most commonly used techniques for solving inverse Laplace functions include using partial fraction decomposition, using the convolution theorem, and using the method of undetermined coefficients. It is important to choose the most appropriate technique based on the function and its properties.

4. How do you verify the solution of an inverse Laplace function?

To verify the solution of an inverse Laplace function, you can use various methods such as substituting the solution back into the original differential equation, using Laplace transform tables, or using a graphing calculator. It is important to check the solution to ensure it is correct.

5. Are there any shortcuts for simplifying inverse Laplace functions?

There are no shortcuts for simplifying inverse Laplace functions. It requires a good understanding of the properties of Laplace transforms and various solving techniques. However, with practice, you can become more efficient in solving these functions.

Similar threads

  • Calculus and Beyond Homework Help
Replies
8
Views
2K
  • Calculus and Beyond Homework Help
Replies
2
Views
1K
  • Calculus and Beyond Homework Help
Replies
3
Views
842
Replies
5
Views
1K
  • Calculus and Beyond Homework Help
Replies
1
Views
1K
  • Calculus and Beyond Homework Help
Replies
5
Views
2K
  • Calculus and Beyond Homework Help
Replies
2
Views
1K
  • Calculus and Beyond Homework Help
Replies
1
Views
1K
  • Calculus and Beyond Homework Help
Replies
5
Views
2K
Back
Top