Assistance in checking transfer function

  • Thread starter incognitor
  • Start date
  • #1
Hi,

I am undertaking an undergrad design project and want to ensure I'm doing this correctly,

I have derived the ODE as shown below;

A*Y = M*X'' + (B+C)*X' + D*X
Where A,M,B,C,D are constants.

By taking the Laplace transform, I get;
A*Y(s) = M*s^2*X(s) + (B+C)*s*X(s) + D*X(s)

Therefore,
My transfer function becomes;

TF(s) = X(s)/Y(s) = the image of the transfer function below;
http://imageshack.us/a/img37/8820/95533304.jpg [Broken]


Feedback on this would be much appreciated.
 
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Answers and Replies

  • #2
It looks right, but I have 1 thing to ask
1) Is Input X and Y the output?

You should always have:

[itex] Q(s)X_{out}(s) = P(s)X_{in}(s) \; \Rightarrow \; H(s) = \frac{P(s)}{Q(s)} = \frac{X_{out}(s)}{X_{in}(s)} [/itex]
 

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