- #1
trojsi
- 19
- 0
Homework Statement
I have the following difference equation;
[itex]y[n] -1.7y[n-1] -0.72y[n-2]=x[n][/itex]
with aux conditions; [itex]y[-1]=1, y[-2]=-2[/itex]
input; [itex]x[n] = (0.7)^{n}u[n][/itex]
I used the recursive method to get 5 consecutive values of the impulse response of the system and also 5 consecutive values of the system response.
I need to determine the ZIR response analytically and therefore I obtained the general solution and after, the particular solution below;[itex]Gen. sol = \frac{10}{9}p^{n} - \frac{5}{4}q^{n}[/itex]
[itex]part. sol = \frac{-216}{35}(\frac{10}{9})^{n} - \frac{164}{35}(\frac{5}{4})^{n}[/itex]
I assume that if in the process I put the zero as input and used the initial conditions, the particular solution would be the ZIR.
Homework Equations
I also need to prove that ZSR + ZIR = system output response. The system response values can be obtained from the recursive method. Is the impulse response(recursive method) the same as the ZSR of the system?
I tried to obtain the ZSR analytically but I did not manage to find a good source. I would appreciate any help. thanks