I'm pretty sure the book is wrong on this:
Asked to find the initial and final values of
G(s) = 3s^3+2s+10 / s(s+2)^2(s+3)
initial-value theorem says that f(0)= lim(s->infinity) of sF(s) which comes out to 3 and I agree with that
however for the final-value theorem I disagree....
the book says its 0.833 but I believe it's 0.
final-value theorem says f(infinity)=lim(s->0) of sF(s)
If you divide 10/(2^2+3) thats 0.833, but that means you didnt multiply the numerator by s in the case... in other words:
sG(s) = 3s^4+2s^2+10s / s(s+2)^2(s+3)
You can see that as you take the limit of s approaching 0, the numerator will become 0 and the whole thing is 0...
agree?
Asked to find the initial and final values of
G(s) = 3s^3+2s+10 / s(s+2)^2(s+3)
initial-value theorem says that f(0)= lim(s->infinity) of sF(s) which comes out to 3 and I agree with that
however for the final-value theorem I disagree....
the book says its 0.833 but I believe it's 0.
final-value theorem says f(infinity)=lim(s->0) of sF(s)
If you divide 10/(2^2+3) thats 0.833, but that means you didnt multiply the numerator by s in the case... in other words:
sG(s) = 3s^4+2s^2+10s / s(s+2)^2(s+3)
You can see that as you take the limit of s approaching 0, the numerator will become 0 and the whole thing is 0...
agree?