[理工] [工數]-拉氏!!!~~~~~~~~~~~~~~~~
[u(t)-u(t-1)]t^2
拉氏轉換
2 1 2 1
= ---- --- - ---- ---e^-s
s^3 s s^3 s
2 2
= ----- - ----e^-s
s^4 s^4
這樣可行??
= e^-0s L[t^2] - e^-s L[t^2]
t=t-0 t = t+1
= e^-0s L[t^2] - e^-s L[(t+1)^2]
2 2 2 1
= -----e^-0s - [----- + ----- + ---]e^-s
s^3 s^3 s^2 s
--
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