() 2- : -τ.
10.6, , 10.6, τ=0,01 .
10.6
:
τ = 0,01
10.7
ω = 400-1 ω = 100-1. φτ(400) = 400 ∙ 0,01 = 4 = 230.
ω < ω, , . τ .
, , τ << ω.
() . f[nT] z- f(z) :
- f(z) z;
- f(z) ;
- .
. z- F(z) z
(10.12)
, f(t) .
3. , 
10.8
z-
Z-
y(z)
Y(z) =y(0) z0 +y(1T)z-1 +y(2T)z-2+ y(3T)z-3+..+y(nT)z-n.
(10.12) z,
(0) = 0; () = 2; (2) = 1; (3) = 1,5; (4) = 1,25.
y[nT] 3.9 .
10.9
