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, , . . : Uc(t)=Uccos[wct+φ] U(t)=Ucos[wt+φ]. w=|w-w |:
U(t)=Ucos[wt+], wdw.
, (w≤w).
w0. w=0.
10-12-10-20 . .
c . , , , . fc<f, f.=f+f. f>f, f.=f-f. . 7. , . .
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(U U) :
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3. , U<<U .
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i=b0 + b1U + b2U2 + b3U3 +... + bkUk
u(t) = Umsin(wt). w, 2w, 3w,..., kw. w1 w2, mw1 + nw2, m, n - 0, 1, 2,...
B k w1, w2,..., wk mw1 + nw2 +... + qwk, m, n, q - 0, 1, 2,...
. wnk , |m| | n| :
mwnk + nw = wΔw/2
(w w - , Δw - ), . , , .
, m = l, n = 0, . , m=2, 3, 4,...; n = 1, . m n . , |m| +|n| = 2 m ≠ 0, n ≠ 0.
, . :
mw1 + nw2 +... + qwi + pwr = w Δw/2.
, , . , , :
w1 + w2 = w0, 2w1 - w2 = w0, 2w2 - w1 = w0.
.
. , - . , , . . .
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/ , . - .
i = b0 + b1U + b2U2 + b3U3 +...
U(t) = Uc(t) + Un(t) = Umc cos(wct) + Umn cos(wnt).
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. b < 0, . ,
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, b1, . , Umn Umc . , Umn >> Umc. , . .
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Un(t) = Umn [1 + mn cos(Ωnt)] cos(wnt).
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