) w, .
:
1 = 1 cos(wt + j1)
(2)
x2 = a2 cos(wt + j2),
1 2 - ; 1 2 - ; w - ; j1 j2 - .
. . , , 1 2 j1 j2 (.2).
. 2
1 2 (2). w . w, j=j1-j2 . 1 2 , . .2, =1+2. : =cos(wt+j).
, , 1 2 , , , , . j- .
.2, , :
2 = 12+ 22 - 212cos[p - (j2 - j1)]
= 12 + 22 + 212cos(j2 - j1) (3)
(3) , (j2 - j1) . (j2=j1), (3) , 1 2. (j2 - j1) 180 (.. ), : = |1 - 2|.
) , , , .
:
1 = sinw1t,
x2 = asinw2t.
, w1 w2. , :
=1+2=2cos [ (w1-w2)/2 ] t+sin [ (w1+w2)/2 ] t=
=2 cos [ (w1-w2)/2 ] t sin wt (4 )
, (.3) w1 -w2 w1 +w2, , w=(w1+w2)/2, .
. 3
(4) , . 3600, +1 -1. , , (4), . , , (4) 1800. , ( ) :
|
|
= 2p/(w1 - w2).
, w=2pn, :
= 2 p /2 p (n1- n2) = 1/(n1- n2). (5)
:
n=1/=n1-n2.