, .29.
.
.
.
(27.1) . , . , . ( ) , .
, . .
:
(t) = m * U (t) (29.1)
, :
φ(t) = m * U (t) (29.2)
(29.1) (29.2) - .
ω(t),
φ(t) :
φ(t) = (29.3)
φ(t), ω(t)
:
ω(t) = d / dt * φ(t) (29.4)
:
(29.1), (29.3):
φ(t) = *U *Cos t * dt =(m * U / ) *Sin t (29.5),
, ,29, .2
m * U / = φ
(29.5) , . , , . (), (),
. 29.1.
)
)
. 29.1. () ()
. 29.1:
U (t) = U (R/ )
, =RC RC<<1/
, , :
U (t) = U * * ;
ω(t) =m * *U * (29.6)
(29.6) (29.3), :
, ,29, .3
φ(t) = m *(U / ) * * (29.7)
(29.7) , .
, (29.4) (29.2) U (t) = U *Cos t :
(t) =d/dt*(m * U * Cos t) = m * U * Sin t (29.8)
m * U * = - () .
|
|
(29.8), . , , (. 29.1).
: U (t) = U */ / ( )
=RC >> 1/ , R >> 1/ . , :
U (t) = U * 1/ *RC = U / * (29.9)
(29.9) (29.8),
= m * (U / * )* = m * U (29.10)
m /
(29.10) , .29.1 .