:
2 <1 , 2to nxi wnx2 = , 22 1 =
= ',
-- 1 + 2 >, 2 zb 01 = wn.
(1 ) (7] cos conx] ( Unx2 cos 2/ |]:
(2coXi >2)
- ; () ; S, 5<) - .
1.3. - . - ( ) , :; SuBX+ S"
+ "3. 5 S"
.
- :
(15.35)
.
1 , , ,
Qv QIIX.
(1 .7):
, S"/S, .
(KneJrp < %.
(. 1.3) -. - / = -
- (15.35). , (Uc /), >.
, ,
:
/ = SUC .
= 0. () < 0,2.
- - (. 1.3). ' (") = ■ Uc (1 + mc cos Qct) cos , , :
|
|
() < <0,1-0,2. i , - -, . . , .
( ) - :
15.4. - -
-, (1 5.2). X (t) (t).
, , : -
X {t) > (/).
uc(t, ,) = A>cos(<cH ■()), (15.39)
| (/) X (/)
(15.40)
(0 = 1/1/ , () - .
0, . . (t) .
(15.8). - (15.39) (15.8) :
|> (15.40)
(|) ,
(15.41)
(15.40) (X,)
= ocXf
(15.42)
crj, : - . ■
(15.39) ,
/ (/, |)) (15.5):
(15.43)
(15.41), (15.42) , , -:
(15.44)
(15.45)
Kt = 2ka^A0/N0\ 2 = 2* AJ /5 / ; \1 - /?-.
-, (15.44), (15.45), . 15.8. £ (/) ( ).
,
\. , (15.44), , Ki RC -ne-
. , (15.45), , . . () () : /S - -, (|>,
|
|
), .
-. -, .
-
9 () = X () + (/), .
X () (/), -
.
,
9 (/) X (/).
(15.47)
(15.8). - (15.46) (15.8) :
(15.47)
(9) = Xt
(15.48)
(15.47) (X)
(15.49)
Og- ; .
/ (t, 9)
67 (t, 9)/6? , (15.43). (15.48), (15.49) , , -:
(15.51)
[ = 2k£ hAn/N; '2 = 2a\AJ /SyaA/,, ; 1/ /?-.
-, (15.50), (15.51), . 15.9. - (. . 15.8), - . - - , (), . , (, N0, 5), [29, 301 ~,
£ .
- ()-, . - . 15.10. , , - . , () . (), . () , , . -
. 15.9
- , , , , , (). - . . , .
|
|
() () - . , - . (. 7.5). ( ) , , (. 15.11), () - () -.
. 15.10 287
. 15.11
(/, X) (/) = (. , :
R (/)
t
; (/) \ X () dx
; (t) = Um(t )x
XCOS (t),y(t) = (t) (
.
. 15.12. R (/) 9 (/). , R (t) (. . 15.11),
. . - -- ' Icoc -f-ip (/)-f-+ 9 (t)]. , '. ,
" =0 + (0]. (15.54)
, (15.52), () = X (t) , X ().
0<7) , 9 (t).
. / , - () , . , , . . . X (t) . / / . (15 .53) , / => = |tp|c /tOc-
(15.55)
) .
/ ( ?> (/), (/)). (/) . (15.52) :
(0 <0''˄. (15.54),
(0 y(t)iAlt.
Gy (to) . ,
(15.56)
Gy (to) iV0 (/).
( /)
/ (15.55) / = 1 (15.57):
(15.58)
- A/ck/Fj, - ,
-
/ 2/.
(15.58) :
(15.59)
, () , FM, : (15.55) {'~) == 2,/2
|
|
(15.60)
Afmax/FM .
(15.59), (15.60) 2FB (2FM). -
, - / ^-2(1 + ) F,
(15.61)
. - G (/) = N 0/2 / 1/2/ < / < / + 1/2/ ( ) 1. (15.56)1 . FB (FM), . . , (. 15.13). / -.
-. - (15.52),
(15.62)
, , (15.54). ( ) (. . 15.11)
- (/) = 1 //- (15.62), 9 (/).
, . .
(15.63)
/.. (/). (15.56),
/ (15.63) (15.64) ■
I
<7 = ( 2) I (N0FM) / 2 FM.
5 = //? = '"2- (15.65)
(15.60) (15.65), , , . , , .
() / , 6(/) (t)/A0. / ()- , ' (15.59), (15.60),(15.65), / (<7) (qBX). . 15.14 . , qBX . <7 (qBX) ( ) , . qBX , qBX <7. , ()- .
()--. -
, . (. 15.15, , ), . (. 15.15, ), (. 15.15, ). (. 15.15, ), . , 2. (. 15.15, ) . , () . / (. . 15.13), : -
|
|
. .
15.5. ()-
(- ( ) . - - . . ()-, 2 , 20/ < -5, , . -- 15.3 -. 2/£2 > 1 ( ). , t0 2. 2 , Q,
= 1/ .