Материал: 1458
h(t)
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K T
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0 |
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+20 |
t 3T |
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L, |
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20lg K/T |
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0 |
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lg |
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0 = 1/T |
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= 1/K |
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,
/2
/4
lg
0
t
)
jV( )
0 +
0 |
K U( ) |
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T |
. 2.16. :) ; ) , ; )
T
x K.
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T |
dy |
y Kx . |
(2.98) |
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dt |
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W p |
K |
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(2.99) |
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Tp 1 |
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( . 2.17, ),
(2.98), , x(t) = 1(t)
t |
(2.100) |
h(t) K (1 e T ) . |
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( . 2.17, )
A( ) |
K |
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(2.101) |
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T 2 2 |
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1 |
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L 20 lg K 20 lg |
1 T 2 2 ; |
(2.102) |
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arctg(T ) . |
(2.103) |
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( . 2.17, ) -
, U( )
jV( ):
W j |
K |
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j |
KT |
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(2.104) |
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2 2 |
1 |
2 2 |
1 |
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T |
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T |
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. 2.17 .
L,
20lg K
0
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0
–/4
–/2
h(t) |
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K |
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0,632K
0 |
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t |
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T |
t 3T |
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jV( ) |
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– 20 |
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lg |
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K |
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0 = 1/T |
= K/T |
0 |
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U( ) |
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+ |
0 |
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lg |
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. 2.17. :) ; ) , ; )
46
-T1 T2 x K.
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T 2 |
d 2 y |
T |
dy |
y Kx . |
(2.105) |
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1 dt 2 |
2 |
dt |
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W ( p) |
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K |
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K |
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(2.106) |
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T 2 p2 |
T p 1 |
T 2 p2 |
2 T p 1 |
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1 |
2 |
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1 |
1 |
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( . 2.18, )
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2 2 |
e |
t |
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t arctg |
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(2.107) |
h(t) K 1 |
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sin |
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T2 |
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, |
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(2.108) |
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2T 2 |
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1 |
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4T 2 |
T 2 |
(2.109) |
1 |
2 . |
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2T 2 |
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1 |
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– ( )
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T2 |
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(2.110) |
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2T1 |
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, , < 1.
1,
, .
( . 2.18, )
A( ) |
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K |
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; |
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(2.111) |
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1 T 2 2 2 T 2 2 |
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1 |
2 |
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L 20 lg K 20 lg |
1 T 2 2 |
2 |
T 2 2 |
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(2.112) |
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1 |
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2 |
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T |
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arctg |
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2 |
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(2.113) |
1 |
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T 2 2 |
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1 |
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( . 2.18, ) -
, U( )
jV( ):
W j |
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K 1 T 2 2 |
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KT |
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1 |
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j |
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2 |
. (2.114) |
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1 |
T 2 2 |
T 2 2 |
1 |
T 2 2 |
T 2 2 |
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1 |
2 |
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1 |
2 |
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. 2.18 .
h(t) |
T1 < 2T2 |
) |
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K
L,
20lg K
0
,
0
–/2
–
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T1 2T2 |
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0 |
t |
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) |
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) |
0 
1 2 2
jV( )
-
– 40
lg |
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K |
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0= 1/T1 |
0 |
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U( ) |
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lg |
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0 |
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+ |
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. 2.18. :) ; ) , ; )
48
. ,
-
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-
( . . 5.3).
x K .
:
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y |
K |
dx |
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K |
. |
(2.115) |
T |
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dt T |
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W p K Tp 1 . |
(2.116) |
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, -
-
, ,
. |
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( . 2.19, ) |
, |
x(t) = 1(t) |
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h(t) K T (t) 1 . |
(2.117) |
( . 2.19, ) |
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A( ) K T 2 2 1 ; |
(2.118) |
L 20 lg K 20 lg T 2 2 1 ; |
(2.119) |
arctgT . |
(2.120) |
( . 2.19, ) -
, U( )
jV( ):
W j K jKT . |
(2.121) |
49