, , .. .
j d , , .
, .
d = 900 j ( ) N.
d < 900 j
.
:
|d| < 900 |j|
(2):
(z = 900):
: t = t t = t
(1) :
A = A A = 3600 A
22. . . , ( ) , ( , ).
( 18-280, 45-480). 1800.
. ( ). ( ) , ( ). ( ), . ( ), ( ) .
C
T
V1
V2
V3
V4
M1
M2
M3
M4
(S) .
1/S=[1/T-1/(T⨁)]- , 1/ 1/⨁- .
23.. , , .
:
i , 0 ≤ i ≤ 1800. 0 ≤ i ≤ 900, , .
|
|
b, .. , ¡ b, 0 ≤ b ≤ 3600.
b i
. ω, .. b , 0 ≤ ω ≤ 3600.
a , .
e.
t 0.
24.. () .
.
, ( ) .
- .
() .
F 1 F 2
O
= = a
OF 1/ O = e
( )
( )
q = a (1 e)
Q = a (1 + e)
a = (q + Q)/2 ( )
F 1 P 1 P 2, - D t , F 1 P 3 P 4, D t .
.. P 1 P 2 P 3 P 4, , .
.. .
:
, ( ), , , - .
25. . . : , ( ).
:
1) a → ∞, ;
2) a = r, ,
.., v 0:
1) 0 < v 0 < vc, , ;
2) v 0 = vc, ;
3) vc < v 0 < vp, , ;
4) v 0 = vp, , vp ∞;
5) v 0 > vp = vh, .