(1.25)
(1.25) .
(1.25) , :
- : (1.26)
- : (1.27)
, - :
(1.28)
, A (ɷ), W(j ɷ ), P (ɷ) Q (ɷ) . , , :
- ɷ ( ɷ 0 ¥)?;
- j ɷ?
, () ɷ j ɷ. , , .
:
1. , , , ɷ 0 ¥.
, . :
P (w) =0 Þ -w4+2w2+9=0 Þ w=2,04, .. w5=2,04, .1.7;
Q (w) =0 Þ w(0,5w2+1,5) =0 Þ w=0, .. () w1=0.
P (ɷ) Q (j ɷ) ɷ =¥.
2. j (¥), ,
j (¥) =-90o (n-m), (1.29)
n m - p, , .
(.1.7).
3. , 5- (.1.4).
1.4
w | w 1=0 | w 2 | w 3 | w 4=2,04 | w 5 | w 6 | w 7 | w =¥ |
P (w) | 0 | 0 | ||||||
Q (w) | 0 | 0 | ||||||
A (w) | 0 | |||||||
(j w) | 0 | -90o | -180o |
- w. (1.26)...(1.28).
w2 w3 , 4- . , , 4- , .. j 30 ( 30, , , 30 10). , 0 2,04 ( !) j. 3010, ( - ) w2. 6010, w3. w. w5...w7 3- .
|
|
. P (w) Q (w ) W (wj)(.1.7), A (w) j (w) (.1.8).
(4.7) j , . - ARCTG (*), - -90 +90. , arctg, Q P . P>0, 1- 4- , P<0, 2- 3- . =0 90:
sign (Q)- Q.
.