, , .
h (t) , , 1(t) 1(t t 0) (. 14). . , , ().
. 14
k (t) , , d(t) d(t t 0) . , 1, 1, 1.
d(t) d(t) = d 1(t)/ dt. , : k (t) = h (0+)d(t) + dh (t)/ dt. . , h (t) = 0,7 e 100 t , k (t) = 0,7d(t) 70 e 100 t. .
. , : Y (s) = W (s) X (s), .. . , .
, . , 1(t) , 1(t) = 1/ s,
W (s) = L [ h (t)] / L [1(t)] = L [ h (t)] / (1/ s), L [ f (t)] f (t). , .. h (t) = L 1[ W (s)(1/ s)], L 1[ F (s)] F (s). , h (t) , W (s) / s.
d(t) W (s) = L [ k (t)] / L [d(t)] = L [ k (t)] / 1 = L [ k (t)]. , k (t) . : k (t) W (s). , ,
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W (j w) = W (s) s = j w. ( ), .
8. (. 15) : R = 50 , L 1 = L 2 = L = 125 ,
= 80 .
. 15
. é . Z = R + pL +
+ 1 / (pC) = 0 - : p 1,2 =
= d j wA2 = 100 j 200, . :
y (t) = (M oswA2 t + N sinwA2 t) e d t + y ; dy (t) / dt =
=[( M d + N wA2) os wA2 t (M wA2 + N d)sinwA2 t ] e d t + dy / dt, wA2 ; y .
uC (t) iC (t) = C duC (t) / dt, , , , , .
. : uC (0+) = 0 ( h (t) k (t)), iC (t) = iL (t) = i (t), iC (0+) = iL (0+) = 0. , t 0+: u 1 = R i (t) + (L 1 + L 2) i (t) / dt + uC (t), u 1 = 1(t) = 1 = onst,
uC () = uC = 1, iC () = iC = i () = 0.
M, N:
uC (0+) = M + uC (0+), iC (0+) = ( M d + N wA2) + iC (0+); : 0 = M + 1; 0 = M 100 + N 200; : M = 1, N = 0,5. uC (t) iC (t) = i (t): uC (t) = [os200 t -0,5sin200 t) e 100 t + 1] B, iC (t) = i (t) = [80106(100 - 100)Aos200 t (200 - 50) sin200 t)] e 100 t ] = 0,02
sin200 t) e 100 t A. ,
u 2 (t) = uC (t) + uL 2 (t), uL 2 (t) = uL (t) = Ldi (t) / dt = (0,5os200 t 0,25sin200 t) e 100 t B. u 2 (t) =
=(0,5os200 t 0,75sin200 t) e 100 t + 1 = [0,901sin(200 t + 33,69) e 100 t + 1] B.
: , u 2 (0+) = 0,901 sin (33,69) + 1 = 0,5, , u 2 (0+) = u (0+) + uL (0+) = 0 + 0,5 .
: hi (t) = i (t) / u 1(t) = i (t) / (1 B) = 0,02 sin200 t e 100 t ; ki (t) = hi (0+) d(t) + dhi (t) / dt = (4 os200 t 2 sin200 t) e 100 t /; hu 2 (t) =
= u 2(t) / u 1(t) = u 2 (t) / (1 B) = [0,901sin(200 t + 33,69) e 100 t + 1] /, ku 2 (t) = hu 2 (0+) d(t) + dhu 2 (t) / dt = 0,5d(t) + (180,2 os200 t + 90,1 sin200 t) e 100 t 1.