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[MUG] system of differential equations :(
| [MUG] system of differential equations :( |
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Author: Eugene Makarov
Posted: Thu, 5 Dec 2002 17:29:10 +0200
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>> From: Eugene Makarov "jekka"
Hello all
can anybody help me to solve a problem ?
When I had worked with Kalman filter
I got a system of differential equations:
------------------------------
all:=
{
diff(x1(t),t) = -1/4*x1(t)^2+2*x2(t)+200,
diff(x2(t),t) = x3(t)+(-25-1/4*x2(t))*x1(t)-12.5*x2(t)+220,
diff(x3(t),t) = 2*(-25-1/4*x2(t))*x2(t)-25.0*x3(t)+242+1/4*x2(t)^2,
x1(0) = 0,
x2(0) = 0,
x3(0) = 0
};
need:=
{x3(t),x1(t),x2(t)};
------------------------------
result1:= dsolve(all,need,numeric);
Maple is very fast :)
It counts it !! :)
result2:= dsolve(all,need);
Maple is thinks a lot but returns nothing :(
Can anybody help me to get correct analitic result (result2)?
If anybody had solved system like this (which version Maple did you
use?, what solving method etc.) ?
I use Maple 8 , but get nothing :(
In any case thx a lot :)
Good Luck
============================
name :Eugene Makarov
icq :38308262
phone :+380 50 3586472
"mailto:jekka"
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