This demonstration version has a simple built in model example:
= 1 -
(0) = 0
y = x
You can of course change these.
Model Input Section
Enter names of variables separated by commas. Variable names must consist of alphanumeric characters (a-z, 0-9), and the underscore character(_). Variable names are case sensitive. Certain words are reserved, and may not be used as variable names. These are:
x1, x, y
Enter parameters together with their value opposite, separated by either semi-colons or new lines. Parameters are "variables" whose value is constant, and thus have the same restrictions on what their names are composed of.
A=1 ; T1=1 T2 = 2
Remember that these must be separated by semicolons, and have only a single variable on the left hand side of the equals sign.
y = x*x
Differential variables are written as a.dt, (for
)where a is the dependant variable, and t the independant variable
x1.dt = (-A*y-x1)/T1 x.dt = (x1-x)/T2
Initial Conditions and Equations
An initial value is required for each ODE variable:
x=0 ; x1=1
Change as appropriate. These are only required for equation sets containing differential equations.
Maximum Time :
Last modified Sep 14 2001