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Re: Using piecewiseconstant functions in ode Simulink
Posted:
Feb 23, 2013 11:58 PM


> I want to integrate the multiplication of a cosine with a > piecewiseconstant function (e.g. 1 from 0 to 1/1000, 1 from 1/1000 to > 2/1000, ...)
Why don't you use a square wave that changes from 1 to 1 and back every thousandths of a second?
> y at t=3/1000 should be 8.00487e4 if I solve analytically but Simulink > has 8.29766161000261e4 :( :(
That's not really a meaningful comparison. Simulink is, by its nature, an approximation, and its accuracy depends not just on the problem, but also the solver and the solver parameters being used.
Phil.



