How can I retrieve dY when using ode15i
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Zoé Cord'homme
am 18 Jul. 2022
Kommentiert: Zoé Cord'homme
am 18 Jul. 2022
Hello !
I have a program solving a DAE with ode15i, and the DAE looks like this :
where Y = (x, x1, dx) and therefore dY =(dx, dx1,d²x)
function res = f(t,Y,dY)
l0 = [0.09 0.2];
m_materiel = 265959;
course1 = l0(1) - Y(2);
coursetot = l0(1) + l0(2) - Y(1);
course2 = coursetot - course1;
forcemi79 = fmi79(course1,dY(2));
forcemi20 = fmi20(course2,Y(3)-dY(2));
res = [dY(1) - Y(3);
- forcemi20 + forcemi79;
dY(3) - 1/m_materiel*(forcemi20)];
Then, for post proccessing, I need to be able to plot dY(2) = dx1, but I don't understand how I can "retrieve" it after using ode15i like this :
[t,y] = ode15i(@f,tspan,y0,yp0)
Can you help ? thank you, have a great day !
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