Forced Van der Pol... ODE help... Update function - Programmers Heaven

Howdy, Stranger!

It looks like you're new here. If you want to get involved, click one of these buttons!


Forced Van der Pol... ODE help... Update function

TheSlothTheSloth Posts: 1Member
Hi i've looked for help with this problem all over but found little to no help.

I'm simply trying to model a forced Van der Pol oscillator (ie instead of making diff equation = 0 now make it =cos(wt)). I need to update my function "vdp" 's 't' term as i run the code. I don't see how i can do this (ie i want the t term in the cos function to increment for each execution). Please any help would be greatly appreciated.

My code:
vdp file:

function dydt = vdp(t,y,Mu)
dydt =[y(2);Mu*(1-y(1)^2)*y(2)-y(1)+Mu*(sin(800*pi*t)+sin(900*pi*t))];
% End solvevdp.m

test file:
t = [1:100:1]
Mu= 1000;

ode= @(t,y) vdp(t,y,Mu);
[t,y]=ode23(ode,[0, 3000],[2;0]);

title('van der Pol Equation, mu = 1000')
axis([0 3000 -3 3])
ylabel('solution y')
Sign In or Register to comment.