Hello,

Take the equations of motion into the state space. Then define a function for the state space matrix. sth like this:

function solve_ode

[t,y] = ode45(@ model(t,y),[t0 t],[initial conditions]);

end

function p=model(t,y)

p = state space matrix;

end

Hi Mr. Khassetarash,

Thank you for your response. I got solution.

hi

i have worked with matlab alot but i found another software more userfrendly than matlab and more powerfull than it and it's Mathematica and i'm recomending it to u

Mr Ebrahimi,

Thank you. My knowledge about Mathematica  is limited. But, I will look at it when I have time.

Sincerely yours,