I need to solve a system of 3 equations in the variable x1,x2,x3. Normaly I solve differential equations with ode solvers but in this system I have some problem with non linearity. I do not know how write the ode function that takes into account a term of a second order derivative of x2 in equation 1 or similar situations. I have a system of differential equation like that:
All the cofficients are known.
I do not know how write in the ode function for this system. Can somebody please explain or write an example of the ode function required to solve a non linear system like that? I would be grateful. I found a similar post where I wrote but I can not get the meaning.
Best regards Alessandro Antonini