Solving a system of three second order coupled differential equation

Hi,

Please someone help me in solving these three coupled differential equation using ode45

I want to plot three things : in terms of time t

Please someone help me out!!

[James Tursa]

Have you looked at the documentation for ode45? There are vector examples that can get you started. In your case, you have three 2nd order equations, so your state vector will be 3*2 = 6 elements. The state vector will be [n1;n2;n3;n1dot;n2dot;n3dot], and you will need initial conditions for this 6-element state vector.

Answer 1

[J Chen]

Use as states and express the derivatives of the states as functions of the states, e.g., d/dt()=etc.