Systems of Differential Equations

I have solved a system of differential equations in Matlab using the ODE45 solver. I would now like to put this system of differential equations into Simulink. Does anyone have any advice on how to do a block diagram for a system of differential equations? Here is my .m file for the system.

% System of Differential Equations
function dxdt = stika_electro(t,x)

global L R k_t k_b J_m B V_i F_f r_1

%Electromechanical Equations

dxdt(1)= x(2);
dxdt(2)= ((k_t)*x(3))/J_m -(F_f*r_1)/(J_m)-(B*x(2))/J_m;
dxdt(3)= ((-k_b)*x(2))/L-(R*x(3))/L+V_i/L;

dxdt=dxdt';

It is based off a system of equations for modeling DC Servomotors w/ a load.

Thanks!

Answer 1

[Guy Rouleau]

Seth published a good post on this topic:

http://blogs.mathworks.com/seth/2008/05/23/how-to-draw-odes-in-simulink/

[Joseph]

Thanks, have you seen any references where a system of differential equations is explained?

[Joseph]

Nevermind! I was able to figure it out from this. Building a block diagram in Simulink already requires the user to write as a system of differential equations in order to build the block diagram. Thanks!