Simulink - Forward Euler Backward Euler

Hi,

I am using a discrete integrator in an enabled or in an enabled and triggered subsystem. If I use Forward Euler, the first integration step in the enabled and triggered subsystem is wrong, whereas in the triggered subsystem it is right. If I use backward Euler integration, it is right in both ways. Why does the forward Euler integration in a triggered and enabled subsystem yield a wrong result in the first step?

Thank you

Answer 1

[Guy Rouleau]

This really looks like you are affected by the following bug:

http://www.mathworks.com/support/bugreports/326058

Try setting the diagnostic "Underspecified initialization detection" to Simplified:

http://www.mathworks.com/help/toolbox/simulink/gui/bq8t6qh.html#brphwdw-1