Dear there,
I am plotting the step response of a dynamic system with the transfer function matrix "tfm1" as below:
.
I use:
stepr = OutputResponse[tfm1, {UnitStep[t],0}, t];
Plot[Abs[stepr], {t, -2, 8}]
Then I get the plotted figure as below: 
.
Obviously around t = 6.3 seconds, the results become unstable and cannot come to the steady state. Is there any method to increase the numerical stability of the step response calculation? Thank you!
Kind regards,
Jin
