SINEWAVE IN SCOPE (simscape)

Hello, I connected an ac voltage source to a voltage sensor and then trough a ps-to-simulink converter to a scope, in order to see the voltage graph. I use an ode23t solver and the only thing I get is a straight line on the x axis (with value ewual to 0). No sinewave looking voltage/ I set simulation time to 0.1. Why is this happening? Do I need to use different blocks? SCOPE is not appropriate for simscape and physical signals?

Thanks

Answer 1

[Doug Eastman]

To see the sinusoidal voltage variation you need to reduce the step size of the simulation. Go to Simulation -> Configuration Parameters and change the Max step size parameter to be smaller than 1/(2*frequency). For example if the AC frequency is 60 Hz, set the parameter to be 1/120 or 1/240.

[K E]

This blog entry may be helpful, http://blogs.mathworks.com/seth/2009/07/14/refining-the-output-of-a-simulation/

Answer 2

[Andreas]

I actually used a really low step like 1e-5 and it workd ok, since the sampling freq increased. I believe that refining is something like interpollating, so it justs recalculates intermediate steps (those that have not been actually sampled).

Any way thank you.