Simulink help

swraman

Hi,

I have a project due that has to be done in Simulink.

I am somewhat familiar with Simulink, but some things dont make sense to me.

First off, What determines the time step between each iteration? eg. when you have a clock in the model, what determines the change in time from one iteration to the next?

I remember working with a model once, and changing something in the model changed the sampling frequency for some reason, shich makes no sense to me.

Thanks

Raman

Cyrus

You can change the step size in the settings of the menu bar along with what kind of numeric solver it uses. i.e. ode45,ode23, etc.

swraman

So if I have a input array which is to be used in the system, then I have to make sure the values in the input array are spaced the same time apart as the step size I specify in Simulink Options?

swraman

How do I add an imput variable that is not a constant?

I have an array of values that I want the system to use, but I dont know how to get it to read the array one element at a time (each iteration I want it to take in one value from the array, and as it goes on it will read down the array).

Thanks

Cyrus

I'm not sure, I would google that or look on the mathworks website. It may well be that simulink just interpolates points if it needs to.

Cyrus

Again, a question for the mathworks forums.

swraman

thanks i was able to solve itl its jsut the "from workspace" block.