Observe the output in Matlab workspace

dx/dt=4x-6y

dy/dt=3x-7y+f(t)

where, f(t)=2t+1.

[Steven Lord]

This sounds like a homework assignment. If it is, show us the code you've written to try to solve the problem and ask a specific question about where you're having difficulty and we may be able to provide some guidance.

If you aren't sure where to start because you're not familiar with how to create a Simulink model, I suggest you start with the Simulink Onramp tutorial (https://www.mathworks.com/support/learn-with-matlab-tutorials.html) to quickly learn the essentials of Simulink.

If you aren't sure where to start because you're not familiar with the mathematics you'll need to solve the problem, I recommend asking your professor and/or teaching assistant for help.

[Fangjun Jiang]

It is right. Drag a Clock block to connect to the Fcn block.

[Fangjun Jiang]

Click the Run button and let the simulation finish. Then in Command Window, check the value of out.task. The plot() command depends on settings of the To Workspace block. Please show the output of out.task

Answer 1

[Fangjun Jiang]

Assume "y" is "the output". Let's do it properly. In your Simulink model, double click the signal line out of the dy/dt Integrator block, and label it y. In your diagram, it is not clear whether y is a sigal label or just an annotation anywhere on the canvas.

Drag another To Workspace block and connect it to the line y. Double click, specify variable name as y and select "Timeseries" as the save format. After simulation, you can just do plot(out.y) to plot the curve.

Adding a Bus Creator block makes it hard for you. Other suggesions, don't use dy/dt, 4x-3y as the block name or signal label. They contain special characters or are invalid variable name.

[Fangjun Jiang]

If signals are not labeled, then it will show 'signal1', 'signal2'. etc.

It also depends on the save format, but you can always drill down the data to see

out.task.signal1

out.task.signal1.Time

out.task.signal1.Data

plot(out.task.signal1.Time, out.task.signal1.Data)

plot(out.task.signal1) would work if the save format is Timeseries.

[Fangjun Jiang]

The above is for the case of logging Mux output. In your case, out.task will contain out.task.x and out.task.y or out.task.signal1 and out.task.signal2 if signals are not labeled.