How do I get signals to repeat to infinity?

Good morning.

I have the following signals in the Signal Builder block in Simulink. These signals need to be timed as shown, and I need this 30 second sequence to repeat as long as the program is running. How can this be done?

Running Matlab R2012b.

Thanks.

Answer 1

[Swarooph]

I don't think this can be done using the Signal Builder block. It has only 3 options to set after final time. 'Hold final value', 'Set to Zero' or 'Extrapolate'. (File --> Simulation Options). You can instead try to use a 'Repeating Sequence' block.

• Export data from Signal Builder to Workspace. (File --> Export to Workspace). For this example keep the variable name as channels.
• Now your time data is specified by variables such as

channels(1).xData
channels(2).xData
          .
          .
          .
channels(n).xData

• Your signal data is specified by variables such as

channels(1).yData
channels(2).yData
      .
      .
      .
channels(n).yData

• Use a repeating sequence block and set Time Values and Output Values appropriately. You will have as many blocks as signals.

• If you are planning on doing something like this quite often, you could create a masked subsystem that takes the entire channels variable and redistribute it to several programmatically created Repeating Sequence blocks underneath.

[Michael]

Another simple suggestion: put an a sum Block after the signal builder block and add the result of the sum block with a delay of 30 seconds. Kinda like in my picture. (I only have 3 second delay since i need it repeated every 3 seconds)

[Michael]

[Abderrahmane GHIMOUZ]

Hi, is it possible to show me the parameters of the delay block you used ? Thank you in advance

Answer 2

[Rodrigo Prat]

Michael you are a genious