How to allow only sequences that have had the same value for 5 seconds (in Simulink)?

I have an input like this:

[2, 2, 2, 2, 3, 2, 2, 2, 3, 4, 4, 4, 4]

I want to suppress oscillation and only allow sequences that have had the same value for x seconds (e.g. 5). So that it outputs the above sequence like this:

[2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3]

Is there a way to do this using blocks in Simulink?

[Jonas]

The fifth sample of the input shows a '3', and it is ignored. Why would the output suddenly become '3' starting from the 7th sample? There have not been '3' in the input for 5 consecutive samples. Reading from what you want to do, it should ignore the two '3' in the input because you want to discard it as noise.

[black_cat]

Yes, that's my bad. Correct would be:

[2, 2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3]

[Mathieu NOE]

hi

why not make a simple comparison between the actual data and what is stored in a buffer of length 5 (take the mean of the buffer)

if the data is matching the running buffer mean value (within a given tolerance) use that actual data, if not take the previous sample (suing "memory" or "delay" block)

my 2 cents

alternative : use a low pass filter (FIR or IIR)

[Jonas]

I still don't know why it would output [2, 2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3]. There has not been five consecutive '3' in the input data. If you want the data to only jump when the value is 5 times the same consecutively, the output will be:

• Input: [2, 2, 2, 2, 3, 2, 2, 2, 3, 4, 4, 4, 4]
• Output: [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2]

[black_cat]

Yeah, because you assume that the consecutive number is coming from the input, but it is about the output.

Answer 1

[Jonas]

Using only blocks, I think this should do the trick:

[black_cat]

Thank you very much. This is the solution that solved my problem:

However, this only helps me with the values that occurred in the last 5 seconds. Does anyone know how can I apply this to the last 50 seconds without adding 40 more delay blocks?