A ramp block going backwards?

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Dani Tormo
Dani Tormo il 1 Mag 2014
Commentato: Dani Tormo il 5 Mag 2014
Hey people!
I am using a ramp block in Simulink driven into an m-function. I am checking the signal every time the m-function is executed and sometimes the ramp value is decreasing.
How can be this possible?
Many thanks.
  2 Commenti
Azzi Abdelmalek
Azzi Abdelmalek il 1 Mag 2014
How are you checking the signal in the m-function?
Dani Tormo
Dani Tormo il 5 Mag 2014
Saving the ramp value in a persistent variable.

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Guy Rouleau
Guy Rouleau il 2 Mag 2014
You are probably using a variable step solver. Variable step solvers often need to take steps backward to ensure they respect the specified tolerance.

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