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initial conditions for zeror order hold

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craq on 24 Feb 2012
Edited: Negar on 24 Oct 2013
If the start time is not an integer multiple of the sample time for a zero order hold block in simulink, the output until the first sample is zero. When this is passed back to a system with faster samples (or even a scope), the results look very strange!
Why is it not possible for the zero order hold to a) have an 'initial conditions' parameter? b) take its first sample when the simulation starts?
The workaround is to start the simulation from t=0, but it would be nice if this wan't necessary.
  1 Comment
Kaustubha Govind
Kaustubha Govind on 24 Feb 2012
Craq: I don't know if there is a solution/workaround, but I would recommend reporting this to MathWorks Tech Support. Perhaps this could be an enhancement request.

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