FAQ: Are the percentages in the definition of rise time, overshoot measured from the final value, or the size of the input change?

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Posted by Murray 18:08, 11 September 2005 (PDT)
They are measured from the size of the input change. That is, for a system whose target has changed from 10 to 20, the rise time is the time to go from 10.5 to 19.5. If it overshoots to 21, that's 10% overshoot.