Calculating Settling time in Matlab, different from stepinfo

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Bart Nijman 2017-1-14

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https://ww2.mathworks.cn/matlabcentral/answers/320403-calculating-settling-time-in-matlab-different-from-stepinfo

评论： Bart Nijman 2017-1-16

I would like to compute the settling time of a signal y in Matlab. It should give the amount of time required before the signal reaches a steady state error y(t)-y_{ss} which is smaller than some absolute value x and stays smaller than x for all future times.

I already tried to use the Matlab function stepinfo, but this defines the value x as "a fraction 2% of their peak value for all future times" and that is not what i want.

Is there any way that i could adjust the Matlab function stepinfo, that i could code this myself or perhaps there is another function available that calculates the settling time in this way?

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Answer 1

Greg Dionne 2017-1-16

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https://ww2.mathworks.cn/matlabcentral/answers/320403-calculating-settling-time-in-matlab-different-from-stepinfo#answer_250775

Are you analyzing a step or a series of steps? Try settlingtime() if you have the Signal Processing Toolbox. That defines the termination condition as being within a given tolerance of the final state level over a specified minimum duration.