Best way to resample the output of a Simulink simulation with variable time step into a signal with a fixed sample time

4 次查看（过去 30 天）
Bill Tubbs
Bill Tubbs 2020-10-29
评论： Ameer Hamza 2020-10-30
I have a simulation model that runs with a variable timestep:
(I don't want to change this)
For the purpose of system identification it would be convenient to have the output signals sampled at a regular frequency.
This seems to work:
y_resampled = resample(simOut.POW,simOut.POW.Time)
According to the documentation, this resamples the values, simOut.POW, by linear interpolation onto a vector of uniformly spaced instants with the same endpoints and number of samples as simOut.POW.Time.
Not sure if it is the right way to do it or if there is a better function to use.

请先登录，再回答此问题。

采纳的回答

Ameer Hamza
Ameer Hamza 2020-10-29
No, resample() samples the signal at vector specified by simOut.POW.Time. So, in this case, it is not doing anything. I suggest using interp1()
t_equally_spaces = min(simOut.POW.Time):0.01:max(simOut.POW.Time);
y_resamples = interp1(simOut.POW.Time, simOut.POW.Data, t_equally_spaces)
  5 个评论
显示 3更早的评论

请先登录，再进行评论。

更多回答（0 个）

类别

在 Help Center 和 File Exchange 中查找有关 Multirate Signal Processing 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by