Data Filtering

Question

Sangwoo 2011-6-16

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/9670-data-filtering

I finally have obtained force plate data with the use of the MATLAB data aquisition toolbox. I think the data contain a lot of noise. With that, I want to know how to filter the data.

Thank you

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Walter Roberson 2011-6-16

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/9670-data-filtering#answer_13288

You need a theoretical model of the noise in order to filter it properly. If you don't have a theoretical model, then I could say, "Just zero all of the data" and that would be a perfectly smooth solution that you wouldn't be able to discount.

3 个评论
显示 1更早的评论隐藏 1更早的评论

Walter Roberson 2011-6-16

For example, how much of the noise is in the item being measured, and how much of the noise is in the technology used for doing the measurements?

To toss some things out randomly: are the force measurements affected by frictive heating and if so how does that heat dissipate as a function of time and distance? Is the force being measured indirectly by optical fringing, and if so then does that imply you have quantum noise problems because of the use of CMOS or CCD detectors?