Integrating acceleration to get the displacement

65 次查看（过去 30 天）
Basem Deeb
Basem Deeb 2023-2-1
回答： Oskar Kilgus 2023-7-6
Hey
I am trying to integrate acceleration to get the displacement as you can see in the figure below. However, the velocity and displacement are showing exponential decrease. I have used you cumtrapz twice to get the displacement. Anybody know what's the issue here? I also don't want to use detrend to remove the polynomial part,
  3 个评论
显示 1更早的评论
Sulaymon Eshkabilov
Sulaymon Eshkabilov 2023-2-2
Can you share your numerical data to verify what you have showed here is accurate or not?
Sam Chak
Sam Chak 2023-2-2
Just want to add that in motion system, when performing the integrations, the initial velocity and the initial displacement are required to obtain an accurate solution. From your images, it appears that you assumed and .

请先登录，再进行评论。

请先登录，再回答此问题。

回答（2 个）

Ganapathi Subramanian
Hi Basem,
It is my understanding that you are trying to integrate acceleration to obtain velocity and displacement using ‘cumtrapz’ function. The velocity and displacement graph looks fine. It looks as exponentially decreasing because the acceleration graph is predominantly negative.
You can also add a high pass filter to the acceleration data for baseline correction. But be careful in selecting cut off frequency as higher value leads to loss in valuable information from data.
You can also refer the below file exchange to convert acceleration to velocity and displacement.
https://www.mathworks.com/matlabcentral/fileexchange/69516-convert-acceleration-data-to-velocity-and-displacement
Oskar Kilgus
Oskar Kilgus 2023-7-6
Hi Basem,
if you are sure that the displacement is not meaningfull (because you know the properties of the physical system observed), i would suggest to have a look into the frequency domain. Maybe you could work with a highpass filter to "detrend" your data from low-frequency disturbances as these may cause drifts in integrated signals.

类别

在 Help Center 和 File Exchange 中查找有关 Fluid Dynamics 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