Motion Profiling

[Paul Copioli]

Jared,

Graph acceleration vs. time and you will see what I mean. Now I did just do that from memory while sitting in an airport so there is a chance I missed a step. When I get back to my notes I will make sure what I put in this post is correct.

Edit:
Yep, I missed a step. After filter 1 you are supposed to sum filter 1 and divide by the number of steps in filter 1 (in our case, 4) and use that as the input to filter 2. Everything else stays the same. I attached a new Excel file. The resolution of this example stinks so that is why you get the chop in the accel curve.


Paul

[Jared Russell]

Originally Posted by Paul Copioli

Jared,

Graph acceleration vs. time and you will see what I mean. Now I did just do that from memory while sitting in an airport so there is a chance I missed a step. When I get back to my notes I will make sure what I put in this post is correct.

Edit:
Yep, I missed a step. After filter 1 you are supposed to sum filter 1 and divide by the number of steps in filter 1 (in our case, 4) and use that as the input to filter 2. Everything else stays the same. I attached a new Excel file. The resolution of this example stinks so that is why you get the chop in the accel curve.


Paul

Makes a lot more sense - thanks!

[Jared Russell]

Paul:

I turned your spreadsheet into something that lets the user more easily play with the various inputs and have everything update properly (OFFSET is my new favorite spreadsheet function). Once I played around with it for a couple minutes, it made perfect intuitive sense. Thanks again.

(Recommend making a scatter plot of Time vs. Pos/Vel/Acc and then changing values to visualize what is happening)