Thanks Tom.G,
At first the idea of using three of more switches seems to be a simple and practical approach to perhaps solving the problem.
But there are reliability and cost drawbacks to the use of limit switches, especially mechanical ones:
A switch not rated for extremely hazardous...
Isaac0427, thanks for your reconsideration.
And such??
Little off?
Scaling..there are no scales on the graphs.
In any case, thanks for sending the doc on how to do double integration.
If I integrate acceleration, I should get velocity(rate of change of distance over time), if I integrate...
Thanks again, Isaac0407
The attached doc is where I got the charts and double integral formula. Please see p. 23
I don't want to create any acceleration that causes an out of balance situation. I am trying to detect out of balance events using a MEMS device.
From the attached picture, it seems evident that the position resulting from the double integration of samples of accelerations results in a graph of linear displacement..is this correct?
But this approach requires I identify a point in my data stream where acceleration crosses over in...
I have now read several articles without getting any closer to modeling and solving the problem.
I have noticed that some appnotes show that MEMS sensors can clearly detect vibrational resonances in a OOB washing machine drum..but I already know that, I've washed clothes.
Some MEMS appnotes I...
I know the equations: v=gt, and if you integrate it again, you would get d=g(t^2)/2 the displacement.
Seems simple enough, but the demons are in the details:
Do I just sum the instantaneous g readings * dt, (they are changing over the fixed sampling intervals and fixed sampling interval)...
The citation below is quite a remarkable academic paper that doesn't fail, reveals all, showing extremely complicated equations, graphs and calculus I couldn't begin to try to understand until I get my phD:
From the first link Nidum suggested:
DEVELOPING AN UNDERSTANDING OF
WASHING MACHINE...
Nidum:
https://www.google.dk/search?q=use+of+a+MEMS+device+to+detect+imbalance+in+washing+machine&ie=utf-8&oe=utf-8&gws_rd=cr&ei=-1TbVuKtG6HP6AStn56IBA
even seems closer to the problem.
So I now know the equations: v=gt, and if you integrate it again, you would get d=g(t^2)/2 (displacement.)
Seems simple enough, but the demons are in the details:
Do I just sum the instantaneous g readings * dt, (they are changing over the fixed sampling intervals and fixed sampling interval)...
Thanks again, Isaac0427
Of course,
I get it, I hurriedly show g as a constant in my equation, but I meant if the g was a steady value/measured, so assumed to be unchanging(constant) during the interval in question, not a constant fixed value that would not be changed in any other instance of...
Thanks again Nidum!
I feel so dumb in suddenly realizing there exists is a wealth of info on this specific subject if only I googled my query correctly! It does take some time to understand a problem sufficiently to ask a viable question!
I also realize that I will likely discover that these...
Thanks Isaac0427,
This is a most useful start for me to approach understanding and creating a solution for this mechanical problem.
I don't quite understand how Dimensional Analysis helps..isn't this just about the actual units of measurement, or are you giving me a hint to look at a...
Thanks Nidum, I now have some link towards better working on this problem.
I realize that I didn't know what key words to query Google for some help,
I know that I will find links to some PhD physics level of elaborations of my problem of interest.
How will I be able to further get help from...
Note: Please don't read and bother to offer any more anecdotal or qualitative advice about how to wash clothes. I've already know how to wash clothes.
Please offer some quantitative, some explanation of the physical mechanics problem in terms of the math.