PicoScope 7 Software
Available on Windows, Mac and Linux
Smax function for shaft relative vibrations measurement
Smax function for shaft relative vibrations measurement
Hi!
I want to achieve measurement of Spp,max function, which is defined as Spp,max=sqrt(App^2+Bpp^2),where App and Bpp are the peak-to-peak values of time domain signals from input A and B, respectively.
I have a problem to obtain that measurement formula as sqrt((peak(A))^2+(peak(B))^2), but the "Next" button remains grayed out, so it is obvious that I have an error in that formula.
I would like to ask You to help me "construct" this formula!
Yours,
Josip
I want to achieve measurement of Spp,max function, which is defined as Spp,max=sqrt(App^2+Bpp^2),where App and Bpp are the peak-to-peak values of time domain signals from input A and B, respectively.
I have a problem to obtain that measurement formula as sqrt((peak(A))^2+(peak(B))^2), but the "Next" button remains grayed out, so it is obvious that I have an error in that formula.
I would like to ask You to help me "construct" this formula!
Yours,
Josip
Re: Smax function for shaft relative vibrations measurement
The mathematical processing behind the scenes does not allow the use of the peak function twice in the equation, which is why it remains red and you can't select next. I will start a discussion with the team as to whether it would be possible to change this.
In the meantime you could try replacing one of the peaks with (max - min) and see if that gives the results you need.
sqrt((peak(A))^2+(max(B)-min(B))^2)
In the meantime you could try replacing one of the peaks with (max - min) and see if that gives the results you need.
sqrt((peak(A))^2+(max(B)-min(B))^2)
Martyn
Technical Support Manager
Technical Support Manager
Re: Smax function for shaft relative vibrations measurement
Hello Martyn,
Thank You for Your reply.
So, As I found my initial idea is not viable, I tried the formula sqrt((max(A)-min(A))^2+(max(B)-min(B))^2) and also sqrt((max(A)-min(A))*(max(A)-min(A))+(max(B)-min(B))*(max(B)-min(B))). The software allows this formula, but gives the wrong value. For (max(A)-min(A))=573,376 and (max(B)-min(B))=608,0339, Smax gives a value of 75.032,1, which value is incorrect (obviously).
With regards,
Josip
Thank You for Your reply.
So, As I found my initial idea is not viable, I tried the formula sqrt((max(A)-min(A))^2+(max(B)-min(B))^2) and also sqrt((max(A)-min(A))*(max(A)-min(A))+(max(B)-min(B))*(max(B)-min(B))). The software allows this formula, but gives the wrong value. For (max(A)-min(A))=573,376 and (max(B)-min(B))=608,0339, Smax gives a value of 75.032,1, which value is incorrect (obviously).
With regards,
Josip
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