Extracting Events from One Signal, applying Time to Another

Ce sujet contient 4 réponses, 2 participants et a été mis à jour pour la dernière fois par John Huxtable, le il y a 15 années et 1 mois.

Voir les messages de 5 - 1 à 5 (sur un total de 5)

Auteur

Messages
09.04.2010 à 19:57 #33764

John Huxtable
Participant

I have speed data from two fans. I use a formula to calculate the difference between them and event isolation to determine times when this difference is greater than +/- 30 rpm.

I then wish to use the associated time stamps to observe the vibration responses when the fan speed difference is greater than +/- 30 rpm.

The raw data are in separate signals but all have the same time base. I am using version 8.0.24 standard

09.04.2010 à 19:57 #33768

John Huxtable
Participant

I have speed data from two fans. I use a formula to calculate the difference between them and event isolation to determine times when this difference is greater than +/- 30 rpm.

I then wish to use the associated time stamps to observe the vibration responses when the fan speed difference is greater than +/- 30 rpm.

The raw data are in separate signals but all have the same time base. I am using version 8.0.24 standard

09.04.2010 à 20:29 #33765

Bernhard Kantz
Participant

For this you can use the index operator.

Example:
[code]
Dim idx = ValuesInInterval(Speed1 – Speed2, -30, 30, EVENT_INDEX + EVENT_COMPLEMENT)
Speed1.X[idx]
[/code]

support@weisang.com

09.04.2010 à 21:53 #33766

John Huxtable
Participant

I think I see how that gets me the time stamps in “speed1” but how do I apply this to “response1”?

10.04.2010 à 00:42 #33767

Bernhard Kantz
Participant

If you have a FPScript formula IDX which calculates the indices you can create an additional formula. This formula creates a signal with the y-values of the data set ‘response1’ and the x-values of ‘speed1’.
[code]
Signal(response1[IDX], speed1.X[IDX]
[/code]
support@weisang.com
Auteur

Messages

Voir les messages de 5 - 1 à 5 (sur un total de 5)

Vous devez être connecté pour répondre à ce sujet.