I dont have order analysis or sound and vibration toolkits. I need to do an analysis up to 10th order

[Intern Liz]

I am trying to do an order analysis on a set of vibration data. I don't have the sound and vibration toolkit or the order analysis software. Is it still possible to do this type of analysis?

[preston_johnson]

Order analysis without the order analysis tools is really only possible if the machine is running at a constant speed.  Simple track the running speed, then do an FFT, harmonics of running speed (the 10th harmonic is the 10th order) are what you are looking for. 

If the machine changes speed during normal operation, changing loads, changing functions, you will need to sample your data aligned to angular position, or use the gabor transform offline to track harmonics of rotational speed.  These are the key functions supplied in the Sound and Vibration Measurement Suite. 

Let us know how it works out.

[Intern Liz]

I am not completely sure what you are saying to do or that I was clear in what I am trying to do. I am trying to put together a program that will acquire data and then analyze it. Right now I am just using a set of old data I have to test my code as I work. The data I have was taken from an engine running at 1800 rpm with a 60 Hz rating. I want to be  able to do an fft on the data and then have it show me the orders of vibration which should be every 30 Hz. I want to be able to see up to 10 of these orders up to 300 Hz. We are most interested in the data the first 5 harmonics will show but would still like to see all 10. I tried doing as you suggested and took the fft and then used the harmonic analyazer. It doesnt look quite the way I expected. Am I expecting to much out of this or am I just doing it wrong?

[Intern Liz]

I am working on posting a copy of my code and the data I am using but I keep getting an error saying "You may include a limited set of HTML in your messages"