Vibration time measurements
Vibration time measurements
(OP)
I would like to take acceleration measurements on a moving vehicle in order to calculate an approriate PSD curve for an evaluation test. Does anyone have any experience in this area? Any good books to get?
Things I am looking for is
1) instrumentation to use
2) how to avoid aliasing, minimise noise and quantitization errors
3) Window to use when converting time data to a PSD
4) Any helpful MATLAB scripts
Thanks
Delfina
Things I am looking for is
1) instrumentation to use
2) how to avoid aliasing, minimise noise and quantitization errors
3) Window to use when converting time data to a PSD
4) Any helpful MATLAB scripts
Thanks
Delfina





RE: Vibration time measurements
Feel free to contact me to disuss adaption of one of the existing systems for your application.
Emmet Raftery
CDA Systems Ltd.
www.cdasys.com
(800)280-3972
RE: Vibration time measurements
RE: Vibration time measurements
Disclaimers:
1. I am not a salesman for IST
2. A number of other vendors offer similar devices
The IST units are available with internal or external accelerometers. The user can specify the anti-aliasing frequency as part of the order. The units are available for sale or rent.
IST also provides post-processing software. I prefer to download the data to ASCII text and use my own program for post-processing, however. This may include shock response spectra and power spectral densities depending on the characteristics of the data.
The P95/50 method can then be used to derive a envelope or test level if a number of power spectral density functions are calculated.
Tom Irvine
Email: tomirvine@aol.com
www.vibrationdata.com
RE: Vibration time measurements
An on-line free textbook which is pretty darned detailed:
www.dspguide.com
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