An on-line mechanical vibration acquisition and analysis system
Abstract
An interactive system of computer programs, known as VIBPAC, has been prepared for analog to digital conversion, manipulation and processing of mechanical vibration data. VIBPAC has been developed on a mini-computer that has 16 bit words and approximately 28K of available memory. The system can process steady state periodic, transient and random vibration signals in the time as well as frequency domains. At present, VIBPAC is limited to health monitoring of machinery but may be expanded to perform fault diagnosis of machinery and structures, analysis of shock signals and analysis of random response data. Analysis functions available are sample mean, sample variance, estimated autocorrelation coefficients, amplitude probability density, amplitude probability distribution and estimated spectral density. Use is made of a memory efficient FFT algorithm which is available as a subroutine from the VIBPAC function library. Command and control of the system is provided for the user through a video display and teletype. Analysis parameters may be altered during execution enabling statistically valid computations on a wide range of vibration signals to be performed. The entire processing package, along with the required computer software is contained on a single disc.
- Publication:
-
24th International Instrumentation Symposium
- Pub Date:
- 1978
- Bibcode:
- 1978isa..symp..541W
- Keywords:
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- Computer Programs;
- Data Systems;
- Structural Vibration;
- Vibration Measurement;
- Computer Storage Devices;
- Data Acquisition;
- Minicomputers;
- Power Spectra;
- Statistical Analysis;
- Instrumentation and Photography