The advanced vibration analysis allows the diagnose of complex failures, relation between points, vibration modes and struture analysis. DigivibeMX M30 has tools to export to universal file formats such as UFF58
that may be used in other vibration analysis applications (such as ODS, Operating Deflection Shapes).
A spectrogram is a time-varying spectral representation (forming an image) that shows how the spectral density of a signal varies with time. The horizontal axis represents time, the vertical axis is frequency; a third dimension indicating the amplitude of a particular frequency at a particular time is represented by the colour intensity of each point in the image. It is commonly used to find critical and natural frequencies.
Cross Power Spectrum
Or spectral density is a mathematical function that shows the distribution of the power or energy in a specific frequency range.
Frequency Response Function (FRF)
It’s the quantitative measure of the output spectrum of a system or device in response to a specific stimulus, and it is used to characterize the system’s dynamics.
When interfering, two waves can add their amplitudes to create a greater amplitude wave than the first 2 (constructive interference) or subtract from each other to create a wave with less amplitude (destructive interference), depending on their relative phase. Two waves are said to be coherent if they have a constant relative phase.
The crest factor or peak-to-average ratio is a waveform measurement, calculated using the waveform peak amplitude divided by the waveform RMS value. It is used to measure the ratio of the peak power level to the time-averaged power level in an vibration signal.