Vibration Analysis

Order analysis, time-synchronous averaging, envelope spectra, modal analysis, rainflow counting

Signal Processing Toolbox™ provides functions that let you study and characterize vibrations in mechanical systems. Use order analysis to analyze and visualize spectral content occurring in rotating machinery. Track and extract orders and their time-domain waveforms. Estimate the average spectrum of a signal as a function of order. Perform experimental modal analysis by estimating frequency-response functions, natural frequencies, damping ratios, and mode shapes. Plot stabilization diagrams. Remove noise coherently with time-synchronous averaging and analyze wear using envelope spectra. Generate high-cycle rainflow counts for fatigue analysis.

Functions

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Rotating Machinery

`envspectrum`	Envelope spectrum for machinery diagnosis
`orderspectrum`	Average spectrum versus order for vibration signal
`ordertrack`	Track and extract order magnitudes from vibration signal
`orderwaveform`	Extract time-domain order waveforms from vibration signal
`rpmfreqmap`	Frequency-RPM map for order analysis
`rpmordermap`	Order-RPM map for order analysis
`rpmtrack`	Track and extract RPM profile from vibration signal
`tachorpm`	Extract RPM signal from tachometer pulses
`tsa`	Time-synchronous信号平均

Modal Analysis

`modalfit`	Modal parameters from frequency-response functions
`modalfrf`	Frequency-response functions for modal analysis
`modalsd`	Generate stabilization diagram for modal analysis

Fatigue Analysis

rainflow Rainflow counts for fatigue analysis

Topics

Order Analysis of a Vibration Signal
Analyze vibrations in rotating machinery using order analysis.
Rolling Element Bearing Fault Diagnosis(Predictive Maintenance Toolbox)
Perform fault diagnosis of a rolling element bearing based on acceleration signals. Apply envelope spectrum analysis and spectral kurtosis to fault diagnosis on bearings.
Modal Analysis of Identified Models
Identify a state-space model of a system and use the model to compute frequency-response functions and modal parameters.
Modal Analysis of a Flexible Flying Wing Aircraft(System Identification Toolbox)
This example shows computation of bending modes of a flexible wing aircraft.

Featured Examples

Modal Analysis of a Simulated System and a Wind Turbine Blade

Estimate frequency-response functions and modal parameters from experimental data.

Open Script

Compute and Display Order-RPM Map

Display an order-RPM map as a waterfall plot and using built-in functionality.

Open Live Script

Vibration Analysis of Rotating Machinery

Analyze vibration signals from a gearbox using time-synchronous averaging and envelope spectra.

Open Live Script