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Presentation  Print Brochure
VibraQuest is an integrated data acquisition
and analysis solution package designed for diagnosing rotating/reciprocating
machinery malfunctions, structural dynamics analysis and acoustical analysis.
This novel software includes proprietary advanced signal processing algorithms
specially designed for diagnosing faults in drivetrain components such as gearbox,
bearings and rotor cracks. It integrates with XLRotor and MEScope to solve noise
and vibration problems, from experimental design to the final correction. .
Noise and Vibration Solutions
Noise and vibration measurements and analyses are increasingly performed
to enhance product quality; monitor and diagnosis rotating/reciprocating machinery performance;
design more efficient structures and products; and improve our quality of life.
In order to optimize the benefits, this process must be examined in a broad
sense. Most software packages on the market today do not address each phase of the process
needed to reach a complete solution. Typically, these phases are as follows:
- Project Definition and Experimental Design
- Data acquisition
- Data reduction and analysis
- Predictive model development
- Development of possible solutions and strategies
- Report generation
SpectraQuest’s VibraQuest starts the solution process by designing experiments.
Then it helps you create a plan to implement the experiments. It collects quality
data and performs in-depth analyses. VibraQuest also provides tools to quickly
examine the effects of test variables to reveal root causes and develop a predictive
model for arriving at solution strategies. Finally, the results can be used
to create reports, which can be exported in a variety of different formats
and shared with other engineers.
Features
and Benefits
Multi-channel data acquisition, analysis, and modeling system at an affordable price.
All-inclusive noise and vibration problem solution from definition to resolution.
Features time and spectrum analysis, statistical analysis, rotating/reciprocating machinery fault diagnosis, induction motor current signature analysis (MCSA),
order analysis, long duration data recording, modal testing, and acoustic analysis.
Automatic data reductions, analyses, and modeling to reveal root causes.
Export directly to ME’scope for modeling and modal analysis.
Simple intuitive user interface for fast and easy operation.
Rotating machinery and induction motor fault frequency calculations and display for quick diagnostics.
Experimental design with over thirty built-in templates to organize and document testing.
Real-time operating deflection shape (ODS) analysis using ME’scope.
Structured for developing predictive models to reveal root causes.
Simple procedure for project and user management.
Capability to incorporate non-linear sensor behavior.
Experimental Design and Project Management
Good
organization is critical to logical problem solving. It is important
to document a project in detail. If not done, there is a tendency to
lose information, repeat previous efforts, and misinterpret results.
SpectraQuest’s VibraQuest has been developed with scientific
testing in mind and configured to encourage you through a step-by-step
setup procedure to approach every project or test in an organized and
thorough manner. Easy to use wizards guide you through experimental
templates that define the test variables and parameters within your
project. You can create your own templates or use one of our 30+ built-in
templates for different experiments on structures and rotating machinery
studies. The entire test can be saved and used to automate the analyses
and develop a predictive model.
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Retains important information and helps to eliminate errors.
Built-in templates allow you to set up pre-stored parameters for specific tasks.
Parameters help organizing the tests and simplifying further automated analysis.
Organizes tests, assures consistency, and saves time. |
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Data acquisition and analysis are organized in a central control
panel. You can access any project or file for in-depth analysis
from this
screen. You can also edit data acquisition panels and test parameter
setups.
VibraQuest can host multiple users who are managed by an administrator.
Each user has a folder to hold projects, and each project can have
many individual tests and analysis reports. The administrator can
view, add, delete, and change a user's settings, such as password
and file
path. The administrator can also modify some system settings like
the sensor database.
Data
Acquisition
A
new test setup requires considerable time to enter. VibraQuest permits
saving setups in a project for quick retrieval for future testing.
Accurate data acquisition process is laborious and time consuming in
most vibration studies. VibraQuest uses a simple step-by-step wizard
to define the data acquisition parameters. Raw data are always saved
for future reference and analysis. Time and spectrum functions are
also available for real-time analysis.
Data acquisition
involves four steps:
Choose project and specify parameters.
Define measurement environment.
Define acquisition parameters.
Acquire, review, and save data. |
Specialized DAQ Setups:
Steady state test
Hammer/bump test
Accelerometer calibration
Order tracking and start-up/coast down test
Time synchronous averaging
Data streaming to a file
Internal signal generation to verify analysis function and system operation |
Acquire, Review, and Save:
VibraQuest is designed for quick data acquisition, review, and storage. You can
simultaneously review the results and save to a file, which can be exported
to a number of different formats. |
Sensors and Units:
VibraQuest allows you to setup the sensors to be used in data collection. Numerous
sensors and units are programmed for easy access, and you can add your own
sensors. You can even define a non-linear sensitivity curve using our polynomial
curve-fitting routine. Both the metric and English units are available.
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Data Analysis
Projects
frequently involve massive amounts of data that must be examined in
considerable detail in order to reach a conclusion. Most spectrum analyzers
provide the tools for analysis but fail to provide a means to assist
in drawing meaningful conclusions. Specifically, manual comparison
of numerous sets of variables is very time consuming and overwhelming.
Trends cannot be easily discerned through individual examination of
waveforms and spectra. In short, mathematical models relating the data
cannot be developed without downloading to different proprietary software.
VibraQuest overcomes this handicap, making it a powerful solutions
tool. The overall approach is as follows:
Rapidly skim through data and develop the appropriate analysis methodology.
Apply this methodology to analyze selected groups of data automatically.
Repeat the same procedure using different parameters to perform in-depth
analysis.
Information coming from each group can be used to observe trends
and develop models.
Time
Domain Analysis:
Time domain graphs show the raw data. A full screen
of data is often unintelligible. Zooming shows details.
The graphics have many options, including zooming, changing
scales and moving graph. Features include:
Waveform playback and analysis of selected data sets.
Detailed statistical analysis to include, average, min/max, RMS, variance,
skewness, kurtosis.
Comparison analysis among unlimited wave forms.
Comparison analysis among unlimited data sets (channels).
Waveform power and correlation functions.
Advanced cursoring to identify spikes with fault sets. |
Frequency
Domain Analysis:
FFT may be applied to individual data blocks or averaged. Data can
be displayed to see the variation from block-to-block. You can
select linear, logarithmic, or dB amplitude scales. A variety of
averages are available including RMS, vector, sum and difference,
and exponential. Any channel can serve as a reference for transfer
function analysis. There are nine window options available to enhance
the data analysis. The data blocks can be resized to examine the
results with different spectral resolutions. |
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Dynamic
Signal Analysis
VibraQuest
provides tools for a comprehensive dynamic signal analysis for structural
problems, rotating machinery analysis, induction motor analysis, and
general noise and vibration solutions. Data can be analyzed with the
ultra-high resolution of 102.4 k spectral lines. In-depth analysis
can be performed using time-synchronous averaging technique. Rotating
machinery can be analyzed using the built-in fault frequency calculators.
The results can be displayed in a variety of ways: one, two, four,
and eight graph formats. A comprehensive waterfall for three-dimensional
visualization is available. Extensive cursoring capabilities are also
available, which include two active cursors with delta values and a
truly dynamic harmonics and sideband cursors. Data can be viewed using
a polar plot, which plots the magnitude and phase angle of selected
order of harmonics. Data blocks can be selected to show the transition,
and slow-roll compensation is available for balancing and other applications.
All of the data blocks are available for analysis. The user can review
and delete any outlying data blocks. Averaging can be performed
on any data block(s). Extensive averaging is available; data can
be displayed in linear, log, and dB scales. Data from different
files can be compared for detailed analysis and trending.
VibraQuest provides the necessary tools for information extraction
and data interpretation. The comprehensive analysis panel gives you
total freedom and convenience in parameter selection, cursor operation,
and data manipulation. You can select any channel or data block to
feed into the desired function. Multiple plots or graphs can be used
to compare between different files, channels, or data blocks.
Analysis functions:
Auto power spectrum
Cross power spectrum
Power spectral density
Amplitude spectral density
Frequency response
Impulse response
Coherence
Bode plot
Polar plot
Nyquest plot
Orbit plot
Waterfall plot
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Statistical functions:
Mean
RMS
Standard deviation
Variance
Kurtosis
Median
Mode
Skewness
Covariance
Correlation
MSE
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The conventional digital signal processing is based on equally
spaced spectral bins. A representation of actual signal is
prone to errors.
The errors can distort both the frequency and time domain data.
In machinery analysis or modal testing, it is often required
to estimate
true spectral content of the signal. It is virtually impossible
to sample to exactly represent the frequencies present in
a real signal.
We have developed a proprietary algorithm to determine exact amplitude
and frequency of the signals. This procedure enables you to perform
more accurate fault diagnosis and natural frequency estimation.
VibraQuest provides a variety of cursors for in-depth data analysis.
Available cursors include: single, double, delta, harmonic, and sideband.
You can apply a true peak estimation algorithm to any of the spectral
peaks. This is especially useful for harmonics and sideband analysis.
In VibraQuest, you can display over thirty harmonic and sideband
cursors. The values of the frequencies and amplitude are displayed
in a table which can be exported to MS Excel for report generation.
Hammer test is an important tool for obtaining structural dynamic
parameters, such as resonance, frequencies, and mode shapes. In order
to extract these parameters accurately, it is important to obtain
reliable data in the hammer test. You have to be careful about double
hammer, damping in exponential window of the hammer channel, and
overload. VibraQuest provides tools for setting up and automatically
detecting these parameters. You can reject double-hit data while
averaging the hammer test results.
Acoustic
Analysis
This
module is a simple but powerful tool to analyze acoustic signals. It
includes full and fractional octave functions with linear, A, B, and
C weighting options. It also provides the capability to measure the
sound levels. You can combine different sound level measurements and
use them simultaneously.
Data can be averaged in three different modes: linear, exponential,
and peak. The exponential averaging supports slow, fast, impulse, and
user-defined modes for tracking different sound pressures and time
varying acoustic signals.
Fractional-octave analysis is a widely used technique for analyzing
audio and acoustic signals. There are many options available for selecting
bandwidth and filter banks, filter settling times, and averaging for
in-depth analysis. Both the ANSI and IEC standards are available for
octave analysis. Results can be displayed in a variety of ways.
Features & Benefits:
Full, 1/3, 1/6, 1/12, or 1/24 octave spectrum
A-, B-, C- or flat weighting options
Selectable display bands
Selectable averaging modes of Linear, Exponential, Equal confidence, and Peak hold
Band power table
Simple, cost-effective acoustic analysis functions
Related acoustic signals to vibration problems
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Reporting
VibraQuest
provides a built-in feature to create customized reports and export
them to various programs, such as Microsoft Word, Excel, and HTML format.
The reports can be created simultaneously while analyzing the data
to save time and maintain the continuity of the analysis. Reports can
be saved for future reference. This feature is available for all the
modules of VibraQuest.
VibraQuest comes in two variants: Lite and Pro. VibraQuest Lite
provides all the functions for basic data acquisition and analysis,
whereas VibraQuest Pro adds impulse data acquisition and additional,
more advanced data analysis functions.
VibraQuest Lite:
Multi-channel data acquisition and analysis system.
Powerful signal processing and data presentations of time waveform, FFT spectrum, and frequency response function.
Hanning, flat top and Kaiser-Bessel window functions
Linear, log or dB scale.
Magnitude, phase, real, or imaginary FRF.
Two active cursors with delta values.
Data statistics (mean, median, RMS, deviation, variance, correlation, covariance, etc)
Two graphs can be used to compare between different files or channels.
Simple project management, including experimental design with over thirty built-in templates to organize and document testing.
User defined project and test templates for repetitive experiments.
Capability to incorporate user-defined non-linear sensor behavior.
VibraQuest Pro adds:
Impulse and hammer test data acquisition.
Polar, Bode, Nyquist, orbit and waterfall plots.
Cross power spectrum, coherence, and impulse response signal analysis.
Additional window functions (Hamming, Blackman-Harris, exact Blackman, Blackman, 4 term Blackman, 7 term Blackman, force, and exponential).
Octave analysis, 1 to 1/24 octave, linear, A, B, C weighting.
Harmonics and sideband cursors.
Up to eight graphs can be used to compare between different files or channels.
Digital filtering.
Multiple user management.
Data import and export, including ME’scope for modeling and modal analysis.
Data reporting.
For more advance analyses, a choice five modules can be added
to VibraQuest Pro.
Induction Motor Fault Diagnosis
Induction motors are the mostly used electrical driven system. Motor current
signature analysis (MCSA) is a useful analysis and condition monitoring technique
for the health of induction motors. With the Induction Motor Fault Diagnosis
for VibraQuest, you can perform fault frequency calculation for diagnose problems,
such as broken rotor bars, turn-to-turn shorts due to insulation breakdown, single
phasing or loss of one phase, phase imbalance, both the static and dynamic eccentricity,
and bearing defects. MCSA can detect these problems at an early stage and avoid
consequent damage and catastrophic failure of the motor.
MCSA is the most widely used technique to analyze and monitor the health of induction
motors. The Induction Motor Diagnosis module for VibraQuest provides five types
of induction motor defects: broken rotor bar, stator short frequencies, static
eccentricity frequencies, dynamic eccentricity frequencies, and mechanical influence
frequencies. A graphical rendition of the fault with a detailed description is
provided as well. Due to the complexity of the loading on induction motors, analysis
is not often easy and the severity of defects is difficult to determine. This
module also provides advanced signal processing tools such as demodulation and
cepstrum analyses for detecting malfunctions. Using the calculation templates,
you can select the fault and display the fault frequencies an the spectra. Data
can be viewed and exported in a variety formats. The software also allows you
to compare motor current with vibration spectra.
| Features
Automatic machine fault frequency identification and spectrum mapping
Choice of bearing, gearbox, fan, belt, pump, and user-defined frequencies
Available gearbox types: two-element, four-element, epicyclic gearbox
(with Planetary, Star, and Solar configuration)
Enveloping function for fault detection of rolling element and gearbox
Cepstrum function for gearbox analysis
Ultra-high resolution with up to 100,000 line FFT
Illustrated explanation of selected frequencies
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Benefits
Built-in template for calculating fault frequencies caused by various
sources
Excellent tool for diagnosis of local faults in rolling element bearings,
gearbox, and turbine blades
Insight of operating machines without shutting them down
Designed for all four types of bearing faults for any particular bearing:
BPFO, BPFI, BFF, and FTF
Identification of vibration signatures of a machine
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Envelope
analysis
Airgap eccentricity, broken rotor bars, bearing damages, and time-varying load
all cause sidebands in the current spectrum. Envelope analysis is a useful tool
to detect these characteristic frequencies. The envelope analysis function in
VibraQuest is based on an innovatively improved Hilbert transform method. This
improved demodulation method attenuates the influences from high frequency contents
and makes the envelope frequency easier to be identified.
Cepstrum
analysis
Cepstrum is a useful tool to identify and separate harmonic families in the current
spectrum by liftering the harmonic peaks in the power spectrum. Compared to the
auto-correlation function, cepstrum can detect lower-level harmonics.
Rotating
Machinery
Rotating
Machinery module for VibraQuest provides powerful tools for analyzing and diagnosing
faults in rotating/reciprocating machinery. This module includes an extensive
database of over 25,000 bearings from major manufacturers for calculating bearing
faults. Fault frequencies associated with gearboxes, belt drives, pumps, fans,
and other user-defined mechanical components can be calculated and displayed.
You can also apply several advanced signal processing techniques for analysis
and diagnosis.
Rotating machinery produces vibration signatures depending upon the mechanism
involved. The purpose of analysis is to identify the forcing frequencies so that
root cause can be addressed and corrective action can be taken. The Rotating
Machinery module for VibraQuest has built-in template for calculating fault frequencies
associated with various mechanisms of typical machinery.
| Features
Automatic machine fault frequency identification and spectrum mapping
Choice of bearing, gearbox, fan, belt, pump, and user-defined frequencies
Available gearbox types: two-element, four-element, epicyclic gearbox
(with Planetary, Star, and Solar configuration)
Enveloping function for fault detection of rolling element and gearbox
Cepstrum function for gearbox analysis
Ultra-high resolution with up to 100,000 line FFT
Illustrated explanation of selected frequencies
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Benefits
Built-in template for calculating fault frequencies caused by various
sources
Excellent tool for diagnosis of local faults in rolling element bearings,
gearbox, and turbine blades
Insight of operating machines without shutting them down
Designed for all four types of bearing faults for any particular bearing:
BPFO, BPFI, BFF, and FTF
Identification of vibration signatures of a machine
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Fault frequencies
For rolling element bearings, when the rolling elements strike a local fault
on the inner or outer race, or a fault on a rolling element strikes the inner
or outer race, an impact is produced. The bearing frequencies can be dented as
BPFO (ball passing frequency outer race), BPFI (ball passing frequency inner
race), BFF (ball fault frequency), and FTF (fundamental train frequency). Using
the Rotating Machinery module, rolling element bearing frequencies are specified
from item loaded from database. Other available frequency categories include
gearbox frequency, primary belt frequency, belt resonance frequencies, chain
drive frequency, and fan blade pass/pump vane pass frequencies. Faulted frequencies
can be mapped on the vibration spectrum.
Envelope analysis
Gearbox and rolling element faults generate amplitude modulation which causes
sidebands in the spectrum. Envelope analysis is a useful tool for amplitude demodulation.
The envelope analysis function in VibraQuest is based on an innovatively improved
Hilbert transform method. This improved demodulation method attenuates the influences
from high frequency contents and makes the envelope frequency easier to be identified.
Cepstrum analysis
Cepstrum, which is an anagram of spectrum, is the inverse Fourier transform of
the natural logarithm of a spectrum. Cepstrum analysis is a useful tool to identify
and separate harmonic families in gearbox and bearing signals by liftering the
harmonic peaks in the power spectrum. Compared to the auto-correlation function,
cepstrum can detect lower-level harmonics.
Data Streaming
In
many applications, it is important to collect data for long periods
of time. Data Streaming module for VibraQuest allows you to capture,
view and store long-duration and high-speed multi-channel data acquisition
simultaneously. You also can use play-back panel to post-analyze the
data with all the analysis functions and parameters which are available
for steady-state data analysis.
Sometimes we need to collect data for a long period of time before
we can see transient phenomenon. Long-duration data acquisition is
also important in automotive testing, machinery fault diagnosis and
analysis. All the signals have to be continuously sampled at high speed
to capture all the events associated with the test objectives. In order
to ensure the fidelity of the data, it is necessary to display the
data in some format while streaming and saving. The Data Streaming
module can acquire data with speed up to 5 mega-samples/second. You
can view multi-channel waveforms or spectra in real time. The captured
data can be post-analyzed using the stream play functions which include
time waveform, amplitude spectrum, frequency response function, coherence,
orbit, and Bode plot. You can go through the data quickly using fast
forward/reverse buttons, similar to those found on a tape recorder,
or simply by dragging the lead cursors. The data segments are user-selectable,
as is the block size for the FFT-calculation. All the time and frequency
domain functions are available for data analysis. The data can be exported
into universal ASCII format and ME’scope data format.
| Features
and Benefits
High-speed multi-channel data streaming to hard disk
Record long records of gap-free data for future in-depth analysis
Indication of disk volume and maximum recording time
Turn on/off display while recording
Choice of buffer drive
Play back any gap-free data
Control of display length and data block size
Playback buttons include: back to beginning, fast rewind, last block,
next block, fast forward, forward to the end.
User can drag cursors to any position to get the data segment for analysis
Convenient tool to view the overall characteristics of data
Unique playback functions allow flexible data view
Easy report generation
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Transient Analysis
In
structural dynamics, machine diagnostics, and many applications, a
signal may be nonstationary. The Transient Analysis module for VibraQuest
provides powerful tools to analyze the features of transient signals
using joint time-frequency and wavelet transform. With our advanced
analysis algorithms, you can view the power distribution of a time-dependent
signal using variety of approaches, extract transient features, perform
fast time-varying filtering, and reduce random noise.
The fast Fourier transform (FFT) is the most widely used signal processing
approach nowadays. However, the FFT has some drawbacks. First of all,
the Fourier transform gives an averaged spectrum of a time signal over
the entire time interval. A FFT-based spectrum can not detect the instantaneous
frequency change, nor display how a frequency component evolves with
time. A satisfied frequency resolution requires a long signal. Transient
signals generally last in a very short time with fast frequency change,
for example, engine knocks. For such a signal, the FFT spectrum is
not able to catch the transient features, and the frequency resolution
is low. In addition, if the fundamental frequency of a signal increases/decreases
in time, the bandwidth of this frequency component in the FFT-spectrum
becomes much wider than its real bandwidth. The faster the change of
frequencies or amplitudes, the wider the bandwidth. During a starting-up
or shutting-down test of a rotating machine, the bandwidth of the fundamental
frequency and all the harmonics widens, which makes all the harmonics
overlap in the frequency domain. Therefore the FFT spectrum is no longer
able to distinguish the vibration caused by different source. Using
advanced signal processing techniques, such as joint time-frequency
and wavelet transforms, you can overcome the limitations of the FFT
mentioned above.
| Features
Gabor analysis
Short-time Fourier transform
Time-varying filter
Order control smoothes Gabor spectragram
Reassigned STFT improves the resolution of spectragram
Analytic signal reduces cross-term interference in Wigner-Ville distribution
Analytic wavelet scalogram
Mean instantaneous frequency
Wavelet-based noise reduction
Easy report generation
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Benefits
Joint time-frequency spectragram shows how the frequency components evolve
with time
Time-varying filter allows you to filter out component whose frequency
changes
Short-time signal characterization
Transient feature detection: time varying harmonics, peaks, discontinuity
Time signals reconstructed from time-frequency analysis have better SNR
than the FFT method
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Clarify patterns of frequency changes
One major benefit of applying the Transient Analysis module to a signal
is to discover the pattern of frequency changes, which often clarifies
the nature of the signal. Once you identify a pattern, you can analyze
and classify the pattern. The figure on the right shows the Gabor spectrogram
of a signal obtained from a fluid-film bearing machine during a starting-up
and shutting-down test. The horizontal and vertical axes are time and
frequency, respectively. Different colors represent the power distribution.
The frequencies associated with the running speed (1X) as well as the
harmonics are clearly seen. When the running speed meets the first
resonance frequency of the shaft, the energy reaches a maximum point.
The oil whirl and whip are also clearly shown.
Time-Varying Filter
As mentioned above, different frequency contents of a transient signal
may overlap in the frequency domain. You can use time-frequency analysis
to distinct time-frequency components, perform time-varying filtering
and reconstruct these components for further analysis. The figure below
shows the procedure for a machine starting-up signal. On the time-frequency
color map, the frequencies associated with the running speed and the
harmonics, and the resonance frequency of the bending vibration are
clearly distinguishable. Three time-frequency components can be separated
using three mask matrices. The random noise is amazingly reduced. Then
the three components can be reconstructed to the time domain.
Order Analysis
Order
analysis is a format of harmonic analysis specially designed for rotating
or reciprocating machines. Order Analysis module for VibraQuest provides
you powerful tools for rotating machinery diagnostics. With our advanced
analysis algorithms you can perform RPM calculation, measurement of
the power distribution in terms of RPM or frequency, extraction of
any order component, measurement of the magnitude and phase of any
order component, and examining signals in different presentation format.
Common mechanical phenomena in rotating/reciprocating machinery are
related to the rotational speed of the shaft. In the conventional frequency
analysis, a signal is sampled at instances with the fixed-time interval.
However, the running speed of a rotating machine is generally not constant.
Speed fluctuations are common in machines operating under load varying
conditions. Sometimes it is important to examine the start-up or shut-down
conditions. In these cases, the conventional frequency analysis produces
significant spectral smearing or leakage, which makes it difficult
to detect defects associated with various mechanisms. With tachometer,
a signal can be sampled with fixed-angle interval, which avoids the
problems mentioned above. Our Order Analysis module provides state-of-art
Gabor expansion-based order analysis method, as well as resampling
method for on-line order tracking.
| Features
On-line order tracking and spectral map
Digital and analog tachometer processing
Designed to separate RPM-synchronous and non-synchronous components
Automatic order selection tools to extract the most significant orders
Real-Time data resampling and order spectrum
Order extraction without tachometer
Waterfall, color maps, orbit, centerline, Bode plot, polar plot
Slow roll compensation
Fast and easy report generation
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Benefits
Accurate RPM estimation leads to robust order spectrum calculation and
order extraction
Useful tool to reveal critical speeds, resonances, oil whirl/whip, instability,
and load fluctuation effects
Amplitude and phase of first order for balancing and foundation diagnoses
of industrial rotors
Isolation of order interaction
Versatile and colorful data presentation allows better interpreting data
Measure power distribution in terms of RPM/time/frequency
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On-line Order Analysis and Data Acquisition
Our data acquisition (DAQ) system can measure digital/analog tachometer,
ICP transducer, proximity probe and all standard industrial transducer
signals. The DAQ devices possess high dynamic range (110/118 dB) and
wide bandwidth (102/204 kHz). The on-line order analysis provides full
capabilities to display the order spectrum, spectral map, waterfall,
orbit, and Bode plots.
Tachometerless Order Analysis
For test environments where the tachometer is not available, the Gabor
analysis-based order tracking allows you to compute the rotating speed
information by performing some interactive operations on the spectral
map.
Slow Roll Compensation
The slow roll vector can be automatically extracted from a low speed
signal for slow roll compensation.
Functions
Order Analysis module allows you to perform the spectrum averaging
in the following weighting modes: rms, vector, and peak hold. This
module also provides order power spectrum, order magnitude, and order
phase.
Displays
You can select the color maps and waterfall plots in the following
formats: Frequency-RPM, Frequency-Time, Order-RPM. Order Analysis module
also can display Orbit, Centerline, Bode, and Polar plots.
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Data Acquisition Software
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| Steady State Mode |
On-line time waveform, spectra, averaging, with assigned frequency limit,
spectral lines, and number of blocks |
| Hammer Test Mode |
On-line analyzer with double-hit rejection, trigger setting, pre-trigger
sampling and force/exponential windows |
| Transient Test Mode |
On-line order tracking with assigned start RPM, end RPM and RPM increment
step |
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System Management
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| Project management |
Each project is deigned for a kind of test, which can be reused to simplify
operation, assure consistency and same time. More than 30 built-in test templates
are provided. |
| Reporting |
Customize report into Microsoft Word, Excel, or HTML format |
| User management |
Administrator manages multiple users who have individual tests and reports |
| Sensors and units |
Common sensors and units are included. User can add/edit sensor type, sensitivity
and unit. Non-linear sensitivity curve can be defined for polynomial curve-fitting
routine. Both metric and English units are available. |
| Export formats |
ASCII, ME’scope |
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Analysis Functions
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| Time domain analysis |
Time waveform, windowing (Hanning, flat top, Hamming,
Blackman, Blackman-Harris, exact Blackman, 4 term B-Harris, 7
term B-Harris, force, exponential) |
| Frequency domain analysis |
Amplitude spectrum, power spectrum, spectral density,
frequency response function, impulse response function, coherence,
cross spectrum, averaging
(RMS/vector/peak), linear and exponential weighting, linear/log/dB scaling |
| Cursor modes |
Main cursor, secondary cursor, harmonic cursor,
sideband cursor,
true peak |
| Statistical analysis |
Mean, RMS, standard deviation, variance, Kurtosis, median, mode, skewness,
covariance, correlation, MSE |
| Data presentation |
1/2/4/8 window analysis, Bode, Nyquist, orbit
plot, waterfall and polar plots |
| Acoustic analysis |
Octave analysis, fractional octave analysis, frequency weighting (linear/A/B/C
weighting), averaging (linear/exponential/equal confidence/peak), sound
level meter |
| Digital Filter Design |
Classical filter (Butterworth/ Chebyshev/ inverse Chebyshev/ Elliptic/
Kaiser window/ Dolph-Chebyshev window/ Equi-Ripple FIR), narrow band
filter, notch/peak filter, comb filter |
| Add-on Modules |
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| Induction Motor Fault Diagnosis |
Automatically identify induction motor fault frequencies and map on
the spectrum; Choice of shorted turns, phase imbalance, single phasing,
broken rotor bars, air gap eccentricity, and bearing defects |
| Rotating Machinery |
Built-in template for calculating fault frequencies of bearing, gearbox,
fan, belt, pump, and user-defined frequencies; database of over 25,000
bearings from major manufacturers; enveloping analysis, cepstrum analysis |
| Data Streaming |
High-speed multi-channel data streaming to hard disk; playback features
include: back to beginning, fast rewind, last block, next block, fast
forward, forward to the end; throughput rate: 5 mega-samples/second |
| Transient Analysis |
Gabor analysis;short-time Fourier transform and reassigned STFT; analytic
signal reduces cross-term interference in Wigner-Ville distribution;
analytic wavelet scalogram; time-variant filter |
| Order Analysis |
On-line order tracking; waterfall, color maps, orbit, centerline, Bode
plot, polar plot; slow roll compensation |
| Balancing |
Influence coefficient method, for-run method, trim balance method, for 1-plane
and 2-plane balancing; interactive step-by-step operation provide on screen;
maintain machine data and balancing history; slow-roll compensation |
italic items are available in VibraQuest Pro only
|
PRODUCTS 
