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Tracking Analysis Software
DS-0222 |
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Example of rotation-tracking diagram of engine vibration
Example of data output by 3D mapping |
This software enables tracking
analysis with high-speed (calculation speed: approx. at
20msec/4-ch), high-resolution (maximum at 1000 blocks) and
high-accuracy (more than 100dB dynamic range). Each model has V,
W and X at the end of model name according to its number of
channels. DS-0222V is available for 2-ch, DS-0222W is for 4 to
8-ch, and DS-0222X is for 10 to 32-ch. It can plot
rotation-tracking diagram during calculation, and also can set
and plot the diagram of intended order or frequency after
calculation. If you file a 3D display data, you can read the
file in order to plot its rotation-tracking diagram later. Also,
campbell plot can be plotted as an option. Windows (Windows
2000/XP/VISTA) is applicable as an operating system.
*DS-0221 FFT analysis software is required to perform
tracking analysis. |
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<What is
Tracking analysis>
Rotational machines such as engines or
compressors etc. are rotating with wide range of rotational
speed from low to high speed. For those rotational machines,
resonance between rotational speed and natural frequency of each
component (rotational shaft, gear, bracket etc.) of rotational
machine may be causing serious problem. As an example of
torsional vibration including large generator, resonance may
generate excitation energy lager than allowable stress, and
therefore it causes serious accident to destruction.
Rotation-tracking analysis helps greatly to observe the cause
such as which component or order of rotational speed makes noise
and vibration when a rotational machine makes vibration with
certain rotational speed. As shown in the below,
rotation-spectrum diagram (3D spectrum) figures out the change
of frequency (order) spectrum respect to the change of
rotational speed. In comparison, rotation-tracking analysis
(order tracking analysis) shows that how much noise and
vibration are generated from which order of rotational component
with two-dimensional graph.
 
＊Rotational order is defined that a based
rotational speed is 1-order, n-times rotational component is
n-order. Data analysis with order on the X axis and
amplitude on the Y axis is called rotational order ratio
analysis. Rotational order ratio analysis requires
rotational signal information.
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Specifications （１）Rotational pulse
input
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Number of input pulses |
0.5 to 1024 pulse/1 rotation |
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Input impedance |
100 kΩ |
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Input coupling |
DC or AC (0.5 Hz / -3dB)
Voltage fullscale : TTL or ±10V |
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Slice level |
±100％ within voltage fullscale
Minimum input level: ±0.5V |
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Slope |
+/- selectable |
（２）Analysis
section
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Tracking analysis |
Memory tracking (real-time plotting is possible )
Number of memory blocks : 200 to 1000 |
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Maximum analysis orders |
6.25 to 800 orders |
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Number of sampling points |
Initial setting value 2048 (maximum at 16384) Order
resolution: initial setting 800 lines (maximum at 6400
lines) Rang of measurable rotational speed (at 1P/R) |
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Range of rotational speed under measurement (at 1P/R) |
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Maximum analysis order |
Measurable rotational
speed (r/min) |
Number of sampling points
/ rotation |
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6.25 |
300
to 190000 |
16 |
| 12.5 |
200
to 96000 |
32 |
| 25 |
150
to 48000 |
64 |
| 50 |
150
to 24000 |
128 |
| 100 |
100
to 12000 |
256 |
| 200 |
100
to 6000 |
512 |
| 400 |
100
to 3000 |
1024 |
| 800 |
100
to 1250 |
2048 |
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Display function |
Time-axis waveform, Frequency analysis (amplitude, phase),
Order-ratio analysis (amplitude, phase), Constant-ratio
tracking analysis (amplitude, phase), Constant-width
tracking analysis (amplitude, phase), Fixed frequency
tracking analysis (amplitude, phase), Time tracking analysis
(amplitude, phase), 3D mapping , Campbell plot ( optional
DS-0244) |
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Processing function |
Exponential averaging, Maximum amplitude order tracking,
Partial overall tracking, Smoothing processing (2 types),
Averaging function of tracking analysis data |
（３）Input,
Output function of data
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Data file |
Open/Save at binary or text (.txt) format |
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Tracking data |
Open/Save at binary format, save only at text (.txt) format |
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3D mapping |
Open/Save at binary format |
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Analysis condition file |
Open/Save of arbitrary measurement condition file |
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Print function of data |
Print function by installing of printer driver |
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Copy function of data |
Pasting data on clipboard at text or bitmap format. |
Applications for tracking
analysis
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Applications |
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Noise/Vibration analysis for
automobile engine
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Noise analysis for turbo charger
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Measurement of transmittance error
for transmission
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Torsional vibration analysis for
deferential gear
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Vibration analysis for turbine
blade
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Mode circle (directional vector
display) analysis for large generator
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Noise analysis for motorcycle
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Revised: 2006/09/19
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