Kinematic model
Machines that rotate vibrate. The vibrations can be aligned with components of the machine in
a spectral analysis. For a reliable frequency analysis, sources to the vibration frequencies to be
expected, and their interdependency must be known. Even in a simple motor-pump machine
train, complex vibration causes can exist. A kinematic model helps simplify the correlations.
A kinematic model maps the kinematic conditions in a machine train. Based on a reference
speed at a measure location on the train, VIBXPERT 3 uses a kinematic model to calculate the
rotational speed at every measure location on the train machine. The reference speed is cal-
culated or measured at the reference measure location.
The kinematic model has predefined models for many common machine types.
Assets can be modeled in VIBXPERT 3. If machine trains are not mapped correctly, it is not pos-
sible to measure the machines. VIBXPERT 3 shows a hint that the machine model is invalid.
In the configuration screen, define the machine train and all measure locations. Assign all
measure locations the necessary measure tasks .
To complete the kinematic model for a machine train, tap a machine at the machine level (
). In the above case it is the motor. Then tap ( ).
54 Version:1.0
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