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@@ -28,7 +28,7 @@ Causes:
**Types of error motion**
A distinction is made between (see Figure <fig:wardle15_synchronous_asynchronous_schematic>):
A distinction is made between (see [Figure 1](#figure--fig:wardle15-synchronous-asynchronous-schematic)):
- motion errors that are harmonic of the basic rotor speed: _synchronous_ motion error
- those that are node: _asynchronous_ motion errors
@@ -42,19 +42,19 @@ A distinction is made between (see Figure <fig:wardle15_synchronous_asynchronous
A capacitive sensor is typically used, and the measurement is performed over a time period corresponding to several (typically five) revolutions of the bearing.
It is displayed as a polar plot of motion error amplitude versus angle of rotation (Figure <fig:wardle15_typical_error_plot>).
It is displayed as a polar plot of motion error amplitude versus angle of rotation ([Figure 2](#figure--fig:wardle15-typical-error-plot)).
<a id="figure--fig:wardle15-typical-error-plot"></a>
{{< figure src="/ox-hugo/wardle15_typical_error_plot.png" caption="<span class='figure-number'>Figure 2: </span>Total error motion" >}}
The Synchronous error motion (i.e. error that are harmonics of the rotational speed) can be extracted (Figure <fig:wardle15_synchronous_error_example>).
The Synchronous error motion (i.e. error that are harmonics of the rotational speed) can be extracted ([Figure 3](#figure--fig:wardle15-synchronous-error-example)).
<a id="figure--fig:wardle15-synchronous-error-example"></a>
{{< figure src="/ox-hugo/wardle15_synchronous_error_example.png" caption="<span class='figure-number'>Figure 3: </span>Synchronous motion error" >}}
It can then be separated into a "_fundamental error motion_" and a "_residual error motion_" (Figure <fig:wardle15_fundamental_and_residual_errors>).
It can then be separated into a "_fundamental error motion_" and a "_residual error motion_" ([Figure 4](#figure--fig:wardle15-fundamental-and-residual-errors)).
The fundamental error motion contains only one frequency corresponding to the speed of the rotation of the bearing.
For radial measurements, it corresponds to the eccentricity, and is not always significant.
@@ -62,7 +62,7 @@ For radial measurements, it corresponds to the eccentricity, and is not always s
{{< figure src="/ox-hugo/wardle15_fundamental_and_residual_errors.png" caption="<span class='figure-number'>Figure 4: </span>(a) Fundamental error motion; and (b) residual synchronous error motion" >}}
The Asynchronous error motion (Figure <fig:wardle15_asynchronous_error_motion_example>) contains all other motion error frequencies.
The Asynchronous error motion ([Figure 5](#figure--fig:wardle15-asynchronous-error-motion-example)) contains all other motion error frequencies.
<a id="figure--fig:wardle15-asynchronous-error-motion-example"></a>