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Thomas Dehaeze
2020-08-17 23:00:20 +02:00
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content/article/preumont02_force_feedb_versus_accel_feedb.md
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@@ -8,7 +8,7 @@ Tags
: [Vibration Isolation]({{< relref "vibration_isolation" >}})
Reference
: <sup id="525e1e237b885f81fae3c25a3036ba6f"><a class="reference-link" href="#preumont02_force_feedb_versus_accel_feedb" title="Preumont, Fran\ccois, Bossens, \&amp; Abu-Hanieh, Force Feedback Versus Acceleration Feedback in Active Vibration Isolation, {Journal of Sound and Vibration}, v(4), 605-613 (2002).">(Preumont {\it et al.}, 2002)</a></sup>
: ([Preumont et al. 2002](#org1f14c5d))
Author(s)
: Preumont, A., A. Francois, Bossens, F., & Abu-Hanieh, A.
@@ -26,14 +26,14 @@ The force applied to a **rigid body** is proportional to its acceleration, thus
Thus force feedback and acceleration feedback are equivalent for solid bodies.
When there is a flexible payload, the two sensing options are not longer equivalent.
- For light payload (Figure [1](#org307b349)), the acceleration feedback gives larger damping on the higher mode.
- For heavy payload (Figure [2](#orgc0c4ad3)), the acceleration feedback do not give alternating poles and zeros and thus for high control gains, the system becomes unstable
- For light payload (Figure [1](#orgbbc4740)), the acceleration feedback gives larger damping on the higher mode.
- For heavy payload (Figure [2](#orgdf8d8cc)), the acceleration feedback do not give alternating poles and zeros and thus for high control gains, the system becomes unstable
<a id="org307b349"></a>
<a id="orgbbc4740"></a>
{{< figure src="/ox-hugo/preumont02_force_acc_fb_light.png" caption="Figure 1: Root locus for **light** flexible payload, (a) Force feedback, (b) acceleration feedback" >}}
<a id="orgc0c4ad3"></a>
<a id="orgdf8d8cc"></a>
{{< figure src="/ox-hugo/preumont02_force_acc_fb_heavy.png" caption="Figure 2: Root locus for **heavy** flexible payload, (a) Force feedback, (b) acceleration feedback" >}}
@@ -45,5 +45,7 @@ The same is true for the transfer function from the force actuator to the relati
> According to physical interpretation of the zeros, they represent the resonances of the subsystem constrained by the sensor and the actuator.
# Bibliography
<a class="bibtex-entry" id="preumont02_force_feedb_versus_accel_feedb">Preumont, A., A. Fran\ccois, Bossens, F., & Abu-Hanieh, A., *Force feedback versus acceleration feedback in active vibration isolation*, Journal of Sound and Vibration, *257(4)*, 605–613 (2002). http://dx.doi.org/10.1006/jsvi.2002.5047</a> [↩](#525e1e237b885f81fae3c25a3036ba6f)
## Bibliography {#bibliography}
<a id="org1f14c5d"></a>Preumont, A., A. François, F. Bossens, and A. Abu-Hanieh. 2002. “Force Feedback Versus Acceleration Feedback in Active Vibration Isolation.” _Journal of Sound and Vibration_ 257 (4):605–13. <https://doi.org/10.1006/jsvi.2002.5047>.