2.4 KiB
2.4 KiB
+++ title = "HAC-HAC" author = ["Dehaeze Thomas"] draft = false +++
Tags :
High-Authority Control/Low-Authority Control
From (Preumont 2018):
The HAC/LAC approach consist of combining the two approached in a dual-loop control as shown in Figure 1. The inner loop uses a set of collocated actuator/sensor pairs for decentralized active damping with guaranteed stability ; the outer loop consists of a non-collocated HAC based on a model of the actively damped structure. This approach has the following advantages:
- The active damping extends outside the bandwidth of the HAC and reduces the settling time of the modes which are outsite the bandwidth
- The active damping makes it easier to gain-stabilize the modes outside the bandwidth of the output loop (improved gain margin)
- The larger damping of the modes within the controller bandwidth makes them more robust to the parmetric uncertainty (improved phase margin)
{{< figure src="/ox-hugo/hac_lac_control_architecture.png" caption="<span class="figure-number">Figure 1: HAC-LAC Control Architecture" >}}
Nice papers:
Bibliography
Aubrun, J.N. 1980. “Theory of the Control of Structures by Low-Authority Controllers.” Journal of Guidance and Control 3 (5): 444–51. doi:10.2514/3.56019.
Preumont, Andre. 2018. Vibration Control of Active Structures - Fourth Edition. Solid Mechanics and Its Applications. Springer International Publishing. doi:10.1007/978-3-319-72296-2.
Williams, T.W.C., and P.J. Antsaklis. 1989. “Limitations of Vibration Suppression in Flexible Space Structures.” In Proceedings of the 28th Ieee Conference on Decision and Control, nil. doi:10.1109/cdc.1989.70563.