42 lines
3.0 KiB
Markdown
42 lines
3.0 KiB
Markdown
+++
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title = "HAC-HAC"
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author = ["Thomas Dehaeze"]
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draft = false
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+++
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Tags
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:
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High-Authority Control/Low-Authority Control
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From <sup id="454500a3af67ef66a7a754d1f2e1bd4a"><a class="reference-link" href="#preumont18_vibrat_contr_activ_struc_fourt_edition" title="Andre Preumont, Vibration Control of Active Structures - Fourth Edition, Springer International Publishing (2018).">(Andre Preumont, 2018)</a></sup>:
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> The HAC/LAC approach consist of combining the two approached in a dual-loop control as shown in Figure [1](#org21fb08d). 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:
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>
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> - The active damping extends outside the bandwidth of the HAC and reduces the settling time of the modes which are outsite the bandwidth
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> - The active damping makes it easier to gain-stabilize the modes outside the bandwidth of the output loop (improved gain margin)
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> - The larger damping of the modes within the controller bandwidth makes them more robust to the parmetric uncertainty (improved phase margin)
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<a id="org21fb08d"></a>
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{{< figure src="/ox-hugo/hac_lac_control_architecture.png" caption="Figure 1: HAC-LAC Control Architecture" >}}
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Nice papers:
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- <sup id="ef357e45dadd8cc8869beda6e463777b"><a class="reference-link" href="#williams89_limit" title="Williams \& Antsaklis, Limitations of vibration suppression in flexible space structures, nil, in in: {Proceedings of the 28th IEEE Conference on Decision and
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Control}, edited by (1989)">(Williams \& Antsaklis, 1989)</a></sup>
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- <sup id="df6fde1eeef81966b2c7fb5421adbe8d"><a class="reference-link" href="#aubrun80_theor_contr_struc_by_low_author_contr" title="Aubrun, Theory of the Control of Structures By Low-Authority Controllers, {Journal of Guidance and Control}, v(5), 444-451 (1980).">(Aubrun, 1980)</a></sup>
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# Bibliography
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<a class="bibtex-entry" id="preumont18_vibrat_contr_activ_struc_fourt_edition">Preumont, A., *Vibration control of active structures - fourth edition* (2018), : Springer International Publishing.</a> [↩](#454500a3af67ef66a7a754d1f2e1bd4a)
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<a class="bibtex-entry" id="williams89_limit">Williams, T., & Antsaklis, P., *Limitations of vibration suppression in flexible space structures*, In , Proceedings of the 28th IEEE Conference on Decision and Control (pp. ) (1989). : .</a> [↩](#ef357e45dadd8cc8869beda6e463777b)
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<a class="bibtex-entry" id="aubrun80_theor_contr_struc_by_low_author_contr">Aubrun, J., *Theory of the control of structures by low-authority controllers*, Journal of Guidance and Control, *3(5)*, 444–451 (1980). http://dx.doi.org/10.2514/3.56019</a> [↩](#df6fde1eeef81966b2c7fb5421adbe8d)
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## Backlinks {#backlinks}
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- [Control of spacecraft and aircraft]({{< relref "bryson93_contr_spacec_aircr" >}})
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- [Vibration Control of Active Structures - Fourth Edition]({{< relref "preumont18_vibrat_contr_activ_struc_fourt_edition" >}})
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