Autonomous actuation of zero modes in mechanical networks far from equilibrium
A zero mode, or floppy mode, is a non-trivial coupling of mechanical components yielding a degree of freedom with no resistance to deformation. Engineered zero modes have the potential to act as microscopic motors or memory devices, but this requires an internal actuation mechanism that can overcome...
| Hlavní autoři: | , , |
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| Médium: | Journal article |
| Vydáno: |
American Physical Society
2018
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| _version_ | 1826268408816074752 |
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| author | Woodhouse, F Ronellenfitsch, H Dunkel, J |
| author_facet | Woodhouse, F Ronellenfitsch, H Dunkel, J |
| author_sort | Woodhouse, F |
| collection | OXFORD |
| description | A zero mode, or floppy mode, is a non-trivial coupling of mechanical components yielding a degree of freedom with no resistance to deformation. Engineered zero modes have the potential to act as microscopic motors or memory devices, but this requires an internal actuation mechanism that can overcome unwanted fluctuations in other modes and the dissipation inherent in real systems. In this work, we show theoretically and experimentally that complex zero modes in mechanical networks can be selectively mobilized by non-equilibrium activity. We find that a correlated active bath actuates an infinitesimal zero mode while simultaneously suppressing fluctuations in higher modes compared to thermal fluctuations, which we experimentally mimic by high frequency shaking of a physical network. Furthermore, self-propulsive dynamics spontaneously mobilise finite mechanisms as exemplified by a self-propelled topological soliton. Non-equilibrium activity thus enables autonomous actuation of coordinated mechanisms engineered through network topology. |
| first_indexed | 2024-03-06T21:09:14Z |
| format | Journal article |
| id | oxford-uuid:3d90ed29-0c38-4022-8178-7ea3fdc860a8 |
| institution | University of Oxford |
| last_indexed | 2024-03-06T21:09:14Z |
| publishDate | 2018 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | oxford-uuid:3d90ed29-0c38-4022-8178-7ea3fdc860a82022-03-26T14:20:09ZAutonomous actuation of zero modes in mechanical networks far from equilibriumJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:3d90ed29-0c38-4022-8178-7ea3fdc860a8Symplectic Elements at OxfordAmerican Physical Society2018Woodhouse, FRonellenfitsch, HDunkel, JA zero mode, or floppy mode, is a non-trivial coupling of mechanical components yielding a degree of freedom with no resistance to deformation. Engineered zero modes have the potential to act as microscopic motors or memory devices, but this requires an internal actuation mechanism that can overcome unwanted fluctuations in other modes and the dissipation inherent in real systems. In this work, we show theoretically and experimentally that complex zero modes in mechanical networks can be selectively mobilized by non-equilibrium activity. We find that a correlated active bath actuates an infinitesimal zero mode while simultaneously suppressing fluctuations in higher modes compared to thermal fluctuations, which we experimentally mimic by high frequency shaking of a physical network. Furthermore, self-propulsive dynamics spontaneously mobilise finite mechanisms as exemplified by a self-propelled topological soliton. Non-equilibrium activity thus enables autonomous actuation of coordinated mechanisms engineered through network topology. |
| spellingShingle | Woodhouse, F Ronellenfitsch, H Dunkel, J Autonomous actuation of zero modes in mechanical networks far from equilibrium |
| title | Autonomous actuation of zero modes in mechanical networks far from equilibrium |
| title_full | Autonomous actuation of zero modes in mechanical networks far from equilibrium |
| title_fullStr | Autonomous actuation of zero modes in mechanical networks far from equilibrium |
| title_full_unstemmed | Autonomous actuation of zero modes in mechanical networks far from equilibrium |
| title_short | Autonomous actuation of zero modes in mechanical networks far from equilibrium |
| title_sort | autonomous actuation of zero modes in mechanical networks far from equilibrium |
| work_keys_str_mv | AT woodhousef autonomousactuationofzeromodesinmechanicalnetworksfarfromequilibrium AT ronellenfitschh autonomousactuationofzeromodesinmechanicalnetworksfarfromequilibrium AT dunkelj autonomousactuationofzeromodesinmechanicalnetworksfarfromequilibrium |