Closed-loop control of a Piezo-Fluidic amplifier
Fluidic valves based on the Coanda effect are increasingly being considered for use in aerodynamic flow control applications. A limiting factor is their variation in switching time, which often precludes their use. The purpose of this paper was to demonstrate the closed-loop control of a recently de...
| Main Authors: | , |
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| Format: | Journal article |
| Language: | English |
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American Institute of Aeronautics and Astronautics
2020
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| _version_ | 1797100386330345472 |
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| author | Nicholls, C Bacic, M |
| author_facet | Nicholls, C Bacic, M |
| author_sort | Nicholls, C |
| collection | OXFORD |
| description | Fluidic valves based on the Coanda effect are increasingly being considered for use in aerodynamic flow control applications. A limiting factor is their variation in switching time, which often precludes their use. The purpose of this paper was to demonstrate the closed-loop control of a recently developed novel piezo-fluidic valve that reduces response time uncertainty at the expense of operating bandwidth. Use is made of the fact that a fluidic jet responds to a piezo tone bydeflectingaway fromits steady-state position.Acontrol signal used to vary this deflection isamplitude modulated onto the piezo tone. Using only a pressure measurement fromone of the device output channels, an outputbased linear quadratic Gaussian regulator was designed to follow a desired reference deflection, achieving control of a 90 m ⋅ s−1 jet. Finally, the controller’s performance in terms of disturbance rejection and response time predictability is demonstrated. |
| first_indexed | 2024-03-07T05:36:44Z |
| format | Journal article |
| id | oxford-uuid:e4261944-3f85-49b4-b0cb-fa34fb2567ea |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T05:36:44Z |
| publishDate | 2020 |
| publisher | American Institute of Aeronautics and Astronautics |
| record_format | dspace |
| spelling | oxford-uuid:e4261944-3f85-49b4-b0cb-fa34fb2567ea2022-03-27T10:14:31ZClosed-loop control of a Piezo-Fluidic amplifierJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:e4261944-3f85-49b4-b0cb-fa34fb2567eaEnglishSymplectic ElementsAmerican Institute of Aeronautics and Astronautics2020Nicholls, CBacic, MFluidic valves based on the Coanda effect are increasingly being considered for use in aerodynamic flow control applications. A limiting factor is their variation in switching time, which often precludes their use. The purpose of this paper was to demonstrate the closed-loop control of a recently developed novel piezo-fluidic valve that reduces response time uncertainty at the expense of operating bandwidth. Use is made of the fact that a fluidic jet responds to a piezo tone bydeflectingaway fromits steady-state position.Acontrol signal used to vary this deflection isamplitude modulated onto the piezo tone. Using only a pressure measurement fromone of the device output channels, an outputbased linear quadratic Gaussian regulator was designed to follow a desired reference deflection, achieving control of a 90 m ⋅ s−1 jet. Finally, the controller’s performance in terms of disturbance rejection and response time predictability is demonstrated. |
| spellingShingle | Nicholls, C Bacic, M Closed-loop control of a Piezo-Fluidic amplifier |
| title | Closed-loop control of a Piezo-Fluidic amplifier |
| title_full | Closed-loop control of a Piezo-Fluidic amplifier |
| title_fullStr | Closed-loop control of a Piezo-Fluidic amplifier |
| title_full_unstemmed | Closed-loop control of a Piezo-Fluidic amplifier |
| title_short | Closed-loop control of a Piezo-Fluidic amplifier |
| title_sort | closed loop control of a piezo fluidic amplifier |
| work_keys_str_mv | AT nichollsc closedloopcontrolofapiezofluidicamplifier AT bacicm closedloopcontrolofapiezofluidicamplifier |