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 by deflecting away from its steady-state position. A control signal used to vary this deflection is amplitude modulated onto the piezo tone. Using only a pressure measurement from one of the device output channels, an output-based 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.


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    Title :

    Closed-Loop Control of a Piezo-Fluidic Amplifier


    Contributors:

    Published in:

    AIAA Journal ; 58 , 6 ; 2414-2427


    Publication date :

    2020-06-01




    Type of media :

    Conference paper , Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English




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