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 . Finally, the controller’s performance in terms of disturbance rejection and response time predictability is demonstrated.
Closed-Loop Control of a Piezo-Fluidic Amplifier
AIAA Journal ; 58 , 6 ; 2414-2427
2020-06-01
Conference paper , Article (Journal)
Electronic Resource
English
Closed-loop control of a piezo-fluidic amplifier
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