Dynamic Compensation of a Synthetic Jetlike Actuator for Closed-Loop Cavity Flow Control

Kim, Kihwan; Debiasi, Marco; Schultz, Ryan; Serrani, Andrea; Samimy, Mo

doi:10.2514/1.30095

Cited by 6 publications

(3 citation statements)

References 21 publications

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“…The most recent data from our laboratory suggest that these oscillations are introduced by the actuator, which can be controlled allowing suppression of these induced tones. 42 In any event, these results seem to show that the structures in the initial part of the shear layer do not possess sufficient energy and there is no acoustic feedback to allow their selective amplification over the cavity extent.…”

Section: Single Point Time-resolved Flow Resultsmentioning

confidence: 85%

“…The design of a compensator to minimize these unwanted effects has recently been carried out and shows encouraging results. 42 Open-loop actuation signals are provided by a BK Precision 3011A function generator and amplified by a Crown D-150A amplifier. For closed-loop control, a dSPACE 1103 digital signal processing control board is used.…”

Section: Experimental Facility and Techniquesmentioning

confidence: 99%

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Effects of open-loop and closed-loop control on subsonic cavity flows

et al. 2007

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This work presents an experimental investigation of the effects of open-and closed-loop control techniques on the flow structure and surface pressure signature in subsonic cavity flows. The cases include the uncontrolled ͑baseline͒ Mach 0.30 flow over a shallow cavity of aspect ratio 4 with Reynolds number based on the cavity depth of 10 5 , and four actively controlled flows. The controlled cases include open-loop at two discrete frequencies and two closed-loop cases: parallel proportional with time delay and reduced-order model-based linear quadratic. Measurements and analyses include particle image velocimetry, spectra and spectrograms of surface pressure and velocity fluctuations, flow visualization, and proper orthogonal decomposition. Data are presented and analyzed in an effort to better understand the behavior of the cavity flow in response to a variety of actuation cases. Results show that both open-and closed-loop control have significant effects on the flow dynamics and surface pressure behavior. In addition, the results reveal substantial differences between the effects of each type of open-loop and closed-loop control.

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Section: Single Point Time-resolved Flow Resultsmentioning

confidence: 85%

Section: Experimental Facility and Techniquesmentioning

confidence: 99%

Effects of open-loop and closed-loop control on subsonic cavity flows

et al. 2007

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show abstract

“…This is justified by the fact that the actuation is produced through the motion of an acoustic diaphragm inside the actuator, which can only oscillate between a certain frequency range. Such a simple model will be sufficient for the purposes of this study; the reader interested in further details of the acoustic actuator and more sophisticated models of its dynamics is referred to [37]. The controller matrices , from e to col( ).…”

Section: » (47)mentioning

confidence: 99%

Control of nonlinear systems represented by Galerkin models using adaptation-based linear parameter-varying models

Kasnakoğlu

2010

Int. J. Control Autom. Syst.

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This paper studies the control of nonlinear Galerkin systems, which are an important class of nonlinear systems that arise in reduced-order modeling of infinite-dimensional systems. A novel approach is proposed in which a linear parameter-varying (LPV) model representing the Galerkin model is built, where the parameter variation is dictated by a specially designed adaptation scheme. The controller design is then carried out on the simpler LPV model, instead of dealing directly with the complicated nonlinear Galerkin system. An automatically scheduled H-infinity controller is designed using the LPV model, and it is proven that this controller will indeed achieve the desired stabilization when applied to the nonlinear Galerkin model. The approach is illustrated with an example on cavity flow control, where the design is seen to produce satisfactory results in suppressing unwanted oscillations.

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Influence of control device on store separation from an open cavity

Song

Zhao

et al. 2020

Aerospace Science and Technology

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Dynamic Compensation of a Synthetic Jetlike Actuator for Closed-Loop Cavity Flow Control

Cited by 6 publications

References 21 publications

Effects of open-loop and closed-loop control on subsonic cavity flows

Effects of open-loop and closed-loop control on subsonic cavity flows

Control of nonlinear systems represented by Galerkin models using adaptation-based linear parameter-varying models

Influence of control device on store separation from an open cavity

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