Adaptive Disturbance Rejection for Flow in a Duct with Time-Varying Upstream Velocity

Santillo, Mario; Hoagg, Jesse B.; Bernstein, Dennis S.; Powell, Kenneth G.

doi:10.1109/acc.2007.4282917

Cited by 2 publications

(1 citation statement)

References 45 publications

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“…6 In addition, adaptive control techniques have been applied to a variety of flow control problems. [7][8][9][10][11] In particular, Ref. 7, 8 use extremum seeking methods to control the drag on a bluff body.…”

Section: Introductionmentioning

confidence: 99%

Retrospective Cost Adaptive Flow Control Using a Dielectric Barrier Discharge Actuator

Fledderjohn

Cho

Hoagg

et al. 2009

AIAA Guidance, Navigation, and Control Conference

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Retrospective cost adaptive control is applied to low Reynolds number aerodynamics around an SD7003 airfoil with a dielectric barrier discharge (DBD) actuator located near the leading edge. The adaptive control algorithm uses knowledge of Markov parameters to capture information about any nonminimum-phase zeros in the dynamics. In this paper, we explore the impact of the adaptive controller on the aerodynamics under the chord Reynolds numbers of 300 and 60,000, and with both steady and unsteady free-stream conditions. By varying the voltage to the DBD actuator, effective control of unsteady flow structure can be performed to decrease drag and increase lift. Nomenclature E Electric field vector F avg Quasi-steady body force from the DBD actuator F 1 , F 2 Body forces in the x 1 and x 2 directions q i Electric charge of a species n i Particle number density of a species ρ c Net charge density q c Unit electric charge (= 1.6 × 10 −19 C) c Chord length of airfoil U Free stream velocity C l Lift coefficient of an airfoil, which is the integral over the surface of the airfoil of the normalized pressure force in the direction of lift C d Drag coefficient of an airfoil, which is the integral over the surface of the airfoil of the normalized pressure force in the direction of drag V app Voltage applied to the DBD actuator U t/c Normalized time in the flow simulation Re Reynolds number * Graduate student, AIAA Student Member.

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Section: Introductionmentioning

confidence: 99%

Retrospective Cost Adaptive Flow Control Using a Dielectric Barrier Discharge Actuator

Fledderjohn

Cho

Hoagg

et al. 2009

AIAA Guidance, Navigation, and Control Conference

View full text Add to dashboard Cite

show abstract

Adaptive flow control of low-Reynolds number aerodynamics using dielectric barrier discharge actuator

Cho

Shyy

2011

Progress in Aerospace Sciences

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The aerodynamics of micro air vehicles (operating at the chord Reynolds number of 10 5 or below) is substantially influenced by the unsteadiness of the wind gust and the aircraft's light weight. In this effort, we investigate the active flow control of the dielectric barrier discharge actuator for flows around the SD7003 airfoil, with the chord Reynolds number of 6×10 4 , to enhance our understanding of the unsteady aerodynamics. Using a recently developed ARMARKOV/Toeplitz control scheme, the characteristics of the adaptive control in response to the fluctuation of the free stream, and impact on the aerodynamics are probed. By varying the voltage amplitude to the DBD actuator, effective control of unsteady flow structure can be performed to attain a desirable lift.

show abstract

Adaptive Disturbance Rejection for Flow in a Duct with Time-Varying Upstream Velocity

Cited by 2 publications

References 45 publications

Retrospective Cost Adaptive Flow Control Using a Dielectric Barrier Discharge Actuator

Retrospective Cost Adaptive Flow Control Using a Dielectric Barrier Discharge Actuator

Adaptive flow control of low-Reynolds number aerodynamics using dielectric barrier discharge actuator

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