Active Aeroelastic Control of 2-D Wing-Flap Systems in an Incompressible Flowfield

Librescu, Liviu; Na, Sungsoo; Marzocca, Piergiovanni; Chung, Chanhoon; Kwak, Moon Kyu

doi:10.2514/6.2003-1414

Cited by 6 publications

(4 citation statements)

References 14 publications

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“…These aeroelastic phenomena can significantly influence the performance of the vehicle. Moreover, the tendency to reduce weight, increase structural flexibility and operating speed certainly increases the likelihood of the flutter occurrence within the vehicle operational envelope [1][2][3][4][5][6][7] . However, aerospace systems inherently contain complex interaction of structural and aerodynamic nonlinearities [8] .…”

Section: Introductionmentioning

confidence: 99%

Non-linear aerothermoelastic modeling and behavior of a double-wedge lifting surface

Abbas

Rui

Marzocca

2009

J. Shanghai Jiaotong Univ. (Sci.)

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The design of the re-entry space vehicles and high-speed aircraft structures requires special attention to the non-linear thermoelastic and aerodynamic instabilities. The thermal effects are important since temperature environment influences significantly the static and dynamic behaviors of flight structures in supersonic/hypersonic regimes. The dynamic behavior of a double-wedge lifting surface with combined freeplay and cubic stiffening structural nonlinearities in both plunging and pitching degrees-of-freedom (DOF) operating in supersonic/hypersonic flight speed regimes has been analyzed. In addition a third order piston theory aerodynamics (PTA) is used to evaluate the non-linear unsteady aerodynamic loads applied to the wing section. Loss of torsional stiffness that may be incurred by lifting surfaces subjected to axial stresses induced by aerodynamic heating is also considered. The aerodynamic heating effect is estimated based on the adiabatic wall temperature due to high speed airstreams. It is demonstrated that serious losses of torsional stiffness may occur in such lifting surfaces; the influence of various parameters such as flight condition, thickness ratio, freeplays and pitching stiffness nonlinearity are discussed.

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Section: Introductionmentioning

confidence: 99%

Non-linear aerothermoelastic modeling and behavior of a double-wedge lifting surface

Abbas

Rui

Marzocca

2009

J. Shanghai Jiaotong Univ. (Sci.)

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“…In addition to the well-known structural terms, see [Marzocca 2002a[Marzocca , 2002bLibrescu et al, 2003aLibrescu et al, , 2003b, the aerodynamic lift and moment forces are represented by Q h , Q α respectively. The lift and moment are derived by summing the forces in each degree of freedom in equilibrium.…”

Section: Aeroelastic Modelmentioning

confidence: 99%

“…Moreover, combat aircraft can experience, during their operational life, dramatic reductions of the flutter speed that can affect their survivability [Marzocca et al, 2001[Marzocca et al, , 2002a[Marzocca et al, , 2002bLibrescu et al, 2002Librescu et al, , 2003aLibrescu et al, , 2003bQin et al, 2002]. The mission profile of the next generation of UAV will probably lead to a configuration requirement of an adaptable airframe to best meet the varying flight conditions.…”

Section: Introductionmentioning

confidence: 99%

Active Aeroelastic Control of Lifting Surfaces via Jet Reaction Limiter Control

Rubillo

Marzocca

Bollt

2006

Int. J. Bifurcation Chaos

Self Cite

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In this paper we present, the design and modeling of the novel nonlinear limiter control feedback control plant [Myneni et al., 1999;Corron et al., 2000;Corron & Pethel, 2002], applied for the first time here in an aeroelastic system, and actuated as a jet reaction torquer control of a wing with potentially chaotic dynamics. This study will provide a better understanding of the nonlinear dynamics of the open/closed-loop aeroelasticity of flexible wings with either steady or unsteady aerodynamic loads. The limiter control can be applied to either the plunging or pitching characteristic of the wing or to both of them. We show that the control can effectively suppress Limit Cycle Oscillations (LCO) and chaos well beyond the nominal flutter speed. This could lead to a practical implementation of the control mechanism on actual and future generation aircraft wings via implementation of a combination of propulsive/jet type forces, micro surface effectors and fluidic devices. Analysis of this control produced favorable results in the suppression of LCO amplitude and increased flutter boundaries for plunging and pitching motion. The limiting control has asymptotically zero power, and is simply implemented, making it a feasible solution to the problem of the chaotic dynamics of the oscillating airfoil.

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“…These may dramatically influence the performance of flight vehicles. Moreover, the tendency of H. Guo ( ) · Y. Chen School of Astronautics, Harbin Institute of Technology, Harbin 150001, China e-mail: hulunguo@yahoo.cn the next generation of aeronautical and space vehicles is towards low weight and high structural flexibility [1][2][3]. However, these will enhance nonlinearities in both structure and aerodynamic loads.…”

Section: Introductionmentioning

confidence: 96%

Supercritical and subcritical Hopf bifurcation and limit cycle oscillations of an airfoil with cubic nonlinearity in supersonic\hypersonic flow

Guo

Chen

2011

Nonlinear Dyn

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In this paper, the Hopf bifurcations and limit cycle oscillations (LCOs) of an airfoil with cubic nonlinearity in supersonic\hypersonic flow are investigated. The harmonic balance method and multivariable Floquet theory are applied to analyze the LCOs of the airfoil. Four distinct cases of the LCOs response are detected in this system: (I) supercritical Hopf bifurcation, (II) a single subcritical Hopf bifurcation, (III) two subcritical Hopf bifurcations, and (IV) no Hopf bifurcation. Furthermore, the parameter variations domains separating the supercritical and subcritical Hopf bifurcations are presented using singularity theory.

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Active Aeroelastic Control of 2-D Wing-Flap Systems in an Incompressible Flowfield

Cited by 6 publications

References 14 publications

Non-linear aerothermoelastic modeling and behavior of a double-wedge lifting surface

Non-linear aerothermoelastic modeling and behavior of a double-wedge lifting surface

Active Aeroelastic Control of Lifting Surfaces via Jet Reaction Limiter Control

Supercritical and subcritical Hopf bifurcation and limit cycle oscillations of an airfoil with cubic nonlinearity in supersonic\hypersonic flow

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