Discussion on “Active aeroelastic control of 2-D wing-flap systems operating in an incompressible flowfield and impacted by a blast pulse” by Librescu et al., Journal of Sound and Vibration 283 (3–5) (2005) 685–706

Mozaffari-Jovin, S.; Firouz-Abadi, R. D.; Roshanian, Jafar; Ghaffari, Ali

doi:10.1016/j.jsv.2012.10.006

Cited by 6 publications

(9 citation statements)

References 6 publications

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“…The hinge torques u and u g of the TE and LE-flaps, respectively, are taken as control inputs. The aeroelastic governing equations are developed based on the model proposed by Mozaffari-Jovin et al (2013), Edwards (1977) and Librescu et al (2005) where L(t) represents the unsteady aerodynamic load, m s is the total mass of wing and flaps per unit length, b is the semi-chord, the DOF vector…”

Section: -Dof Aeroelastic Modelmentioning

confidence: 99%

Adaptive aeroelastic control of nonlinear airfoil with multiple flaps under unsteady flow

Zhang

Marzocca

Behal

2015

Journal of Vibration and Control

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In this paper, a fully adaptive control design is considered for a four-degree-of-freedom aeroelastic system that has structural nonlinearities and operates in an unsteady aerodynamic incompressible flowfield. By using the flap hinge torque of a trailing-edge flap surface in combination with a leading-edge active flap, a closed-loop controller that adapts for uncertainties in the system parameters is designed. An implicit observer is implemented in the control design to compensate for lack of measurements of the lag states that model the unsteady flow. The innovative Lyapunov-based control design procedure results in a partial-state feedback adaptive controller that is globally asymptotically stable. Numerical simulation results show the effectiveness of the control strategy; comparative simulations are run to illustrate the benefit of using twin flaps as opposed to the conventional single flap control design.

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Section: -Dof Aeroelastic Modelmentioning

confidence: 99%

Adaptive aeroelastic control of nonlinear airfoil with multiple flaps under unsteady flow

Zhang

Marzocca

Behal

2015

Journal of Vibration and Control

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“…The aeroelastic governing equations are developed based on the model proposed in York (1980), Librescu et al (2005) and Mozaffari-Jovin et al (2013):…”

Section: Mathematical Modelmentioning

confidence: 99%

Continuous robust control for aeroelastic vibration control of a 2-D airfoil under unsteady flow

Zhang

Behal

2014

Journal of Vibration and Control

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In this paper, a particular class of 2-D aeroelastic systems accounting for structural nonlinearities in pitching displacement and operating in an unsteady aerodynamic incompressible flowfield description is considered. By using the flap hinge torque of a trailing-edge flap surface as the control input, a continuous controller is proposed to suppress the aeroelastic vibrations of the wing section model. The control design based on the choice of the pitching angle as the output variable yields a semi-global asymptotic stability result. Furthermore, the system is theoretically shown to be robust to external disturbances. Numerical simulation results verify the efficacy of the proposed control strategy toward suppressing aeroelastic vibration in both pre-and post-flutter flight speed regimes under a multitude of external disturbances.

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“…They obtained the model by invoking Jones' exponential approximation of Wagner's indicial loading function and Laplace transform of the airload expressions. Also, through an alternative integro-differential scheme [12], York [13] developed another state-space model of the same airfoil-aileron configuration, requiring subsequent corrections which have been recently discussed by Mozaffari-Jovin et al [14,15]. Many scholars have adopted these two state-space models for linear and nonlinear flutter analyses as well as in the design of active control systems for flutter suppression and atmospheric turbulence alleviation.…”

mentioning

confidence: 99%

Flutter of wings involving a locally distributed flexible control surface

Mozaffari-Jovin

Firouz-Abadi

Roshanian

2015

Journal of Sound and Vibration

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Discussion on “Active aeroelastic control of 2-D wing-flap systems operating in an incompressible flowfield and impacted by a blast pulse” by Librescu et al., Journal of Sound and Vibration 283 (3–5) (2005) 685–706

Cited by 6 publications

References 6 publications

Adaptive aeroelastic control of nonlinear airfoil with multiple flaps under unsteady flow

Adaptive aeroelastic control of nonlinear airfoil with multiple flaps under unsteady flow

Continuous robust control for aeroelastic vibration control of a 2-D airfoil under unsteady flow

Flutter of wings involving a locally distributed flexible control surface

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