Novel, Bidirectional, Variable-Camber Airfoil via Macro-Fiber Composite Actuators

Bilgen, Onur; Kochersberger, Kevin; Inman, Daniel J.; Ohanian, Osgar John

doi:10.2514/1.45452

Cited by 120 publications

(78 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The advantages of the MFC technology over monolithic piezoelectrics include increased flexibility, improved actuation authority, and anisotropic behavior. These characteristics of MFCs have led to experimental applications including structural sensing and vibration control (Browning et al, 2009;Sodano et al, 2004), bio-inspired locomotion (Cen and Erturk, 2013;Erturk and Delporte, 2011), acoustic wave devices (Collet et al, 2011;Matt and Di Scalea, 2007), morphing-wing and flapping-wing structures (Bilgen et al, 2010;Kim et al, 2007;Kim and Han, 2006;Paradies and Ciresa, 2009), and in-air/underwater dynamic actuation or energy harvesting (Cha et al, 2013(Cha et al, , 2016Erturk and Delporte, 2011;Shahab and Erturk, 2014b, 2014c.…”

Section: Introductionmentioning

confidence: 99%

Coupling of experimentally validated electroelastic dynamics and mixing rules formulation for macro-fiber composite piezoelectric structures

Shahab

Ertürk

2016

Journal of Intelligent Material Systems and Structures

View full text Add to dashboard Cite

Piezoelectric structures have been used in a variety of applications ranging from vibration control and sensing to morphing and energy harvesting. In order to employ the effective 33-mode of piezoelectricity, interdigitated electrodes have been used in the design of macro-fiber composites which employ piezoelectric fibers with rectangular cross section. In this article, we present an investigation of the two-way electroelastic coupling (in the sense of direct and converse piezoelectric effects) in bimorph cantilevers that employ interdigitated electrodes for 33-mode operation. A distributedparameter electroelastic modeling framework is developed for the elastodynamic scenarios of piezoelectric power generation and dynamic actuation. Mixing rules (i.e. rule of mixtures) formulation is employed to evaluate the equivalent and homogenized properties of macro-fiber composite structures. The electroelastic and dielectric properties of a representative volume element (piezoelectric fiber and epoxy matrix) between two neighboring interdigitated electrodes are then coupled with the global electro-elastodynamics based on the Euler-Bernoulli kinematics accounting for twoway electromechanical coupling. Various macro-fiber composite bimorph cantilevers with different widths are tested for resonant dynamic actuation and power generation with resistive shunt damping. Excellent agreement is reported between the measured electroelastic frequency response and predictions of the analytical framework that bridges the continuum electro-elastodynamics and mixing rules formulation.

show abstract

Section: Introductionmentioning

confidence: 99%

Coupling of experimentally validated electroelastic dynamics and mixing rules formulation for macro-fiber composite piezoelectric structures

Shahab

Ertürk

2016

Journal of Intelligent Material Systems and Structures

View full text Add to dashboard Cite

show abstract

“…Modern aircrafts require active control of wing camber by means of flap and slat deflection for a variety of maneuvers including landing and takeoff. In recent decades, with the advancement of novel actuators and materials, the concept of morphing wings with smoothly varying camber was proposed, aiming to further improve the aerodynamic performance of modern aircrafts (Bilgen et al 2010;Santhanakrishnan et al 2005;Gupta and Ippolito 2012).…”

Section: Introductionmentioning

confidence: 99%

Aerodynamics of dynamic wing flexion in translating wings

et al. 2015

View full text Add to dashboard Cite

show abstract

“…In Ref. [6], a cantilever wing platform was designed and experimentally tested for the camber changes with active piezoelectric actuations. In rotorcraft application, the optimal airfoil design was studied for the control of airfoil camber.…”

Section: Introductionmentioning

confidence: 99%

Estimation of morphing airfoil shape and aerodynamic load using artificial hair sensors

Butler

Magar

et al. 2016

SPIE Proceedings

View full text Add to dashboard Cite

An active area of research in adaptive structures focuses on the use of continuous wing shape changing methods as a means of replacing conventional discrete control surfaces and increasing aerodynamic efficiency. Although many shapechanging methods have been used since the beginning of heavier-than-air flight, the concept of performing camber actuation on a fully-deformable airfoil has not been widely applied. A fundamental problem of applying this concept to real-world scenarios is the fact that camber actuation is a continuous, time-dependent process. Therefore, if camber actuation is to be used in a closed-loop feedback system, one must be able to determine the instantaneous airfoil shape as well as the aerodynamic loads at all times. One approach is to utilize a new type of artificial hair sensors developed at the Air Force Research Laboratory to determine the flow conditions surrounding deformable airfoils. In this work, the hair sensor measurement data will be simulated by using the flow solver XFoil, with the assumption that perfect data with no noise can be collected from the hair sensor measurements. Such measurements will then be used in an artificial neural network based process to approximate the instantaneous airfoil camber shape, lift coefficient, and moment coefficient at a given angle of attack. Various aerodynamic and geometrical properties approximated from the artificial hair sensor and artificial neural network system will be compared with the results of XFoil in order to validate the approximation approach.

show abstract

Novel, Bidirectional, Variable-Camber Airfoil via Macro-Fiber Composite Actuators

Cited by 120 publications

References 27 publications

Coupling of experimentally validated electroelastic dynamics and mixing rules formulation for macro-fiber composite piezoelectric structures

Coupling of experimentally validated electroelastic dynamics and mixing rules formulation for macro-fiber composite piezoelectric structures

Aerodynamics of dynamic wing flexion in translating wings

Estimation of morphing airfoil shape and aerodynamic load using artificial hair sensors

Contact Info

Product

Resources

About