On the Importance of Morphing Deformation Scheduling for Actuation Force and Energy

Breuker, Roeland De; Werter, Noud

doi:10.3390/aerospace3040041

Cited by 5 publications

(4 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The fixed-wing UAV equipped with a simplified structure and aerodynamically efficient design is advantageous to long-range and autonomous flight at high speeds. De Breuker et al (2016) suggest that these types of the aircraft face various flight conditions and require a detailed design of the shape and structure of the wing to obtain the highest aerodynamic efficiency. One of the most popular constructions of the fixed wing UAV (pure glider) UAV (Fig.…”

Section: Introductionmentioning

confidence: 99%

Vibration damping characteristics of the cork-based composite material in line to frequency analysis

Karpenko¹,

Nugaras²

2022

Journal of Theoretical and Applied Mechanics

View full text Add to dashboard Cite

The conducted research suggests possibility of replacing extruded polystyrene with a renewable cork-based material in laminated composite structures. Different fractions of the cork-based material of a composite laminate have been applied. The composites have been tested employing a hammer-focused vibration method. Conforming to obtained results, the cork-based material of smaller fraction has damping properties similar to those of the extruded polystyrene composite. Integrating cork into the structure of the composite has the opportunity to develop a more eco-friendlier and sustainable product and to improve the adaptive properties of passive control systems used for vibration damping applications operating in the middle and high frequency zones.

show abstract

Section: Introductionmentioning

confidence: 99%

Vibration damping characteristics of the cork-based composite material in line to frequency analysis

Karpenko¹,

Nugaras²

2022

Journal of Theoretical and Applied Mechanics

View full text Add to dashboard Cite

show abstract

“…Hence, they are most efficient during cruising, but the performance during other flight scenarios, like takeoff and landing, is sub-optimal. Smaller aircrafts, like unmanned aerial vehicles (UAVs), exhibit various flight conditions, and therefore need wings that can adapt to those conditions while remaining aerodynamically efficient [2]. Lightweight continuous morphing wings capable of transforming in flight are desired for improving the overall flight performance and efficiency.…”

Section: Introductionmentioning

confidence: 99%

Parametric Study of a Composite Skin for a Twist-Morphing Wing

Bishay

Aguilar

2021

Aerospace

View full text Add to dashboard Cite

Although the benefits of morphing wings have been proven in many studies in the last few decades, the wing skin design remains one of the challenges to advancing and implementing the morphing technology. This is due to the conflicting design requirements of high out-of-plane stiffness to withstand aerodynamic loads and low in-plane stiffness to allow morphing with the available actuation forces. Advancements in the design of hybrid and flexible composites might allow for design solutions that feature this balance in stiffness required for this application. These composites offer new design parameters, such as the number of plies, the fiber-orientation angle of each ply in the skin laminate, and the spatial distribution of the plies on the skin surface. This paper presents a parametric study of a composite skin for a twist-morphing wing. The skin is made of periodic laminated composite sections, called “Twistkins”, integrated in an elastomeric outer skin. The twisting deformation is localized in the elastomeric sections between the Twistkins. The design parameters considered are the number of plies in the composite Twistkins, the fiber-orientation angle of the plies, the torsional rigidity of the elastomer, the width ratio, and the number of elastomeric sections. The computational analysis results showed that the torsional compliance can be increased by increasing the width ratio, decreasing the number of elastomeric sections, number of composite plies and the elastomer’s torsional rigidity. However, this would also lead to a decrease in the out-of-plane stiffness. The nonlinearity and rates at which these parameters affect the skin’s behavior are highlighted, including the effect of the fiber-orientation angle of the laminate plies. Hence, the study guides the design process of this twist-morphing skin.

show abstract

“…Investigations on the importance of morphing scheduling and flight condition on the actuation force and energy requirements show that these factors can be determinants of the assessment of the viability of a morphing device [16].…”

Section: Introductionmentioning

confidence: 99%

Experimental Validation and Evaluation of a Coupled Twist-Camber Morphing Wing Concept

2021

View full text Add to dashboard Cite

A morphing wing concept allowing for coupled twist-camber shape adaptation is proposed. The design is based on an optimized thickness distribution both spanwise and chordwise to be able to morph the wing sections into targeted airfoil shapes. Simultaneously, the spanwise twist is affected by the actuation. The concept provides a higher degree of control on the lift distribution which can be used for roll control, drag minimization, and active load alleviation. Static deformation and flight tests have been performed to evaluate and quantify the performance of the proposed mechanism. The ground tests include mapped actuated wing shapes, and wing mass and actuation power requirements. Roll authority, load alleviation, and aerodynamic efficiency estimates for different configurations were calculated using a lifting line theory coupled with viscous 2D airfoil data. Roll authority was estimated to be low when compared to a general aviation aircraft while the load alleviation capability was found to be high. Differences between the lift to drag ratio between the reference and morphing wing configurations are considerable. Mass and actuation energy present challenges that can be mitigated. The flight tests were used to qualitatively assess the roll control capability of the prototype, which was found to be adequate.

show abstract

On the Importance of Morphing Deformation Scheduling for Actuation Force and Energy

Cited by 5 publications

References 18 publications

Vibration damping characteristics of the cork-based composite material in line to frequency analysis

Vibration damping characteristics of the cork-based composite material in line to frequency analysis

Parametric Study of a Composite Skin for a Twist-Morphing Wing

Experimental Validation and Evaluation of a Coupled Twist-Camber Morphing Wing Concept

Contact Info

Product

Resources

About