Salvatore Ameduri

Salvatore Ameduri
CIRA Centro Italiano Ricerche Aerospaziali | CIRA · STAD

About

109
Publications
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734
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Introduction

Publications

Publications (109)
Article
Full-text available
This paper focuses on the development and demonstration of a novel blade morphing system within a whirl tower facility. The scope is to investigate the behavior of the proposed architecture under representative loads, demonstrating its capability to alter the blade original shape in operation under centrifugal, aerodynamic, and internal forces. The...
Article
Full-text available
Shape memory alloy actuators have been studied for more than thirty years. Many experimental tests have been performed, and several patents have been registered. However, designing such devices is still a challenging task. On the one hand, models are not yet able to provide the accuracy required to replace a substantial portion of the experimental...
Article
Full-text available
In a previous paper, the authors dealt with the current showstoppers that inhibit commercial applicability of morphing systems. In this work, the authors express a critical vision of the current status of the proposed architectures and the needs that should be accomplished to make them viable for installation onboard of commercial aircraft. The dis...
Conference Paper
View Video Presentation: https://doi.org/10.2514/6.2022-1340.vid The object of this paper is the functionality test of a thermomechanical system aimed at twisting a blade segment through a Shape Memory Alloy (SMA) compact actuator. A dedicated sensing system was designed to reconstruct the actual shape of the device and support the logic of control...
Conference Paper
View Video Presentation: https://doi.org/10.2514/6.2022-0718.vid This paper summarizes the results of the design study and provides a description of three morphing wing devices developed for a turboprop regional aircraft in the framework of the Clean Sky 2 REG-IADP Airgreen 2 project. In sinergy with a natural laminar flow wing, morphing wing techn...
Conference Paper
View Video Presentation: https://doi.org/10.2514/6.2022-0717.vid This paper offers an overview of the Project of AIRGREEN2 (AG2, Clean Sky 2), in terms of main targets, technology development and maturation path, current achievements and further steps and perspective. Starting from the industrial and scientific scenario in which AG2 was conceived,...
Conference Paper
View Video Presentation: https://doi.org/10.2514/6.2022-1339.vid On July 1st, 2000, the Lab of Smart Structures was established at CIRA, among the first of that kind worldwide. The aim was to set an early foot within the recently newborn discipline, which was growing more and more in terms of attention and participation within the aerospace communi...
Preprint
In a previous paper, the authors dealt with the current showstoppers for morphing systems and with the reasons that have inhibited their commercial applicability. In this work, the authors ex-press a critical vision of the current status of the proposed architectures and the needs that should be accomplished to make them viable for installation onb...
Article
This paper gives an overview of some recent full-scale demonstrations of morphing devices capable of providing innovative capabilities to general systems in changing shape and improving performance significantly during operations. In aeronautics, large progress has been observed over the last few years, meaning that this technology is rapidly trans...
Article
Full-text available
Morphing aeronautical systems may be used for a number of aims, ranging from improving performance in specific flight conditions, to keeping the optimal efficiency over a certain parameters domain instead of confining it to a single point, extending the flight envelope, and so on. An almost trivial statement is that traditional skeleton architectur...
Chapter
Different strategies may be adopted to avoid ice formation, such as power-consuming active systems and passive coatings. Several categories of surface treatments with superhydrophobic/icephobic behavior have been developed in the last decade. The goal of the coating application is to repel water droplets, delay ice nucleation and significantly redu...
Chapter
In this paper, the identification of impact area that works only with the readout responses opportunely post processed, is proposed. The readouts signal is representative of a distributed high resolution strain map under backscattering random noise and static excitation. The algorithm is based on first order derivative operator already developed by...
Chapter
Shape memory alloys (SMAs) belong to a class of smart materials with the ability to memorize or retain their previous shape when subjected to external stimuli such as thermomechanical or magnetic gradients. SMAs have attracted significant attention and interest in in a broad range of commercial applications owing to their unique and superior proper...
Article
Debonding at two components interface (f.i., skin & stringer) is a common defect of composite stiffened structures. It may result from inefficient manufacturing or impacts from foreign objects. Discontinuities within an elastic solid medium under mechanical loads may cause local anomalies in the strain field. On this basis, the current work investi...
Article
The scope of this work is to provide a critical review on the expectations about the morphing wing technology against the current open issues and showstoppers. In synergy to other emerging and promising technologies, morphing is asked for bridging the evident gap between the current growth trend of the aerospace compartment and its impact onto the...
Article
Active blade twist is an option to increase helicopter performance, for instance moving its condition from hovering to cruise. Shape memory alloys give the possibility of realizing compact devices, with high energy density. Several devices have been proposed in literature, showing limitations in terms of effectiveness and necessary room. In this ar...
Conference Paper
The paper presents a numerical study about a de-icing system using ultrasonic waves. The activity is developed within the project “SMart On-Board Systems” (SMOS), which is part of Italian Aerospace National Research Program, funded by the Italian Ministry of Education (MIUR) and Research and coordinated by Italian Aerospace Research Centre (CIRA)....
Conference Paper
This work focuses on a surrogate predictive model, conceived to estimate the impact on blade twist law of a Shape Memory Alloy actuation system. The basic idea is to integrate the pre-existing blade structure with a pre-twisted SMA tube. Due to the specific property of recovering deformation during phase transition, the SMA element can transmit ang...
Conference Paper
This research intends to propose a structural integration methodology for a strain sensor based on nano-filled elastomer and its preliminary bonding strength characterization. To provide a good strength adhesion onto a structural component, a special mould was designed, made of Acrilonitrile butadiene styrene (ABS) material and realised with a 3D p...
Conference Paper
The paper at hand focuses on the modeling and design of an experimental demonstrator of a blade segment, twisted through Shape Memory Alloy technology. The demonstrator will be used for the wind tunnel tests planned within the Project of SABRE (H2020 Eu Program), aimed at investigating the effects produced by blade oriented morphing technologies, b...
Conference Paper
It is not a case the session on “Adaptive Structures for Aeronautical Applications” within AIDAA XXV has been jointly organised by the Politecnico of Milano, the University of Napoli and the Italian Aerospace Research Centre (CIRA). Those organisations have been producing substantial work within the National frame on that topic and are more and mor...
Article
Full-text available
The work at hand focuses on the modeling, prototyping, and experimental functionality test of a smart actuator based on shape memory polymer technology. Particular attention is paid to the specific modeling approach, here conceived as an effective predictive scheme, quick and, at the same time, able to face those nonlinearity aspects, strictly rela...
Article
A multi-scaled W&B demonstrator able of reproducing the same loading condition of an aircraft as a whole is designed, manufactured and experimentally characterized. Two laws of similarity guided the design of the demonstrator, concerning geometrical and weight aspects. Total weight and center of gravity position, including payloads are calculated s...
Article
Full-text available
Within the framework of the Clean Sky-JTI (Joint Technology Initiative) project, the design and technological demonstration of a novel wing flap architecture were addressed. Research activities were carried out to substantiate the feasibility of morphing concepts enabling flap camber variation in compliance with the demanding safety requirements ap...
Article
Full-text available
The work at hand focuses on an adaptive system aimed at improving the soundproof performance of car door seals at specific regimes (cruise), without interfering with the conventional opening and closing operations. The idea addresses the necessity of increasing seal effectiveness, jeopardized by aerodynamic actions that strengthen as the speed incr...
Preprint
The work at hand focuses on an adaptive system aimed at improving the soundproof performance of car door seals at specific working regimes (cruise), without interfering with the conventional open-closure operations. The idea addresses the necessity of increasing the seal effectiveness, jeopardized by aerodynamic actions more and more important as t...
Conference Paper
Aircraft wing design optimization typically requires the consideration of many competing factors accounting for both aerodynamics and structures. To address this, research on morphing aircraft has shown its potential by providing large benefits on aircraft performance. In particular, by adapting wing lift distribution, morphing winglets are capable...
Conference Paper
By introducing the progresses on Morphing currently achieved within the European Project “AIRGREEN2”, in Clean-Sky 2 GRA platform, this work presents a review of the research step forwards accomplished in the last decade by three Italian Partners largely active in the field: the Italian Aerospace Research Centre, the University of Naples “Federico...
Article
We report on the use of Fiber Bragg Grating (FBG) sensors integrated onto an aircraft landing gear for remote and real-time load monitoring. Several FBGs strain sensors, both in a linear and tri-axial configuration, have been integrated on different locations of true landing gears (both Main and Nose gears) based on their load condition derived fro...
Conference Paper
The present work, developed within the National Project “New Technologies and Materials for Vehicle Noise Abatement”, LowNoise, focuses on a system able to improve the car door adhesion level in cruise condition, through a SMA based expanding system, integrated within the seal socket. The SMA is activated only in cruise, while is turned off during...
Conference Paper
In recent years, the multi acoustic sensors systems have had a major development thanks to their versatility in different fields. These systems, also called acoustic antennas, consist of a set of microphones distributed according to linear, planar or three-dimensional geometries. The acoustic signals detected by the microphones are processed in ord...
Chapter
Morphing of metallic wing structures has fascinated generations of researchers; numerous and sometimes bizarre architectures have been proposed, tailored to specific end-applications and aircraft type. Although different for layout, all of them can be categorized in two basic groups: mechanized architectures and compliant mechanisms.Mechanized arch...
Article
The objective of this work is to present a conceptual design and the modelling of a distributed sensor system based on fiber optic devices (Fiber Bragg Grating. FBG). aimed at measuring span-wise and chord-wise variations of an adaptive (morphing) trailing edge. The network is made of two different integrated solutions for revealing deformations of...
Article
The design, manufacturing and preliminary testing of a smart patch sensor named MonitoRing, are herein presented. The sensor is conceived to identify amplitude and direction of structural loads by distributed strain profile detection along its circular geometry. The sensor is manufactured by using flexible glass/epoxy laminates hosting a single sta...
Article
Full-text available
In the work at hand, a shape memory alloy (SMA)-based system is presented. The system, conceived for releasing environmental sensors from ground or small unmanned aerial vehicles, UAV (often named UAS, unmanned aerial system), is made of a door, integrated into the bottom of the fuselage, a device distributor, operated by a couple of antagonistic S...
Article
In this paper, the activities carried out within the EU funded Clean Sky Joint Technology Initiative (JTI GRA) Project and aimed at developing a morphing flap, are illustrated. The reference device is a regional aircraft single slotted flap, enhanced with deforming capabilities to obtain improved hyper-lift performance. The design started with the...
Article
Shape memory alloys materials, SMA, offer several advantages that designers can rely on such as the possibility of transmitting large forces and deformations, compactness, and the intrinsic capability to absorb loads. Their use as monolithic actuators, moreover, can lead to potential simplifications of the system, through a reduction of number of p...
Chapter
The design and the sizing of an actuation system are performed on the basis of specifications that the actuator itself, as part of an integrated system, has to meet. Among these requirements one recalls the intensity of the forces and of the displacements to be transmitted, the frequency bandwidth, the necessary power supply, the weight, the size,...
Article
Full-text available
The object of this work is the conceptual design and modelling of a transducer based on fibre optic sensor and conceived to measure rotations of rigid components around a pivot. The device, namely, post-buckling-fibre Bragg grating, is constituted of a flexible metal plate hosting a fibre Bragg grating strain sensor; the edges of the plates are hin...
Conference Paper
The measurement of large deformations represents a challenging issue for many engineering applications. To name a few, morphing and deployable aerospace structures, due to the intrinsic large deformations, require dedicated sensing systems able to capture the current geometry (shape reconstruction) and to detect the stress level (structural health...
Article
In the work at hand, the development of a morphing flap, actuated through shape memory alloy load bearing elements, is described. Moving from aerodynamic specifications, prescribing the morphed shape enhancing the aerodynamic efficiency of the flap, a suitable actuation architecture was identified, able to affect the curvature. Each rib of the flap...
Article
An original sensor system based on Fiber Bragg Gratings (FBG) for the strain monitoring of an adaptive wing element is presented in this paper. One of the main aims of the SARISTU project is in fact to measure the shape of a deformable wing for performance optimization. In detail, an Adaptive Trailing Edge (ATE) is monitored chord- and span-wise in...
Article
An original Monito-Ring system based on chirped fiber optic and draw tower grating array is presented. The target of this research activity is the realization of a device able to measure deformations of morphing structures which may show large, global displacements due to nonstandard architectures and materials adopted. The occurring strain field r...
Article
Nowadays, acoustic antennas are used in different application fields with the primary aim of detecting the presence and the position of acoustic sources. The uncertainty in the evaluation of the acoustic source position is related to the knowledge of right acoustic locations of the microphones in the array, which is different from the geometric one...
Conference Paper
Full-text available
An original monitoring (Monito-Ring) system based on chirped grating fiber optic sensor for structural strain modulation is presented. One of the main targets is to measure deformations of deformable morphing structures which may show large, global displacements. During operation, indeed, it is not often possible to connect sensors directly to the...
Article
This paper analyses a morphing leading edge device, activated by a Shape Memory Alloy (SMA) actuator. The objective is to achieve the Droop Nose effect for particular phases of the flight (e.g. take-off, landing), both obtaining an increased lift and preserving the laminar flow. The device is constituted of: a kinematic chain at the level of the wi...
Article
Full-text available
One of the most common applications of the acoustic antennas is the detection and the localization of sources. The geometric distribution of the sensors is not the only parameter that influences the measure; also the electromechanical features of the microphones play an important role, strongly affecting the delay of the signals. For this reason, a...
Conference Paper
Full-text available
One of the most common applications of the acoustic antennas is the detection and the localization of acoustic sources. Different parameters (geometric position of the microphones in the array, distance between antenna and the sources, quality of the used microphones, data acquisition system, and so on) influence the quality of the measure of acous...
Article
In the paper at hand, the conceptual design of a UAV deployable landing gear, based on Shape Memory Alloy (SMA) technology, is presented. The system, made of four legs, whose rotary motion is commanded by SMA torque springs acting around pivots, is supposed to favor the landing task, absorbing impact loads. A dedicated numerical tool was realized a...
Article
The work at hand illustrates numerical and experimental investigations on the use of Lamb waves for detaching ice onto aerodynamic surfaces. The waves, generated through piezoelectric patches bonded onto the inner surface of the wing skin, cause a shear action at the ice/skin interface. The magnitude of the shear action is amplified at specific exc...
Article
The object of this work is the conceptual design and modeling of a sensor based on Fiber Optic technology and conceived to measure rotations of rigid components around a pivot. The device, namely PB-FBG, is constituted of a flexible plate integrated with a FBG sensor; the edges of the plates are hinged onto the rotating rigid bodies, eccentrically...
Article
In this work, a design strategy is presented, addressed to adaptive structural systems, driven by shape memory alloy actuators. The peculiar behaviour of shape memory alloy materials, non-linear and fully dependent on three parameters (stress, strain and temperature), and the load path itself complicate the numerical simulation process. This is eve...
Conference Paper
This article deals with the modeling of a strain-displacement transducer conceived for extending the FBG measurement range. The intrinsic fragility of the optical fiber limits their application to cases characterized by relatively small deformations. To extend the employ to the large displacement field (i.e. morphing applications), a dedicated devi...
Conference Paper
Different aspects make SMA materials good candidate for aerospace applications: ability in transmitting large forces and displacements, compactness, capability of the material in absorbing loads (this way cooperating with the surrounding hosting structure), potential simplification of the system (reduction of the global system complexity and of the...
Conference Paper
Full-text available
Nowadays, acoustic antennas are used in different application fields with the primary aim to detect the presence and the position of acoustic sources. The uncertainty in the evaluation of the acoustic source position is related to the knowledge of right acoustic locations of the microphones in the array, that is different from the geometric ones, a...
Conference Paper
The growing interest in the use of acoustic antennas in different fields justifies the increasing attention on calibration problems related to them. This paper focuses on the calibration problems of acoustic antennas proposing a dedicated strategy with the aim of assessing an optimized experimental setup guaranteeing the maximum accuracy. The effec...
Patent
Full-text available
A wing-flap assembly includes a flap made up of a plurality of flap sections, in which each flap section is connected to the preceding one in a rotatable manner, and one or more actuator devices adapted to control the rotation of the flap sections. Each actuator device includes an extended element made of shape memory alloy and an arch-shaped frame...
Conference Paper
Full-text available
Air traffic control is a key activity for airport management services to meet increased security and a low environmental impact on people living in the surrounding area. In the GUARDIAN project, funded by the Italian Ministry of Education, University and Research, an innovative passive SODAR (SOnic Detection And Ranging), has been successfully desi...