Wind tunnel test and analysis on gust load alleviation of a transport-type wing

2023

Aerospace

This paper presents the design of an innovative wingtip device actively actuated to control the aeroelastic loads, with a focus on the gust load alleviation. It summarizes the work carried out in the Clean Sky 2 AIRGREEN2 project, where the device was developed from scratch and reached a relevant technology readiness level with the full-scale prototype manufacturing and testing, compulsory to obtain the permit to fly. This paper describes the overall design of the devices, covering the structure, the aero-servo-elasticity characteristics of the whole aircraft, the actuation system design, the scaled wind tunnel testing, and the full-scale structural qualification tests. The paper proves how the development of a new item involves several disciplines simultaneously, remarking on the importance of an integrated approach to the new generation aircraft design.

Section: The Active Wingtip Conceptmentioning

confidence: 99%

Development of an Active Wingtip for Aeroelastic Control

2023

Aerospace

“…There are also examples of aircraft equipped with control surfaces dedicated to gust alleviation, like the GLAS surface mounted on the B-23 and the Direct Lift Control (DLC) flaps mounted on the ATTAS aircraft [7]. Dedicated control surfaces were also studied in wind tunnel models, in [8] a trailing edge surface was used for load alleviation but resulted not very effective, different configurations of wing tip surfaces were applied to the EuRAM model [9] and a series of numerical studies [10], [11] provide an example of the good performances of the devices. A canard was used in the wind tunnel test described in [12] complementing the use of a split aileron, while a set of four trailing edge flaps is under investigation by NASA in the so-called VCCTEF [13] with the purpose of giving to the controller the possibility to alleviate the gust loads without affecting the capability to maneuver the aircraft.…”

Section: Introductionmentioning

confidence: 99%

Design and Experimental Validation of Gust Load Alleviation Systems based on Static Output Feedback

AIAA SCITECH 2022 Forum

Marchetti

et al. 2022

“…2 There are also examples of aircraft equipped with control surfaces dedicated to gust alleviation, like the GLAS surface mounted on the B-2 3 and the Direct Lift Control (DLC) flaps mounted on the ATTAS aircraft. 4 Dedicated control surfaces were also studied in wind tunnel models, in 5 a trailing edge surface was used for load alleviation but resulted not very effective, different configurations of wing tip surfaces were applied to the EuRAM model 6 and a series of numerical studies 7,8 provide an example of the good performances of the devices. A canard was used in the wind tunnel test described in 9 complementing the use of a split aileron, while a set of four trailing edge flaps and a leading edge surface were used on the sensorcraft wing in, 10 with the purpose of giving to the controller the possibility to alleviate the gust without affecting the capability to manoeuvre the aircraft.…”

Section: Introductionmentioning

confidence: 99%

Design of a wing tip device for active maneuver and gust load alleviation

Fonte

2018 AIAA/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference

2018

In the present work the design of a wing tip device is presented along with the definition of the maneuver load controller and the gust load controller. A parametric sensitivity study has been performed to define the aerodynamic shape of the device, considering its effect on the dynamic properties of the aeroelastic system. After defining the aerodynamic shape the maneuver load alleviation controller and the gust load alleviation controller are described, the former is obtained by finding the distribution of surface deflections that can minimize the internal loads in a trim condition, while for the latter two different strategies are compared, one based on a static output feedback controller and the second based on a recurrent neural network controller. The active wing tip extension designed results able to contribute to the alleviation of wing dynamic loads and can compensate the increment of such loads resulting from the span extension.