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Zahoor, Y. (author), Sodja, J. (author), De Breuker, R. (author)
This paper presents an overview of the design and validation of a novel passive camber morphing system for rotorcraft. The passive system works for a variable speed rotor where a potential increase in pilot control authority and power reduction is possible. In the proposed concept, the rotor speed is varied by 10% to change the apparent...
conference paper 2022
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Carrillo Córcoles, X. (author), Mertens, C. (author), Sciacchitano, A. (author), van Oudheusden, B.W. (author), De Breuker, R. (author), Sodja, J. (author)
An aeroelastic wind tunnel experiment to identify the influence of the wing stiffness and hinge release threshold on the gust load alleviation performance of a folding wingtip design is presented in this study. Five models with different stiffness and tailoring properties are tested and the wing root bending moment at different conditions is...
conference paper 2022
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Pollack, T.S.C. (author), van Kampen, E. (author)
Incremental Nonlinear Dynamic Inversion (INDI) is a sensor-based control law design strategy that is based on the principles of feedback linearization. Contrary to its non-incremental counterpart (NDI), this design method does not rely on the availability of a high-fidelity on-board model of the airframe dynamics and is robust to aerodynamic...
conference paper 2022
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Dacome, G. (author), Schrijer, F.F.J. (author), van Oudheusden, B.W. (author)
The current study considers the configuration of a transverse jet in a supersonic crossflow that is interacting with an impinging oblique shock wave. The relevance of this configuration is associated to high-speed air-breathing propulsion systems, where a shock may be induced in the combustion chamber to enhance mixing. To investigate the...
conference paper 2022
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Fang, X. (author), de Visser, C.C. (author), Pool, D.M. (author), Holzapfel, Florian (author)
This paper proposes a new method that estimates the three-dimensional stochastic wind velocity for an aircraft equipped with a Pitot-static tube and airflow vanes. Since the performance of most state estimators, e.g., the extended Rauch-Tung-Striebel smoother, relies on the process and measurement noise covariance settings, the proposed method...
conference paper 2022
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Paul, Acquatella B. (author), van Kampen, E. (author), Chu, Q. P. (author)
This paper presents a sampled-data form of the recently reformulated incremental nonlinear dynamic inversion (INDI) applied for robust spacecraft attitude control. INDI is a combined model- and sensor-based approach mostly applied for attitude control that only requires an accurate control effectiveness model and measurements of the state and...
conference paper 2022
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Smit, B. (author), Pollack, T.S.C. (author), van Kampen, E. (author)
Control augmentation systems based on Incremental Nonlinear Dynamic Inversion (INDI) are able to provide high-performance nonlinear control without a holistic model. Considering an angular rate control law for a fixed-wing aircraft, only a control effectiveness (CE) model and angular acceleration measurement feedback is required. Despite...
conference paper 2022
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Terenzi, L. (author), Zaal, P.M.T. (author), Pool, D.M. (author), Mulder, Max (author)
Improved understanding of human adaptation can be used to design better (semi-)automated systems that can support the human controller when task characteristics suddenly change. This paper evaluates the effectiveness of a model-based adaptive control technique, Model Reference Adaptive Control (MRAC), for describing the adaptive control policy...
conference paper 2022
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Ruland, O.L. (author), Mkhoyan, T. (author), De Breuker, R. (author), Wang, Xuerui (author)
Morphing is a promising bio-inspired technology, with the potential to make aircraft more economical and sustainable through adaptation of the wing shape for best efficiency at any flight condition. This paper proposes an online black-box performance optimization strategy for a seamless wing with distributed morphing control. Pursuing global...
conference paper 2022
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Mkhoyan, T. (author), Wang, Xuerui (author), De Breuker, R. (author)
This study investigated the design and development of an autonomous aeroservoelastic wing concept with distributed flaps. This wing demonstrator was developed in the scope of the SmartX project, aiming to demonstrate in-flight performance optimization and multi-objective control with over-actuated wing designs. Following a successful test...
conference paper 2022
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Mertens, C. (author), Sodja, J. (author), Sciacchitano, A. (author), van Oudheusden, B.W. (author)
The aeroelastic response of a very flexible wing in steady and unsteady inflow conditions is measured in a wind tunnel experiment. An integrated aeroelastic characterization is performed with a non-intrusive optical setup that allows simultaneous measurements of the structural motion and the flow field around the wing. The experimental...
conference paper 2022
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Schiller, A. (author), Bisagni, C. (author)
Cylindrical shells are common structural elements in the aerospace sector due to their high load-carrying capacity per unit weight. Cutouts may, however, significantly reduce this load-carrying capacity, especially when cylindrical shells buckle under axial compression. Since the buckling load is often a crucial design parameter, it is important...
conference paper 2022
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Zoppini, G. (author), Ragni, D. (author), Kotsonis, M. (author)
The application of an isolated roughness element in the laminar boundary layer developing on the surface of a wing, introduces flow instabilities that eventually lead to the breakdown of the laminar flow structures and the formation of a turbulent wedge. The present work, investigates the instabilities and transition process initiated by an...
conference paper 2022
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Leemans, G. (author), Carzana, L. (author), Heiligers, M.J. (author)
This work demonstrates the usability of differential dynamic programming (DDP) to obtain optimal Earth-centred solar-sail trajectories. The dynamical model is implemented as a two-body problem, augmented with an ideal solar-sail reflectance model and accounts for eclipses. The numerical performance of the optimisation algorithm is enhanced by...
conference paper 2022
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Kumtepe, Y. (author), Pollack, T.S.C. (author), van Kampen, E. (author)
Incremental Nonlinear Dynamic Inversion (INDI) is a sensor-based control strategy, which has shown robustness against model uncertainties on various aerospace platforms. The sensor-based nature of the method brings attractive properties, which has made it popular in the last decade. INDI globally linearizes the system by making use of control...
conference paper 2022
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Schuurman, M.J. (author), De Breuker, R. (author), Kassapoglou, C. (author)
On the 15t hof December 1965 the motion picture “Flight of the Phoenix” was released in the United States of America theatres. In the closing movie credits the following text is shown:It should be remembered. . . that Paul Mantz, a fine man and a brilliant flyer gave his life in the making of this film. Who was Paul Mantz? What happened? And...
conference paper 2022
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Schuurman, M.J. (author), Rans, C.D. (author)
The Faculty of Aerospace Engineering at the Delft University of Technology has an active learning philosophy which is embedded in its curriculum. The first year project Design and Construction is run in the second semester. The course aims to provide “hands-on” experience to students in design and construction. Applying knowledge from courses...
conference paper 2022
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Newcamp, Jeffrey M. (author), Verhagen, W.J.C. (author), Curran, R. (author)
Aircraft fleet managers lack tools to aid decision-making for fleets nearing retirement, which leads to rushed and ill-informed decisions. Accordingly, aging aircraft fleets are underutilized and fleets can be retired before their useful lifetime has been expended. A decision support framework is proposed to solve the aging military aircraft...
conference paper 2022
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Ahrens, B.P. (author), Matthes, Ralph (author), Mörtberg, Anders (author)
In previous work ("From signatures to monads in UniMath"),we described a category-theoretic construction of abstract syntax from a signature, mechanized in the UniMath library based on the Coq proof assistant.<br/><br/>In the present work, we describe what was necessary to generalize that work to account for simply-typed languages. First, some...
conference paper 2022
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Jurisson, A. (author), De Breuker, R. (author), de Visser, C.C. (author), Eussen, Bart (author), Timmermans, H (author)
Netherlands Aerospace Centre (NLR) and Delft University of Technology (TUD) have obtained an unmanned aerial vehicle to serve as a test platform for future aeroservoelastic flight testing. The purpose of this testbed is to collect data about flexible aircraft flight dynamic responses and loads on the aircraft at unsteady airflow conditions for...
conference paper 2022
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