Dr. Roelof Vos Profile

Dr. Roelof Vos

at Technische Univ Delft

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Publications (7)

Proceedings Article | 27 April 2011 Paper

Topology optimization of pressure adaptive honeycomb for a morphing flap

Roelof Vos, Jan Scheepstra, Ron Barrett

Proceedings Volume 7977, 79771J (2011) https://doi.org/10.1117/12.880359

KEYWORDS: Skin, Aerodynamics, Actuators, Manufacturing, Matrices, Control systems, Solids, Finite element methods, Structural design, Transducers

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The paper begins with a brief historical overview of pressure adaptive materials and structures. By examining avian anatomy, it is seen that pressure-adaptive structures have been used successfully in the Natural world to hold structural positions for extended periods of time and yet allow for dynamic shape changes from one flight state to the next. More modern pneumatic actuators, including FAA certified autopilot servoactuators are frequently used by aircraft around the world. Pneumatic artificial muscles (PAM) show good promise as aircraft actuators, but follow the traditional model of load concentration and distribution commonly found in aircraft. A new system is proposed which leaves distributed loads distributed and manipulates structures through a distributed actuator. By using Pressure Adaptive Honeycomb (PAH), it is shown that large structural deformations in excess of 50% strains can be achieved while maintaining full structural integrity and enabling secondary flight control mechanisms like flaps. The successful implementation of pressure-adaptive honeycomb in the trailing edge of a wing section sparked the motivation for subsequent research into the optimal topology of the pressure adaptive honeycomb within the trailing edge of a morphing flap. As an input for the optimization two known shapes are required: a desired shape in cruise configuration and a desired shape in landing configuration. In addition, the boundary conditions and load cases (including aerodynamic loads and internal pressure loads) should be specified for each condition. Finally, a set of six design variables is specified relating to the honeycomb and upper skin topology of the morphing flap. A finite-element model of the pressure-adaptive honeycomb structure is developed specifically tailored to generate fast but reliable results for a given combination of external loading, input variables, and boundary conditions. Based on two bench tests it is shown that this model correlates well to experimental results. The optimization process finds the skin and honeycomb topology that minimizes the error between the acquired shape and the desired shape in each configuration.

Proceedings Article | 1 April 2010 Paper

Pressure adaptive honeycomb: a new adaptive structure for aerospace applications

Roelof Vos, Ron Barrett

Proceedings Volume 7647, 76472B (2010) https://doi.org/10.1117/12.847031

KEYWORDS: Actuators, Shape memory alloys, Aerospace engineering, Manufacturing, Finite element methods, Wind measurement, Skin, Aluminum, Dielectrics, Wind energy

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Proceedings Article | 7 April 2009 Paper

Advanced control techniques for post-buckled precompressed (PBP) flight control actuators

Mark Groen, Michiel Van Schravendijk, Ronald Barrett, Roelof Vos

Proceedings Volume 7288, 72881V (2009) https://doi.org/10.1117/12.816091

KEYWORDS: Actuators, Capacitance, Data acquisition, Control systems, Wheatstone bridges, Ferroelectric materials, Barium, Resistance, Transducers, Aluminum

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Proceedings Article | 31 March 2008 Paper

Design, development, and testing of a transonic missile fin employing PBP/DEAS actuators

Ron Barrett, Roelof Vos

Proceedings Volume 6930, 693011 (2008) https://doi.org/10.1117/12.774516

KEYWORDS: Actuators, Dubnium, Control systems, Missiles, Aerodynamics, Weapons, Aerospace engineering, Wind measurement, Diamond, Cobalt

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Proceedings Article | 27 April 2007 Paper

Post-buckled precompressed (PBP) subsonic micro flight control actuators and surfaces

Ron Barrett, Roelof Vos, Roeland De Breuker

Proceedings Volume 6525, 65250M (2007) https://doi.org/10.1117/12.711561

KEYWORDS: Actuators, Chemical elements, Dubnium, Wind measurement, Aerospace engineering, Cobalt, Kinematics, Micro unmanned aerial vehicles, Nomenclature, Adaptive control

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Proceedings Article | 5 April 2006 Paper

Post-buckled precompressed (PBP) piezoelectric actuators for UAV flight control

Roelof Vos, Ron Barrett, Lars Krakers, Michel van Tooren

Proceedings Volume 6173, 61730E (2006) https://doi.org/10.1117/12.658695

KEYWORDS: Actuators, Unmanned aerial vehicles, Skin, Latex, Wind measurement, Aerospace engineering, Control systems, Ferroelectric materials, Switching, Aluminum

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Proceedings Article | 5 May 2005 Paper

Post-buckled precompressed (PBP) elements: a new class of flight control actuators enhancing high-speed autonomous VTOL MAVs

Ronald Barrett, Ross McMurtry, Roelof Vos, Paolo Tiso, Roeland Breuker

Proceedings Volume 5762, (2005) https://doi.org/10.1117/12.599083

KEYWORDS: Actuators, Micro unmanned aerial vehicles, Dubnium, Unmanned aerial vehicles, Cobalt, Solid state physics, Aerospace engineering, Chemical elements, Wind measurement, Performance modeling

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Showing 5 of 7 publications

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