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Huisjes, A.E. (author), van der Wijk, V. (author)This article presents the compliant manipulator design method (COMAD) for the synthesis of serial and parallel multi-DoF compliant mechanisms. Currently, the freedom and constraint topology (FACT)-method results in flexure systems being a serial kinematic solution for multi-DoF motions. In the COMAD method parallel solutions are included too...journal article 2023
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Alfeld, M.W.E.M. (author), Tempel, P. (author), van der Wijk, V. (author)The acquisition of elemental and chemical distribution images on the surface of cultural heritage objects has provided us new insights into our past. The techniques commonly employed, such as macroscopic X-ray fluorescence imaging (MA-XRF), in general require pointwise or whisk-broom scanning of an object under constant measurement geometry for...journal article 2023
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Suryavanshi, Kartik (author), Hamaza, S. (author), van der Wijk, V. (author), Herder, J.L. (author)In this paper, we present the ADAPT, a novel reconfigurable force-balanced parallel manipulator for spatial motions and interaction capabilities underneath a drone. The reconfigurable aspect allows different motion-based 3-DoF operation modes like translational, rotational, planar, and so on, without the need for disassembly. For the purpose of...conference paper 2023
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Stutzmann, S. (author), van der Wijk, V. (author)Otto Fischer was during the late 19th and early 20th century the founder of 3-D human gait analysis. From motion recordings he calculated by hand the inverse dynamics of humans in motion, for which he discovered and used the principal vectors of a system of moving bodies. With the principal vectors the equations of motion and the kinetic...conference paper 2023
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Koene, Robbert (author), Meijaard, J.P. (author), van de Ruit, M.L. (author), Mugge, W. (author), van der Wijk, V. (author)Humans vary the stiffness in their joints depending on tasks and circumstances. For posture control a high joint stiffness is required to withstand perturbations, whereas for force control a low joint stiffness is required. To investigate how humans vary their joint stiffness precisely for moving an arm, a wearable device is needed that can...conference paper 2023
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Haasnoot, Jelle (author), Happee, R. (author), van der Wijk, V. (author), Schwab, A.L. (author)Bicycle simulators have been the subject of considerable research, however, few of these attempts have integrated direct balance control and realistic freedom of motion to deliver a real-world dynamic cycling experience. This study presents the BIKE (Bicycle Intrinsic Kinematics Emulator) system, a kinematic bicycle simulator, developed with...journal article 2023
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Meijaard, J.P. (author), van der Wijk, V. (author)The dynamic balancing of flexible mechanisms, that is, the reduction or elimination of shaking forces and shaking moments on the support structure, is considered. Two approaches are pursued: one uses similarity and the other modal balancing. A single rotating link can be balanced by a properly scaled countermass, for which balancing criteria...journal article 2022
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Zomerdijk, M.J.J. (author), van der Wijk, V. (author)Industrial robotic manipulators in pick-and-place applications require short settling times to achieve high productivity. The fluctuating reaction forces and moments on the base of a dynamically unbalanced manipulator, however, cause base vibrations, leading to increased settling times. These base vibrations can be eliminated with dynamic...journal article 2022
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Borcea, Ciprian S. (author), Broeren, F.G.J. (author), Herder, J.L. (author), Streinu, Ileana (author), van der Wijk, V. (author)Auxetic behavior refers to lateral widening upon stretching or, in reverse, lateral shrinking upon compression. When an initially auxetic structure is actuated by compression or extension, it will not necessarily remain auxetic for larger deformations. In this paper, we investigate the auxetic range in the deformation of a periodic framework...journal article 2021
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Rommers, J. (author), van der Wijk, V. (author), Herder, J.L. (author)In this paper we present two new designs of spherical flexure joints, which are the compliant equivalent of a traditional ball-and-socket joint. The designs are formed by tetrahedron-shaped elements, each composed of three blade flexures with a trapezoidal shape, that are connected in series without intermediate bodies. This is new with...journal article 2021
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van der Wijk, V. (author)In this paper it is shown how a 2-DoF inherently force balanced spatial deployable Butterfly Linkage is found consisting of four entangled similar Bennett linkages moving synchronously and with the common center of mass in the central joint. This linkage is derived from the Grand 4R Four-Bar Based Inherently Balanced Linkage Architecture by...book chapter 2021
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van der Wijk, V. (author)Considering balancing as starting point in the design of mechanisms and manipulators is known as inherent balancing. Inherently balanced linkage architectures then form the basis from which balanced mechanism solutions are synthesized, needing no countermasses contrary to balancing of given mechanisms. In this paper a new and advanced...journal article 2020
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Meijaard, J.P. (author), van der Wijk, V. (author)The use of principal points and principal vectors in the formulation of the equations of motion of a general 4R planar four-bar linkage is shown with two kinds of methods, one that opens kinematic loops and one that does not. The opened kinematic loop approach analyses the moving links as a system with a tree connectivity, introducing...journal article 2020
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Broeren, F.G.J. (author), van der Wijk, V. (author), Herder, J.L. (author)In this paper, a pseudo-rigid body model is proposed for the analysis of a spatial mechanical metamaterial and its application is demonstrated. Using this model, the post-buckling behavior of the mechanical metamaterial can be determined without the need to consider the whole elastic structure, e.g., using finite-element procedures. This is done...journal article 2020
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van der Wijk, V. (author)This article presents a graphical analysis method for the verification of the gravity force balance and shaking force and shaking moment balance of a 1-DoF pantographic linkage. First the joint velocities of the linkage are graphically found of which the procedure is well known. To obtain the linear and angular momentum graphically, the mass...conference paper 2020
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Tempel, P. (author), Alfeld, M.W.E.M. (author), van der Wijk, V. (author)Cultural heritage science envisages understanding of methods and techniques used by past painters and sculptors in creating their masterpieces of art. Existing devices for in situ and non-destructive, automated scanning are large and bulky and built around the assumption of a perfectly planar surface. We are developing a lightweight, portable...book chapter 2020
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Broeren, F.G.J. (author), van de Sande, W.W.P.J. (author), van der Wijk, V. (author), Herder, J.L. (author)Dilational structures can change in size without changing their shape. Current dilational designs are only suitable for specific shapes or curvatures and often require parts of the structure to move perpendicular to the dilational surface, thereby occupying part of the enclosed volume. Here, we present a general method for creating dilational...journal article 2019
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van der Wijk, V. (author), Herder, J.L. (author)A reconfigurable mechanism can be defined as a mechanism with changing<br/>mobility due to its specific mechanical design, for example changing from a<br/>configuration with one degree of freedom to a configuration with two degrees<br/>of freedom motion. Due to the practical and theoretical challenges of developing<br/>a reconfigurable mechanism...journal article 2018
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Broeren, F.G.J. (author), van de Sande, W.W.P.J. (author), van der Wijk, V. (author), Herder, J.L. (author)Dilational structures are one degree of freedom structures able to change their size without changing their global shape. In this paper, we present a method to create dilational shells with arbitrary curvature. For this, we designed triangular tiles, which can be placed on a triangulation of the desired surface. We present the method and...conference paper 2018
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Herder, J.L. (author), Van der Wijk, V. (author)The invention relates to a delta robot comprising a stationary base (2) and a movable platform (3) that is connected to the base with three chains of links (4,5,6), and comprising a balancing system incorporating at least one pantograph (7) for balancing the robot's center of mass, wherein the at least one pantograph has a first free extremity ...patent 2010