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Koppen, S. (author)High-tech equipment critically relies on the precise and reliable fine alignment of components such as mirrors and lenses for calibration and adaptation of instrumentation. To meet the ever-increasing requirements on precision, engineers typically resort to monolithic compliant mechanisms. These mechanisms gain mobility by deformation of the...doctoral thesis 2022
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Linssen, Jonathan (author)A broad range of bistable, multi-stable and neutrally stable compliant mechanisms have been developed over the years. These non-monostable systems show great potential for deployment in e.g. the medical, the manufacturing and the precision industry. Often the presence of prestress is a requirement for obtaining non-monostability within the realm...master thesis 2022
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Houweling, Stijn (author)This project presents a compliant slender mechanism with a low axial-bending stiffness ratio. This can be used in passive exoskeletons. Passive exoskeletons can assist people with their work by preventing injuries. Currently exoskeletons uses sliders to account for the extension of the spine when bending, but this could be uncomfortable. The...master thesis 2022
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Smit, Neil (author)Fin Ray Effect (FRE) grippers have proven versatile and effective in pick & place automation applications. However, spherical and lateral round objects are still a challenge for the state-of-the-art, as solutions are unstable when placing those objects off-centre from the longitudinal line. Resulting in large and heavy FRE gripper assemblies...master thesis 2022
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Sickler, Hanna (author)Prostate cancer is the most frequently diagnosed cancer type among men, and the third deathliest form of cancer. Several treatments are available to treat prostate cancer. Low Dose Rate Brachytherapy (LDR BT) is one of them, which inserts permanent radioactive seeds into the prostate using a needle. The literature review performed prior to this...master thesis 2022
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Rommers, J. (author)The moving parts in a mechanical device often rely on rolling or sliding contacts such as in ball bearings to gain motion. These suffice in many applications, but the friction inherent to their working principle limits their motion repeatability and thereby their precision. Flexure mechanisms are a popular alternative in the field of precision...doctoral thesis 2022
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Friederich, Bart (author)This research proposes and validates a novel grasping principle to be able to set caging grasps in cluttered environments. A prototype is designed making use of manoeuvering fingers which propagate along the object surface and are covered with everting belts to minimize slip and thus friction forces on the object and environment. Using several...master thesis 2022
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Nijssen, J.P.A. (author)Full film lubricated bearings are machine components that excel in their ability to carry high loads with very little friction. Their main archetypes, passive hydrodynamic and active hydrostatic bearings, are used in a wide variety of applications, ranging from hydraulic pumps to high precision machine benches. They are most commonly lubricated...doctoral thesis 2022
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Ahmad, Hanzalah (author)Active materials are a type of material that can respond to external stimuli and change their physical properties as a response. Neutrally stable compliant mechanisms are a class of compliant mechanisms that use the flexibility of their members to deform and maintain that deformed configuration without requiring external work. In order to make a...master thesis 2022
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Meij, Joep (author)Limited stroke automatic watch winding poses a challenge due to the proof mass range being smaller than the input displacements. Traditionally the proof mass is connected to the mainspring by a linear reduction transmission however this setup only functions effectively for specific accelerations. This paper proposes to use a nonlinear...master thesis 2022
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Kumar, Prabhat (author), Langelaar, Matthijs (author)This paper presents a robust density-based topology optimization approach for synthesizing pressure-actuated compliant mechanisms. To ensure functionality under manufacturing inaccuracies, the robust or three-field formulation is employed, involving dilated, intermediate and eroded realizations of the design. Darcy's law in conjunction with a...journal article 2022
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Hargrove, Brianne (author), Nastevska, Angela (author), Frecker, Mary (author), Jovanova, J. (author)Folding compliant mechanisms have the potential to be used for innovative designs tailored for specific applications such as energy absorption, shape morphing, or stress relief. This tailorability relies on multiple variables that define the geometric and material behavior. The combined effort of the geometric and material nonlinearity can...journal article 2022
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Koppen, S. (author), Langelaar, Matthijs (author), van Keulen, A. (author)High-tech equipment critically relies on flexures for precise manipulation and measurement. Through elastic deformation, flexures offer extreme position repeatability within a limited range of motion in their degrees of freedom, while constraining motion in the degrees of constraint. Topology optimization proves a prospective tool for the...journal article 2022
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Wu, D. (author), Ha, Xuan Thao (author), Zhang, Yao (author), Ourak, Mouloud (author), Borghesan, Gianni (author), Niu, Kenan (author), Trauzettel, F. (author), Dankelman, J. (author), Menciassi, Arianna (author), Poorten, Emmanuel Vander (author)In cardiovascular interventions, when steering catheters and especially robotic catheters, great care should be paid to prevent applying too large forces on the vessel walls as this could dislodge calcifications, induce scars or even cause perforation. To address this challenge, this paper presents a novel compliant motion control algorithm...journal article 2022
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Numic, A. (author), Blad, Thijs (author), van Keulen, A. (author)In this paper, a novel alternative method of stiffness compensation in buckled mechanisms is investigated. This method involves the use of critical load matching, i.e., matching the first two buckling loads of a mechanism. An analytical simply supported five-bar linkage model consisting of three rigid links, a prismatic slider joint, and four...journal article 2022
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Rommers, J. (author), Naves, M. (author), Brouwer, D. M. (author), Herder, J.L. (author)In this study, a flexure-based (compliant) linear guide with a motion range comparable to its footprint is presented. The design consists of two-folded leaf springs on which torsion reinforcement structures are added. Due to these structures, only two-folded leaf springs are needed instead of a minimum of five as in preexisting designs. The...journal article 2022
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THOMAS KADAVIL ABRAHAM, Thomas (author)The principles of compliant mechanisms have been available to engineering students, students of mechanical engineering. Designers or design students had very little understanding of the principles behind making compliant things(Appendix B- Interviews). <br/><br/>Through the course of this project, the relevance of compliant products to designers...master thesis 2021
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van Houten, Aris (author)Compliant mechanisms and decoupled parallel mechanisms are topics of high interest. The combination has been manifested for lower-mobility mechanisms, yet not attempted for higher degrees of freedom. The scarcity is countered by designing a decoupled compliant spherical parallel mechanism (DCSPM), having three independent rotational degrees of...master thesis 2021
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van der Lans, Daan (author)Elastically neutrally stable structures are compelling within the field of compliant mechanisms, since no force is required to deform them. Several examples of this state of elastic neutral stability exist, which often use equal but opposing structures to balance internal forces. This thesis is on the design of an active neutrally stable...master thesis 2021
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Nieuwland, Marsha (author)Vibration energy harvesters have been proposed as a solution to increase the lifetime of wireless and portable medical devices. One example of implantable medical devices for which energy harvesters could be interesting, are pacemakers. With a lifespan of about 6 to 12 years, the battery must be replaced after this period of time. Using an...master thesis 2021