Searched for: department%3A%22Precision%255C+and%255C+Microsystems%255C+Engineering%22
(61 - 80 of 251)
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Te Wierik, M.H.J. (author)The first part of this thesis elaborates on two numerical models of different levels of comprehensiveness of a Laval rotor on plain journal bearings. These models are compared to an experiment, capable of rotating at 60 krpm, also devised in this research. Reasonable correlation in terms of whirl and whip behavior has been found. In the second...master thesis 2016
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Klein Horsman, F. (author)Vibrations can be a limiting factor in systems working with nanometer precision. Inertial sensors are used to measure these vibrations. This thesis presents a hybrid inertial sensor using both a displacement and velocity measurement on a single mass-spring system. The measurements are combined into one output of absolute displacement. A...master thesis 2016
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Hekner, S.M. (author)ASML's wafer scanners are crucial machines in the production of integrated circuits (ICs). An important performance parameter in these photo-lithographic machines is the so-called stacking precision, which is a measure for the accurate stacking of multiple layers during the photo-lithography process in the xy-plane. The stacking precision is,...master thesis 2016
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Van Omme, J.T. (author)Strain engineering of graphene has been predicted to change its chemical reactivity, thereby forming the basis for new applications, like hydrogen storage. Extreme strains of more than 10% are required for these applica- tions. However, experimental verification of theoretical predictions is still greatly lacking. Such high strains could simply...master thesis 2016
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De Laat, M.L.C. (author)The choice on which cantilever to use for Atomic Force Microscopy (AFM) depends on the type of the experiment being done. Usually, the cantilevers have to be exchanged when a different stiffness is required and the entire alignment has to be repeated. In the present work, we have developed a method to adjust the stiffness of the AFM cantilever...master thesis 2016
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Driessen, A.M. (author)This research aims at improving the synergy between 3D printing and topology optimisation. 3D printing, more formally known as additive manufacturing, forms an object by constructing successive layers on top of each other. This procedure of manufacturing offers new possibilities due to the improved design freedom. Topology optimisation is a...master thesis 2016
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- Wessels, J. (author) master thesis 2016
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Kramer, L. (author)Several eye diseases appear in the posterior part of the eye, i.e. the retina or fundus. Retinal images therefore provide valuable information to identify eye diseases. Optical Coherence Tomography (OCT) is a 3D imaging technique that can image the retina with a resolution and depth penetration that can not be achieved by any other non-invasive...master thesis 2016
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Roethof, D.N. (author)Active camber control is a novel suspension control method which can improve the lateral forces on the tires of a vehicle. The mechanism actively tilts the tires into the corner like a motorcycle would lean into the corner. This is not only desired in the race car industry where everything is focused on driving performance, but also in daily...master thesis 2016
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Van der Linde, T.M. (author)Topology optimization is increasingly used as a design tool in engineering. Within structural mechanics, most applications focus on statics. An extension to time-domain (transient) dynamics will have many useful applications, but this is currently hindered by high computational costs. The goal of this research is to reduce these costs by...master thesis 2016
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Lampaert, S.G.E. (author)A ferrofluid is a fluid with paramagnetic properties while having a colloidal stability. This can be used to obtain a hydrostatic type of bearing that distinguishes itself from other bearings by its compactness, inherent stability, low (viscous) friction, absence of pumps and absence of stick-slip. These properties, together with its low price,...master thesis 2015
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Theulings, E.C.A.S. (author)Deformable mirrors are widely used in adaptive optics to correct wavefront aberrations. Actuators are used to deform the mirror into the shape that is needed for this correction. The most common type of actuation is with out-of-plane actuators that are placed on the backside of the mirror surface. Actuation with in-plane actuators placed on the...master thesis 2015
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Xu, T. (author)Discharge capacity is an important factor that determines the performance of lithium ion battery. The internal resistance of the electrodes influence the discharge capacity. As the electrode geometry influences its resistance, topology optimization can be applied to determine the electrode shape such that it has a minimal internal resistance and...master thesis 2015
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Van Der Wurff, S. (author)This work focuses on a multidisciplinary design optimization of an aircraft wing. Among others, a structural optimization of the wing stiffness is performed. For a certain stiffness model, a set of relevant load cases can be determined that have high chance to cause active constraints. The purpose of this research is to investigate if the set of...master thesis 2015
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Teunisse, N.K. (author)Micro air vehicles (MAVs) are small aircraft that are promising for search and rescue missions or remote observations of hazardous or inaccessible areas. Currently one of the problems MAVs face is the limited action radius. To increase the action radius, a more energy efficient MAV is needed. This can be achieved by exploiting the resonance of...master thesis 2015
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Zaanen, N.J. (author)During the last ten years, open heart surgery has increasingly been replaced by minimally invasive surgery (MIS), which has three main advantages. There is reduced blood loss, small scars to reduce infections, and a shorter recovery time. However, MIS still lacks full surgical capabilities such as tool dexterity, tool-tissue contact force...master thesis 2015
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- Van Beek, M.A. (author) master thesis 2015
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Van Bracht, S. (author)Micro-electromechanical systems (MEMS) often require tuning to correct for fabrication errors such as changed dimensions or to adapt for a different scenario such as changed temperature. To prevent continuous power consumption for maintaining system behavior, a locking system can be added which does not require any power during operation. A new...master thesis 2015
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Wang, Y.W. (author)An Integrated 6-DoF Lorentz Actuator with Gravity Compensator for Vibration / Precision Positioning has been analyzed and optimized. The gravity compensation function is realized by permanent magnets. The 6-DoF actuator is based on the utilization of the mover magnets. A demonstrator of the novel 6-DoF actuator integrated with magnetic gravity...master thesis 2015
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Habib, S.H. (author)This thesis presents the design and implementation of a precision stage equipped with novel sensing and actuation concepts. The stage is considered among the first stages capable of providing a full rotation as well as planar translations with only one moving part and one sensor, namely a Position Sensitive Detector. This affordable sensor...master thesis 2015
Searched for: department%3A%22Precision%255C+and%255C+Microsystems%255C+Engineering%22
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