Searched for: contributor:"van Ostayen, Ron (mentor)"
(1 - 16 of 16)
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van den Toorn, Stefan (author)
Stick-slip friction is the resulting effect of the transition between the dynamic and static friction coefficient. This effect determines the minimal sustained speed and minimal incremental motion of a movement system, limiting the performance in precise positioning systems. Available bearing types without stick-slip suffer from complexity, high...
master thesis 2020
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van der Wal, Karoen (author)
Ferrofluid rotary seals are mechanical contact-free magnetic liquid seals that are characterised by their simple structure, low friction and ability to hermetically seal. Although ferrofluid rotary seals for sealing vacuum and gases are part of a well established industry, the sealing of liquids has not been implemented yet. Literature learns...
master thesis 2019
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van Willigen, Jan (author)
Hydrostatic bearings are well known for having low friction and low wear in combination with high loading capacity.Traditionally, the running surfaces for a hydrostatic bearing are plane, rigid and smooth, ensuring a parallel lubricating film in the full range of movement. In this paper, we consider a new type of compliant, hydrostatic bearing...
master thesis 2019
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de Boom, Jeroen (author)
Air bearings are known for their low friction losses, constant viscosity and cleanliness, making them favourable in numerous high-tech applications. The relatively low aerostatic bearing stiffness is the major topic in state-of-the-art research and some recently proposed concepts are able to create infinite stiffness. This results in a strong...
master thesis 2019
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Bekker, Johan (author)
The modeling method for the performance of positive displacement pumps of hydraulic pumps is based on collecting operational data of the pump for its operational envelope and using equations with empirical fitting parameters and fit these equations to the data. This way values for the fitting parameters are obtained, with which the equations can...
master thesis 2019
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Hoogerbrugge, Ary-Jan (author)
In modern ASML machines optical components play an important role in the lithography process. EUV light is transported from the source to wafer by reflective optics. These mirrors are subjected to large thermal loading, as a large portion of the reflected light is absorbed in the mirror structure. The portion of the absorbed light is strongly...
master thesis 2019
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Salters, Ruben (author)
In the industry motion systems with electric motors are used for transporting and positioning thin flexible substrates at high throughput rates. A possible alternative actuation solution could be to apply contactless air film actuators which make use of air bearing principles. The air film actuators use a thin film of air to levitate and propel...
master thesis 2019
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Tedjawirja, Vincent (author)
The main goal of this master thesis is to develop a new low-cost radial air bearing system for the CT-scanner, which is currently expensive due to the strict tolerances on the large sized porous aerostatic radial air bearings as well as on the counter surface. This thesis has generated several potential low-cost air bearing system concepts. The...
master thesis 2018
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Jansen, Roy (author)
In the electronics industry there is a trend towards the handling of larger and thinner sheets of silicon, for the production of wafers and solar cells. The flowerbed is a contact-less handler for these fragile substrates based on air bearing technology. By levitating the substrate on a film of pressurized air, mechanical contact is avoided and...
master thesis 2018
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Brilstra, Stefan (author)
In the high-tech semiconductor industry floating air conveyors are used to transport and position silicon substrates. An interesting point for improvement is to limit the loss of pressurized air as conveyors are only effective at the position of the substrate.<br/>The goal of this research is to develop a local pneumatic valve, that is...
master thesis 2017
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Potma, Olivier (author)
Seals are used throughout the technology spectrum to prevent products form leaving their container or preventing foreign products to enter. With the sealing of rotary parts like shafts the seal needs to not only provide sealing capabilities, but also simultaneously allow for the desired movement without too much friction or wear. This is often...
master thesis 2017
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Snieder, Jelle (author)
In many industries, for example the semi-conductor and solar cell industry, production processes have to handle thin substrates such as wafers or solar cells. For economic reasons, the thickness of these substrates shows a decreasing trend over the years. This results in an increasing breakage rate of the substrates during the production process...
master thesis 2017
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Voorrips, Yvonne (author)
In the PHD researches of Jasper Wesselingh and Phuc Vuong, an active air film positioning system for thin substrates was developed. To apply this concept in an industrial environment, this research has to be extended to include both a positioning and a transportation system. An important part for up scaling the system is having an accurate...
master thesis 2017
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Verbruggen, Niek (author)
A new concept in the field of air-based contactless positioning has been explored. The concept is based on the variation of the outlet restriction of an actuator, which controls a net air flow starting from the inlet. The object to be positioned ‘floats’ on a thin air film with a thickness in the order of tens of micrometres. Since the film...
master thesis 2017
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Verboom, Jeroen (author)
The Netherlands Aerospace Centre is increasingly improving Selective Laser Melting (SLM) capabilities. It is working with academics and industry on demonstrators to prove the current state of the art of SLM. Recently<br/>they started with additive manufacturing (AM) of internal manifolds. This thesis aims to provide a novel design approach by...
master thesis 2017
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Klop, Wouter (author)
A humanoid robot is being developed, intended to operate robustly in a typical day-to-day human environment. Its ability to react quickly to stochastic disturbances, especially its ability to avoid falling, termed stability in this context, is of prime importance. The choosing of a suitable actuator that affords such stability is seen as a...
master thesis 2017
Searched for: contributor:"van Ostayen, Ron (mentor)"
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