Searched for: subject%3A%22Mechanical%22
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ABOUHEIDARI, SINA (author)
Compliant mechanisms, particularly helicoidal shell joints, present intriguing possibilities in mechanical design with applications in medical devices, robotics, automotive, and aerospace engineering. This research focuses on the synthesis of nonlinear torque-angle profiles using a compliant helicoidal shell mechanism such as gravity-balancing...
master thesis 2024
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Kerkhove, Casper (author)
The recent success of - and demand for - compliant mechanisms has increased rapidly within the micro-electromechanical systems-, aircraft-, spacecraft-, surgical-, and precision-instrument industries. Yet, even greater success may be achieved by overcoming the computational cost and instability of the mechanisms' design methodology. This...
master thesis 2023
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Koentges, Saralina (author)
This work aims to achieve a softening moment-angle response by utilizing compliant parts. The approach uses the principle of contact release, which involves initially prestressed torsional bars arranged in series, separated by rigid bodies. By stepwise activation of the torsional bars, a softening behavior is achieved. Mechanical stops are...
master thesis 2023
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van den Oever, Sam (author)
A growing energy demand has sparked interest into harvesting energy from the human body. Often, a rotational proof mass is used to harness energy for a wearable from kinetic motion of its user. The addition of a spring has the potential to significantly increase efficiency for these low-power rotational energy harvesters. In this research a...
master thesis 2023
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Kouwenhoven, Timo (author)
A novel nonlinear stiffness unit cell aided magnetic gravity compensator is proposed for the purpose of isolating low-frequency vibrations. A negative stiffness magnet setup is combined with a compliant unit cell with tailored nonlinear force-displacement characteristics. This combination offers a large range of motion featuring low stiffness, a...
master 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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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
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Daan, Boris (author)
For steel flexures, complex geometries are required to reach high support stiffness and limit axis drift over large ranges of motion. These complex flexures are expensive and difficult to manufacture. This paper presents a method of designing short, polymer wire flexures with high support stiffness and modelling their axis drift using a novel...
master thesis 2020
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Chatzimanolis, Manolis (author)
The advent of miniaturized satellites has sparked an interest in effective methods of exploiting their capabilities. Potential has been found in propulsion­enabled units, and TU Delft is at the forefront of researching and developing suitable propulsion modules for thrust generation or attitude control of small satellites classified as Cubesats...
master thesis 2020
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Juwita, Adinda Bunga (author)
Multi-material compliant mechanisms have shown the potential to be utilized in the upper-limb prosthesis. The mechanisms consist of flexural and rigid parts, where the flexural components can serve as flexible joints between rigid bodies in the device (e.g., finger and finger segments). This configuration is feasible to be fabricated using a...
master thesis 2019
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Janssen, Janeau (author)
In-situ sample holders with double-tilting capabilities are used to insert and position samples inside a transmission electron microscope for dynamic imaging. However, the performance of these sample holders, regarding energy-dispersive X-ray spectroscopy (EDS) analysis, is not on par with their single-tilt counterparts. By analyzing the EDS...
master thesis 2018
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van Dijk, Nick (author)
The human machine-interface is more important than ever in the field of exoskeletons. Current design approaches lack a way of systematically designing the ergonomics of exoskeletons. Methods with a more pro active approach to ergonomics have to be developed. This thesis extends existing methods by which self aligning mechanisms are created with...
master thesis 2018
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van der Deijl, Henri (author)
An Oldham coupling is a constant velocity rotational transmission between two misaligned but parallel axis. Conventionally, this coupling uses two sliding contact prismatic joints, in which friction, wear, backlash and lubrication is unavoidable. Conversion to a compliant mechanism, in which motion is accomplished by elastic deformation instead,...
master thesis 2018
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Frouws, Jan (author)
This work introduces a new method to deal with design dependent pressure loads in Topology Optimisation (TO) using the SIMP material model. A pronounced focus is on optimising pressure actuated compliant mechanisms. The difficulty herein is the interpretation of the pressure boundary in a TO design. In TO the boundaries are blurry, because of...
master thesis 2017
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Barel, Marije (author)
At this moment there are more than 150 different designs of CMMA in existence. To aid the designer to develop a new or improved CMMA or choose what the design to use, a classification system is developed during the literature research. It is based on the geometrical advantage (GA) of the CMMA, and on the input and output port motion paths. Their...
master thesis 2017
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Jia, Boran (author)
The theories of energy harvester and complaint mechanism on micro scale have been developed vastly, however prototyping and realization of conceptual designs of such devices is difficult. Currently, micro scale prototyping devices can only be manufactured by means of lithography. However, lithography is expensive, both in terms of time and cost....
master thesis 2017
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Geerts, Jelmer (author)
Patients with degenerative neuromuscular diseases experience decreasing muscle function, starting from a very young age. While a wheelchair can partially replace the lost use of the legs, many activities needed in daily life require the use of the arms. For these activities patients rely on the help of caregivers. Several devices designed to...
master thesis 2017
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van Manen, Rijk (author)
Compliant mechanisms accomplish their function due to the elastic deformation of their elements rather than using the relative motion of rigid bodies. Thereby the drawbacks of sliding friction, including wear and hysteresis are eliminated. Besides that compliant mechanisms allows monolithic production which facilitates cost reduction and...
master thesis 2017
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Houwers, H.W.R. (author)
Background: Compliant mechanisms have the advantage of low weight, no lubrication, no wear and no friction. These are good properties for a mechanical transmission. But large range of motion (ROM) in compliant mechanisms is a challenge. If the ends of a long shell with only a transverse curvature are connected, a two-fold closed-loop tape spring...
master thesis 2016
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