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The transmission of pump induced pressure disturbances to nano-precision instrumentation

Koens, Dennis (author)

High-tech systems are subjected to strict temperature requirements. Therefore temperature control using cooling water is vital for thermal stability. Unfortunately, components like pumps and fluid couplings generate flow disturbances, resulting in mechanical vibrations that influence the performance of the system. This research focusses on the...

master thesis 2023

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Underactuated Compliant Resonant Walking Robot with Steering Mechanism

Lemmens, Cas (author)

<br/>This thesis report presents research on small walking robots. The report begins with an introduction that explains the project’s origin, outlines the project’s goal, and provides an overview of the report’s contents. Following the introduction, a literature study is conducted to investigate the current state-of- the-art steering mechanisms...

master thesis 2023

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The Influence of Porosity on the Dynamic Characteristics of Porous Air Bearings

Burghoorn, Rick (author)

Air bearings are a vital component to high tech machines and have been in widespread use since the 1960s. They provide near frictionless motion, have high stiffness and a near infinite lifetime. When looking at existing literature the influence of the porosity on the dynamic characteristics has not been researched in depth. Especially when...

master thesis 2023

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Enhancing the Q Factor of Diamagnetically Levitating Resonators by Segmentation

Weisz, Eli (author)

Diamagnetic levitation presents a promising platform for realizing resonant sensors and energy harvesters. The technique offers mechanical isolation from the environment while operating with zero power consumption. This unique feature ensures exceptional sensitivity and accuracy in numerous applications. However, the presence of eddy currents in...

master thesis 2023

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Automated Reset Controller Design with a Novel Structure for Improved Performance of an Industrial Motion Stage

Liu, Yixuan (author)

Linear time-invariant (LTI) controllers suffer from inherent limitations as the waterbed effect and Bode's gain-phase relationship. Reset control, a nonlinear strategy involving the reset of linear controllers, offers a potential solution to overcome these traditional LTI limitations. Based on the describing function analysis, the reset...

master thesis 2023

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Constant Torque Mechanism for Gravity Balancing in Wrist Support Application

Chitluri, Dhanush (author)

Individuals suffering from neuromuscular conditions, such as Duchenne muscular dystrophy (DMD), experience a progressive weakening of muscles. During the progression, the affected patients require supporting devices like orthoses or exoskeletons to perform their daily activities. Although immense efforts are put into the development of...

master thesis 2023

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POI Position and Force Control in Industrial Wire Bonders

Puthukattil, Rahul (author)

This thesis investigates the application of force control techniques to enhance industrial wire bonding processes. It entails the design of a simulation model for the Z-axis interaction between bondhead and environment, followed by the implementation of a Parallel Force Control architecture in Simulink. The study evaluates different force and...

master thesis 2023

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space application for contactless actuator

CHUNG, CHIA-YI (author)

The utilization of CubeSats as a cost-effective solution for satellite missions allows universities to engage in outer space research. Notably, the issue of increased tumbling rates during deployment is highlighted, attributed mainly to propulsion and guiding functions performed by existing contact actuators.<br/>The proposed solution in this...

master thesis 2023

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Design of an origami-inspired leaf flexure as an alternative to classical 2D flexures

van den Berg, Yannick (author)

Compliant mechanisms are often used in precision mechanism design as a suspension for translational stages. Their light weight makes them efficient and they do not suffer from friction or backlash. They transmit and transform a finite motion along their degrees of freedom via elastic deformation and provide high stiffness along their degrees of...

master thesis 2023

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All-Wheel Torque Vectoring for Driver-in-the-Loop Drifting

Koshy Cherian, Jeswin (author)

Drifting, a specialized form of sideslip control, involves intentionally inducing and maintaining a state of oversteer for lateral sliding of the vehicle. While previous research has primarily focused on autonomous drift control, the integration of the driver in the control loop remains largely unexplored. This thesis aims to explore how a...

master thesis 2023

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Design of a silicon photonic microphone

Scheepstra, Jasper (author)

In a world increasingly dominated by technological advancements, the demand for high-quality microphones has never been more present. Seamless speech recognition and the development of userfriendly hearing aids remain significant challenges. State-of-the-art micro-electromechanical system (MEMS) microphones are reaching their bottlenecks in...

master thesis 2023

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Overactuation for Active Damping in Compliant Positioning Stage using Piezoelectric Transducers

Natu, Aditya (author)

Integrating compliant mechanisms into high-precision motion systems has facilitated the development of lightweight and frictionless designs. However, these systems often face challenges related to low-frequency parasitic resonance modes and limited structural damping, leading to compromised position accuracy and restricted control bandwidth....

master thesis 2023

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Data-based modal space control for active damping

Fan, Shiyu (author)

This research presents a novel data-based modal control method for actively dampening the flexible mode in a multi-input multi-output (MIMO) system. Traditional passive damping methods add significant mass to the system, making recent advances in sensor and actuator technology, such as lightweight piezoelectric materials, a more appealing...

master thesis 2023

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Design of a Hybrid Tunable Magnet Actuator with increased dynamic capabilities

Swank, Tim (author)

To increase the accuracy of high-precision motion systems, the heat dissipation in electromagnetic actuators must be reduced to limit thermal expansion. Variable Reluctance Actuators have a high-frequency bandwidth but suffer from heating when providing high forces for sustained periods of time. Tunable Magnet Actuators can provide a large force...

master thesis 2023

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Optimal Active Damping Performance in Presence of Disturbance and Electronic Noise Sources

Verhoog, Castor (author)

Vibration attenuation in lightly damped blade-like systems such as cantilevers or end-effectors of robot manipulators can be dampened using Active Vibration Control (AVC). Piezoelectric patches in a collocated setup measure and control the bending modes of such a cantilever system using Positive Position Feedback (PPF). Tuning methods for PPF...

master thesis 2023

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Metastructures in a sensor-actuator configuration: the practical issues in bandgap generation

Coatto, Francesco (author)

Undesired vibrations are one of the most significant sources of error in any type of mechatronic system or component. The emerging field of elastic (locally resonant) metamaterials offers a viable solution to successfully suppress these by generating bandgaps in both resonant and non-resonant regions. In this thesis, metamaterials in a sensor...

master thesis 2023

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Multilayer thin film thickness measurement method: to measure thickness of liquid thin film within a layer stack

Bleeker, Julian (author)

The research objective of this research is to develop a measurement method that can measure thin film thicknesses through a multilayer that consists of both surrounding thick layers and in between thin films. An optical non-contact measurement method is researched and developed to non-destructively measure the thickness of a liquid thin film,...

master thesis 2023

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Aerosol Direct Write characteristics and deposition methodology for functional SERS substrates

van Zee, Tim (author)

Surface-enhanced Raman spectroscopy (SERS) is a powerful non-destructive molecule identification technique. The technique is made viable by the enhancement of the Raman effect which is caused by metallic nanoparticle (MNP) structures. A fabrication method that can manufacture highly consistent SERS substrates is important. Aerosol Direct Write ...

master thesis 2023

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A single input contact-based compliant switching mechanism

de Jong, Martin (author)

In the field of mechanical metamaterials, unconventional physical properties are realized by changing the geometric structure of a unit cell. A metamaterial is composed of numerous unit cells. Researchers have taken it a step further by making a reprogrammable unit cell. A reprogrammable metamaterial has additional elements or mechanisms in the...

master thesis 2023

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Towards Multi Shape Morphing Structures

Pels, Jasper (author)

The bending stiffness of a structure is highly dependent on its shape, and this relation can be utilized to allow for a structure to morph into different shapes during deformation. This paper focuses on shape-morphing into multiple shapes (Multi Shape-Morphing), and presents a design method for a parametric<br/>structure consisting of beams,...

master thesis 2023