An improved, coupled frequency domain model for floating offshore wind turbines including aerodynamics, hydrodynamics and control

Modelling of Floating Offshore Wind Turbines (FOWTs) is challenging due to the strong coupling between the aerodynamics of the turbine and the hydrodynamics of the floating structure, which makes the dynamic response of the whole system highly complex. A variety of numerical approaches can be used to predict this response.<br/><br/>The frequency...

A Price-Dynamic Model of Flexibility in the Electricity Market of the Future

To match supply from intermittent renewable energy sources (RES) with demand, it is proposed in literature to introduce flexibility in the electricity market of the future. Flexibility can be provided by energy storage, demand response and cross-border transmission. In this thesis flexibility is modeled explicitly through the price mechanism of...

Analyzing the wake of a wind turbine actuated with Dynamic Induction Control

To meet current renewable energy demands, there is a major increase in global wind power capacity. Wind turbines are commonly clustered in wind farms. When operating, wind turbines extract energy from the wind, creating a region characterized by a low velocity, called the wake. The wake negatively impacts the power production of downstream wind...

Feed forward control of U anti-roll tanks: Research on the effect of using a wave prediction system for the control of an active U anti-roll tank on the workability of an SOV operating at zero speed

Within this thesis an attempt is made to improve the seakeeping of a Service Operation Vessel (SOV) by means of an active anti-roll tank (ART). It is researched if the addition of a wave prediction system can improve the ART’s performance. As the seakeeping of the SOV is most important for the installed motion compensated gangway, the...

Non-Linear Bayesian System Identification of Cortical Responses Using Volterra Series

The human sensorimotor system can be seen as a complex network in which the brain plays an important role, resulting in a difficult-to-understand relation between proprioceptive stimuli and cortical responses. However, understanding this relationship is of added value for understanding various diseases which cause dysfunctionality. In recent...

A New Quantitative Analysis for Prostheses Research and Evaluation: A Sensor Fusion Approach

Problem: Due to high rejection rates regarding prostheses’ use, the assessment of the amputee’s use of the prosthesis has become more critical. Today’s prosthesis research is limited to assessing a users’ performance to perform tasks in a controlled environment. Therefore, these studies cannot wholly assess how the prosthesis is used in the...

Nonnegative Robust PCA for Background and Foreground Image Decomposition

Nowadays, video surveillance and motion detection system are widely used in various environments. With the relatively low-price cameras and highly automated monitoring system, video and image analysis on road, highway and skies becomes realistic. The key process in the analysis is to separate the useful information such as moving foreground...

Streaming Video Completion using a Tensor-Networked Kalman Filter

In streaming video completion one aims to fill in missing pixels in streaming video data. This is a problem that naturally arises in the context of surveillance videos. Since these are streaming videos, they must be completed online and in real-time. This makes the streaming video completion problem significantly more difficult than the related...

Anomaly Detection in Intersection Control: Sliding Mode Observer Based Anomaly Detection in Virtual Platooning Enabled Intersection Control

Road intersections have a large impact on road accidents and travel delay. Applying infrastructure, such as stop signs and traffic lights, are supposed to prevent collisions on the intersection. However, such methods contribute to the travel delay, while accidents still occur due to human errors. Considering the rise of automation within...

Air-based Contactless Wafer Precision Positioning System: Contactless Sensing Using Charge Coupled Devices

This thesis presents the development of a contactless sensing system and the dynamic evaluation of an air-bearing based precision wafer positioning system. The contactless positioning stage is a response to the trend seen in the high-tech industry, with the substrates becoming thinner and larger to reduce the cost and increase the yield. With...

The effect of kite control unit mass and drag on the flight behavior of an airborne wind energy system kite

Airborne wind energy (AWE) is an emerging field that aims to revolutionize the wind energy sector.This work focuses on the aspects of modeling AWE kite flight behavior. Research on such modelsis important since new or improved models can potentially reduce development time and costs andprovide insight in the role of key system parameters.This...

Modeling and Control of an Offshore Wind Turbine with Hydraulic Drivetrain and Regenerative Power System

Climate change is an inevitable fact and governments worldwide have started to recognize this by expanding the contribution of renewable energy sources to our global energy production. Wind energy is currently one of the most attractive solutions for the transition to a more sustainable energy future. Since wind energy is not the only competitor...

Control system for 3D crane tip compensation

Offshore wind farms are a sustainable source of energy, but these farms require maintenance which is very expensive using the current techniques. Huisman Equipment B.V. proposed a new type of offshore motion compensated crane that is capable of reaching the height of the nacelle of these wind turbines. The crane has a compensation system on the...

String-stable automated steering in cooperative driving applications

The ever-increasing road transport demand in the developing and the developed world has resulted in road-traffic networks nearing maximum capacity. Traditional approaches to this problem, such as increasing road capacity, do not offer long-term solutions. Combined with rising environmental concerns, the demand for smarter solutions has never...

Development of CRONE reset control

In high-tech industry (sub)nanometre precision motion control is essential. For example wafer scanners, used for production of integrated circuits, have to provide (sub)nanometre precision positioning whilst satisfying challenging requirements on speed at the same time. It is in demanding cases like this that different requirements begin to...

A study on moving mass roll control for ships

Due to a low restoring force as well as lack of damping, the roll motion of a<br/>vessel is usually the motion with the highest amplitude of all degrees of<br/>freedom. Therefore, in history many have tried to stabilize rolling ship<br/>starting with Watts in 1883. He described the damping of the roll motion by<br/>having a group of men running...