Enhancing early-stage energy consumption predictions using dynamic operational voyage data: A grey-box modelling investigation

The adverse human contribution to global climate change has forced the yachting industry to acknowledge the need to reduce its environmental impact due to the client's increasing pressure and potential future regulations to limit the ecological effects. Unfortunately, current real-world data presents a significant disparity between predicted...

Early Stage Fouling Effects Prediction for Yacht Design: A grey-box model approach using operational voyage data

In this thesis a grey-box model is developed to predict the power increase over time due to marine biofouling. Biofouling is known as the undesired adverse effect of living organisms growing on submerged surfaces. Fouling creates roughness on the hull and propeller and thus additional frictional resistance and loss of propeller efficiency, also...

Gaussian Process based Feedforward Control for Nonlinear Systems with Flexible Tasks: With Application to a Printer with Friction

Feedforward control is essential to achieving good tracking performance in positioning systems. The aim of this paper is to develop an identification strategy for inverse models of systems with nonlinear dynamics of unknown structure using input-output data, which can be used to generate feedforward signals for a-priori unknown tasks. To this...

Enhancing early-stage energy consumption predictions using dynamic operational voyage data: a grey-box modelling investigation

The adverse human contribution to global climate change has forced the yachting industry to acknowledge the need to reduce its environmental impact due to the client's increasing pressure and potential future regulations to limit the ecological effects. Unfortunately, current real-world data presents a significant disparity between predicted and...

An Engineering Grey-Box Approach to Macroeconomic Scenario Modelling: Time- and Frequency Domain Analysis of Macroeconomic Systems

This thesis is a first effort to develop a grey-box model of a macroeconomic system. This is in contrast to current black-box modelling approaches. These black-box modelling approaches result in models where the variables and parameters have no economic interpretation. Companies who develop macroeconomic scenario models such as Ortec Finance,...

A Reference-based Design Approach: in Preliminary Ship Design

Design decisions which are made in the preliminary ship design phase have a significant influence on the performance and total cost of a ship. These design decisions are mostly made with very little knowledge of the ship design problem. In fact, it is the personal experience of the naval architect which plays a significant role in this phase of...

A data driven method for optimal sensor placement in multi-zone buildings

In this paper, we propose a data-driven methodology to identify the optimal placement of sensors in a multi-zone building. The proposed methodology is based on statistical tests that study the (in) dependence of measurements from various available sensors. The tests advice on a set of most dissimilar sensors to be retained, as they would...

System Identification of the Delfly Nimble: Modeling of the Lateral Body Dynamics

Flapping wing micro air vehicles (FWMAV's) are a subcategory of unmanned aerial vehicle which use flapping wings for thrust generation. The high agility and maneuverability of FWMAV's are very favorable attributes, making them more applicable in cluttered spaces. A tailless FWMAV called the Delfly Nimble has been developed at the Delft...

Trim optimization for ships in service: A grey-box model approach using operational voyage data

Trim optimization is an approach considered by the industry to improve the energy efficiency of ships, having a potential in both reducing operational costs and to decrease the emissions of the ship. Potential fuel consumption reduction by trim optimization is 0.5 to 3 % and to up to 7% in extreme cases. Stolt Tankers, a shipping company active...