Porous Network Concrete: A bio-inspired building component to make concrete structures self-healing

The high energy consumption, its corresponding emission of CO2 and financial losses due to premature failure are the pressing sustainability issues which must be tackled by the concrete infrastructure industry. Enhancement of concrete materials and durability of structures (designing new infrastructures for longer service life) is one solution...

Underground Reservoir Identification Using Generalized Wellbore Data

We present a novel method for estimating physical properties of an underground hydrocarbon reservoir, on the basis of generally measured wellbore ow rate and pressure signals at the bottom of a producing well. The method uses instrumental variable-based system identification techniques to solve for a closed-loop errors-in-variables problem....

Value of information in closed-loop reservoir management

This paper proposes a new methodology to perform value of information (VOI) analysis within a closed-loop reservoir management (CLRM) framework. The workflow combines tools such as robust optimization and history matching in an environment of uncertainty characterization. The approach is illustrated with two simple examples: an analytical...

Optimal Control of Water Systems Under Forecast Uncertainty: Robust, Proactive, and Integrated

Water systems consist of natural and man-made objects serving multiple essential purposes. They are affected by many types of meteorological disturbances. In order to deal with these disturbances and to serve the desired objectives, infrastructures have been built and managed by societies for specific purposes. Given a water system, and its...

The development of a Product Service System for a Bugaboo stroller

In this thesis a product service system for a Bugaboo stroller is developed. The main objectives are to come up with a PSS that has benefits for people, planet and profit. The objectives are defined as follows: 1. People: The PSS should convince people to lease a stroller instead of buying one. 2. Planet: The PSS should be a sustainable...

Identification of the contribution of the ankle and hip joints to multi-segmental balance control

Background Human stance involves multiple segments, including the legs and trunk, and requires coordinated actions of both. A novel method was developed that reliably estimates the contribution of the left and right leg (i.e., the ankle and hip joints) to the balance control of individual subjects. Methods The method was evaluated using...

Closed-loop Operated Time-Based Accelerometer

A high-resolution, high dynamic range capacitive accelerometer based on pull-in time measurement is described in this paper. The high sensitivity of pull-in time can be used to implement high performance accelerometers, but non-linearity and low dynamic range compromise device performance. A closed-loop approach using an electrostatic actuation...

Characterization and closed-loop AO performance of a liquid deformable mirror

Closed-loop adaptive optical correction using a deformable mirror based on the total internal reflection (TIR) from an electrostatically deformed liquid-air interface was performed on a collimated beam of a HeNe-laser that was aberrated by a rotating phase disk. The frequency response of the system was measured and the influence of liquid...

Advanced Systems Theory Applied to AMB Systems

In this thesis we look at the application of advanced systems theoretic algorithms for an experimental Active Magnetic Bearing System (AMB). These systems are inherently unstable and therefore require a feedback controller. Accurate modeling of these systems with input-output data is hindered due to the strong correlation between the inputs and...

Developing the Closed-loop Supply Chain in the Asphalt Industry: A Case Study at BAM Wegen

BAM Wegen, a contractor specialized in road construction and maintenance and (partial) owner of eight asphalt factories in the Netherlands, indicated to have efficiency problems with their reverse logistics activities; all activities needed to reclaim used asphalt. This research therefore aimed at finding a method to better control the supply...

Functions of reuse and recycling in the service economy

The present paper aims at communicating the business world the vision of sustainable competitiveness entailing the adoption of the new business models of producing, selling and maintaining performance over time. These models include strategies that can head firms in designing and producing goods that facilitate the efficient use of resources...

ForBuS: A Tool to Form a Business Strategy

In this graduation report companies who lack in having a clear and supported business strategy are offered a solution. This solution comes in the form of a business strategy forming tool: ForBuS. ForBuS is based on extensive literature research where the closed loop management system of Kaplan & Norton (2008) is used as basis. ForBuS is an...

Maintaining the management of maintenance logistics: Detecting and analyzing process instability in a closed-loop supply chain

KLM’s Components Services is responsible for availability of repairable aircraft components for KLM and third party airliners; on behalf of planned and unplanned maintenance. Repairable aircraft components are interchangeable. Hence the realization of components availability includes monitoring components flowing through a continuous cycle that...

Re-entry flight clearance

The objective of the research was to identify and evaluate promising mathematical techniques for re-entry flight clearance. To fulfil this objective, two mathematical methods were investigated and developed: μ analysis for linear models and interval analysis for both linear and non-linear models. The stability of re-entry vehicles in the...

Numerical Evaluation of a Perspective Flightpath Display: Influence of Design and Positioning System Parameters on Closed Loop Stability

This report describes the results of a fundamental research on the DELPHINS Tunnel-in- the-Sky display. This display is a perspective flightpath display and is developed at the laboratory of Telecommunications and Traffic Control Systems. The main goal of this research is the development of a simulation tool. With this tool the effects of...

Identification of closed loop systems: Identifiability, recursive algorithms and application to a power plant