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This thesis describes the development of an autonomous weeding vehicle for the agricultural industry. It has been done as a project at RMIT University in Melbourne and the aim was to develop a design for the vehicle which could later be used to develop a commercial product. The current trend in the agricultural industry is larger machines that can benefit from economies of scale. These heavy mac
The thesis focuses on the design of a laboratory setup for a 100 kW fuel cell system, intended for heavy-duty vehicle applications. The increasing interest in Proton Exchange Membrane (PEM) fuel cells as a viable alternative for long-haul transport stems from the limitations of battery-electric vehicles, particularly due to the weight and energy density constraints of current battery technologies.
Det ökande byggandet av stadsvägtunnlar, de alpina tunnelolyckorna runt millennieskiftet, och det efterföljande EU-direktiv (2004/54/EC) med minimikrav gällande brandsäkerhet har placerat brandsäkerhet i vägtunnlar högt på dagordningen. Samtidigt är moderna enkelriktade vägtunnlar ofta bland de säkraste delarna av vägsystemet. Har vi kommit till en punkt där resurserna används bättre någon annanstThis thesis can be described as a journey in performance-based fire safety design. Along the way questions such as what fire safety is, how it can be measured, whether we are posing the right questions, or engineer the best solutions, have arisen. The safety journey naturally started out with the traditional view, with fire safety engineering based on limit-based design. Using this paradigm the sa
During recent years, several spectacular collapses happened in large timber structures and the question is what can be done to prevent future failures. The main hypothesis for this project has been that quality assurance, control systems and improved training may be necessary, since the unwanted events are primarily related to human errors. A survey of failures in 127 timber structures has been ma
Temporary surveillance with an easily deployable surveillance unit can give a tactical advantage for police in situations when big crowds suddenly gather. It can also be used by fire department during fires or in the private security sector on construction sites and other such temporary areas requiring surveillance. This report describes the process of developing the climbing system for such a sur
In this thesis we analyze the concepts of dependability and dependable systems. We investigate methods of designing and implementing dependable systems, in general, and on the Android operating system. A literature review was carried out with two main goals. Firstly, to gain and be able to spread knowledge of dependability according to both its qualitative and quantitative definitions. Secondly, t
The final purpose of this project is to create a platform that leads to the improvement of the braking feeling by the users of heavy vehicles. The complexity of the problem lays on the different constraints: geometrical and functional, and as well on the interaction with a human operator. The task is to design a new electronic brake pedal, with the possibility to change the relationship between fo
This work adds a quantitative description of distortion to the structured design method of negative-feedback amplifiers. It constitutes a power-series representation of the feedback amplifier, which may include dynamic (memory) effects, where the design parameters appear explicitly. These results have been incorporated into the systematic design method. It now includes design steps for calculating
This thesis is about Turbo codes - codes constructed via parallel concatenation of two recursive convolutional encoders linked by an interleaver. The focus of the work is on the understanding and design of Turbo codes. This includes thorough investigation of central components that influence Turbo code performances, such as the constituent encoders and the interleaver, as well as the procedure of
Design rules for optimal feedforward controllers with lead-lag structure in the presence of measurable disturbances are presented. The design rules are based on stable first-order models with time delays, FOTD, and are optimal in the sense of minimizing the integrated-squared error. The rules are derived for an open-loop setting, considering a step disturbance. This paper also discusses a general
The following article reports result from an extensive study with 25 blind users from Italy and Sweden performed during the summer 2001. The tasks reported here test recognition of geometrical objects, recognition of VRML objects, mathematical surfaces and navigation in a traffic environment. The outcome of these tests show that blind users are able to handle also quite complex objects and environ
This report is the result of a Master thesis project performed in collaboration with Lund University and Axis Communications AB. Axis Communications develop network cameras for security surveillance and the headquarter is located in Lund, Sweden. The goal of this project was to identify an opportunity where the combination of a camera integrated in a lamp can be useful and in a development process
