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A 3G mobile phone must have the ability to control its output power with high precision. A power detector is used to measure the actual power outputted by the power amplifier to the antenna. With higher data rates the traditional implementations with peak detectors have become very difficult to use, which is why true RMS detectors are needed. In this thesis the digital part of a true RMS detector
Genetic regulatory networks are biochemical reaction systems, consisting of a network of interacting genes and associated proteins. The dynamics of genetic regulatory networks contain many complex facets that require careful consideration during the modeling process. The classical modeling approach involves studying systems of ordinary differential equations (ODEs) that model biochemical reactions
This master thesis concerns the current and future development in the area of intelligent houses and home automation. It also describes a system for home automation developed for this thesis. Key words in the design are dynamic behaviour, flexibility, transparency and adaptability. The prototype has been built with a central, Java based, server. To this server, modules handling different communica
To simplify the programming of industrial robots a method called lead-through programming has been developed where the programmer basically leads the robot using his/her hands. The objective of this thesis has been to see how a safety system (protecting the tool from large forces) for a lead-through programming controller could be achieved by using an extra force sensor mounted at the tool. A modi
By measuring structure-borne sound from bearings, a conclusion about their condition can be made. The measurements are done with accelerometers which should be attached as close as possi-ble to the bearing. The signal from the accelerometer may have to be lowpass filtered before being A/D-converted and stored. These steps have to be done in real time. The analysis of the signal is done afterwards.
This is the report of a thesis work about controlling an autonomous wheel loader. The objective of the work was to create a complete prototype of an autonomous wheel loader that can operate without any seated driver and without any kind of remote controlling. Another important objective was that this prototype needs to support future development of the autonomous wheel loader. The work was complet
This thesis work focused on the study of a quadrotor helicopter. The dynamic system modelling and the control algorithm evaluation were carried out. To test the results, a simulator and a real platform were developed. The Newton-Euler formalism was used to model the dynamic system. Particular attention was given to the group composed of the DC-motor, the gear box and the propeller which needed als
The 1131-tasks that execute within the 800xA controller have been visualized by implementing three components extending the functionality of the 800xA control and automation platform. The components named TaskVisualizerCommServer (TSCS) and TaskVisualizerCommClient (TSCC) have been added to the controller and control builder respectively and are responsible for data collection and networking. The
The Volvo Group has an ambitious plan to efficiencies its construction equipment vehicles with an introduction of a hybrid engine. This Master thesis is based on, as a first approach, to control the energy split in a hybrid construction equipment vehicle (HCEV) with the control strategy Model Predictive Control (MPC). The work is divided into two main parts, where the first one is to create a piec
Backlash is a well documented and rather common non-linearity which is present in most mechanical and hydraulic systems. The amount of backlash varies depending on the dynamics of the system, for example a gear box in a car needs some space for heat expansion and consequently some amount of backlash in order to function. It is of interest to detect and estimate the amount of backlash automatically
For the performance of the Haldex Active Yaw Control, accurate information about vehicle's lateral dynamic is important. It is for practical reasons not possible to measure the vehicle's lateral velocity, wherefore this state has to be estimated. Previous work [1] with an observer based on a single track bicycle model show promising results but with limited accuracy at high lateral acceler
This Master's Thesis describes the development and implementation of a controller aimed at the climate area business in buildings. Practical design issues for a robust, cheap and yet flexible product is presented. The system should be used in real market applications and the regulator used is equipped with PID-function and an autotuner for easy adjustment. The result can be used for tying heat
The objective of this thesis has been to develop the foundation for a robot system that catches darts. A dart board is to be mounted on a robot. When a dart is thrown at the board, it is detected by cameras, and an algorithm predicts where the dart will hit the board. The goal is then to move the board in such a way that the dart hits at the desired coordinate, typically the bull's eye. This r
In a full duplex system as WCDMA a mobile phone transmits and receives at the same time, but at different frequencies. The transmitted signal will cause interference in the receiver which must be suppressed to not get degraded sensitivity in the receiver. This Master Thesis was carried out at Ericsson Mobile Platforms in Lund and the purpose was to examine a method to suppress the interference in
This thesis describes the development of a object tracking mobile robot. The robot is built on an Olympus IV development board, with an Linux operating system. The camera, used to track a moving object, is an Axis 215 PTZ with a built-in motor. The suitability of the Olympus IV development board and Linux operating system in this context are evaluated. The thesis describes the computer vision and
The study considers the scheduling problem of identical parallel machines subject to minimization of the maximum completion time and the maximum tardiness expressed in a linear convex objective function. The maximum completion time or makespan is the date when the last job to be completed leaves the system. The maximum tardiness is indicated by the job that is completed with the longest delay rela
The Electronic Stability Program (ESP) is becoming increasingly popular in vehicles as a means to prevent spin-out and lane departure accidents, and is nowadays a standard feature in most cars. From 2012 the ESP will also be a standard feature in buses. As a first step, this thesis is dedicated to implementing an ESP for an articulated bus in simulation using Matlab/Simulink. The core of the ESP i
There are different tools for automatic code generation today. A comparison between different tools is necessary in order to highlight the differences between the tools according to specific aspects. TargetLink from dSPACE and Real-Time Workshop Embedded Coder from The MathWorks are two tools that have been evaluated and tested in order to point out the differences between the performance of those
Due to new emission legislations in Europe and in the USA truck manufacturers are facing new difficulties when it comes to meeting these demands. This new legislation will demand more accurate models for simulation and malfunction diagnosis. The NOx emissions, covered in these new laws, are intimately linked to combustion temperatures and these temperatures may be decreased by means of exhaust gas
This master's thesis is about the implementation and evaluation of a small object-oriented automation system. By using a realtime Java VM from Jamaica, a sheet feeding magazine from the machine Tetra Aptiva Aseptic has been controlled. The expectations included to achieve more structured and safer programming, better documentation through UML and to separate application developers from develop
