Filtyp
The purpose of this thesis was to examine the possibilities to control a process containing a resonance frequency. System identification was made on a process containing a resonance frequency. The identification resulted in a model of the process. Different regulators that were capable of dealing with the resonance frequency were designed for the model. Finally one regulator was implemented and us
In this report we study systems governed by the Saint-Venant shallow water equations interacting with boundary conditions including control. We derive closed form formulas for the open-loop behavior. These formulas rely on first, second and third order approximations which are based on a perturbation that we develop. Properties of these solutions are studied and comparisons with existing non-linea
Many control objectives can be expressed in terms of a criterion function. Generally, explicit solutions to such optimization problem require full knowledge of the plant and disturbances and complete freedom in the complexity of the controller. In practice, the plant and the disturbances are seldom known, and it is often desirable to achieve the best possible performance with a controller of presc
The HCCI engine has potential to replace the spark ignition and compression ignition engines of today. One of the main problems in making the engine commercially attractive is that there are no direct means of controlling the ignition phasing. This thesis attempts to describe a method for system identification of the HCCI process, and development of an effective LQG regulator for the combustion pr
Through the years, cranes have been used extensively for many different tasks. For example construction work, shipbuilding and cargo transportation. One of the tedious tasks that cranes perform is loading and unloading containers. This is a process which can be optimized with the aid of control theory. While moving cargo, the crane operator must make sure that crane motion does not cause the cargo
In this master thesis an equipment for measuring the quality on various grains within the agricultural industry is being investigated. The equipment is manufactured by FOSS Tecator a company situated in the beautiful city of Höganäs in Sweden. The food-analyzing is conducted with so called NIR-spectrometry, a method in which the grain is exposed to light with various wavelengths. The different wav
This thesis investigates what mechanisms that contribute to the interaction between lateral and vertical dynamics in a fourwheeled vehicle. For this a vehicle model was derived. To capture all the essential dynamics of the vehicle, both a horizontal model and a vertical model was used. The interaction between the models turned out to be quite evident, making it possible to use the active suspensio
This master thesis project commissioned by Haldex Brake Products AB (in Landskrona, Sweden), and in association with the Department of Automatic Control, Lund Institute of Technology, deals with the problem of correct wheel speed measurements. Investigation into different types of sensors, Inductive-, Hall Effect- and Magneto-Resistive sensors have been carried out, which are sensors that may be u
A method for generating minimum time yacht routes for short distances while avoiding stationary obstacles and taking into account wave and water current disturbances is sought. The method should be feasible for use in an autopilot type construction. A solution is found using an iterative forumulation of the dynamic programming algorithm on a grided state space and an implementation in ANSI C is pr
In this paper analysis of interconnected dynamical systems are considered. A solid framework for the analysis of the stability of interconnection is given. The results from Fax and Murray (2002) that studies the SISO-case for a constant interconnection matrix are generalized to the MIMO-case where arbitrary interconnection is allowed. The analysis show existence of a separation principle that is v
In this project the control of the gait of a seven degree of freedom biped robot restricted to the sagittal plane is investigated. The gait of the biped is modeled as a hybrid system of four states, corresponding to four relevant phases of the gait. The modeling of the impact between the feet and the ground results in a non-continuous relationship between the coordinate velocities before and after
The purpose of this essay has been to examine which ideal image lies ahead for men to identify with, concerning appearance and status as well as the main presentation of masculinity. Further the purpose was to examine whether the image of the ideal man according to today’s mass media, affect everyday men in their everyday- and lifechoices and whether it has affected their self-esteem and their sen
In this master thesis the load effect factors for 448 fictitious bridges, with different modes, have been examined. All analysis has been carried out in a finite element program. Bridge types that have been investigated are composite bridges and concrete beam bridges with a single beam, referred to as single beam bridges. For the analysis the main difference between the two bridge types is that to
Idag vårdas 10 % av alla patienterna på vårdavdelning till följd av vårdrelaterad smitta, ofta relaterat till ofullständig handhygien, vilket leder till onödigt lidande för patienterna och extra vårdkostnader. Sjuksköterskor har ett stort ansvar då de arbetar nära patienter varje dag. Syftet med studien var att beskriva betydelsen av följsamhet samt konsekvenser avseende sjuksköterskans handhygien
Den här magisteruppsatsen är baserad på en översättning av den italienska bilderboken Antonia e le bottiglie di Morandi, som i sin tur är inspirerad av den svenska förlagan Linnéa i målarens trädgård. Uppsatsen består av en källtextanalys enligt metoden i Vägar genom texten av Hellspong och Ledin (1997). Därefter följer överväganden inför översättningen med val av strategier som behandlas i boken
Value at Risk is a commonly used risk measure which calculates the smallest losses you risk to lose from having an asset, given a certain risk level and time period. Even though Value at Risk is applicable to all different types of assets, some studies suggest that this risk measure is not suitable for developing countries/emerging markets. This is because these countries’ assets generate very obs
Denna uppsats syftar till att undersöka om ökad kunskap och ökat intresse för EU kan öka valdeltagandet i Europaparlamentsvalet enligt svenska studenter, då det svenska valdeltagandet i Europaparlamentsvalet är väldigt lågt i förhållande till valdeltagandet i det svenska riksdagsvalet. Tidigare forskning som presenteras försöker påvisa eller dementera att det finns ett demokratiskt underskott i EU
Cultural integration has been recognized as an inevitable feature in the making of a coherent European Union, and for further approval of systematic integration. The initial cultural policy of the Union was based on normative assumptions and essentialist views on a European civilization. But issues in legitimization made for a more relativistic stance, and since the 70:ies, a more pluralistic appr
I rapporten har ett av de större entreprenadföretagens, Skanska Sverige ABs, arbete kring riskinventeringar studerats. Enligt deras föreskrivna rutiner och arbetssätt startar riskhanteringsarbetet redan i anbudsskedet och ska genom hela projektet, och under produktionen, uppdateras. Förutsättningar finns för att göra riskarbetet kontinuerligt, men enligt personerna som intervjuats verkar det inte
Foraminiferer förekommer i marina sediment i världens hav och utgör en värdefull proxymetod för att rekonstruera vattendjup, strömmar, produktivitet och syrenivån vid djuphavsmassor. Valet av storleksfraktion som används när studier på bentiska djuphavs-foraminiferer utförs har visat sig ha betydelse när ekologisk fauna vid upvällningsregioner studeras. En genomgång av tidigare studier har visat aForaminifera are abundant in the marine sediment in all of the worlds’s oceans and offer a valuable proxy method to reconstruct water depth, circulation, productivity and deep water aeration. The choice of size fraction used when studying benthic foraminifera in upwelling areas are important. A review of 15 earlier studies where benthic foraminifera has been analysed, has shown that there are diff
