<p>A process for the analysis and collection of information of software systems has been defined. It extracts relevant information of project source files from an online repository and stores that meta-information in a database for further processing. Then, according to the meta-information in the database, it downloads the source files and writes the feedback information back to the database as well. Now the data can be used as input for various analysis tools, in our case a tool called VizzAnalyzer, which reads the project source code and performs a series of software quality analyses.</p><p>But actually, the process, which is mentioned above needs, a lot of manual work, makes the work inefficient and the analysis of large numbers of projects impossible.</p><p>Thus, a series of thesis projects has been devised to automate the whole process. This thesis aims at automating the information extraction and source file download work, which will make the latter preparation of the analysis task much easier and more efficient.</p>

<p>Detta examensarbete har ägt rum vid Produktionsverkstad 1 (PV1) på Wexiödisk AB där diskmaskiner av huvtyp tillverkas. Syftet med detta examensarbete har varit att undersöka vilka lagerstyrningsmodeller som är lämpliga för att styra avdelningens materialflöden med. Arbetet har genomförts i två steg. Först behandlades artiklar unika för produkterna vid PV1, därefter artiklar gemensamma med andra produkter. Enligt modeller ur relevant litteratur utformades förslag på hur dessa kunde appliceras praktiskt. Förslagen presenterades och diskuterades med berörd personal som valde Tvåbingesystem 2. Ett test gjordes enligt principen ”den japanska sjön” vilket innebar lägre lagernivåer i lastbärarna. De problem som uppstod noterades. Resultatet blev att antalet artiklar som plockades i veckosatser minskades vilket skapat underlag för att minska administrationen av tillhörande plocklistor. Plockvagnen har kunnat tas bort vilket frigjort yta vid monteringsavdelningen. Förutsättningar finns att slå samman två plocklistor till en och därmed förenkla arbetet för förrådspersonalen.</p> / <p>This degree project has been performed at Production unit 1 (PV1) at Wexiödisk AB, where hood type washing machines is manufactured. The purpose of this project has been to investigate which inventory control models that could be suitable to control the section’s material supplies. The work has been accomplished in two steps. At first, items unique to products manufactured at PV1 were treated, followed by items common with other products. According models in relevant literature, suggestions were made to how the models could be applied practically. The suggestions was presented to and discussed with the parties concerned who chose Two-bin system 2. A trial was carried out according to the principle of “the Japanese river” which implied lowered inventory levels. The problems that occurred were noted. The result was that the number of items that was weekly picked and distributed was reduced which has created a basis to also reduce the administration of the systems picking lists. The item wagon has been removed which has cleared floor space at the assembly section. Conditions have been created to merge two picking lists into one and thereby simplify the work for the inventory staff.</p>

The primary objective of this thesis was to study, implement, and test low-cost electronic flight control systems (FCS) in remotely piloted subscale research aircraft with relaxed static longitudinal stability. Even though this implementation was carried out in small, simplified test-bed aircraft, it was designed with the aim of being installed later in more complex demonstrator aircraft such as the Generic Future Fighter concept demonstrator project. The recent boom of the unmanned aircraft market has led to the appearance of numerous electronic FCS designed for small-scale vehicles and even hobbyist-type model aircraft. Therefore, the purpose was not to develop a new FCS from scratch, but rather to take advantage of the available technology and to examine the performance of different commercial off-the-shelf (COTS) low-cost systems in statically unstable aircraft models. Two different systems were integrated, calibrated and tested: a simple, gyroscope-based, single-axis controller, and an advanced flight controller with a complete suite of sensors, including a specifically manufactured angle-of-attack transducer. A flight testing methodology and appropriate flight-test data analysis tools were also developed. The satisfactory results are discussed for different flight control laws, and the controller tuning procedure is described. On the other hand, the different test-bed aircraft were analysed from a theoretical point of view by using common aircraft-design methods and conventional preliminary-design tools. The theoretical models were integrated into a flight dynamics simulator, which was compared with flight-test data obtaining a reasonable qualitative correlation. Possible FCS modifications are discussed and some future implementations are proposed, such as the integration of the angle-of-attack in the control laws.

To cope with dynamics and uncertainties, a novel penalty function-based hybrid, multi-agent shop floor control system is proposed in this dissertation. The key characteristic of the proposed system is the capability of adaptively distributing decision-making power across different levels of control agents in response to different levels of disturbance. The subordinate agent executes tasks based on the schedule from the supervisory level agent in the absence of disturbance. Otherwise, it optimizes the original schedule before execution by revising it with regard to supervisory level performance (via penalty function) and disturbance. Penalty function, mathematical programming formulations, and quantitative metrics are presented to indicate the disturbance levels and levels of autonomy. These formulations are applied to diverse performance measurements such as completion time related metrics, makespan, and number of late jobs. The proposed control system is illustrated, tested with various job shop problems, and benchmarked against other shop floor control systems. In today's manufacturing system, man still plays an important role together with the control system Therefore, better coordination of humans and control systems is an inevitable topic. A novel BDI agent-based software model is proposed in this work to replace the partial decision-making function of a human. This proposed model is capable of 1) generating plans in real-time to adapt the system to a changing environment, 2) supporting not only reactive, but also proactive decision-making, 3) maintaining situational awareness in human language-like logic to facilitate real human decision-making, and 4) changing the commitment strategy adaptive to historical performance. The general purposes human operator model is then customized and integrated with an automated shop floor control system to serve as the error detection and recovery system. This model has been implemented in JACK software; however, JACK does not support real-time generation of a plan. Therefore, the planner sub-module has been developed in Java and then integrated with the JACK. To facilitate integration of an agent, real-human, and the environment, a distributed computing platform based on DOD High Level Architecture has been used. The effectiveness of the proposed model is then tested in several scenarios in a simulated automated manufacturing environment.

A process for the analysis and collection of information of software systems has been defined. It extracts relevant information of project source files from an online repository and stores that meta-information in a database for further processing. Then, according to the meta-information in the database, it downloads the source files and writes the feedback information back to the database as well. Now the data can be used as input for various analysis tools, in our case a tool called VizzAnalyzer, which reads the project source code and performs a series of software quality analyses. But actually, the process, which is mentioned above needs, a lot of manual work, makes the work inefficient and the analysis of large numbers of projects impossible. Thus, a series of thesis projects has been devised to automate the whole process. This thesis aims at automating the information extraction and source file download work, which will make the latter preparation of the analysis task much easier and more efficient.

Analysis of simplex search and design of algorithmic system synthesis methods is performed in the current PhD thesis. The main objective is to create algorithmic methods for stochastic automatic control system synthesis, filter synthesis and algorithmic methods of variational calculus. Algorithmic methods allow solving system synthesis problems in cases when mathematical object is complex or it does not exist, when statistical characteristics of operating signals are unknown, i.e. when application of classical system synthesis methods is impossible. / Disertacijoje atliekami simpleksinės paieškos tyrimai ir nagrinėjama algoritminės sistemų sintezės metodų sudarymo problema. Pagrindinis disertacijos tikslas yra sukurti algoritminius stochastinių automatinio valdymo sistemų, filtrų sintezės bei variacinio skaičiavimo metodus. Algoritminiai metodai leidžia spręsti sistemų sintezės uždavinius, kuomet objekto matematinis modelis sudėtingas arba jo išvis nėra, kai nežinomos stochastines sistemas veikiančių signalų statistinės charakteristikos, t. y. kai klasikinių sistemų sintezės metodų taikymas yra neįmanomas.

Disertacijoje atliekami simpleksinės paieškos tyrimai ir nagrinėjama algoritminės sistemų sintezės metodų sudarymo problema. Pagrindinis disertacijos tikslas yra sukurti algoritminius stochastinių automatinio valdymo sistemų, filtrų sintezės bei variacinio skaičiavimo metodus. Algoritminiai metodai leidžia spręsti sistemų sintezės uždavinius, kuomet objekto matematinis modelis sudėtingas arba jo išvis nėra, kai nežinomos stochastines sistemas veikiančių signalų statistinės charakteristikos, t. y. kai klasikinių sistemų sintezės metodų taikymas yra neįmanomas. Disertaciją sudaro septyni skyriai, iš kurių paskutinis – rezultatų apibendrinimas. Pirmajame (įvadiniame) skyriuje nagrinėjamas problemos aktualumas, formuluojamas darbo tikslas bei uždaviniai, aprašomas mokslinis darbo naujumas, pristatomi autoriaus pranešimai ir publikacijos, disertacijos struktūra. Antrasis skyrius skirtas literatūros apžvalgai. Jame analizuojami paieškinio optimizavimo, optimalaus valdymo, AVS optimizavimo uždaviniai, optimizavimo objektų savybės, pateikta paieškinio optimizavimo metodų charakteristika, aprašyti kintamos struktūros valdymo sistemų sintezės principai, variacinio skaičiavimo metodai ir simpleksinės paieškos savybės. Trečiajme disertacijos skyriuje pateiktos stačiakampio simplekso taisyklės, paieškos statistinių charakteristikų skaičiavimo metodika, charakteristikų skaičiavimo teoriniai ir modeliavimo eksperimentiniai rezultatai. Ketvirtajame disertacijos skyriuje pateikti stochastinių... [toliau žr. visą tekstą] / Analysis of simplex search and design of algorithmic system synthesis methods is performed in the current PhD thesis. The main objective is to create algorithmic methods for stochastic automatic control system synthesis, filter synthesis and algorithmic methods of variational calculus. Algorithmic methods allow solving system synthesis problems in cases when mathematical object is complex or it does not exist, when statistical characteristics of operating signals are unknown, i. e. when application of classical system synthesis methods is impossible. The thesis is divided into seven chapters including the conclusion’s chapter. First chapter is dedicated for an introduction to the problem and its topicality. There are also formulated purposes and tasks of the work; the used methods and novelty of solutions are described; author‘s publications and structure of the thesis are presented. Second chapter covers an analysis of existing publications related with problems of the thesis. Search optimization algorithms, optimal control, automatic system optimization problems are analyzed, characteristics of search optimization algorithms are presented, the principles of variable structure system synthesis, variational calculus methods and simplex search characteristics are described. In the third chapter the rules of rectangular simplex search, the methods to calculate statistical characteristics of search, the results of characteristics calculation and experimental results of... [to full text]

The variable rate fertilizer spreader was modified to control each pair of nozzles for spot-application of fertilizer only in plant areas of wild blueberry fields. The experiments were conducted to evaluate performance accuracy of modified variable rate granular (MVRG) fertilizer spreader. The results suggested that the MVRG fertilizer spreader performed efficiently in detecting bare spots/weed patches and clay filler application only in green grass/plant areas. Two wild blueberry fields were selected to evaluate the impact of MVRG spreader on nutrient leaching through small bare spots/weed patches. Management zones were delineated on the basis of slope variability. The MVRG spreader significantly reduced the nutrient loading in subsurface water samples collected from the bare spots/weed patches. Based on the results obtained, it can be concluded that the fertilization in wild blueberry fields using MVRG fertilizer spreader can result in the protection of subsurface water quality, thus protecting the environment.

This thesis investigates using processor-in-loop techniques with non-real-time electro-magnetic transient simulation software for designing microcontroller-based systems. The behaviour of a microcontroller is included in the simulation by directly integrating the target microcontroller into an EMTP co-simulation. Additionally, to assist the design process, the optimization functionality of the EMTP program is extended to the microcontroller algorithm. Since non-realtime simulation does not require specialized test hardware to accurately simulate systems, it is both cheaper and able to be used earlier in the controller design process then hardware-in-loop real-time simulation. A component is created in the PSCAD / EMTDC program to integrate a generic controller running an arbitrary periodic algorithm into an EMTP simulation. The component operation is verified by creating a co-simulation of a three-phase induction motor V / f. speed control. The co-simulation results match the behaviour of the resulting system under a fairly broad range of operating conditions, highlighting the applicability of the technique.

This thesis work presents a parametrized integration of the flight control system within RAPID by means of the automation in CATIA V5, using Knowledge Pattern. Nowadays aircraft’s design and development processes are not only time-consuming but also incur high economic cost. In addition, system integration is highly a multi-disciplinary design process which often involves a large number of different discipline teams working at the same time and space. The main objective of this thesis is to investigate how CAD (Computer Aided Design) software can be used in the early design stages to define the flight control system integration. The purpose of this work to improve the functionality of an in house produced aircraft conceptual design tool carried out at the Division of Fluid and Mechatronic Systems, Linköping University. The work consists of preliminary integration of the RAPID flight control system and the hydraulics associated to it. By defining several reusable templates, the automatic definition of a flight control system within the RAPID aircraft has been achieved. Moreover it is a parametrical model which allows the user to modify a high number of features as desired to enhance the design process. For this, a user interface in Microsoft Excel connected to CATIA has also been attained.