Dissertations / Theses: 'Control theory'

1

Oh, Sunseek. "A Promising Control Theory." University of Arizona Linguistics Circle, 1989. http://hdl.handle.net/10150/226550.

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Spjøtvold, Jørgen. "Parametric Programming in Control Theory." Doctoral thesis, Norwegian University of Science and Technology, Faculty of Information Technology, Mathematics and Electrical Engineering, 2008. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-2198.

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The main contributions in this thesis are advances in parametric programming. The thesis is divided into three parts; theoretical advances, application areas and constrained control allocation. The first part deals with continuity properties and the structure of solutions to convex parametric quadratic and linear programs. The second part focuses on applications of parametric quadratic and linear programming in control theory. The third part deals with constrained control allocation and how parametric programming can be used to obtain explicit solutions to this problem.

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Zimbidis, Alexandros A. "Control theory and insurance systems." Thesis, City University London, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.287673.

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4

Ovenden, Christopher David. "Towards a theory of control." Thesis, University of Manchester, 2013. https://www.research.manchester.ac.uk/portal/en/theses/towards-a-theory-of-control(ecf7fcd2-5ccd-45e7-a02e-86202c390057).html.

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Control is a concept that has received surprisingly little attention in the philosophy of action and ethics, given its prima facie ties to freedom, responsibility, intentionality and agency more generally. In this collection I take the first step towards an account of agential control: the kind of control that agents commonly exercise over actions, events, and even other agents. In the introduction I give a sketch of the complete thesis on control: characterising agential control as consisting primarily in the restriction or guidance of some process, and secondarily in the continuous monitoring of that same process. I go on to suggest that the primary aspect of control involves an agent’s having the ability to effectively intervene in the process that they are controlling. The collection itself consists of three journal style papers that, whilst not being focussed explicitly on control themselves, begin to fill out the sketch in my introduction: roughly, I think that control requires an ability to intervene (effectively, an ability to do otherwise), I think that ability should be understood as a kind of disposition to effectively intervene in a process should an agent try, and I think that to build a satisfactory conditional account of dispositions we need to appeal to the recently proposed contextualist account of dispositions from David Manley and Ryan Wasserman. The three papers aim to support each of these thoughts: The first paper, ‘The Anti-Akrasia Chip’, presents a counterexample to the well-known Fischer-Ravizza account of guidance control and suggests that what that account lacks is an emphasis on an agent’s being able to effectively intervene in their own behaviour; the second paper, ‘Getting Specific with Manley and Wasserman’, uses a novel counterexample to motivate a particular reading on Manley and Wasserman’s contextualist account of dispositions; and the final paper, ‘Relevant Abilities’, involves a defence of dispositional compatibilism by introducing the notion of a relevant ability: one grounded by the contextualist account of dispositions developed in the previous paper.

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5

Robertz, Daniel. "Formal computational methods for control theory." [S.l.] : [s.n.], 2006. http://deposit.ddb.de/cgi-bin/dokserv?idn=981070019.

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6

Agi, Egemen. "Mathematical Modeling Of Gate Control Theory." Master's thesis, METU, 2009. http://etd.lib.metu.edu.tr/upload/3/12611468/index.pdf.

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The purpose of this thesis work is to model the gate control theory, which explains the modulation of pain signals, with a motivation of finding new possible targets for pain treatment and to find novel control algorithms that can be used in engineering practice. The difference of the current study from the previous modeling trials is that morphologies of neurons that constitute gate control system are also included in the model by which structure-function relationship can be observed. Model of an excitable neuron is constructed and the response of the model for different perturbations are investigated. The simulation results of the excitable cell model is obtained and when compared with the experimental findings obtained by using crayfish, it is found that they are in good agreement. Model encodes stimulation intensity information as firing frequency and also it can add sub-threshold inputs and fire action potentials as real neurons. Moreover, model is able to predict depolarization block. Absolute refractory period of the single cell model is found as 3.7 ms. The developed model, produces no action potentials when the sodium channels are blocked by tetrodotoxin. Also, frequency and amplitudes of generated action potentials increase when the reversal potential of Na is increased. In addition, propagation of signals along myelinated and unmyelinated fibers is simulated and input current intensity-frequency relationships for both type of fibers are constructed. Myelinated fiber starts to conduct when current input is about 400 pA whereas this minimum threshold value for unmyelinated fiber is around 1100 pA. Propagation velocity in the 1 cm long unmyelinated fiber is found as 0.43 m/s whereas velocity along myelinated fiber with the same length is found to be 64.35 m/s. Developed synapse model exhibits the summation and tetanization properties of real synapses while simulating the time dependency of neurotransmitter concentration in the synaptic cleft. Morphometric analysis of neurons that constitute gate control system are done in order to find electrophysiological properties according to dimensions of the neurons. All of the individual parts of the gate control system are connected and the whole system is simulated. For different connection configurations, results of the simulations predict the observed phenomena for the suppression of pain. If the myelinated fiber is dissected, the projection neuron generates action potentials that would convey to brain and elicit pain. However, if the unmyelinated fiber is dissected, projection neuron remains silent. In this study all of the simulations are preformed using Simulink.

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Bellon, James. "Riccati Equations in Optimal Control Theory." Digital Archive @ GSU, 2008. http://digitalarchive.gsu.edu/math_theses/46.

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It is often desired to have control over a process or a physical system, to cause it to behave optimally. Optimal control theory deals with analyzing and finding solutions for optimal control for a system that can be represented by a set of differential equations. This thesis examines such a system in the form of a set of matrix differential equations known as a continuous linear time-invariant system. Conditions on the system, such as linearity, allow one to find an explicit closed form finite solution that can be more efficiently computed compared to other known types of solutions. This is done by optimizing a quadratic cost function. The optimization leads to solving a Riccati equation. Conditions are discussed for which solutions are possible. In particular, we will obtain a solution for a stable and controllable system. Numerical examples are given for a simple system with 2x2 matrix coefficients.

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Yiu, Ka Fai Cedric. "Aerodynamic design via optimal control theory." Thesis, University of Oxford, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.317867.

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Al-Assaf, Y. "Self-tuning control : Theory and applications." Thesis, University of Oxford, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.235033.

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Abouhajar, Alaa Abdulwahab Abdulrahman. "Function theory related to H∞ control." Thesis, University of Newcastle Upon Tyne, 2012. http://hdl.handle.net/10443/1412.

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We define Γ(E), a subset of C³, related to the structured singular value μ of 2x2 matrices. μ is used to analyse performance and robustness of linear feedback systems in control engineering. We find a characterisation for the elements of Γ(E) and establish a necessary and sufficient condition for the existence of an analytic function from the unit disc into Γ(E) satisfying an arbitrary finite number of interpolation conditions. We prove a Schwarz Lemma for Γ(E) when one of the points in Γ(E) is (0,0,0), then we show that in this case, the Carathéodory and Kobayashi distances between the two points in Γ(E) coincide. We also give a characterisation of the interior, the topological boundary and the distinguished boundary of Γ(E), then we define Γ(E)-inner functions and show that if there exists an analytic function from the unit disc into Γ(E) that satisfies the interpolating conditions, then there is a rational Γ(E)-inner function that interpolates.

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Hall, Leslie Devine. "Embezzlement : a management control theory perspective." Honors in the Major Thesis, University of Central Florida, 2002. http://digital.library.ucf.edu/cdm/ref/collection/ETH/id/280.

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This item is only available in print in the UCF Libraries. If this is your Honors Thesis, you can help us make it available online for use by researchers around the world by following the instructions on the distribution consent form at http://library.ucf.edu/Systems/DigitalInitiatives/DigitalCollections/InternetDistributionConsentAgreementForm.pdf You may also contact the project coordinator, Kerri Bottorff, at kerri.bottorff@ucf.edu for more information. Bachelors Business Administration Management

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Fatouros, Stavros. "Approximate algebraic computations in control theory." Thesis, City University London, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.274524.

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Tonita, Robert Jon. "Applications of control theory to economics." Thesis, University of Cambridge, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.608803.

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14

Durham, Wayne. "Contributions to model following control theory." Diss., Virginia Polytechnic Institute and State University, 1989. http://hdl.handle.net/10919/54349.

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A standard form for linear and nonlinear perfect model following control problems is introduced, and the associated control laws developed. The error dynamics of such systems are analyzed with respect to stability of the error. The effects on the error dynamics of measurement errors and parameter variations are also analyzed, and it is seen that the perfect model following control problem is reduced to that of an error regulator. The linear problem is analyzed to show that virtually all common problems are equivalent to standard form problems through similarity transformations. In the standard form, simple expressions for the control law and error dynamics are used to solve the problem. The linear problem is also analyzed with respect to problems of different order model and plant systems, resulting in augmented system equations. These augmented systems are chosen so that the original dynamics are retained, and so that the higher order problem is in the standard form. The standard form problem is then solved as before. Imperfect model following control problems are analyzed, with three associated results. First, a new t€St for perfect model following is developed. Pairs of models and plants that fail this or other tests are imperfect model following control problems. Second, the effect of using perfect model following control laws on such problems is determined to be equivalent to the addition of a forcing function on the error regulator problem. Third, a new approach to the solution of imperfect model following control problems is shown. This approach seeks to find models that simultaneously satisfy the criteria for perfect model following while retaining the desired characteristics of the intended model. The methods developed in this analysis are applied to problems that illustrate all the principles addressed. The final example is a detailed application to a nonlinear simulation of the F-18 airplane involving control of all degrees of freedom over a large range of angles of attack. Ph. D.

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May, B. Scott. "Probabilistic robust control : theory and applications." Diss., Pasadena, Calif. : California Institute of Technology, 1998. http://resolver.caltech.edu/caltechEERL:1997.EERL-97-08.

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16

Schirmer, Sonja G. "Theory of control of quantum systems /." view abstract or download file of text, 2000. http://wwwlib.umi.com/cr/uoregon/fullcit?p9963453.

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Thesis (Ph. D.)--University of Oregon, 2000. Typescript. Includes vita and abstract. Includes bibliographical references (leaves 98-99). Also available for download via the World Wide Web; free to University of Oregon users. Address: http://wwwlib.umi.com/cr/uoregon/fullcit?p9963453.

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Hunt, K. J. "Stochastic optimal control theory with application in self-tuning control." Thesis, University of Strathclyde, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.382399.

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Kalogeropoulos, G. E. "Matrix pencils and linear systems theory." Thesis, City University London, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.355580.

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D'Amelio, Jeffrey David. "Development of a Digital Controller for Motor Control Experiments in the EE472 Lab." DigitalCommons@CalPoly, 2014. https://digitalcommons.calpoly.edu/theses/1339.

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A digital motor controller for student lab use is designed, built, and tested. The controller uses an encoder for position measurement, and an H-bridge to drive the electromechanical plant. A user interface is created to enhance usability of the device. The user interface is able to display key parameters of the control algorithm as well as the state of the system. It is also used to modify the gains and sample rate of the control algorithm. The design of the system is refined, and 10 units are built for the EE472 Digital Controls Lab. The lab manuals for the first 4 experiments are revised to match and support the new system. The possible future for the project is described with some suggestions for improving the system.

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20

Forrest, Stephen Wilson. "Self-tuning LQG control : theory and applications." Thesis, University of Strathclyde, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.284279.

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21

Leventides, J. "Algebrogeometric and topological methods in control theory." Thesis, City University London, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.358988.

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22

Shah, Guarang [Verfasser]. "Bridging Model Predictive Control and Robust Linear Control Theory / Guarang Shah." Aachen : Shaker, 2015. http://d-nb.info/107152786X/34.

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23

Maharaj, Davendra Yukteshwar. "The application of nonlinear control theory to robust helicopter flight control." Thesis, Imperial College London, 1994. http://hdl.handle.net/10044/1/7420.

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Nelson, Derrick. "Control theory why pollution control technologies have failed to keep pace /." CONNECT TO ELECTRONIC THESIS, 2008. http://hdl.handle.net/1961/6202.

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Cadwell, John Andres Jr. "Control of Longitudinal Pitch Rate as Aircraft Center of Gravity Changes." DigitalCommons@CalPoly, 2010. https://digitalcommons.calpoly.edu/theses/426.

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In order for an aircraft to remain in stable flight, the center of gravity (CG) of an aircraft must be located in front of the center of lift (CL). As the center of gravity moves rearward, pitch stability decreases and the sensitivity to control input increases. This increase in sensitivity is known as pitch gain variance. Minimizing the pitch gain variance results in an aircraft with consistent handling characteristics across a broad range of center of gravity locations. This thesis focuses on the development and testing of an open loop computer simulation model and a closed loop control system to minimize pitch axis gain variation as center of gravity changes. DATCOM and MatLab are used to generate the open loop aircraft flight model; then a closed loop PD (proportional-derivate) controller is designed based on Ziegler-Nichols closed loop tuning methods. Computer simulation results show that the open loop control system exhibited unacceptable pitch gain variance, and that the closed loop control system not only minimizes gain variance, but also stabilizes the aircraft in all test cases. The controller is also implemented in a Scorpio Miss 2 radio controlled aircraft using an onboard microprocessor. Flight testing shows that performance is satisfactory.

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Ata, Nurcan Husniye Nur. "Self control and debt: theory and evidence." Doctoral thesis, Universitat Autònoma de Barcelona, 2009. http://hdl.handle.net/10803/4088.

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A la hora de comprar a crédito, la evidencia empírica así como la meramente anecdótica sugieren que los consumidores se centras más en la cuantía de los pagos mensuales que en el tipo de interés del préstamo o la cantidad total que han de pagar. Los dos primeros capítulos de esta tesis exploran el papel del los problemas de auto control a la hora de explicar este comportamiento. Nuestro análisis se basa en el supuesto de descuento hiperbólico (Laibson (1997)) como forma de modelar el auto control. En el primer capitulo de la tesis consideramos un modelo de equilibrio parcial en el que la duración del préstamo y el tipo de interés están fijos y los consumidores pueden elegir cuánto tomar prestado y como repartir la devolución del préstamo entre los diferentes periodos. Mostramos que tener problemas de auto control implica mayores niveles de endeudamiento y que ser consciente de estos problemas o poseer la capacidad de comprometerse a un curso de acción reduce la presión sobre esos niveles. También demostramos que tener problemas de auto control y ser naif sobre ellos puede inducir una preferencia por los préstamos que requieren mayores cuotas hacia el final de su duración. El segundo capitulo analiza la interacción entre un prestamista monopolístico y un consumidor con descuento cuasi hiperbólico en un modelo en el que asumimos cuotas mensuales idénticas y permitimos al consumidor elegir entre distintas duraciones del préstamo. Obtenemos que mientras el tipo de interés del préstamo permanezca por encima del tipo de interés de mercado, en un contrato de equilibrio los consumidores con preferencias dinámicamente inconsistentes eligen préstamos con mayor duración (y por lo tanto con cuotas mensuales más bajas) El tercer capitulo de esta tesis, un trabajo conjunto con Alena Bicakova, proporciona evidencia empírica sobre el impacto de los problemas de auto control en el comportamiento de los consumidores a la hora de pagar sus deudas. El análisis viene motivado por resultados de encuestas que indican que un porcentaje significativo de los prestatarios atribuyen a una mala gestión de la deuda sus dificultades financieras. Esto contrasta con el argumento económico estándar según el cual la falta de pago de una deuda se debe a shocks negativos inesperados ya sea en los ingresos o en los gastos. Nuestra conjetura es que la mala gestión de la deuda y la falta de autocontrol están relacionadas y que tienen efectos adversos sobre el comportamiento de los prestatarios a la hora de devolver su deuda. Con el fin de verificar esta conjetura utilizamos una base de datos única en su naturaleza y procedente de una organización benéfica dedicada a la orientación a consumidores con créditos del Reino Unido. La orientación de crédito asiste a prestatarios seriamente endeudados mediante la elaboración y administración de unos planes de repago llamados Planes de Gestión de Deuda (DMP en ingles). Mostramos que la probabilidad de abandonar un DMP aumenta en un 12% y en un 31% respectivamente cuando las razones que se aducen para explicar el exceso de deuda (relacionadas con su mala gestión) y fumar se utilizan como indicadores. Como hasta cierto punto estos indicadores pueden usarse como una medida aproximada de los problemas de auto control, nuestros resultados sugieren una potencial relación entre las tasas de morosidad y la falta de auto control. When buying on credit, anecdotal and empirical evidence suggest that the consumers focus more on the size of the monthly payments than on the interest charged on the loan or the total amount they pay. The first two chapters of this thesis aim to explore the role of self-control problems in explaining this puzzling behaviour. Our analysis relies on the assumption of the "quasi-hyperbolic discounting" (Laibson (1997)) to model self-control. In the first chapter of the thesis, we consider a partial equilibrium setting in which the loan maturity and the interest rates are fixed and the consumers can choose how much to borrow and how to allocate the repayments between different periods. We show that having self-control problems implies higher levels of borrowing whilst awareness of self-control problems or a lack of commitment puts downward pressure on that level. We also demonstrate that having self-control problems and being naive about them can induce a preference for back-loaded repayment plans which require higher repayments towards the end of the loan term. The second chapter looks at the interaction between a monopolistic lender and a consumer with quasi-hyperbolic discounting in a setting where we assume equal monthly payments and allow the consumer to choose between different loan maturities. We show that when market risk free rate exceeds the long run discount rate, in an equilibrium contract, the consumers with dynamically inconsistent preferences choose the loan with longer maturity (hence lower monthly payments). Third chapter of this thesis, which is a joint work with Alena Bicakova, provides empirical evidence on the impact of self-control problems on consumers' debt repayment behaviour. The analysis is motivated by the survey evidence which shows that a significant percentage of borrowers blame the debt mismanagement as the reason for running into financial troubles. This contrasts with the standard economic argument that default on debt is caused by the unexpected negative shocks to income or to expenditure. Our conjecture is that the debt mismanagement and lack of self-control are linked, and they have adverse effects on the debt repayment performance of the borrowers. In order to test this conjecture, we use a unique administrative data set of a major consumer credit counselling charity in the UK. Credit counselling assists heavily indebted borrowers by setting up and administering repayment plans, so called debt management plans or DMPs. We show that probability of dropping out from a DMP increases by 12 per cent and 31 cent when the self-reported reasons for becoming overindebted (related to debt mismanagement) and smoking are used as indicators, respectively. To the extent that these indicators can be used as a valid proxy for self-control problems, our results point to a potential link between default rates and lack of self-control.

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Broncano-Berrocal, Fernando. "Luck and the control theory of knowledge." Doctoral thesis, Universitat de Girona, 2013. http://hdl.handle.net/10803/129460.

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This thesis presents a diagnosis of the problem of luck in epistemology and an analysis of the concept of knowledge. Part I gives an account of the ordinary concept of luck. Part II gives an account of the philosophical notion of epistemic luck and develops an original account of the concept of knowledge: the control theory of knowledge Aquesta tesi presenta un diagnòstic del problema de la sort en epistemologia i una anàlisi del concepte de coneixement. La primera part ofereix una teoria del concepte ordinari de sort. La segona part ofereix una teoria de la noció filosòfica de sort epistèmica i desenvolupa una teoria original del concepte de coneixement: la teoria del control

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Doruk, Resat Ozgur. "Missile Autopilot Design By Projective Control Theory." Master's thesis, METU, 2003. http://etd.lib.metu.edu.tr/upload/4/1089929/index.pdf.

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In this thesis, autopilots are developed for missiles with moderate dynamics and stationary targets. The aim is to use the designs in real applications. Since the real missile model is nonlinear, a linearization process is required to get use of systematic linear controller design techniques. In the scope of this thesis, the linear quadratic full state feedback approach is applied for developing missile autopilots. However, the limitations of measurement systems on the missiles restrict the availability of all the states required for feedback. Because of this fact, the linear quadratic design will be approximated by the use of projective control theory. This method enables the designer to use preferably static feedback or if necessary a controller plus a low order compensator combination to approximate the full state feedback reference. Autopilots are checked for the validity of linearization, robust stability against aerodynamic, mechanical and measurement uncertainties.

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Terje, Berg. "Business Control in a Theory-Practice Perspective." Doctoral thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for industriell økonomi og teknologiledelse, 2014. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-24313.

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There is a never-ending debate about practice relevance within management accounting and control research. This dissertation contributes to an understanding of the gap claimed between theory and practice. The concepts of theory and practice are discussed, and the key finding is that there is no unanimous definition of the concepts, something which may contribute to confusion about the content of the gap. Moreover, in addition to having multiple meanings, the concepts are often applied implicitly. In this dissertation, the concepts are considered according to the following: (1) theory as ideas and hypotheses which explain something, and (2) practice as a translation of these ideas into action. The gap is a discrepancy between the ideas and how these ideas are executed. There is an underlying assumption that this gap matters only if theories in some way do not have an impact on managerial decisions. The papers describe certain situations where this gap is present and relevant. Based on a multiple case study, Paper 1 investigates the ideals of risk reporting in light of the concept of enterprise risk management, a concept that is introduced by consultants and promoted by governing bodies. The main finding is that the ideals of enterprise risk management are not implemented in practice. The topic of Paper 2 is the use of investment analysis techniques and choice of cost of capital. The survey shows that net present value and weighted average cost of capital have the most widespread use. The paper discusses possible causes and consequences of the gap between theory and practice among these well-established methods. The purpose of Paper 3 is to study whether the introductory budgeting textbooks have changed over the past 20 years, as expected based on criticism from both academics and practitioners. This bibliographic study of an important bridge between theory and practice finds only minor traces of the critique being incorporated in new editions of textbooks. Paper 4 addresses the question of how cost-based pricing can be performed in the presence of uncertainty and risk. The paper exemplifies one possible strategy for determining internal and external prices in order to reduce the risk of losses that arise from under-allocation of costs. In contrast to the other three papers, this one is normative. In addition, the introduction presents a normative framework which can be applied by researchers to précis in their communication with businesses the purposes for which certain objects are studied. Practitioners can apply the framework when configuring their control package. The introduction closes with specific implications of the dissertation for researchers, lecturers and practitioners, three target groups with different perspectives on management accounting and control. All over the present work also contribute to management accounting and control research by applying mixed-methods and thus crossing paradigms something which is rarely observed in the literature. Denne avhandlingen bidrar til å øke forståelse av et ofte påstått gap mellom teori og praksis innen økonomistyring. Et sentralt funn er at det ikke er noen entydig definisjon av begrepene, videre at disse ofte benyttes implisitt slik at definisjonen tas for gitt. Dette bidrar snarere til å skape forvirring om gapet enn å fylle det med innhold. I denne avhandlingen defineres teori som ideer og hypoteser som skal forklare et fenomen, mens praksis er hvordan disse ideene benyttes av bedriftene. Gapet er avviket mellom ideene og hvordan disse utøves. Det er en underliggende antakelse om at gapet kun betyr noe dersom teoriene ikke har innflytelse på ledelsens beslutninger. Avhandlingens fire artikler beskriver ulike situasjoner hvor gapet er til stede og relevant. Den første artikkelen ser nærmere på hvorvidt risikorapportering til styrer utøves i henhold til idealene i såkalt Enterprise Risk Management. Hovedfunnet er at idealene ikke er implementert i praksis. Den andre artikkelen ser på bruk av investeringsanalysemetoder og avkastningskrav. Nåverdimetoden og bedriftens totalavkastningskrav er mest utbredt. Den tredje artikkelen ser på hvorvidt akademikere og praktikeres kritikk av budsjettering er inntatt i innføringsbøkene i budsjettering. Kun mindre spor av kritikken finnes. Den fjerde artikkelen skiller seg noe fra de øvrige ved å foreslå en normativ modell for å håndtere usikkerhet og risiko i forbindelse med kostnadsallokering. I tillegg til artiklene, presenterer innledningen et rammeverk som kan benyttes av forskere i kommunikasjonen med praksis for å tydeliggjøre hva man til enhver tid studerer. Praktikere, på sin side, kan benytte rammeverket når de setter sammen sin styringspakke. Innledningen avslutter med konkrete implikasjoner for forskere, forelesere og praktikere, tre målgrupper som har ulike perspektiver på økonomistyringen. I tillegg bidrar avhandlingen til økonomistyringsforskningen ved å anvende ulike metoder. Dermed krysses paradigmer, noe som sjeldent forekommer i den akademiske litteraturen.

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Flynn, Emma. "Theory of mind, representation and executive control." Thesis, University of Nottingham, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.364662.

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Zenios, Stefanos A. (Stefanos Andrea). "Health care applications of optimal control theory." Thesis, Massachusetts Institute of Technology, 1996. http://hdl.handle.net/1721.1/11042.

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Gawlick, Rainer. "Admission control and routing : theory and practice." Thesis, Massachusetts Institute of Technology, 1995. http://hdl.handle.net/1721.1/36636.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1995. Includes bibliographical references (leaves 183-190). by Rainer Gawlick. Ph.D.

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Nandakumar, Ramnath. "Robust Control Design using Quantitative Feedback Theory." Thesis, City University London, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.514959.

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Wang, Hui. "Error equivalence theory for manufacturing process control." [Tampa, Fla.] : University of South Florida, 2007. http://purl.fcla.edu/usf/dc/et/SFE0002252.

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Hadjiyiannis, Michael Jason. "Decision under uncertainty : problems in control theory, robust optimization and game theory." Thesis, Imperial College London, 2013. http://hdl.handle.net/10044/1/24965.

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Decision making under uncertainty is a widely-studied area spanning a number of fields such as computational optimization, control theory, utility theory and game theory. A typical problem of decision making under uncertainty requires the design of an optimal decision rule, control policy, or behavioural function, that takes into account all available information regarding the uncertain parameters and returns the decision that is most suitable for the given objective. A popular requirement is to determine robust decisions that maintain certain desired characteristics despite the presence of uncertainty. In this thesis, we study three distinct problems that involve the design of robust decisions under different types of uncertainty. We investigate a dynamic multi-stage control problem with stochastic exogenous uncertainty, a dynamic two-stage robust optimization problem with epistemic exogenous uncertainty, and finally a game theoretic problem with both stochastic endogenous and epistemic exogenous uncertainty. Specifically, a) we develop an efficient algorithm that bounds the performance loss of affine policies operating in discrete-time, finite-horizon, stochastic systems with expected quadratic costs and mixed linear state and input constraints. Finding the optimal control policy for such problems is generally computationally intractable, but suboptimal policies can be computed by restricting the class of admissible policies to be affine on the observation. Our algorithm provides an estimate of the loss of optimality due to the use of such affine policies, and it is based on a novel dualization technique, where the dual variables are restricted to have an affine structure; b) we develop an efficient algorithm to bound the suboptimality of linear decision rules in two-stage dynamic linear robust optimization problems, where they have been shown to suffer a worst-case performance loss of the order $\Omega(\sqrt{m})$ for problems with $m$ linear constraints. Our algorithm is based on a scenario selection technique, where the original problem is evaluated only over a finite subset of the possible uncertain parameters. This set is constructed from the Lagrange multipliers associated with the computation of the linear adaptive decision rules. The resulting instance-wise bounds outperform known bounds, including the aforementioned worst-case bound, in the vast majority of problem instances; c) we develop an algorithm that enumerates all behavioural functions that are at equilibrium in a game where players face epistemic uncertainty regarding their opponent's utility functions. Traditionally, these games are solved as complete-information games where players are assumed to be risk-neutral, with a utility function that is positively affine in the monetary payoffs. We demonstrate that this assumption imposes severe limitations on the problem structure, and we propose that these games should be formulated as incomplete private information games where each player may have any increasing or increasing concave utility function. If the players are ambiguity-averse, then under these assumptions, they play either a pure strategy, a max-min strategy, or a convex combination of the two. By utilizing this result, we develop an algorithm that can enumerate all equilibria of the game.

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Simon, Daniel. "Fighter Aircraft Maneuver Limiting Using MPC : Theory and Application." Doctoral thesis, Linköpings universitet, Reglerteknik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-139945.

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Flight control design for modern fighter aircraft is a challenging task. Aircraft are dynamical systems, which naturally contain a variety of constraints and nonlinearities such as, e.g., maximum permissible load factor, angle of attack and control surface deflections. Taking these limitations into account in the design of control systems is becoming increasingly important as the performance and complexity of the aircraft is constantly increasing. The aeronautical industry has traditionally applied feedforward, anti-windup or similar techniques and different ad hoc engineering solutions to handle constraints on the aircraft. However these approaches often rely on engineering experience and insight rather than a theoretical foundation, and can often require a tremendous amount of time to tune. In this thesis we investigate model predictive control as an alternative design tool to handle the constraints that arises in the flight control design. We derive a simple reference tracking MPC algorithm for linear systems that build on the dual mode formulation with guaranteed stability and low complexity suitable for implementation in real time safety critical systems. To reduce the computational burden of nonlinear model predictive control we propose a method to handle the nonlinear constraints, using a set of dynamically generated local inner polytopic approximations. The main benefit of the proposed method is that while computationally cheap it still can guarantee recursive feasibility and convergence. An alternative to deriving MPC algorithms with guaranteed stability properties is to analyze the closed loop stability, post design. Here we focus on deriving a tool based on Mixed Integer Linear Programming for analysis of the closed loop stability and robust stability of linear systems controlled with MPC controllers. To test the performance of model predictive control for a real world example we design and implement a standard MPC controller in the development simulator for the JAS 39 Gripen aircraft at Saab Aeronautics. This part of the thesis focuses on practical and tuning aspects of designing MPC controllers for fighter aircraft. Finally we have compared the MPC design with an alternative approach to maneuver limiting using a command governor.

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Hu, Ai-Ping. "Nonlinear non-minimum phase output tracking via output redefinition and learning control." Diss., Georgia Institute of Technology, 2000. http://hdl.handle.net/1853/16644.

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Michalska, Hannah. "Design of nonlinear control systems : theory and algorithms." Thesis, Imperial College London, 1989. http://hdl.handle.net/10044/1/8179.

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Sanei, Ahmad. "Towards a performance theory of robust adaptive control." Thesis, University of Southampton, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.274043.

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Saunders, William R. "On the use of modern control theory for active structural acoustic control." Diss., This resource online, 1991. http://scholar.lib.vt.edu/theses/available/etd-07282008-134205/.

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Ng, Justin. "Artificial Neural Network-Based Robotic Control." DigitalCommons@CalPoly, 2018. https://digitalcommons.calpoly.edu/theses/1846.

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Artificial neural networks (ANNs) are highly-capable alternatives to traditional problem solving schemes due to their ability to solve non-linear systems with a nonalgorithmic approach. The applications of ANNs range from process control to pattern recognition and, with increasing importance, robotics. This paper demonstrates continuous control of a robot using the deep deterministic policy gradients (DDPG) algorithm, an actor-critic reinforcement learning strategy, originally conceived by Google DeepMind. After training, the robot performs controlled locomotion within an enclosed area. The paper also details the robot design process and explores the challenges of implementation in a real-time system.

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黃濤 and To Wong. "Some issues on robust control." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1997. http://hub.hku.hk/bib/B31220113.

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Wong, To. "Some issues on robust control /." Hong Kong : University of Hong Kong, 1997. http://sunzi.lib.hku.hk/hkuto/record.jsp?B19470435.

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Renfrew, David T. "TRAFFIC SIGNAL CONTROL WITH ANT COLONY OPTIMIZATION." DigitalCommons@CalPoly, 2009. https://digitalcommons.calpoly.edu/theses/190.

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Traffic signal control is an effective way to improve the efficiency of traffic networks and reduce users’ delays. Ant Colony Optimization (ACO) is a metaheuristic based on the behavior of ant colonies searching for food. ACO has successfully been used to solve many NP-hard combinatorial optimization problems and its stochastic and decentralized nature fits well with traffic flow networks. This thesis investigates the application of ACO to minimize user delay at traffic intersections. Computer simulation results show that this new approach outperforms conventional fully actuated control under the condition of high traffic demand.

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Theeranaew, Wanchat. "STUDY ON INFORMATION THEORY: CONNECTION TO CONTROL THEORY, APPROACH AND ANALYSIS FOR COMPUTATION." Case Western Reserve University School of Graduate Studies / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=case1416847576.

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Chepkwony, Isaac. "Analysis and control theory of some cochlear models." [Ames, Iowa : Iowa State University], 2006.

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Fukao, Takanori. "Studies on adaptive control theory and its applications." 京都大学 (Kyoto University), 2001. http://hdl.handle.net/2433/150622.

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Vogel, Katja. "Modeling driver behavior : a control theory based approach /." Linköping : Univ, 2002. http://www.bibl.liu.se/liupubl/disp/disp2002/tek751s.pdf.

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Won, Chin Chung. "Active control of smart structure : theory and experiment." Diss., Georgia Institute of Technology, 1990. http://hdl.handle.net/1853/12374.

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Shaikh, Mohammad Shahid. "Optimal control of hybrid systems : theory and algorithms." Thesis, McGill University, 2004. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=85095.

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Many complex systems are hybrid in the sense that: (i) the state set possesses continuous and discrete components, and (ii) system evolution may occur in both continuous and discrete time. One important class of hybrid systems is that characterized by a feedback configuration of a set of continuous controlled low level systems and a high level discrete controller; such systems appear frequently in engineering and are particularly evident when a system is required to operate in a number of distinct modes. Other classes of hybrid systems are found in such diverse areas as (i) air traffic management systems, (ii) chemical process control, (iii) automotive engine-transmission systems, and (iv) intelligent vehicle-highway systems. In this thesis we first formulate a class of hybrid optimal control problems (HOCPs) for systems with controlled and autonomous location transitions and then present necessary conditions for hybrid system trajectory optimality. These necessary conditions constitute generalizations of the standard Minimum Principle (MP) and are presented for the cases of open bounded control value sets and compact control value sets. These conditions give information about the behaviour of the Hamiltonian and the adjoint process at both autonomous and controlled switching times. Such proofs of the necessary conditions for hybrid systems optimality which can be found in the literature are sufficiently complex that they are difficult to verify and use; in contrast, the formulation of the HOCP given in Chapter 2 of this thesis, together with the use of (i) classical variational methods and more recent needle variation techniques, and (ii) a local controllability condition, called the small time tubular fountain (STTF) condition, make the proofs in that chapter comparatively accessible. We note that the STTF condition is used to establish the adjoint and Hamiltonian jump conditions in the autonomous switchings case. A hybrid Dynamic Programming Principle (HDPP) generalizing the standard dynamic programming principle to hybrid systems is also derived and this leads to hybrid Hamilton-Jacobi-Bellman (HJB) equation which is then used to establish a verification theorem within this framework. (Abstract shortened by UMI.)

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Dissertations / Theses on the topic 'Control theory'

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