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Dissertations / Theses on the topic 'Form controls'

Author: Grafiati
Published: 30 May 2022
Last updated: 31 July 2025

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1

Savanhu, G. M. (George Mutangamberi). "Controls on channel form and floodplain character along the Bulstrode River, southern Quebec, Canada." Thesis, McGill University, 1993. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=69683.

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The hydraulic dimensions and planform character of a river channel are very much affected by the channel gradient and the calibre of the bed materials. One of the two major objectives of this study is to analyze these effects on selected reaches along the Bulstrode River, near Victoriaville.<br>The second objective is to relate the variations in gradient, sediment calibre and channel geometry to the changes in floodplain character along the river valley.<br>The river is about 85 km long and flows across the Appalachian highlands and foothills in southern Quebec. This study focuses on six alluv
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2

Albhbah, Atia M. "Dynamic web forms development using RuleML. Building a framework using metadata driven rules to control Web forms generation and appearance." Thesis, University of Bradford, 2013. http://hdl.handle.net/10454/5719.

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Web forms development for Web based applications is often expensive, laborious, error-prone, time consuming and requires a lot of effort. Web forms are used by many different people with different backgrounds and a lot of demands. There is a very high cost associated with the need to update the Web application systems to achieve these demands. A wide range of techniques and ideas to automate the generation of Web forms exist. These techniques and ideas however, are not capable of generating the most dynamic behaviour of form elements, and make Insufficient use of database metadata to control
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3

Albhbah, Atia Mahmod. "Dynamic web forms development using RuleML : building a framework using metadata driven rules to control Web forms generation and appearance." Thesis, University of Bradford, 2013. http://hdl.handle.net/10454/5719.

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Web forms development for Web based applications is often expensive, laborious, error-prone, time consuming and requires a lot of effort. Web forms are used by many different people with different backgrounds and a lot of demands. There is a very high cost associated with the need to update the Web application systems to achieve these demands. A wide range of techniques and ideas to automate the generation of Web forms exist. These techniques and ideas however, are not capable of generating the most dynamic behaviour of form elements, and make Insufficient use of database metadata to control W
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4

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
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5

Agbi, Clarence. "Scalable and Robust Designs of Model - Based Control Strategies for Energy - Efficient Buildings." Research Showcase @ CMU, 2014. http://repository.cmu.edu/dissertations/333.

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In the wake of rising energy costs, there is a critical need for sustainable energy management of commercial and residential buildings. Buildings consume approximately 40% of total energy consumed in the US, and current methods to reduce this level of consumption include energy monitoring, smart sensing, and advanced integrated building control. However, the building industry has been slow to replace current PID and rule-based control strategies with more advanced strategies such as model-based building control. This is largely due to the additional cost of accurately modeling the dynamics of
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6

Polston, James D. "DECENTRALIZED ADAPTIVE CONTROL FOR UNCERTAIN LINEAR SYSTEMS: TECHNIQUES WITH LOCAL FULL-STATE FEEDBACK OR LOCAL RELATIVE-DEGREE-ONE OUTPUT FEEDBACK." UKnowledge, 2013. http://uknowledge.uky.edu/me_etds/24.

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This thesis presents decentralized model reference adaptive control techniques for systems with full-state feedback and systems with output feedback. The controllers are strictly decentralized, that is, each local controller uses feedback from only local subsystems and no information is shared between local controllers. The full-state feedback decentralized controller is effective for multi-input systems, where the dynamics matrix and control-input matrix are unknown. The decentralized controller achieves asymptotic stabilization and command following in the presence of sinusoidal disturbances
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7

SOUZA, Kamilla Moraes De. "Forma urbana e controle de uso e ocupação: Um estudo do impacto da legislação de uso e ocupação do solo na cidade do Recife." Universidade Federal de Pernambuco, 2016. https://repositorio.ufpe.br/handle/123456789/18036.

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Submitted by Irene Nascimento (irene.kessia@ufpe.br) on 2016-11-01T19:36:16Z No. of bitstreams: 2 license_rdf: 1232 bytes, checksum: 66e71c371cc565284e70f40736c94386 (MD5) Kamilla Moraes de Souza_MDU_2015_versão final.pdf: 7728760 bytes, checksum: 646ce9bfa054417c9e5b6bc266a1a849 (MD5)<br>Made available in DSpace on 2016-11-01T19:36:17Z (GMT). No. of bitstreams: 2 license_rdf: 1232 bytes, checksum: 66e71c371cc565284e70f40736c94386 (MD5) Kamilla Moraes de Souza_MDU_2015_versão final.pdf: 7728760 bytes, checksum: 646ce9bfa054417c9e5b6bc266a1a849 (MD5) Previous issue date: 2016-06-29<br>CAPES<b
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8

Janzon, Amelie, and Andreas Olsson. "Controlling For a Sustainable Future : The practical use of management control systems." Thesis, Uppsala universitet, Företagsekonomiska institutionen, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-324882.

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Sustainability is becoming increasingly more important for companies as the public demands that companies are more transparent and act in a responsible manner. This thesis researches what role management control systems play when implementing and working with sustainability. This was done by interviewing CSO’s and controllers as well as examining annual financial and sustainability reports at three large Swedish firms, all praised for their sustainability work. The data was compared between the case companies and analysed by using the management control systems framework by Malmi and Brown (20
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9

Burnett, Kent R. "A PROPOSED CONTROL SOLUTION FOR THE CAL POLY WIND ENERGY CAPTURE SYSTEM." DigitalCommons@CalPoly, 2012. https://digitalcommons.calpoly.edu/theses/779.

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The focus of this thesis is to research, analyze, and design a reliable and economical control system for the Cal Poly Wind Energy Capture System (WECS). A dynamic permanent magnet generator model is adopted from [1] and [2] and combined with an existing wind turbine model to create a non-linear time varying model in MATLAB. The model is then used to analyze potentially harmful electrical disturbances, and to define safe operating limits for the WECS. An optimal operating point controller utilizing a PID speed loop is designed with combined optimization criteria and the final controller des
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10

Abbaspour, Ali Reza. "Active Fault-Tolerant Control Design for Nonlinear Systems." FIU Digital Commons, 2018. https://digitalcommons.fiu.edu/etd/3917.

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Faults and failures in system components are the two main reasons for the instability and the degradation in control performance. In recent decades, fault-tolerant control (FTC) approaches were introduced to improve the resiliency of the control system against faults and failures. In general, FTC techniques are classified into two major groups: passive and active. Passive FTC systems do not rely on the fault information to control the system and are closely related to the robust control techniques while an active FTC system performs based on the information received from the fault detection an
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11

Kamaldar, Mohammadreza. "DISCRETE-TIME ADAPTIVE CONTROL ALGORITHMS FOR REJECTION OF SINUSOIDAL DISTURBANCES." UKnowledge, 2018. https://uknowledge.uky.edu/me_etds/129.

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We present new adaptive control algorithms that address the problem of rejecting sinusoids with known frequencies that act on an unknown asymptotically stable linear time-invariant system. To achieve asymptotic disturbance rejection, adaptive control algorithms of this dissertation rely on limited or no system model information. These algorithms are developed in discrete time, meaning that the control computations use sampled-data measurements. We demonstrate the effectiveness of algorithms via analysis, numerical simulations, and experimental testings. We also present extensions to these algo
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12

JÃnior, AntÃnio Barbosa de Souza. "Hybrid position controller for an field-oriented induction motor drive." Universidade Federal do CearÃ, 2014. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=13468.

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CoordenaÃÃo de AperfeÃoamento de Pessoal de NÃvel Superior<br>This work describes the study and implementation of a hybrid control technique applied to the positioning of the rotor shaft in a three-phase induction motor (IM). The machine has been modeled using the field oriented control (FOC) strategy. In additional, it is used three controllers to obtain the design of the position loop, each one with different operating characteristics. Initially, two constant gain controllers are associated with the position loop diagram in the FOC technique in order to obtain a fastest response, with distur
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13

Smith, David J. "An Advanced Controller for a Semi-Active Wheelchair Suspension." DigitalCommons@CalPoly, 2011. https://digitalcommons.calpoly.edu/theses/451.

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An Advanced Controller for a Semi-Active Wheelchair Suspension was designed, built and tested. The suspension consisted of a Goodyear 1S3-011 air spring, IQ Valves high speed proportional solenoid valve, and a custom made accumulator. Several controller designs specific to semi-active suspensions were designed and tested. The controllers investigated were skyhook, acceleration driven damping, and a combined control law employing both a dual and single sensor version. The implementation of skyhook control suffered performance degradation from the idealization due to particular elements of h
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14

Sereni, Bruno. "Static output feedback control for LPV and uncertain LTI systems /." Ilha Solteira, 2019. http://hdl.handle.net/11449/180732.

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Orientador: Edvaldo Assunção<br>Resumo: Este trabalho aborda o controle via realimentação estática de saída aplicado à sistemas lineares com parâmetro variante (LPV) e lineares incertos invariantes no tempo (LIT). O projeto de ganhos de realimentação estática de saída apresentado neste trabalho é baseado no método dos dois estágios, o qual consiste em primeiramente obter um ganho de realimentação de estados, e então, utilizar esta informação no segundo estágio para obter-se o ganho de realimentação estática de saída desejado. As soluções para os problemas investigados são apresentadas na forma
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15

Barbosa, Filipe Marques. "Robust recursive path-following control for autonomous heavy-duty vehicles." Universidade de São Paulo, 2018. http://www.teses.usp.br/teses/disponiveis/18/18153/tde-14032019-082753/.

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Path following and lateral stability are crucial issues for autonomous vehicles. Moreover, these problems increase in complexity when handling heavy-duty vehicles due to their poor manoeuvrability, large sizes and mass variation. In addition, uncertainties on mass may have the potential to significantly decrease the performance of the system, even to the point of destabilising it. These parametric variations must be taken into account during the design of the controller. However, robust control techniques usually require offline adjustment of auxiliary tuning parameters, which is not practical
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16

Yuan, Hongliang. "Control of NonH=holonomic Systems." Doctoral diss., University of Central Florida, 2009. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/2751.

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Many real-world electrical and mechanical systems have velocity-dependent constraints in their dynamic models. For example, car-like robots, unmanned aerial vehicles, autonomous underwater vehicles and hopping robots, etc. Most of these systems can be transformed into a chained form, which is considered as a canonical form of these nonholonomic systems. Hence, study of chained systems ensure their wide applicability. This thesis studied the problem of continuous feed-back control of the chained systems while pursuing inverse optimality and exponential convergence rates, as well as the feed-bac
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17

An, Vatana. "A THIRD-ORDER DIFFERENTIAL STEERING ROBOT AND TRAJECTORY GENERATION IN THE PRESENCE OF MOVING OBSTACLES." Master's thesis, University of Central Florida, 2006. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/2433.

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In this thesis, four robots will be used to implement a collision-free trajectory planning/replanning algorithm. The existence of a chained form transformation so that the robot's model can be control in canonical form will be analyzed and proved. A trajectory generation for obstacles avoidance will be derived, simulated, and implemented. A specific PC based control algorithm will be developed. Chapter two describes two wheels differential drive robot modeling and existence of controllable canonical chained form. Chapter 3 describes criterion for avoiding dynamic objects, a feasible collision-
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18

Al-Shantaf, Abdulraouf O. "A Computer-Based Process Control System for a Target Station in a LINAC Facility." Thesis, University of North Texas, 1999. https://digital.library.unt.edu/ark:/67531/metadc278077/.

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An event-driven, sequential, process control system was designed for International Isotopes, Inc., to automate and remotely control a target station at the company's linear accelerator facility. The designed system consisted of two major sections: a software program (virtual instrument), which was developed by LabVIEW, and a hardware interface (FieldPoint Modular Distributed I/O System by National Instrument), which had to be a pre-developed system that did not require customization. The designed virtual instrument was tested on a simulation model that mimed the target station. The result was
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19

Kim, Hyunyoung. "Conception centrée sur l'utilisateur des commandes de changement de forme." Thesis, Université Grenoble Alpes, 2020. http://www.theses.fr/2020GRALM001.

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Les interfaces à forme variable apportent de la flexibilité aux interfaces physiques en transformant les dispositifs de calcul en n'importe quelle forme ou matérialité. Les interfaces à forme variable seront de plus en plus accessibles aux utilisateurs finaux à l'avenir, de même que le développement technologique. Cependant, nous en savons peu sur les critères de conception des interfaces de changement de forme pour les utilisateurs finaux, en particulier pour ceux qui utilisent des interfaces de contrôle des paramètres. Les interfaces de contrôle des paramètres sont souvent conçues à partir d
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20

Ianagui, André Seiji Sandes. "Modelagem e controle de atuador antagônico de liga de memória de forma." Universidade de São Paulo, 2012. http://www.teses.usp.br/teses/disponiveis/3/3152/tde-15072013-164506/.

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Este trabalho apresenta a modelagem, identificação de parâmetros e projeto do sistema de controle de um atuador rotacional antagônico com refrigeração forçada baseado em fios de liga de memória de forma, tendo em vista a aplicação em manipuladores robóticos. O modelo é baseado na abordagem de transformação de fases por subcamadas, que leva em conta a alta não linearidade que ocorre devido à dinâmica de transformação de fases do fio de memória de forma (especialmente a alta histerese envolvida). Um algoritmo de otimização por meio de Programação Quadrática Sequencial é então usado para se estim
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21

Ferreira, Castellane Silva [UNESP]. "Sistema de gerenciamento automático de reatores eletrônicos com ajuste do nível de luminosidade para múltiplas lâmpadas fluorescentes." Universidade Estadual Paulista (UNESP), 2008. http://hdl.handle.net/11449/87118.

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Made available in DSpace on 2014-06-11T19:22:33Z (GMT). No. of bitstreams: 0 Previous issue date: 2008-10-14Bitstream added on 2014-06-13T20:27:55Z : No. of bitstreams: 1 ferreira_cs_me_ilha.pdf: 2485161 bytes, checksum: 08f725b1be1ea7769c8c4f79b5fa8d98 (MD5)<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)<br>Este trabalho trata do desenvolvimento e implementação de um sistema de iluminação fluorescente com gerenciamento automático baseado em reatores eletrônicos aplicados a múltiplas lâmpadas fluorescentes. O foco desta pesquisa é direcionado ao desenvolvimento de uma
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22

Liu, Chunyan. "Sample Size Analysis and Issues About No-Perfect Matched-Controls for Matched Case-Control Study." University of Cincinnati / OhioLINK, 2006. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1155578591.

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23

Heinen, Garrett David. "Modeling and Charging Control of a Lithium Ion Battery System for Solar Panels." DigitalCommons@CalPoly, 2017. https://digitalcommons.calpoly.edu/theses/1745.

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The advancement in solar panel and battery technology makes them useful for energy supply and storage. This thesis involves the modeling and charging control of a lithium ion battery system for solar panels. The proposed model is based on the parameters and characteristics of a realistic battery and solar panel system; and the hybrid control approach combines the advantages of the adaptive incremental conductance method and the perturb and observe method to track the maximum power point of the solar panel for charging the battery unit. Computer simulation results demonstrate that this proposed
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24

Lindberg, Andreas, and August Groth. "Intuitive haptic controls for an RC foam airplane." Thesis, KTH, Maskinkonstruktion (Inst.), 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-226645.

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In this century robotics and control systems are progressively advancing at a faster and faster pace. Interesting topics in these advancements are how to make controls easier to understand and how to implement a faster learning curve for the user. In this project our goal was to create an intuitive haptic controlled RC plane using an Arduino. This was accomplished by using a glove with a gyroscope to measure the tilt of the hand and then using this information to e_ectively steer the planes aileron angels and ultimately control the planes direction without it being too hard to maneuver. To con
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25

Chen, Yahao. "Geometric analysis of differential-algebraic equations and control systems : linear, nonlinear and linearizable." Thesis, Normandie, 2019. http://www.theses.fr/2019NORMIR04.

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Dans la première partie de cette thèse, nous étudions les équations différentielles algébriques (en abrégé EDA) linéaires et les systèmes de contrôles linéaires associés (en abrégé SCEDA). Les problèmes traités et les résultats obtenus sont résumés comme suit : 1. Relations géométriques entre les EDA linéaires et les systèmes de contrôles génériques SCEDO. Nous introduisons une méthode, appelée explicitation, pour associer un SCEDO à n'importe quel EDA linéaire. L'explicitation d'une EDA est une classe des SCEDO, précisément un SCEDO défini, à un changement de coordonnées près, une transformat
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26

Bevacqua, Timothy R. "Advanced Flight Control Issues for Reusable Launch Vehicles." Ohio University / OhioLINK, 2004. http://www.ohiolink.edu/etd/view.cgi?ohiou1097601560.

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27

Bertilson, Anton. "The quality of quality controls. A study of the controlls for certifying building according to Miljöbyggnad." Thesis, Linköpings universitet, Medie- och Informationsteknik, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-108357.

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Miljöbyggnadscertifieringarna har ökat markant sen systemet lanserades och allt fler byggnader uppförs i Sverige idag med stort miljöfokus. Men hur bra är kvalitetskontrollerna som ska säkerställa att byggnaden uppfyller certifieringskraven? Denna rapport syftar att svara på hur noggrant kvalitetskontrollerna för certifiering av Miljöbyggnad utförs samt hur bra dessa kontroller är på att säkerställa certifieringen ur ett kvalitetsperspektiv. För att svara på syftet så undersöks och kartläggs det vilka kvalitetskontroller som gjorts på referensobjektet framtidens US i Linköping. Efter att kvali
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28

Rowland, Duncan Andrew. "Computer graphic control over human face and head appearance : genetic optimisation of perceptual characteristics." Thesis, University of St Andrews, 1998. http://hdl.handle.net/10023/14585.

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The aims of this thesis are two-fold. The first is to develop computer graphics that allow quantitative manipulation of complex visual stimuli. The second is to show that such techniques have utility in the domain of perceptual psychology. There are three main sections to this thesis. The first section creates methods for performing transformations of facial appearance along particular perceptual dimensions. This work begins with 2-D image manipulations and then extends the general principles to 3-D. Effectiveness of the techniques is illustrated with plates showing transformation in age, gend
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Gurusubramanian, Sabarish. "A comprehensive process for Automotive Model-Based Control." The Ohio State University, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=osu1374078953.

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Lyrio, Lucas Nogueira Santos. "As ações para o controle das infecções hospitalares em Aracaju: resultados de um inquérito da Vigilância Sanitária Municipal." Instituto de Saúde Coletiva, 2012. http://repositorio.ufba.br/ri/handle/ri/16227.

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Harber, John A. "A dual hoist robot crane for large area sensing." Thesis, Georgia Institute of Technology, 2016. http://hdl.handle.net/1853/55035.

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Cranes are used to lift and move large objects in a wide variety of applications at constructions sites, shipping ports, and manufacturing facilities, etc. If the load to be moved is too long or heavy for a single crane, then two, or more, cranes must work in cooperation to move the payload. In a factory setting this can be accomplished using two trolleys running along the same bridge forming a dual hoist crane. Using two hoists not only increases lifting capacity, it also improves stability of the payload over traditional single hoist configurations. This research takes advantage of that incr
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Trindade, Anderson Laécio Galindo. "Contribuições para o controle on-line de processos por atributos." Universidade de São Paulo, 2008. http://www.teses.usp.br/teses/disponiveis/3/3136/tde-02062008-132508/.

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O procedimento de controle on-line de processos por atributos, proposto por Taguchi et al. (1989), consiste em amostrar um item a cada m produzidos e decidir, a cada inspeção, se houve ou não aumento na fração de itens não-conformes produzidos. Caso o item inspecionado seja não-conforme, pára-se o processo para ajuste supondo-se que tenha ocorrido uma mudança para a condição fora de controle. Como i) o sistema de inspeção pode estar sujeito a erros de classificação e o item inspecionado ser submetido à classificações repetidas; ii) a fração de itens não-conformes no estado fora de controle pod
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Martins, Daniel J?nior. "Aspectos biol?gicos do parasitoide Palmistichus elaeisis (Hymenoptera: Eulophidae) em diferentes hospedeiros." UFVJM, 2016. http://acervo.ufvjm.edu.br/jspui/handle/1/1434.

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?rea de concentra??o: Silvicultura e manejo florestal.<br>Submitted by Jos? Henrique Henrique (jose.neves@ufvjm.edu.br) on 2017-08-09T23:04:22Z No. of bitstreams: 2 daniel_junior_martins.pdf: 1407857 bytes, checksum: 35837ffe0a3033cb340c421e657b405d (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5)<br>Approved for entry into archive by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2017-08-14T16:36:33Z (GMT) No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) daniel_junior_martins.pdf: 1407857 bytes, checksum: 35837ff
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Souza, Rafael Sanchez. "Design and prototyping of a development platform for exoskeleton research." Universidade de São Paulo, 2017. http://www.teses.usp.br/teses/disponiveis/3/3152/tde-26022018-141504/.

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Human machine interface has been a growing field of scientific research for the last years. Conventional robots have been conceived as rigid metallic structures and, when metal meets human tissue, it is necessary to break the mindset in order to achieve better interaction. Exoskeletons, often called wearable robots, shares the same challenges with applications ranging from industry, to military, medicine and entertainment. This work introduces a systematic design of a development platform for exoskeleton research supported by Requirement Engineering and implemented through prototyping. The dyn
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Ferreira, Castellane Silva. "Sistema de gerenciamento automático de reatores eletrônicos com ajuste do nível de luminosidade para múltiplas lâmpadas fluorescentes /." Ilha Solteira : [s.n.], 2008. http://hdl.handle.net/11449/87118.

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Resumo: Este trabalho trata do desenvolvimento e implementação de um sistema de iluminação fluorescente com gerenciamento automático baseado em reatores eletrônicos aplicados a múltiplas lâmpadas fluorescentes. O foco desta pesquisa é direcionado ao desenvolvimento de uma plataforma automática de gerenciamento e supervisão, propiciando o controle de luminosidade, acionamento remoto e também acionamentos programáveis de acordo com o expediente de trabalho do local e condições de iluminação natural do ambiente, além de prover aumento de vida útil das lâmpadas fluorescentes, em função de protocol
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Mullen, Jon. "FILTERED-DYNAMIC-INVERSION CONTROL FOR FIXED-WING UNMANNED AERIAL SYSTEMS." UKnowledge, 2014. http://uknowledge.uky.edu/me_etds/45.

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Instrumented umanned aerial vehicles represent a new way of measuring turbulence in the atmospheric boundary layer. However, autonomous measurements require control methods with disturbance-rejection and altitude command-following capabilities. Filtered dynamic inversion is a control method with desirable disturbance-rejection and command-following properties, and this controller requires limited model information. We implement filtered dynamic inversion as the pitch controller in an altitude-hold autopilot. We design and numerically simulate the continuous-time and discrete-time filtered-dyna
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37

Almajali, Mohammad Rajab. "ENGINEERED CARBON FOAM FOR TEMPERATURE CONTROL APPLICATIONS." University of Dayton / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1271365522.

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38

Meslard, Jean-Claude. "Immobilisation temporaire de medicaments par des liaisons hydrolysables sur des polymeres biocompatibles : application a l'ophtalmologie." Paris 6, 1988. http://www.theses.fr/1988PA066417.

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L'objectif est l'immobilisation reversible de medicaments (chloramphenicol, indometacine) au sein de lentilles de contact hydrophiles permettant une liberation lente et continue lors de leur adaptation sur des yeux malades
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39

Kissai, Moad. "Optimal Coordination of Chassis Systems for Vehicle Motion Control." Thesis, Université Paris-Saclay (ComUE), 2019. http://www.theses.fr/2019SACLY004/document.

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Le contrôle global du châssis a fait récemment l'objet d'une attention particulière. Cela serait motivé surtout par l’approche des véhicules entièrement autonomes. Ces véhicules, en particulier le niveau 5 d’automatisation SAE (J3016), devraient remplacer le conducteur humain dans presque toutes les situations. Le véhicule automatisé devrait être capable de gérer en harmonie des situations couplées où sont intégrés le contrôle longitudinal, latéral et éventuellement vertical. Pour ce faire, le véhicule dispose de plusieurs systèmes intégrés par axe de contrôle. En effet, les équipementiers aut
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40

Genari, Helói Francico Gentil. "Damage-Tolerant Modal Control Methods for Flexible Structures." Thesis, Paris, ENSAM, 2016. http://www.theses.fr/2016ENAM0032/document.

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Les structures intelligentes sont de plus en plus présentes dans différentes industries et notamment dans les domaines de l'aéronautique et du génie civil. Ces structures sont dotées de fonctions qui leur permettent d'interagir avec leur environnement, d'adapter leurs caractéristiques structurelles (raideur, amortissement, viscosité, etc.) selon les besoins ou de surveiller leur état de santé ou « SHM » (Structural Health Monitoring). Aujourd’hui, les performances des méthodes de contrôle actif peuvent être considérablement dégradées lors de l’apparition d’endommagement. Le contrôle actif tolé
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41

Niel, Fabien. "Modélisation et contrôle d'une aile en présence d'oscillations aéroélastiques de grande amplitude et à faible nombre de Reynolds." Thesis, Toulouse, ISAE, 2018. http://www.theses.fr/2018ESAE0003/document.

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L’objectif de cette thèse est de fournir une approche générale permettant d’aborder les problèmes de contrôle aéroélastique.Tout d’abord, un modèle d’aile oscillante est développé afin de rendre compte des phénomènes d’hystérésis des charges aérodynamiques et de décrochage dynamique qui peut être observé, particulièrement à fort angles d’attaque ou à faible nombre de Reynolds. Le modèle est alors entraîné et comparé avec succès aux résultats expérimentaux obtenus pour une aile NACA 0018. Ce modèle, comme de nombreux modèles aérodynamiques, souffre d’une complexité inhérente et de non-linéarité
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42

Liu, Xiao. "Power control of single-stage PV inverter for distribution system volt-var optimization." UKnowledge, 2013. http://uknowledge.uky.edu/ece_etds/36.

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The output power variability of intermittent renewable sources can cause significant fluctuations in distribution system voltages. A local linear controller that exploits the capability of a photovoltaic inverter to provide both real and reactive power is described. This controller substitutes reactive power for real power when fluctuations in the output of the photovoltaic source are experienced. In this way, the inverter can help mitigate distribution system voltage fluctuations. In order to provide real and reactive to the grid, a three-phase grid-connected single-stage photovoltaic system
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43

Gentry-Grace, Cassandra Ann. "A Study of Smart Foam for Noise Control Applications." Diss., Virginia Tech, 1998. http://hdl.handle.net/10919/40091.

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Smart foam is a composite noise control treatment that consists of a distributed piezoelectric actuator, known as polyvinylidene fluoride (PVDF), embedded within a layer of partially-reticulated polyurethane foam. The principal function of smart foam is to yield broadband sound attenuation. Passive acoustic foams are a very reliable high-frequency sound reduction method. With regard to smart foam, the embedded piezoelectric actuator is introduced to overcome the limitations of the passive foam in the low-frequency region. The piezoelectric actuator excites the structural and acoustic phases of
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44

Dal, col Laura. "On distributed control analysis and design for Multi-Agent systems subject to limited information." Thesis, Toulouse, INSA, 2016. http://www.theses.fr/2016ISAT0034/document.

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Les systèmes multi-agents sont des systèmes dynamiques composés par plusieurs éléments qui interagissent entre eux. Ces éléments sont appelés agents. Un agent est un système dynamique caractérisé par deux propriétés. La première est que les agents sont autonomes— c’est-à-dire qu’ils ne sont pas dirigés par l’environnement extérieur et ils peuvent évoluer selon un comportement auto-organisé. La seconde est que les agents sont capables de communiquer entre eux pour accomplir des tâches complexes, telles que la coopération, la coordination et la résolution de conflits. L’un des problèmes courants
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45

Seminario, Reategui Renzo Andre. "Control of an over-actuated nanopositioning system by means of control allocation." Master's thesis, Pontificia Universidad Católica del Perú, 2020. http://hdl.handle.net/20.500.12404/18659.

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This Master’s Thesis is devoted to the analysis and design of a control structure for the nanopositioning system LAU based on the dynamic control allocation technique. The objective is to control the vertical displacement with nanometer precision under a control effort distribution criterion among the actuator set. In this case, the pneumatic actuator is used as a passive gravity compensator while the voice coil motor generates the transient forces. The analysis of the system characteristics allows defining the design criterion for the control allocation. In this direction, the proposed
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46

Addo, Douglas Kweku. "OPERATION AND PROCESS CONTROL DEVELOPMENT FOR A PILOT-SCALE LEACHING AND SOLVENT EXTRACTION CIRCUIT RECOVERING RARE EARTH ELEMENTS FROM COAL-BASED SOURCES." UKnowledge, 2019. https://uknowledge.uky.edu/mng_etds/50.

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The US Department of Energy in 2010 has identified several rare earth elements as critical materials to enable clean technologies. As part of ongoing research in REEs (rare earth elements) recovery from coal sources, the University of Kentucky has designed, developed and is demonstrating a ¼ ton/hour pilot-scale processing plant to produce high-grade REEs from coal sources. Due to the need to control critical variables (e.g. pH, tank level, etc.), process control is required. To ensure adequate process control, a study was conducted on leaching and solvent extraction control to evaluate the po
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47

Yang, Yugu. "Feedback Control for Electron Beam Lithography." UKnowledge, 2012. http://uknowledge.uky.edu/ece_etds/9.

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Scanning-electron-beam lithography (SEBL) is the primary technology to generate arbitrary features at the nano-scale. However, pattern placement accuracy still remains poor compared to its resolution due to the open-loop nature of SEBL systems. Vibration, stray electromagnetic fields, deflection distortion and hysteresis, substrate charging, and other factors prevent the electron-beam from reaching its target position and one has no way to determine the actual beam position during patterning with conventional systems. To improve the pattern placement accuracy, spatial-phase-locked electron-bea
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48

PICCOLI, FLAVIO. "Visual Anomaly Detection For Automatic Quality Control." Doctoral thesis, Università degli Studi di Milano-Bicocca, 2019. http://hdl.handle.net/10281/241219.

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Il controllo di qualità automatico nei processi di produzione è uno degli elementi chiave della quarta rivoluzione industriale che porterà alla creazione della cosiddetta industria 4.0. In questo contesto, un elemento fondamentale è il rilievo di difetti, anomalie o guasti del prodotto in tempo compatibile con quello di produzione. Questa tesi si focalizza esattamente su questo tema: il rilevamento delle anomalie per il controllo automatico di qualità, attraverso l'analisi di immagini raffiguranti il prodotto sotto ispezione. Questa analisi verrà fatta tramite l'utilizzo di tecniche di machine
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49

Silva, Renan Venancio da. "Potential use of edaphic predatory mites for the control of hematophagous mites (Acari)." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/11/11146/tde-15042016-181233/.

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A major concern in animal production is the occurrence of hematophagous organisms, as ticks and poultry mites. The control of these organisms is usually done with chemicals. However, this technique is being discouraged in several countries. An alternative measure is biological control. It is known that most mites of the cohort Gamasina (order Mesostigmata) are predators and their diversity and prevalence in places where ticks and poultry mites cause problems are poorly understood. One of the first recommended steps in a biological control program is to determine the fauna where the pest organi
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50

Gasik, Kevin Richard. "COMPARISON OF LQR AND LQR-MRAC FOR LINEAR TRACTOR-TRAILER MODEL." DigitalCommons@CalPoly, 2019. https://digitalcommons.calpoly.edu/theses/2117.

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The United States trucking industry is immense. Employing over three million drivers and traveling to every city in the country. Semi-Trucks travel millions of miles each week and encompass roads that civilians travel on. These vehicles should be safe and allow efficient travel for all. Autonomous vehicles have been discussed in controls for many decades. Now fleets of autonomous vehicles are beginning their integration into society. The ability to create an autonomous system requires domain and system specific knowledge. Approaches to implement a fully autonomous vehicle have been developed u
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