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Dissertations / Theses on the topic 'Control loop'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Elfving, Maria. "Hydraulic closed loop control." Thesis, KTH, Skolan för elektroteknik och datavetenskap (EECS), 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-234932.

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The purpose of the thesis work is to investigate methods for closedloop control of hydraulic pressure in transmissions to make them bemore precise. This is desirable since it decreases the fuel consumptionas well as emissions, and improves the driving performance.To be able to study the behaviour of the transmission, a Simulink modelis designed with the parts relevant to the problem, and from this a linearmodel is obtained. Three different controllers are designed andimplemented in the Simulink model, to compare and analyze differentsolutions. The controllers implemented are a PI controller, a

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2

Vanichsriratana, Wirat. "Optimal control of fed-batch fermentation processes." Thesis, University of Westminster, 1996. https://westminsterresearch.westminster.ac.uk/item/94908/optimal-control-of-fed-batch-fermentation-processes.

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Optimisation of a fed-batch fermentation process typically uses the calculus of variations or Pontryagin's maximum principle to determine an optimal feed rate profile. This often results in a singular control problem and an open loop control structure. The singular feed rate is the optimal feed rate during the singular control period and is used to control the substrate concentration in the fermenter at an optimal level. This approach is supported by biological knowledge that biochemical reaction rates are controlled by the environmental conditions in the fermenter; in this case, the substrate

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3

Jones, Melvin. "Closed loop performance monitoring." Pretoria : [s.n.], 2005. http://upetd.up.ac.za/thesis/available/etd-04122007-115205.

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4

Mantzaridis, Haralmbos. "Closed-loop control of anaesthesia." Thesis, University of Strathclyde, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.338938.

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5

Norfleet, Walton A. (Walton Arthur) 1973. "Algorithms for closed loop shape control." Thesis, Massachusetts Institute of Technology, 2001. http://hdl.handle.net/1721.1/8559.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2001.<br>Includes bibliographical references (p. 147-149).<br>The stretch forming process is used to make structural sheet metal parts in the aerospace industry. The development of stretch forming tools has long been plagued by significant challenges. First, the low production volumes within the aerospace industry and the large numbers of stretch formed parts make the process capital intensive. Second, the development of stretch forming tooling has long been more of an art than a science. This results in poo

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6

Nalla, Ajit R. "Closed-loop flow control approaches for VARTM." Access to citation, abstract and download form provided by ProQuest Information and Learning Company; downloadable PDF file 2.86 Mb., 89 p, 2006. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pqdiss&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&rft_dat=xri:pqdiss:1430781.

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7

Corke, Peter Ian. "High-Performance Visual Closed-Loop Robot Control." Connect to thesis, 1994. http://repository.unimelb.edu.au/10187/1392.

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This thesis addresses the use of monocular eye-in-hand machine vision to control the position of a robot manipulator for dynamically challenging tasks. Such tasks are defined as those where the robot motion required approaches or exceeds the performance limits stated by the manufacturer.<br>Computer vision systems have been used for robot control for over two decades now, but have rarely been used for high-performance visual closed-loop control. This has largely been due to technological limitations in image processing, but since the mid 1980sadvances have made it feasible to apply computer vi

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8

Ettaleb, Lahoucine. "Control loop performance assessment and oscillation detection." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape8/PQDD_0017/NQ46341.pdf.

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9

Bao, Lei. "Source-channel coding for closed-loop control." Licentiate thesis, Stockholm, Communication Theory Lab, School of Electrical Engineering, Royal Institute of Technology, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3980.

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10

Chen, Jun. "Control system based loop and process monitoring." Thesis, University of Glasgow, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.312530.

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11

Wilhelms, John, and Marcus Trulsson. "Open Loop Control of Piezoelectric Cantilever Speaker." Thesis, Linköpings universitet, Reglerteknik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-122363.

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Actuating a cantilever piezoelectric element over a frequency spectrum, the movement will show resonances and hysteresis behavior not present in the input signal. Excursion modeling and open loop control of a cantilever piezoelectric bimorph actuator was studied in this thesis, with the aim to enhance the actuator's movement to more accurately render audible input. This actuator has lower energy consumption and presents new possibilities for speaker design in constrained situations compared to conventional micro speaker technology. Much work has previously been done to model piezoelectric cant

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12

Wenzel, Brian Jeffrey. "CLOSED-LOOP ELECTRICAL CONTROL OF URINARY CONTINENCE." Case Western Reserve University School of Graduate Studies / OhioLINK, 2005. http://rave.ohiolink.edu/etdc/view?acc_num=case1120932206.

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13

Shaw, Feng-Rong. "Repetitive control of closed loop material testing /." The Ohio State University, 1991. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487757723996636.

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14

Whiting, Ian Martin. "Closed loop digital control of electrohydraulic systems." Thesis, University of Bath, 1987. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.375516.

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15

Ambike, Ajit Dilip. "Closed-loop real-time control on distributed networks." Thesis, Texas A&M University, 2004. http://hdl.handle.net/1969.1/1079.

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This thesis is an eﬀort to develop closed-loop control strategies on computer networks and study their stability in the presence of network delays and packet losses. An algorithm using predictors was designed to ensure the system stability in presence of network delays and packet losses. A single actuator magnetic ball levitation system was used as a test bed to validate the proposed algorithm. A brief study of real-time requirements of the networked control system is presented and a client-server architecture is developed using real-time operating environment to implement the proposed algorit

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16

Al, Soraihi Ghassan, and ghassan soraihi@aramco com. "Control loop performance monitoring in an industrial setting." RMIT University. Electrical and Computer Engineering, 2007. http://adt.lib.rmit.edu.au/adt/public/adt-VIT20080108.125446.

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The wide range of applications for single input single output controllers have encouraged interest in monitoring their performance. Over the past two decades researchers in the area have found many performance enhancement opportunities by applying these techniques. These are most evident in large operational plants with hundreds of controllers being monitored at the same time. Early performance measures were based on minimum variance control as a benchmark for controller performance. Many other procedures have since emerged that have improved the level of accuracy in these performance me

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17

Johansson, Henrik. "Gain Scheduled Missile Control Using Robust Loop Shaping." Thesis, Linköping University, Department of Electrical Engineering, 2002. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-1529.

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<p>Robust control design has become a major research area during the last twenty years and there are nowadays several robust design methods available. One example of such a method is the robust loop shaping method that was developed by K. Glover and D. C. MacFarlane in the late 1980s. The idea of this method is to use decentralized controller design to give the singular values of the loop gain a desired shape. This step is called Loop Shaping and it is followed by a Robust Stabilization procedure, which aims to give the closed loop system a maximum degree of stability margins. In this thesis,

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18

Pothier, Raymond Peter. "Closed-loop temperature control of friction stir welding." Thesis, Nelson Mandela Metropolitan University, 2015. http://hdl.handle.net/10948/10362.

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This study develops and presents a friction stir weld (FSW) quality assurance tool based on control of weld zone temperature. Apart from correct tool geometry, tool tilt angle, traverse speed and forge force during welding, one important requirement is that the weld material be sufficiently plasticised (softened). The level of plasticisation is related to weld zone temperature which is primarily dependent on spindle speed, traverse speed and forge force. When all other conditions are correct, sufficiently plasticised material flows around and consolidates behind the tool without the production

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19

Huang, Biao. "Multivariate statistical methods for control loop performance assessment." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/nq21580.pdf.

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20

Zhang, Zhenyu. "Closed-Loop Flow Control for Boundary Layer Instabilities." Thesis, Queen Mary, University of London, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.504556.

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Since O. Reynolds' experiment revealed the transition from laminar state to turbulence in pipe flow (1883), numerous efforts had been exerted in order to understand the mechanism. Linear hydrodynamic stability theory was established in the first half ofthe twentieth century. This theory predicts the growth of small disturbances during the initial stage of transition. As an important achievement, the Tollmien-Schlichting (T-S) instability, which represents the initial evolution of disturbances in two dimensional shear flows, has been described and verified in boundary layer experiments. Once th

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21

Wiese, Daniel Philip. "Systematic adaptive control design using sequential loop closure." Thesis, Massachusetts Institute of Technology, 2016. http://hdl.handle.net/1721.1/104197.

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Thesis: Ph. D., Massachusetts Institute of Technology, Department of Mechanical Engineering, 2016.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 211-219).<br>This thesis presents a new, systematic method of synthesizing an output feedback adaptive controller for a class of uncertain, non-square multi-input/multi-output systems. The control design process consists of first designing an inner-loop controller for a reduced order plant model to enforce command tracking of selected inner-loop variables, with an adaptive element used to accommodate parametric

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22

Palliyaguru, Lalinda Niroshana. "Investigation of Closed-Loop Control of Polyatomic Molecules." Diss., Temple University Libraries, 2008. http://cdm16002.contentdm.oclc.org/cdm/ref/collection/p245801coll10/id/16646.

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Chemistry<br>Ph.D.<br>ABSTRACT Investigation of Closed-Loop Control of Polyatomic Molecules Lalinda N. Palliyaguru Doctor of Philosophy Temple University, 2009 Doctoral Advisory Committee Chair: Prof. Robert J. Levis Experimental results that are based on mass spectral data, in this thesis includes ionization/fragmentation of DMMP and CH2BrI in strong femtosecond laser fields, coherent control using closed-loop optimization method for bond dissociation in both DMMP and CH2BrI, as well as application of closed-loop control as a detection method for air borne organophosphates such as DMMP. Inves

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23

Hardwicke, K. R. "A SELF TUNING PHASE-LOCKED LOOP." International Foundation for Telemetering, 1992. http://hdl.handle.net/10150/608941.

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International Telemetering Conference Proceedings / October 26-29, 1992 / Town and Country Hotel and Convention Center, San Diego, California<br>The uncertainty in the gain of voltage controlled crystal oscillators (VCXOs) used in the implementation of certain analog phase-locked loops (PLLs) suggests some form of automatic tuning algorithm, both for pretuning and during operation. This paper proposes an adaptive PLL (APLL) algorithm to fill this need for PLLs used in the recovery of tones in noise. This algorithm makes use of a resonant error algorithm to remove the effects of VCXO noise

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24

Inyiama, Fidelis Chidozie. "Active control of hydrodynamic slug flow." Thesis, Cranfield University, 2013. http://dspace.lib.cranfield.ac.uk/handle/1826/7996.

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Multiphase flow is associated with concurrent flow of more than one phase (gas-liquid, liquid-solid, or gas-liquid-solid) in a conduit. The simultaneous flow of these phases in a flow line, may initiate a slug flow in the pipeline. Hydrodynamic slug flow is an alternate or irregular flow with surges of liquid slug and gas pocket. This occurs when the velocity difference between the gas flow rate and liquid flow rate is high enough resulting in an unstable hydrodynamic behaviour usually caused by the Kelvin-Helmholtz instability. Active feedback control technology, though found effective for th

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25

Aude, E. P. L. "Closed-loop identification procedures and aspects of self-tuning control." Thesis, University of Manchester, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.377482.

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26

Papageorgiou, George. "Robust control system design : H∞ loop sharing and aerospace applications." Thesis, University of Cambridge, 1998. https://www.repository.cam.ac.uk/handle/1810/272494.

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27

Guidi, Hernan. "Open and closed-loop model identification and validation." Pretoria : [s.n.], 2009. http://upetd.up.ac.za/thesis/available/etd-07032009-170311/.

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28

Clarkson, P. J. "Modelling and control of stepping motor systems." Thesis, University of Cambridge, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.384410.

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29

Greenwood, David. "Benchmarking and advanced control for hot strip finishing mills." Thesis, University of Strathclyde, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.275182.

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30

Rasman, Brandon Gerald. "Sensorimotor loop delays in the control of human stance." Thesis, University of British Columbia, 2016. http://hdl.handle.net/2429/59843.

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Maintaining upright stance involves a time-critical process in which the central nervous system monitors postural orientation and modulates muscle activity accordingly. Visual, vestibular and somatosensory systems detect body motion that the balance controller utilizes to update standing control. The time delays between motor output and the resulting sensory feedback are expected and likely accommodated for. Consequently, we perceive whole-body movement as being a consequence of our own actions. Balance control, however, also involves processes that do not rely on conscious perception, allowin

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31

Hodge, Steven Eric. "Discrete-time closed-loop control of a hinged wavemaker." Thesis, University of British Columbia, 1986. http://hdl.handle.net/2429/26704.

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The waves produced by a flap-type wavemaker, hinged in the middle, are modelled using first-order linear wavemaker theory. A simplified closed-loop, discrete-time system is proposed. This includes a proportional plus integral plus derivative (PID) controller, and the wavemaker in order to compare the actual wave spectral density with the desired wave spectral density at a single frequency. Conventional discrete-time control theory is used with the major difference being the use of a relatively long timestep duration between changes in waveboard motion. The system response is calculated for m

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32

Pereira, E. "Adaptive closed-loop control of arterial pressure during anaesthesia." Thesis, University of Bristol, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.379565.

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33

Fenn, Ralph Christian. "Closed-loop control of forming stability during metal stamping." Thesis, Massachusetts Institute of Technology, 1989. http://hdl.handle.net/1721.1/13966.

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34

Lee, Daniel C. (Daniel Chonghwan). "On open-loop admission control into a queueing system." Thesis, Massachusetts Institute of Technology, 1992. http://hdl.handle.net/1721.1/12776.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1992.<br>Includes bibliographical references (leaves 156-159).<br>by Daniel Chonghwan Lee.<br>Ph.D.

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35

Bakkestuen, Robert S. (Robert Scott). "Closed loop control of forming stability during aluminum stamping." Thesis, Massachusetts Institute of Technology, 1994. http://hdl.handle.net/1721.1/12048.

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36

Tate, Allan Robert. "Closed loop force control for a robotic grinding system." Thesis, Massachusetts Institute of Technology, 1986. http://hdl.handle.net/1721.1/15031.

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Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1986.<br>MICROFICHE COPY AVAILABLE IN ARCHIVES AND ENGINEERING<br>Bibliography: leaves 175-179.<br>by Allan Robert Tate.<br>M.S.

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37

Lopes, Rafael Anderson Martins. "Aircraft identification applied to closed loop control system design." Instituto Tecnológico de Aeronáutica, 2006. http://www.bd.bibl.ita.br/tde_busca/arquivo.php?codArquivo=904.

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In the present work, the influence of maneuver design for stability derivatives of aerodynamic forces and moments identification in the performance of closed loop control systems is evaluated, where two maneuvers largely used in aeronautical industry - doublet and 3211 - are compared to a maneuver of restricted use in aeronautical industry, but already well known in identification - the PRBS. This evaluation is divided in two steps: in the first, it is performed the identification with each of the maneuvers and then a crosschecking of the obtained models, computing the mean quadratic predictio

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38

Harris, Jr Frederick Bernard. "GNSS Hardware-In-The-Loop Formation and Tracking Control." Thesis, Virginia Tech, 2006. http://hdl.handle.net/10919/71380.

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Formation and tracking control are critical for of today's vehicle applications in and this will be true for future vehicle technologies as well. Although the general function of these controls is for data collection and military applications, formation and tracking control may be applied to automobiles, drones, submarines, and spacecraft. The primary application here is the investigation of formation keeping and tracking solutions for realistic, real-time, and multi-vehicle simulations. This research explores the creation of a predictive navigation and control algorithm for formation keeping

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39

Lee, Seong-Rae. "Self-tuning control application to closed loop material testing /." The Ohio State University, 1989. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487598748019076.

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40

Harris, Frederick Bernard Jr. "GNSS Hardware-In-The-Loop Formation and Tracking Control." Thesis, Virginia Tech, 2016. http://hdl.handle.net/10919/71380.

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Formation and tracking control are critical for of today's vehicle applications in and this will be true for future vehicle technologies as well. Although the general function of these controls is for data collection and military applications, formation and tracking control may be applied to automobiles, drones, submarines, and spacecraft. The primary application here is the investigation of formation keeping and tracking solutions for realistic, real-time, and multi-vehicle simulations. This research explores the creation of a predictive navigation and control algorithm for formation keeping

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41

Valle-Cervantes, Sergio. "Plant-wide monitoring of processes under closed-loop control." Access restricted to users with UT Austin EID Full text (PDF) from UMI/Dissertation Abstracts International, 2001. http://wwwlib.umi.com/cr/utexas/fullcit?p3035991.

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42

Osinuga, Mobolaji. "Weight optimization in H∞ loop-shaping control and applications." Thesis, University of Manchester, 2012. https://www.research.manchester.ac.uk/portal/en/theses/weight-optimization-in-hinfinity-loopshaping-control-and-applications(58102c35-9a75-44af-9879-4f142ca4aa09).html.

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The primary objective of this thesis is to leverage on the framework of H∞ loop-shaping control to formulate efficient and powerful optimization algorithms in LMI framework for the synthesis of performance loop-shaping weights. The H∞ loop-shaping design procedure is an efficient controller synthesis technique that combines classical loop-shaping concepts with H∞ synthesis. This procedure establishes a good tradeoff between robust stability and robust performance of a closed-loop system in a systematic manner. However, the selection of pre- and/or post-compensators, a crucial step in the desig

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43

Sadati, Seyed Hossein. "Closed loop control of guided missiles using neural networks." Diss., The University of Arizona, 1993. http://hdl.handle.net/10150/186531.

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An optimal guidance law for a missile flight is one which determines appropriate controls to produce a flight path such that some mission objective will be achieved in the most efficient manner. Optimal Control Theory is often used to accomplish this task. One must bear in mind, however, that the usefulness of optimal control is sharply divided between two distinct classes of dynamical systems, namely, linear systems and nonlinear systems. For linear systems, the theory is complete in the sense that given a quadratic cost, a closed-loop feedback guidance law may be determined. For nonlinear sy

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44

Jenne, Theresa Clara. "Closed-loop control of roll bending/twisting : a shape control system for beams." Thesis, Massachusetts Institute of Technology, 1986. http://hdl.handle.net/1721.1/35334.

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Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1986.<br>MICROFICHE COPY AVAILABLE IN ARCHIVES AND ENGINEERING<br>Bibliography: leaves 150-152.<br>by Theresa Clara Jenne.<br>M.S.

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45

Luo, F. L. "Digital control of power semiconductor converters." Thesis, University of Cambridge, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.383314.

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46

Farenzena, Marcelo. "Novel methodologies for assessment and diagnostics in control loop management." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2008. http://hdl.handle.net/10183/13943.

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Na literatura há vários trabalhos elucidando a importância de ferramentas para auditar malhas de controle. Na indústria, o interesse por esse tipo de software é crescente, devido ao benefício trazido: garantir o exato desempenho para cada controlador significa atingir pontos de operação mais lucrativos. Todavia, as metodologias disponíveis na literatura e nas ferramentas comerciais não provêm medidas conclusivas das características da malha. Conseqüentemente, a análise muitas vezes é confusa e difícil, acarretando um diagnóstico difícil. Reduzir a distância entre a auditoria e o diagnóstico, p

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47

Wiltse, John Michael. "Control of mixing in a nonreactive plane shear layer: I. Open-loop control. II. Feedback control." Diss., The University of Arizona, 1993. http://hdl.handle.net/10150/186580.

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A control system for the enhancement and regulation of mixing in a nonreactive plane shear layer has been developed in a two-stream closed-return water facility. Mixing of a passive scalar is estimated using a thermal analog in which the two streams have uniform, steady temperatures differing by 3°C. The position of the temperature interface between the two streams is measured in the plane of its cross stream Schlieren image by an optical sensor which is placed upstream of the rollup of the primary vortices. Control is effected via an array of surface heaters flush-mounted on the flow partitio

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48

Skillsäter, Calle. "Evaluation and Configuration of a Control Loop Asset Monitoring Tool." Thesis, Linköpings universitet, Reglerteknik, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-67855.

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In this thesis, an automatic control performance monitoring tool is analyzed and evaluated. The tool is called Control Loop Asset Monitor (CLAM) and is a part of the Asset Optimization extension to the ABB platform System 800xA. CLAM calculates and combines a number of performance indices into diagnoses. The functionality, choice of configuration parameters and the quality of the result from CLAM have been analyzed using data from the pulp mill Södra Cell Mörrum. In order to get reliable diagnoses from CLAM, it is important that it is correctly configured. It was found that some of the default

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49

Chipalkatty, Rahul. "Human-in-the-loop control for cooperative human-robot tasks." Diss., Georgia Institute of Technology, 2012. http://hdl.handle.net/1853/43649.

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Even with the advance of autonomous robotics and automation, many automated tasks still require human intervention or guidance to mediate uncertainties in the environment or to execute the complexities of a task that autonomous robots are not yet equipped to handle. As such, robot controllers are needed that utilize the strengths of both autonomous agents, adept at handling lower level control tasks, and humans, superior at handling higher-level cognitive tasks. To address this need, we develop a control theoretic framework that seeks to incorporate user commands such that user intention i

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50

BOSSIO, CARLOS ERNESTO HILBURG. "MINIMAL TIME LOOP CONTROL OF A PERMANENT MAGNET STEP MOTOR WITH THE USE OS AN INNER LOOP." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 1986. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=9618@1.

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COORDENAÇÃO DE APERFEIÇOAMENTO DO PESSOAL DE ENSINO SUPERIOR<br>Descreve-se o controle em malha fechada por malha pequena de um motor de passo de imã permanente (MIPIP), de forma a obter posicionamento preciso em tempo mínimo. A malha pequena é utilizada para, aplicar o modo de controle de alta velocidade (HISPEED); consegue-se dessa forma atingir velocidades muito superiores às obtidas em malha aberta. O principio de controle adotado pelo controlador de malha externa baseia-se na utilização de tabelas que possuam dados sobre as curvas de aceleração e desaceleração do MPIP. Dependendo

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