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Van, Heerden Eugene. "Integrated simulation of building thermal performance, HVAC system and control." Thesis, University of Pretoria, 1997. http://hdl.handle.net/2263/37304.
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Practicing engineers need an integrated building, HVAC and control simulation tool for optimum
HVAC design and retrofit. Various tools are available to the researchers, but these are not appropriate
for the consulting engineer. To provide the engineer with a tool which can be used for
typical HVAC projects, new models for building, HVAC and control simulation are introduced and
integrated in a user-friendly, quick-to-use tool.
The new thermal model for buildings is based on a transfer matrix description of the heat transfer
through the building shell. It makes provision for the various heat flow paths that make up the
overall heat flow through the building structure.
The model has been extensively verified with one hundred and three case studies. These case
studies were conducted on a variety of buildings, ranging from a 4m2 bathroom, to a 7755 m2
factory building. Eight of the case studies were conducted independently in the Negev Desert in
Israel.
The thermal model is also used in a program that was custom-made for the AGREMENT Board
(certification board for the thermal performance of new low-cost housing projects). Extensions to
the standard tool were introduced to predict the potential for condensation on the various surfaces.
Standard user patterns were incorporated in the program so that all the buildings are evaluated on
the same basis.
In the second part of this study the implementation of integrated simulation is discussed. A solution
algorithm, based on the Tarjan depth first-search algorithm, was implemented. This ensures
that the minimum number of variables are identified. A quasi-Newton solution algorithm is used
to solve the resultant simultaneous equations.
Various extensions to the HVAC and control models and simulation originally suggested by Rousseau
[1] were implemented. Firstly, the steady-state models were extended by using a simplified
time-constant approach to emulate the dynamic response of the equipment. Secondly, a C02 model
for the building zone was implemented. Thirdly, the partload performance of particular equipment
was implemented.
Further extensions to the simulation tool were implemented so that energy management strategies
could be simulated. A detailed discussion of the implications of the energy management systems
was given and the benefits of using these strategies were clearly illustrated, in this study.
Finally, the simulation tool was verified by three case studies. The buildings used for the verification
ranged from a five-storeyed office and laboratory building, to a domestic dwelling. The energy
consumption and the dynamics of the HVAC systems could be predicted sufficiently accurately to
warrant the use of the tool for future building retrofit studiesThesis (PhD)--University of Pretoria, 1997.
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Mechanical and Aeronautical Engineering
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Pham, Nga D. "Weapons control re-entry simulation enhancement." Master's thesis, This resource online, 1996. http://scholar.lib.vt.edu/theses/available/etd-02022010-020315/.
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M, Venkata Raghu Chaitanya. "Model Based Aircraft Control System Design and Simulation." Thesis, Linköping University, Linköping University, Department of Management and Engineering, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-19264.
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Development of modern aircraft has become more and more expensive and time consuming. In order to minimize the development cost, an improvement of the conceptual design phase is needed. The desired goal of the project is to enhance the functionality of an in house produced framework conducted at the department of machine design, consisting of parametric models representing a large variety of aircraft concepts.
The first part of the work consists of the construction of geometric aircraft control surfaces such as flaps, aileron, rudder and elevator parametrically in CATIA V5.
The second part of the work involves designing and simulating an Inverse dynamic model in Dymola software.
An Excel interface has been developed between CATIA and Dymola. Parameters can be varied in the interface as per user specification; these values are sent to CATIA or Dymola and vice versa. The constructed concept model of control surfaces has been tested for different aircraft shapes and layout. The simulation has been done in Dymola for the control surfaces.
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Skjong, Stian. "Modeling, Simulation and Control of Hydraulic Winch System." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for marin teknikk, 2014. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-25578.
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In this thesis a hydraulic low pressure winch system has been modeled using bond graph theory. The hydraulic winch system is assumed to be installed on an offshore vessel affected by environmental forces and disturbances such as waves and currents. The hydraulic system powering the winch consists mainly of two pilot operated 3/3-directional valves controlled by two 4/3-directional valves and a hydraulic motor. The system also includes a pressure relief valve, check valves, pump systems, piping and filters. The 3/3-directional valves are the main focus in the model and are therefore modeled with less simplifications compared to the other subsystems. A thorough model study has been initiated to figure out the model limitations, sensitivity of model parameters and the ability to simplify the derived model without loosing essential dynamics and characteristics. The effects of variable bulk modulus and fluid inertia in the 3/3-directional valves have been studied by comparing different step responses and motor load characteristics. The observations and results from this model analysis laid the groundwork for control of the hydraulic motor. A clear relation between the main valve displacements and the motor velocity and torque in 4/3 valve configuration gave reasons to believe that manual motor control done by the winch operator through control of the valve displacements was possible. Adaptive PID controllers were used as inner controllers to control the control slides in the main valves. These controllers were later on replaced with PD-controllers when outer control was derived because the adaptive controllers tended to be a bit slow. Simplified state equations describing the motor dynamics were derived for control design purposes. The state equations extracted from the bond graph model showed high complexity, containing logic and discrete quantities, and were not suitable for control design. Model based speed- and torque controllers, based on sliding mode and backstepping control theory, were derived based on the simplified equations and implemented in the model. Different load cases were initiated to test the two controllers. A lumped wire-load model containing hydrodynamics, wire- and reel dynamics and environmental disturbances such as current and heave motions of the vessel were added in the total winch model to test the controllers in different operations with varying conditions and environments. The results from these controller tests gave reason to believe that a combination of these two controllers would be favourable in certain operations and would give increased safety in extreme cases such as stuck load and loss of load. The derived speed and torque controller were put into a hybrid controller framework and a switching algorithm was designed with focus on switching stability and wanted functionalities for the winch system. It was observed that switching stability and winch functionality were closely connected and different winch operations were essential in the design of the switching algorithm. Dwell time and tracking error switching were used as the main controller switching restrictions together with functionality based switching conditions. Different simulations were initiated to test the hybrid controller such as stuck load, loss of load and landing of a load at the sea floor. A Luenberger observer was derived to estimate the motor load and the motor velocity by using the simplified state equations and the differential pressure across the hydraulic motor as measurement in order to ensure redundancy in the control system and be able to control the hydraulic winch even though the decoder measuring the hydraulic motor velocity fails.
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Gao, Jianmin. "Control and simulation of an active suspension system." Thesis, University of Wolverhampton, 1997. http://hdl.handle.net/2436/97364.
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Aslin, P. P. "Aircraft simulation and robust flight control system design." Thesis, University of York, 1985. http://etheses.whiterose.ac.uk/9821/.
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Mohamad, Mohamad Kheir. "Control System of Building using Modelling and Simulation." Doctoral thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2014. http://www.nusl.cz/ntk/nusl-234236.
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Udržovaní vnitřních klimatických podmínek tak, aby byly v souladu s tepelným komfortem lidí, je klíčovou otázkou pro řízení systémů vytápění, větrání a klimatizace (HVAC systémy). Počítačové modelování nabízí virtuální prostředí pro simulaci vnitřních i vnějších podmínek a s jeho pomocí je možné navrhnout řešení pro řízení technických zařízení budov. Tento proces vyžaduje pochopení těchto prostředí z fyzikálního a matematického hlediska tak, aby bylo možné fyzikální procesy daných prostředí prezentovat pomocí vztahů a rovnic odrážejících jejích různé parametry. Simulační proces dále nabízí možnost popsat interakci mezi těmito modely a jejich chování v čase, dává výchozí reprezentace těchto prostředí, a umožňuje pochopení jejich chování před přenosem těchto modelů do reálných aplikací. Simulace umožnuje respektovat, a ovlivňovat jejích chování přes kontrolu navržených modelů. MATLAB/SIMULINK software má pokročilé schopnosti pro simulace systémů HVAC, a to vytvořením širokého pracovního prostředí pro designéry v závislosti na vývoji matematických modelů a jejích simulace pomocí SIMULINK, aby výsledky mohly být slučitelné s požadovanými výstupy. Tato dizertační práce se zaměřuje na proces modelování vnitřního prostředí v budovách, aby bylo možné pochopit chování klíčových parametrů, které mají vliv na tepelnou pohodu obyvatel či uživatelů, matematické modely vnitřního prostředí posluchárny byly navržené speciálně pro tři základní parametry: koncentrace oxidu uhličitého, teplota vzduchu a relativní vlhkost. Změny chování těchto parametrů v průběhu času jsou simulovány a poté strategie kontroly návrhu těchto parametrů může je udržet ve vhodných rozmezích komfortních pro obyvatele či uživatele, i když změny venkovního klimatu, tepelné a hmotnostní zatíží interiér. Pomocí matematických metod, některé optimalizační metody byly navrženy za účelem snížení spotřeby energie bez vlivu na mezní hodnoty těchto parametrů. Proces validace modelu se provádí porovnáním výsledků s reálnými výstupy monitoringu Honeywell Enterprise Buildings Integrator systémem (EBI) nainstalován v areálu univerzity.
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Furmanik, Olga, and Alireza Famili. "Control system integration in ADAMS : With emphasis on hauler Automatic Traction Control system." Thesis, Linnéuniversitetet, Institutionen för maskinteknik (MT), 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-45957.
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The thesis investigates control system integration in ADAMS and the thesis presents appropriate knowledge related to the topic as multi body system, acting forces between road and wheels, equation of motion regarding to the haulers, traction control system and differential locks. The emphasis of the thesis is to implement and test the automatic traction control (ATC) for the hauler into ADAMS and Simulink models. The ATC models are based on certain requirements provided by Volvo Construction Equipment. As expected, results indicate that the ATC model operates during simulation for various road conditions. Nevertheless, the ATC model includes a few defects which are observed in results. The significant achievement of the thesis is a great collaboration between ADAMS and Simulink model.
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Li, Faming. "Economic resource allocation in system simulation and control design." Connect to a 24 p. preview or request complete full text in PDF format. Access restricted to UC campuses, 2006. http://wwwlib.umi.com/cr/ucsd/fullcit?p3208009.
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Thesis (Ph. D.)--University of California, San Diego, 2006.Title from first page of PDF file (viewed May 18, 2006). Available via ProQuest Digital Dissertations. Vita. Includes bibliographical references (p. 127-131).
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Eklund, John M. "Aircraft flight control simulation using parallel cascade system identification." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape17/PQDD_0004/MQ28194.pdf.
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Boner, Kevin Eugene 1961. "Command control system modeling for evaluating readiness." Thesis, The University of Arizona, 1988. http://hdl.handle.net/10150/276835.
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The objective of this research was to develop a framework whereby the United States Naval Surface Forces could be provided with better information to determine their overall readiness capability. This study utilized the new Readiness Assessment and Reporting Standard (S9410-AN-STD-010/AEGIS) as a guide. Also, a System Design Methodology was used as a tool to develop mathematical models for generating the readiness capability for a particular system. The specific system selected for demonstrating this framework was the Gun Weapon System (GWS) being developed for the Arleigh Burke DDG-51 Class Destroyer.
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Cuneo, David J. (David Joseph) 1972. "A system-wide evaluation of a traffic control system using microscopic simulation." Thesis, Massachusetts Institute of Technology, 1998. http://hdl.handle.net/1721.1/10104.
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Sheng, Li. "THE INTERACTIVE HARDWARE-IN-LOOP SIMULATION SYSTEM FOR TRAFFIC CONTROL SYSTEM DEVELOPMENT." University of Akron / OhioLINK, 2005. http://rave.ohiolink.edu/etdc/view?acc_num=akron1132429944.
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Abdulkareem, Alaa Adnan. "Modelling, simulation and control of a PTC machine hall." Thesis, University West, Department of Technology, Mathematics and Computer Science, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:hv:diva-1347.
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In this master thesis a flexible manufacturing system for a PTC machine hall has been modelled and simulated using RobCad. This system includes several equipments and machines which have been modelled and arranged to come up with three possible layouts. The machine hall in UW will be moved to a new place in Innovatum (a research area in Trollhättan). The machines were chosen from the existing machine hall according to UW requirements in order not to buy new machines because of economic reasons. The number of cells was also set by UW. The machines and equipments that will be moved are; two CNC machines, three ABB robots, a 4-axis gantry robot which transport the materials between the cells and a conveyor or a flex link which has been proposed in this project for the loading/unloading station use. The purposes of moving the machine hall to Innovatum are: - More people will be able to use the machine hall (i.e. UW, other schools and costumers from other companies for training purposes). - The environment will be more available to do more production operations using the robots and machines. - It will be a good opportunity to develop the programs and software, for that will let UW be able to hire a whole automation package to the costumers. - Students will be nearby to the industries'9 environment and may have more contact with different companies. - Since the new machine hall will attract costumers it will gain incomes to UW. Three layouts have been proposed in this thesis work, and these layouts fulfil all or most of the requirements of the costumers and users.
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Ford, Keith John. "The modelling and control of a synergistic motion system." Thesis, University of Brighton, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.337849.
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Chenine, Moustafa. "Wide area monitoring and control systems application communication requirements and simulation /." Licentiate thesis, Stockholm : Skolan för elektro- och systemteknik, Kungliga Tekniska högskolan, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-11316.
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Krishnappa, Arvind R. "Simulation study of a kanban controlled production system." Morgantown, W. Va. : [West Virginia University Libraries], 1999. http://etd.wvu.edu/templates/showETD.cfm?recnum=526.
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Thesis (M.S.)--West Virginia University, 1999.Title from document title page. Document formatted into pages; contains x, 156 p. : ill. Vita. Includes abstract. Includes bibliographical references (p. 100-106).
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Schuetze, Manfred Richard. "Integrated simulation and optimum control of the urban wastewater system." Thesis, Imperial College London, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.266011.
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Andersson, Dorothea. "Simulation of industrial control system field devices for cyber security." Thesis, KTH, Elkraftteknik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-202405.
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Industrial Control Systems (ICS) are an integral part of modernsociety, not least when it comes to controlling and protecting criticalinfrastructure such as power grids and water supply. There is a need to testthese systems for vulnerabilities, but it is often difficult if not impossible to doso in operational real time systems since they have been shown to be sensitiveeven to disturbances caused by benign diagnostic tools. This thesis exploreshow ICS field devices can be simulated in order to fool potential antagonists,and how they can be used in virtualized ICS for cyber security research. 8different field devices were simulated using the honeypot daemon Honeyd,and a generally applicable simulation methodology was developed. It was alsoexplored how these simulations can be further developed in order to functionlike real field devices in virtualized environments.Industriella informations- och styrsystem utgör en viktig delav vårt moderna samhälle, inte minst när det gäller kontroll och skydd avkritisk infrastruktur som elnät och vattenförsörjning. Det finns stora behov avatt säkerhetstesta dessa typer av system, vilket ofta är omöjligt iproduktionsmiljöer med realtidskrav som är erkänt känsliga för störningar, tilloch med från vanligt förekommande analysverktyg. Denna rapport presenterarhur vanliga komponenter i industriella informations- och styrsystem kansimuleras för att lura potentiella antagonister, och hur de kan användas ivirtualiserade styrsystem för cybersäkerhetsforskning. 8 olika komponentersimulerades med hjälp av Honeyd, och en generellt applicerbarsimuleringsmetodik utvecklades. Hur dessa simuleringar kan vidareutvecklasför att fungera som riktiga styrsystemskomponenter i virtualiserade miljöer harockså undersökts.
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Djabeng, Emmanuel N. "Modeling, Simulation and Implementation of a Fractional-Order Control System." University of Akron / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=akron1406115795.
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Godfrey, Simon. "Honeywell Experion System: Configuration, simulation and process control software interoperability." Thesis, Godfrey, Simon (2016) Honeywell Experion System: Configuration, simulation and process control software interoperability. Honours thesis, Murdoch University, 2016. https://researchrepository.murdoch.edu.au/id/eprint/35817/.
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The use of automated distributed control systems has become a widely discussed topic as industry attempts to maximise efficiency. An increase in automation technology has resulted in demand for “industry ready” graduate engineers with knowledge and experience with such technologies. Murdoch University (Murdoch) provides students with exposure to industry standard automation systems such as Honeywell’s Experion Process Knowledge System (PKS), a Distributed Control System (DCS) designed for the control and optimisation of industrial plants.
Presently, Murdoch uses Experion to monitor and control its pilot plant, exposing instrumentation and control students to the configuration and control of an industrial plant. Additionally, Murdoch holds a second Experion simulation license providing the ability to program and simulate process and control strategies. This project scope was to explore several key areas of the Experion simulation system followed by the development of a series of learning materials to facilitate the teaching of the Experion system to students for a new unit to be introduced at Murdoch University in 2017.
The methodology adopted to achieve the project outcome involved developing a comprehensive understanding of Experion and its associated applications, before building a series of example simulation programs for the purpose of implementing and testing a variety of Experion’s control strategies. Additionally, real-time control of the Experion simulation programs, using third party process control software, was achieved. The successful interoperability of MATLAB, Simulink, and LabVIEW with Experion provides an avenue for implementing advanced control strategies both in simulation and on Murdoch’s pilot plant.
At the conclusion of the project, an extensive list of learning materials was produced, providing comprehensive procedures to enact tasks within the Experion system. This includes initial setup and configuration, development of simulated programs and associated Human Machine Interface (HMI) displays, the implementation of control strategies, and third party process control software interoperability. These learning materials provide students with an enhanced learning experience, giving them the skills and exposure required to thrive in the automation engineering industry as a Murdoch University graduate.
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Mahajan, Rahul. "Cross-Layer Optimization: System Design and Simulation Methodologies." Thesis, Virginia Tech, 2003. http://hdl.handle.net/10919/35920.
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An important aspect of wireless networks is their dynamic behavior. The conventional protocol stack is inflexible as various protocol layers communicate in a strict manner. In such a case the layers are designed to operate under the worst conditions as opposed to adapting to changing conditions. This leads to inefficient use of spectrum and energy. Adaptation represents the ability of network protocols and applications to observe and respond to channel conditions.
Traditional simulation methodologies independently model the physical and higher layers. When multiple layer simulations are required, an abstraction of one layer is inserted into the other to provide the multiple layer simulation. However, recent advances in wireless communication technologies, such as adaptive modulation and adaptive antenna algorithms, demand a cross layer perspective to this problem in order to provide a sufficient level of fidelity. However, a full simulation of both layers often results in excessively burdensome simulation run-times. The benefits and possible parametric characterization issues arising due to the cross-layer integration of lower physical and higher network layers are investigated in this thesis. The primary objective of investigating cross-layer simulation techniques is to increase the fidelity of cross-layer network simulations while minimizing the simulation runtime penalties.
As a study of cross-layer system design a medium access control (MAC) scheme is studied for a MANET wherein the nodes are equipped with smart antennas. Traditional MAC protocols assume the use of omnidirectional antennas. Nodes with directional antennas are capable of transmitting in certain directions only and significantly reduce the chances of collision and increase the effective network capacity. MANETs using omni-directional antennas severely limit system performance as the entire space around a node up to its radio range is seen as a single logical channel. In this research a MAC protocol is studied that exploits space division multiple access at the physical layer. This is a strong example where physical and MAC design must be carried out simultaneously for adequate system performance.
Power control is a very important in the design of cellular CDMA systems which suffer from the near-far problem. Finally, the interaction between successive interference cancellation (SIC) receivers at the physical layer and power control, which is a layer 2 radio resource management issue, is studied. Traffic for future wireless networks is expected to be a mix of real-time traffic such as voice, multimedia teleconferencing, and games and data traffic such as web browsing, messaging, etc. All these applications will require very diverse quality of service guarantees. A power control algorithm is studied, which drives the average received powers to those required, based on the QoS requirements of the individual users for a cellular CDMA system using SIC receivers.Master of Science
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Kirby, Hugh Christopher. "The optimisation of Daimlerchrysler's SAP-MRP system through systems analysis, design, and simulation." Thesis, Stellenbosch : University of Stellenbosch, 2004. http://hdl.handle.net/10019.1/16364.
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Thesis (MSc)--University of Stellenbosch, 2004.ENGLISH ABSTRACT: This report presents the findings of a study that started as an evaluation of the possible implementation of the Options Inventory Management Model (OIMM), developed by van Wijck and Bekker [4], at DaimlerChrysler South Africa (DCSA). The OIMM System was developed as a possible alternative to the SAP-MRP System to ensure a high Customer Service Level, with the lowest possible inventory level, under the 10 Day Option Freeze Environment. DCSA indicated that although the OIMM System may be an ideal solution, in terms of optimising Plant Inventory levels whilst maximising Customer Service Levels, the practical problems associated with the possible implementation of this system would outweigh the associated benefits. This being the case, a directive was given to investigate the SAP-MRP System’s ability to provide a high Customer Service Level under the 10 Day Option Freeze Environment and not to pursue the OIMM implementation option. The objectives of this directive were to evaluate and establish the performance capabilities of the SAPMRP System under the 10 Day Option Freeze Environment as well as develop a system to aid in the customisation of the system. Design of Experiments (DOE) was utilised to plan the evaluation procedure and to ensure that a consistent approach was followed. The DOE generated huge amounts of output data that represented the Usage Category Behaviour Characteristics of the SAP-MRP System. Regression Analysis was utilised to investigate this data. A part-by-part analysis was avoided and the analysis approach followed presented results that could be applied to almost the entire range of parts, excluding bulk parts, at DCSA. The results showed that Coverage Profile alone could be used as a proactive inventory management tool to ensure maximum Customer Service Level. The Regression Analysis revealed that various combinations of Safety Time, Minimum, and Target Coverage resulted in similar or equal Avg. Plant Inventories, Avg. Number of Orders, and Avg. Order Sizes. These findings were used to develop a Decision Support Tool that could be used by DCSA when evaluating the resultant changes caused by the proposed changes in the aforementioned Input Parameters.
AFRIKAANSE OPSOMMING: Hierdie verslag stel die bevindinge van ‘n studie voor wat begin het met die evaluering van die moontlike implementering van die “Options Inventory Management Model” (OIMM), ontwikkel vir DaimlerChrysler (DCSA) deur van Wijck en Bekker [4]. Die OIMM sisteem was ontwikkel as ‘n moontlike alternatief vir die SAP-MRP sisteem om ‘n hoë verbruikersdiensvlak tesame met die laagste moontlike voorraadvlak in ‘n 10-dag opsie-vries omgewing te verseker. DCSA het aangedui dat, hoewel die OIMM sisteem ‘n ideale oplossing bleik te wees in terme van die optimisering van fabriek-voorraadvlakke tesame met die verbruikersdiensvlakke, die praktiese probleme wat met die moontlike implimentering daarvan geassosieer word, die geassosieerde voordele oorskry. Daar is dus opdrag gegee om die SAP-MRP sisteem se vermoë om hoë verbruikersdiensvlakke in die 10-dag opsie-vries omgewing te lewer te ondersoek en sodoende nie die implimentering van die OIMM sisteem te vervolg nie. Die doelwitte van hierdie opdrag was die evaluering en vestiging van die prestasievermoëns van die SAP-MRP sisteem in die 10-dag opsie-vries omgewing, asook om ‘n sisteem te ontwikkel wat as hulpmiddel kan dien in die geïndividualiseerde aanpassingsoptimisering daarvan. ‘n Eksperimentele Ontwerp (DOE) is gebruik in die beplanning van die evalueringsprosedure en ook om te verseker dat ‘n konstante benadering gevolg is. Die DOE het ‘n groot hoeveelheid uitsetdata genereer wat die prestasie van die SAP-MRP sisteem se gedragseienskappe voorgestel het. Regressie-analise is uitgevoer om die data te ondersoek. Onderdeel-by-onderdeel analise is vermy en die analise-benadering wat gevolg is het resultate gelewer wat toegepas kon word vir omtrent die hele reeks onderdele by DCSA, uitsluitende onderdele wat in grootmaat aangekoop word. Die resultate het gewys dat die “Coverage Profile” alleen gebruik kan word as ‘n pro-aktiewe voorraadbestuur hulpmiddel om maksimum verbruikersdiensvlakke te verseker. Die regressie-analise het getoon dat verskeie kombinasies van “Safety Time,” “Minimum” en “Target Coverage” gelei het tot dieselfde hoeveelheid fabrieks-voorraad, bestellingsvrystellings en bestellingsgroottes. Hierdie tendense is toegepas in die ontwikkeling van ‘n ondersteunende besluitnemingshulpmiddel wat deur DCSA gebruik sou kon word in die evaluering van die veranderinge wat onstaan vanweë die voorgestelde verandering in die voorafgenoemde insetparameters.
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Burger, Michael [Verfasser]. "Optimal Control of Dynamical Systems: Calculating Input Data for Multibody System Simulation / Michael Burger." München : Verlag Dr. Hut, 2011. http://d-nb.info/1018982701/34.
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Muir, L. J. "Simulation and control system design for a liquefied natural gas vaporiser." Thesis, University of Strathclyde, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.381717.
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Serdar, Usenmez. "Design Of An Integrated Hardware-in-the-loop Simulation System." Master's thesis, METU, 2010. http://etd.lib.metu.edu.tr/upload/2/12612051/index.pdf.
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This thesis aims to propose multiple methods for performing a hardware-in-the-loop simulation, providing the hardware and software tools necessary for design and execution. For this purpose, methods of modeling commonly encountered dynamical system components are explored and techniques suitable for calculating the states of the modeled system are presented. Modules and subsystems that enable the realization of a hardware-in-the-loop simulation application and its interfacing with external controller hardware are explained. The thesis also presents three different simulation scenarios. Solutions suitable for these scenarios are provided along with their implementations. The details and specifications of the developed software packages and hardware platforms are given. The provided results illustrate the advantages and disadvantages of the approaches used in these solutions.
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Wu, Tahchang Jimmy. "Simulation and analysis of the control system of the hybrid vehicle." Ohio : Ohio University, 1989. http://www.ohiolink.edu/etd/view.cgi?ohiou1182180337.
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Wu, Wenzhi (Winston). "An Internet-coupled Real—Time Air Monitoring System." Thesis, The University of Sydney, 2005. https://hdl.handle.net/2123/28172.
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This thesis describes an industrial odour monitoring system to monitor environmental odours from a meat processing plant. The author designed and implemented the monitoring hardware and a data network logging system which operated on site for three to four months. The performance of this system proves that the e-nose designed for this project is robust in industrial conditions and will provide a low-cost and adequately sensitive system that can run in real-time, and thereby meet the need for industry to comply with the growing demands by regulatory bodies for clean environmental air.
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Wong, Wing-ki Vicky, and 黃穎琪. "An immunity-based distributed multiagent control framework." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2006. http://hub.hku.hk/bib/B37314348.
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Foisy, Daniel G. "Specification and design of a high speed simulation and control system." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape4/PQDD_0019/MQ53431.pdf.
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Lu, Linghai. "Inverse modelling and inverse simulation for system engineering and control applications." Thesis, University of Glasgow, 2007. http://theses.gla.ac.uk/2/.
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Following extensive development over the past two decades, techniques of inverse simulation have led to a range of successful applications, mainly in the fields of helicopter flight mechanics, aircraft handling qualities and associated issues in terms of model validation. However, the available methods still have some well-known limitations. The traditional methods based on the Newton-Raphson algorithm suffer from numerical problems such as high-frequency oscillations and can have limitations in their applicability due to problems of input-output redundancy. The existing approaches may also show a phenomenon which has been termed “constraint oscillations” which leads to low-frequency oscillatory behaviour in the inverse solutions. Moreover, the need for derivative information may limit their applicability for situations involving manoeuvre discontinuities, model discontinuities or input constraints. Two new methods are developed to overcome these issues. The first one, based on sensitivity-analysis theory, allows the Jacobian matrix to be calculated by solving a sensitivity equation and also overcomes problems of input-output redundancy. In addition, it can improve the accuracy of results compared with conventional methods and can deal with the problem of high-frequency oscillations to some extent. The second one, based on a constrained Nelder-Mead search-based optimisation algorithm, is completely derivative-free algorithm for inverse simulation. This approach eliminates problems which make traditional inverse simulation techniques difficult to apply in control applications involving discontinuous issues such as actuator amplitude or rate limits. This thesis also offers new insight into the relationship between mathematically based techniques of model inversion and the inverse simulation approach. The similarities and shortcomings of both these methodologies are explored. The findings point to the possibility that inverse simulation can be used successfully within the control system design process for feedforward controllers for model-based output-tracking control system structures. This avoids the more complicated and relatively tedious techniques of model inversion which have been used in the past for feedforward controller design. The methods of inverse simulation presented in this thesis have been applied to a number of problems which are concerned mainly with helicopter and ship control problems and include cases involving systems having nonminimum-phase characteristics. The analysis of results for these practical applications shows that the approaches developed and presented in this thesis are of practical importance. It is believed that these developments form a useful step in moving inverse simulation methods from the status of an academic research topic to a practical and robust set of tools for engineering system design.
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Schultz, Steven E. "Simulation Study of a GPRAM System: Error Control Coding and Connectionism." Master's thesis, University of Central Florida, 2012. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/5486.
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A new computing platform, the General Purpose Reprsentation and Association Machine is studied and simulated. GPRAM machines use vague measurements to do a quick and rough assessment on a task; then use approximated message-passing algorithms to improve assessment; and finally selects ways closer to a solution, eventually solving it. We illustrate concepts and structures using simple examples.ID: 031001523; System requirements: World Wide Web browser and PDF reader.; Mode of access: World Wide Web.; Adviser: Lei Wei.; Title from PDF title page (viewed August 19, 2013).; Thesis (M.S.E.E.)--University of Central Florida, 2012.; Includes bibliographical references (p. 45).
M.S.E.E.
Masters
Electrical Engineering and Computing
Engineering and Computer Science
Electrical Engineering
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Barreto, Hugo. "PARALLEL SIMULATION FOR CONCURRENT DEVELOPMENT OFMANUFACTURING FLOW AND ITS CONTROL SYSTEM." Thesis, KTH, Industriell produktion, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-160268.
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Companies nowadays must innovate to achieve or retain a competitive position in the market. In manufacturing companies the introduction of a new product often requires design of the manufacturing system itself, which greatly increases product development time. Manufacturing system development has been relying lately on simulation models, which decrease the need for hardware testing, but the engineering applications needed for development are isolated. Concurrent engineering has found applications in the interface between the product and its manufacturing system. However, little has been researched in the concurrent development of the several steps of manufacturing system. This report presents a communications method to connect two simulation models in parallel, in two different computers, in what can be called a distributed simulation. One of the models is the flowsimulation modelled as a discrete event simulation (DES), while the other model represents the controlsystems modelled as finite state machines (FSM). Both models run in Matlab/Simulink. This concept allows two developers to work simultaneously in otherwise sequential development tasks, and get validation of their implementation while developing. The communication between the systems is achieved with the OPC protocol, an established technology in networked control systems (NCS). With a simple example model, the system is able to run in parallel, and the effectiveness of the parallel development was observed as the model was adjusted to its distributed format. The main difficulties found during implementation are related with the DCOM configuration necessary for the OPC technology and the setup of data exchange modes (synchronous/asynchronous). The distributed simulation requires real-time execution to run properly and reliably, which results in longer simulation times than single platform simulation. Finite State Machines were also successfully used to model control systems. This technique simplifies development and debugging due to its formal structure and visual interface. Overall, the results of this implementation offer good possibilities of further studies in the application of distributed simulation in concurrent development. This report also lays the path for more complexsimulation using this concept, both in the models used and the number of computers connected in parallel.Företag måste idag vara innovativa för att uppnå eller behålla en konkurrenskraftig position på marknaden. I tillverkande företag kräver nya produkter ofta design av tillverkningssystemet i sig, vilket i hög grad ökar produktutvecklingstiden. Tillverkningssystemutveckling har på sistone förlitat sig på simuleringsmodeller, vilket minskar behovet av att testa hårdvaran. Däremot är de tekniska mjukvarorna som behövs för utveckling isolerade. Concurrent engineering metoder har funnit applikationer vid koppling mellan produkten och produktionssystemet. Däremot har man forskat för lite i samtidig utvecklingen i de olika stegen i tillverkningssystemet. Den här rapporten presenterar en kommunikationsmetod för att ansluta två simuleringsmodeller parallellt i två olika datorer, i vad som kan kallas en distribuerad simulering. Ena modellen är den flödessimuleringen vilken modelleras som en diskret-händelsestyrd simulering (DES), medan den andra modellen är det kontrollsystemet som modelleras som Finit Tillståndsmaskin (FSM). Båda modeller körs i Matlab/Simulink. Det här innebär att två utvecklare kan arbeta samtidigt med utvecklingsuppgifterna i stället för att behöva jobba i sekvens, och få validering samtidigt som utvecklingen sker. Kommunikationen mellan systemen uppnås med den OPC specifikation, en etablerad teknik i nätverkskontrollsystem (NCS). Med en enkel exempel modell, körs systemet parallellt. Och effektiviteten observeras medan modellen anpassas till det distribuerade formatet. De största svårigheterna med implementering grundar sig i DCOM-konfiguration som är grundläggande för OPC teknik och installationen av datautbyteslägen (synkron / asynkron). Den distribuerade simuleringen kräver körning i realtid så det kan fungera korrekt och pålitligt, vilket resulterar i längre simuleringstider än en enkel plattform simulering. Finit Tillståndsmaskiner användes också med framgång för att modellera kontrollsystem. Denna tekniken förenklar utveckling och problemlösning på grund av sina formell struktur och visuell gränssnitt. Resultatet av det här projektet visar goda möjligheter till fortsatta studier i tillämpningen av distribueradsimulering i samtidig (concurrent) utveckling. Rapporten ger också goda förutsättningar för komplexare simuleringar med detta koncept, både i de modeller som användes och antalet datorer som kan anslutnas parallellt.
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Stuckey, Eric J. (Eric James) 1974. "Development of a run by run control benchmarking and simulation system." Thesis, Massachusetts Institute of Technology, 1998. http://hdl.handle.net/1721.1/50504.
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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1998.Includes bibliographical references (p. 68-69).
As the semiconductor industry begins to move toward the introduction of fault detection and classification as well as run by run (RbR) process control methodologies, the identification of application scenarios and the means to compare and benchmark available solutions is an essential step. That step has been taken for FDC, and its importance for RbR has been recognized. The work presented here examines the feasibility of such an activity for run by run control including the determination of appropriate scenarios for run by run control, and determining how meaningful comparisons or benchmarking between controllers can be accomplished. There have been a number of benefits as a result of this project. First, we have shown that the benchmarking of run by run controllers is indeed feasible, and through the development of a run by run control simulation and benchmarking framework, and the determination of a set of process scenarios, SEMATECH is well-prepared for future efforts that might undertake benchmarking and/or demonstration of available commercial and experimental run by run controllers in specific realistic scenarios. Second, we now have a better understanding of the demands on and capabilities of run by run control, as well as a better understanding of the requirements of a successful benchmarking system. This information has been obtained through a literature survey and a questionnaire distributed to SEMATECH member companies to solicit feedback on the requirements and opportunities for run by run control and run by run control benchmarking. Third, we have defined and implemented several control scenarios that can serve as benchmarking cases in a future benchmarking effort. And finally, experience has been gained in using messaging protocols to connect RbR controllers to process simulators (or actual process tools) that can be beneficial in defining a standard set of communications for RbR controllers and other process peripherals.
by Eric J. Stuckey.
S.M.
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Tipton, Austin L. "Simulation, Experimentation, Control and Management of a Novel Fuel Thermal System." Wright State University / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=wright1578320719632833.
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Oktay, Gorkem. "Design And Simulation Of A Traction Control System For An Integrated Active Safety System For Road Vehicles." Master's thesis, METU, 2008. http://etd.lib.metu.edu.tr/upload/2/12610204/index.pdf.
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Active safety systems for road vehicles make a crucial preventive contribution to road safety. In recent years, technological developments and the increasing demand for road safety have resulted in the integration and cooperation of these individual active safety systems. Traction control system (TCS) is one of these individual systems, which is capable of inhibiting wheel-spin during acceleration of the vehicle on slippery surfaces.
In this thesis, design methodology and simulation results of a traction control system for four wheeled road vehicles are presented. The objective of the TCS controller is basically to improve directional stability, steer-ability and acceleration performance of vehicle by controlling the wheel slip during acceleration.
In this study, the designed traction control system based on fuzzy logic is composed of an engine torque controller and a slip controller. Reference wheel slip values were estimated from the longitudinal acceleration data of the vehicle. Engine torque controller determines the throttle opening angle corresponding to the desired wheel torque, which is determined by a slip controller to track the reference slip signals. The wheel torques delivered by the engine are compensated by brake torques according to the desired wheel torque determined by the slip controller. Performance of the TCS controller was analyzed through several simulations held in MATLAB/Simulink for different road conditions during straight line acceleration and combined acceleration and steering. For simulations, an 8 DOF nonlinear vehicle model with nonlinear tires and a 2 DOF nonlinear engine model were built.
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Milagaia, Rui Rodrigues. "Dpws middleware to support agent-based manufacturing control and simulation." Master's thesis, FCT - UNL, 2009. http://hdl.handle.net/10362/1872.
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Dissertação apresentada na Faculdade de Ciências e Tecnologia da Universidade Nova de Lisboa para obtenção do grau de Mestre em Engenharia Electrotécnica e de ComputadoresIn present manufacturing systems, the current challenge is the development of highly reconfigurable, truly distributed solutions. The tendency is to build manufacturing systems with autonomous, intelligent and distributed components that will support reconfiguration and adaptability. The most promising paradigms for the implementation of such systems are multi-agents and service oriented architectures (SOA), mainly over the DPWS (Device Profile for Web Services) implementation which was aimed at devices. An important limitation of most current multi-agent systems is that the management system is not totally distributed. Failure in the agent responsible for the registry can overthrow the entire system. DPWS does not have this limitation, since the management system is totally distributed. However, DPWS does not support agent autonomy notions as efficiently. The possibility of creating a truly distributed multi-agent system by linking both approaches led to this thesis. A Middleware layer was developed that enables agents to benefit from DPWS functionalities in order to reach the proposed goal. This middleware layer joins agents, databases, hardware, simulators, human interface applications such as production system management, error correction and maintenance, etc. To prove this concept a 3D model of an agent controlled manufacturing system with transporters augmented with DPWS communication interfaces was developed.
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Bornman, Waldo. "Improved mine cooling system performance through the control of auxiliary systems / W. Bornman." Thesis, North-West University, 2012. http://hdl.handle.net/10394/9105.
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Industrial and mining sectors are amongst the largest single energy consumers in South
Africa, making them a primary focus for implementing energy saving initiatives.
Refrigeration systems on mines are responsible for consuming up to25 % of the electrical
energy consumption on a typical South African deep level mine. Ample opportunities to
reduce the energy consumption of these systems exists, as many of the current systems rely
on old technology and function under partial or inadequate control management.
In compiling this thesis, various energy saving strategies on deep level mines were
investigated. In specific, the effects of controlling and improving the cooling auxiliaries.
Scenarios were investigated and simulated, where after an optimum solution was
implemented. Implementations, such as the ones covered in this dissertation, form part of the
IDM (Integrated Demand Management) energy efficiency incentive introduced by Eskom,
where funding is made available based on actual power saving; ensuring that the projects will
be financially viable to the clients.
Reduced electrical energy consumption realised from the abovementioned projects were
measured, captured and compared to the consumption before project implementation to
determine the achieved savings. Savings of up to 30 % of the plant installed capacity were
realised, providing average savings of up to 2.3 MW per day.Thesis (MIng (Mechanical Engineering))--North-West University, Potchefstroom Campus, 2013
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Young, Derek W. G. "Design, simulation and practical implementation of optimal excitation controllers for synchronous generators." Thesis, University of Aberdeen, 1987. http://digitool.abdn.ac.uk/R?func=search-advanced-go&find_code1=WSN&request1=AAIU010652.
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This thesis describes the design of multivariable excitation controllers for synchronous generators, and their practical implementation on a laboratory machine system. The main objectives of the investigation were aimed at extending the steady-state stability limit of the generator and improving its general controllability. The present work is principally concerned with the implementation and test of the designs. Instrumentation has been developed to measure and combine feedback signals; this instrumentation and the laboratory generator system are described in detail. The performances of the controllers are predicted by computer simulation and evaluated by practical testing; attention is focussed on comparison of predicted and experimental performances. The theoretical basis of the design strategy is described, in which an optimal control algorithm applies the system states as feedback signals to the open-loop system, thereby shifting certain of the system eigenvalues to more desirable, predetermined locations. The state variables are selected as physically measurable quantities which obviates the need for implementing state estimation techniques.
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Huang, Qi. "Development of a PKM control system : by design, modelling, simulation and integration /." Stockholm, 2001. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3138.
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Ding, Ting. "Advanced surface movement guidance and control system investigation and implementation in simulation." Thesis, Cranfield University, 2010. http://dspace.lib.cranfield.ac.uk/handle/1826/6767.
Full textAbstract:
The Surface Movement Guidance and Control System (SMGCS) is a system
providing the surveillance, routing, guidance and control supports to the airport
traffic. The moving objects being managed include all the aircraft and vehicles
in the interested area on the surface; the personnel making use of this system
are the pilots, vehicle drivers, and ground controllers.
The airport surface traffic management has long been discussed because of the
operational challenges; this includes the increasing complexity of the field
movement management and the density of airport traffic. To improve airport
operation qualities, the Advanced Surface Movement Control and Guidance
System (A-SMGCS) was introduced. In terms of architecture and capability
differences, there are two levels of the A-SMGCS, which are A-SMGCS I & II.
The positive impacts on the airport surface operation are: safety, capacity,
efficiency, human factor conditions, and economic issues.
This project deals with an investigation on SMGCS baseline and the A-SMGCS,
covering the system conception, background, current developments and relative
technologies. The applications in practical operations are discussed as well.
There is also an analysis about the airport surface incursion classification and
severity. Based on this, a simulation is presented to illustrate the practical
applications of the A-SMGCS. The simulation results show the functions of
Human Machine Interface (HMI) in A-SMGCS, including the designation and
diversion for clearance, the real-time view of surface target movements and the
indications for contracted incursions.
Over all, the research aims are to work on an investigation and explanation of
A-SMGCS, and to implement a simulation of the system functions. The
implementation includes the image processing, system architecture definition in
Simulink, Graphical User Interface (GUI) design for the HMI, and the
corresponding Matlab programming for simulation environment establishment.
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McCartney, Shauna. "The simulation and control of a grid-connected wind energy conversion system." Master's thesis, University of Central Florida, 2010. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/4680.
Full textAbstract:
With the rising cost of petroleum, concerns about exhausting the fossil fuels we depend on for energy, and the subsequent impacts that the burning of these types of fuels have on the environment, countries around the world are paying close attention to the development of renewable types of energy. Consequently, researchers have been trying to develop ways to take advantage of different types of clean and renewable energy sources. Wind energy production, in particular, has been growing at an increasingly rapid rate, and will continue to do so in the future. In fact, it has become an integral part in supplying our future energy needs, making further advancements in the field exceedingly critical. A 2 MW wind energy conversion system (WECS) is presented and has been simulated via the dynamic simulation software Simulink. This WECS consists of a 2 MW permanent magnet synchronous generator connected to the transmission grid through a power conversion scheme. The topology of this converter system consists of a passive AC/DC rectifier as well as a PWM DC/AC IGBT inverter, used to interface the DC link with the grid. The inverter has an integrated current control system for power factor correction to improve output power stability. The described WECS enhances grid-side tolerance by buffering wind power disturbances demonstrated by its capability to isolate the grid from wind speed fluctuations. It also optimizes wind energy capture through harmonic filtering, enhancing output power quality. These findings have the potential to lead to further advancements including the capability for island operation and integration to a smart grid.ID: 029050708; System requirements: World Wide Web browser and PDF reader.; Mode of access: World Wide Web.; Thesis (M.S.E.E.)--University of Central Florida, 2010.; Includes bibliographical references (p. 66-70).
M.S.E.E.
Masters
Department of Electrical Engineering and Computer Science
Engineering and Computer Science
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Bagheri, Shahriar. "Modeling, Simulation and Control System Design for Civil Unmanned Aerial Vehicle (UAV)." Thesis, Umeå universitet, Institutionen för tillämpad fysik och elektronik, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-96458.
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Unmanned aerial systems have been widely used for variety of civilian applications over the past few years. Some of these applications require accurate guidance and control. Consequently, Unmanned Aerial Vehicle (UAV) guidance and control attracted many researchers in both control theory and aerospace engineering. Flying wings, as a particular type of UAV, are considered to have one of the most efficient aerodynamic structures. It is however difficult to design robust controller for such systems. This is due to the fact that flying wings are highly sensitive to control inputs. The focus of this thesis is on modeling and control design for a UAV system. The platform understudy is a flying wing developed by SmartPlanes Co. located in Skellefteå, Sweden. This UAV is particularly used for topological mapping and aerial photography. The novel approach suggested in this thesis is to use two controllers in sequence. More precisely, Linear Quadratic Regulator (LQR) is suggested to provide robust stability, and Proportional, Integral, Derivative (PID) controller is suggested to provide reference signal regulation. The idea behind this approach is that with LQR in the loop, the system becomes more stable and less sensitive to control signals. Thus, PID controller has an easier task to do, and is only used to provide the required transient response. The closed-loop system containing the developed controller and a UAV non-linear dynamic model was simulated in Simulink. Simulated controller was then tested for stability and robustness with respect to some parametric uncertainty. Obtained results revealed that the LQR successfully managed to provide robust stability, and PID provided reference signal regulation.
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Wilkinson, S. P. "Development of flexible manufacturing system control algorithms using simulation tools and techniques." Thesis, Leeds Beckett University, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.358558.
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Gagiu, Răzvan-Florin-Rainer, and Kakkattil Paulose Abin. "Modeling and Simulation of novel Environmental Control System for a combat aircraft." Thesis, Linköpings universitet, Maskinkonstruktion, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-155977.
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The present thesis deals with the analysis of Environmental Control System (ECS) as a part of the aircraft conceptual design. The research focuses on developing methods for modelling, simulation and optimization of current and future cooling technologies suitable for aircraft applications. The work started with a pre-study in order to establish the suitability of different cooling technologies for ECS application. Therefore, five technologies namely, Bootstrap (BS), Reverse-Bootstrap (RBS), vapour cycle system (VCS), magnetic cooling (MC) and thermo-electric cooling (EC), were assessed from a theoretical point of view by the method of benchmarking. This resulted into the selection of three most suitable technologies that were further modelled and simulated in Dymola. In order to compare the optimum designs for each technology, the models were optimized using the modeFRONTIER software. The comparison was performed based on the optimum ratio of maximum power of cooling and minimum fuel penalty. The results showed that VCS has the “best” performances compared to BS and RBS. In addition to the active technologies, passive cooling methods such as liquid cooling by means of jet-fuel and poly-alpha-olefin were considered to address high heat transfer rates. In order to apply the cooling technologies in the ECS, concept system architectures were formulated using the functional analysis. This led to the identification of basic functions, components and sub-systems interaction. Based on the comparison carried out previously and the functional analysis, two ECS architectures were developed. Design optimization procedure was applied further in order to assess each concept and also to study the differences between the two concept architectures. The results depict the complex interaction of different key parameters of the architectures and their influence on the outcome. The study culminated with a proposed methodology for formulation of systems architecture using information from the optimization results and a robust functional analysis method. To sum up, the thesis proposes a simulation-based optimization method that allows inclusion of ECS system in aircraft conceptual design phase. The study also proves the complexity of the conceptual design stage for ECS architectures which highly influences the design of the combat aircraft.
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Ferrara, Marco Ph D. Massachusetts Institute of Technology. "Digital plasma control system and Alcasim simulation code for Alcator C-Mod." Thesis, Massachusetts Institute of Technology, 2005. http://hdl.handle.net/1721.1/34452.
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Includes bibliographical references (p. 105-107).Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Nuclear Engineering, 2005.
Abstract The Alcator C-Mod control system was upgraded to digital architecture DPCS (Digital Plasma Control System). The main features of the digital system are the high flexibility, robustness and maintainability. The hardware consists of low-latency digitizers, a single processor Xeon server and DAC output cards. The software is a set of IDL routines. In the current version of the software, DPCS is emulating the PID controller of the previous control system Hybrid, but some advanced and adaptive features have already been implemented, for example the compensation of the input offsets. DPCS has been operating successfully since the beginning of the 2004-2005 experimental campaign. One of the advantages of a digital control system is that a simulator can be embedded in the system. We programmed a Matlab-Simulink simulator Alcasim for Alcator C-Mod. The simulator is a versatile tool to model the tokamak and the plasma, to interface with the database of the real experiments and to test new control algorithms, while running open loop and closed loop simulations. The powerful block-diagram language of Simulink allows to easily update the various components of the feedback loop, should the need arise. Preliminary results from the simulations of real shots are presented and discussed.
by Marco Ferrara.
S.M.
47
Srisamang, Richard, Richard Todd, Sudarshan Bhat, and Terry Moore. "UAV INTEGRATED VISUAL CONTROL AND SIMULATION SYSTEM ARCHITECTURE AND CAPABILITIES IN ACTION." International Foundation for Telemetering, 2000. http://hdl.handle.net/10150/606815.
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International Telemetering Conference Proceedings / October 23-26, 2000 / Town & Country Hotel and Conference Center, San Diego, CaliforniaUnmanned Aerial Vehicles (UAV) are becoming a significant asset to the military. This has given rise to the development of the Vehicle Control and Simulation System (VCSS), a low-cost ground support and control system deployable to any UAV testing site, with the capability to support ground crew and pilot training, real-time telemetry simulation, distribution, transmission and reception, mission planning, and Global Positioning System (GPS) reception. This paper describes the development of the VCSS detailing its capabilities, demonstrating its use in the field, and showing its novel use of internet technology for vehicle control telemetry distribution.
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Wang, I.-Wei, and 王瑋憶. "ABS Control System Design and Simulation." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/78655093982315762640.
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碩士中華技術學院
電子工程研究所在職專班
97
In this thesis, the controller of anti-lock braking system (ABS) of motorcycle is proposed. The information of static characteristic of hydraulic module test is used to analysis and establish system mathematic model. The model includes the dynamics of the motorcycle, the hydraulic, the wheel control system and the brake mechanism. Based on the model the controller is designed in two different ways：A fuzzy controller to control the slip ratio at a desired value 0.2 is designed another traditional controller based on PR rule is also proposed.
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Lin, Yui Han, and 林裕涵. "System identification of nonlinear open-loop cardiovascular control systems :A simulation system." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/36687172146836767603.
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碩士國立陽明大學
醫學工程研究所
89
In human physiological mechanisms, common linear systems analysis can be applied to understand the cardiovascular systems. However, some research results have revealed that the atrial heart beats and arterial blood pressure, instead of being independent, will affect each other in a non-linear manner. Therefore, some phenomena cannot be explained simply by linear systems. In this research, we used a non-linear Volterra-Wiener model as the major approach to investigate the deficiency from linear systems. Traditional algorithms to estimate the Volterra kernels, such as cross-correlation method and exact orthogonalization techniques, are quite restricted by requiring longer data length and strict white input signals. Recently, a better result can be obtained by Laguerre expansion, a faster algorithm that is not restricted by the above conditions. The non-linear Volterra-Wiener method is used to identify the simulated system in the first place to verify its reliability in this study. The results prove that it can provide accurate identification. After simulation, this Volterra-Wiener model can then be applied to investigate the non-linear characteristics that may exist in the cardiovascular systems of normal and atrial-ventricular block patients. Compared with the analysis results obtained merely from a linear approach, the difference of cardiovascular systems between A-V block patients and normal people can be understood more clearly.
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Hur, Jaeho 1965. "Multi-robot system control using artificial immune system." Thesis, 2007. http://hdl.handle.net/2152/3574.
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For the successful deployment of task-achieving multi-robot systems (MRS), the interactions must be coordinated among the robots within the MRS and between the robots and the task environment. There have been a number of impressive experimentally demonstrated coordinated MRS. However it is still of a premature stage for real world applications. This dissertation presents an MRS control scheme using Artificial Immune Systems (AIS). This methodology is firmly grounded in the biological sciences and provides robust performance for the intertwined entities involved in any task-achieving MRS. Based on its formal foundation, it provides a platform to characterize interesting relationships and dependencies among MRS task requirements, individual robot control, capabilities, and the resulting task performance. The work presented in this dissertation is a first of its kind wherein the principles of AIS have been used to model and organize the group behavior of the MRS. This has been presented in the form of a novel algorithm. In addition to the above, generic environments for computer simulation and real experiment have been realized to demonstrate the working of an MRS. These could potentially be used as a test bed to implement other algorithms onto the MRS. The experiment in this research is a bomb disposal task which involves a team of three heterogeneous robots with different sensors and actuators. And the algorithm has been tested practically through computer simulations.