Tesi sul tema "Controller"
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Ronco, Eric. "Incremental polynomial controller networks two self-organising non-linear controllers /". Thesis, Connect to electronic version, 1997. http://hdl.handle.net/1905/181.
Testo completoGremberg, Johanna. "Ökad kontroll för controllern : - hur en controller ska arbeta för att tillföra största möjliga verksamhetsnytta". Thesis, Mälardalens högskola, Akademin för hållbar samhälls- och teknikutveckling, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-12409.
Testo completoParmar, Akash, e Bremberg Isabella Kormos. "Vad innebär det empiriska fenomenet hållbarhetscontroller och vad arbetar denna med? : En explorativ studie på hållbarhetscontrollers roll i företag". Thesis, Linnéuniversitetet, Institutionen för ekonomistyrning och logistik (ELO), 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-105881.
Testo completoBackground and problem discussion: As a result of the company's and society's growing awareness of sustainability, it has established new ideas about what constitutes control information in companies. Increasingly, sustainability has been integrated within the organization, and the company's internal processes have changed. The change in the internal processes has developed it to be more than just financial information and sustainable information. Tasks have thus been reshaped and challenged, which has also changed the controller's work. Sustainability has received such a significant focus that a new role has been created, called a sustainability controller. A sustainability controller has not been discussed before in literature, which is the following study's intentions. Purpose: This study aims to contribute knowledge about what a sustainability controller is and does in an organization. This matter is investigated on what tasks and knowledge a sustainability controller performs and possesses to understand the role further. Methodology: The study is based on a qualitative method that includes an exploratory study. The empirical data collection was done through semi-structured interviews, which have been held with eight sustainability controllers and a sustainability strategist—furthermore, utilizing electronic sources and documents in the form of job advertisements. The theoretical material is obtained from the scientific literature on background checks, tasks, roles, knowledge, and sustainability. Conclusion: According to this study, sustainability controllers are considered a hybrid of traditional controllers and business controllers. It works with a business's sustainability reporting and being a business partner that assists the management with data. The fundamental role of sustainability controllers is the sustainability report, which is linked to a bean counter. The role analyst emerged most clearly in the sustainability controller and was the most significant. Today's role as an educator is minor as sustainability has become so integrated; however, the role needs to act more as a coach due to the significant focus on sustainability. Thus, the study could see that the role has shifted from being a traditional bean counter to a more business partner to the organization. The sustainability controller works like a controller where what differs is that the focus is on social and environmental aspects. As a result, knowledge about sustainability, the guidelines, and the framework was essential to possess the role. Furthermore, good knowledge is expected for the business and innovative thinking, which is vital to constantly develop sustainability work and apply new guidelines in the business context. The number of sustainability controllers on the market will gradually increase. With the help of this study, more companies will gain insight into why companies choose to have a sustainability controller in their operations.
Nilvetti, Fabio. "Controllo delle vibrazioni mediante l'uso di PAC (Programmable Automation Controller)". Doctoral thesis, Universita degli studi di Salerno, 2012. http://hdl.handle.net/10556/368.
Testo completoCon l'espressione `Vibration Control' si intende l'insieme delle tecniche e dei dispositivi che consentono di mitigare in modo rapido, a dabile e preciso le vibrazioni di macchine o strutture, dovute al loro stesso funzionamento o a causa di forze esterne. Nella realizzazione dei sistemi di controllo delle vibrazioni assumono oggi primaria rilevanza sul piano tecnico ed economico l'hardware impiegato. Attuatori elettrici e oleodinamici, dispositivi passivi,sensori, convertitori elettronici e unit a di controllo rappresentano una parte fondamentale di tali sistemi e ne influenzano largamente le prestazioni. Il contributo del singolo componente alle prestazioni complessive del controllo è tuttavia valutato compiutamente solo se ci si pone in un'ottica di sistema, nella quale le mutue interazioni tra componenti elettronici, parti meccaniche e algoritmi di controllo trovano la loro corretta sintesi. Nei sistemi di controllo delle vibrazioni, è decisiva la scelta del `controller'. Scopo del presente lavoro e stato appunto quello di sviluppare un sistema di controllo delle vibrazioni che coniughi le diverse esigenze di precisione, determinismo e elevata velocità di servo-aggiornamento, tipiche di un circuito stampato, alle esigenze di flessibilità ed economicità, tipiche delle soluzioni basate su DSP, e alle elevate capacità di calcolo tipiche di un pc. Per far ciò il ruolo di controller e a dato ad un dispositivo PAC (Programmable Automation Controller) basato su tecnologia FPGA (Field Programmable GateArray) che consente di codifcare, in modo rapido, le funzionalit a richieste al controllo su un dispositivo programmabile di tipo hardware e per questo dalle prestazioni paragonabili a quelle di un circuito stampato. With the expression `Vibration Control' refers to the set of techniques and devices that let you mitigate quickly, reliably and accurately the vibrations of machines or structures, due to themselves operation or due to external forces. In the implementation of vibration control systems today assume pri- mary importance, in the technical and economic terms, the hardware used. Electrical and hydraulic actuators, passive devices, sensors, electronic con- verters and control units are a fundamental part of these systems and they greatly a ects on the performance. In systems of vibration control, is decisive the choice of the controller. The purpose of this work was to develop a system of vibration control which combines the various requirements of precision, determinism and high-speed servo-update, typical of a printed circuit board, the exibility and economy typical of solutions based on DSP, and high computing power of a typical PC. To do this, the role of controller is assigned to a device (PAC programma- ble automation controller) based on technology FPGA (Field Programmable Gate Array) which allows to encode, quickly, the required functionalities to the control, on a programmable hardware device and for this with perfor- mance comparable to that of a printed circuit board. [a cura dell'autore]
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Andersson, Robby. "FPGA design of a controller for a CAN controller". Thesis, Linköping University, Department of Electrical Engineering, 2003. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-1557.
Testo completoThis diploma work describes how an FPGA is designed to control a CAN controller. It describes the different tools used when working with Actel’s design tools and the sequence of work applied. It gives a short overview of a multiplexer, the CAN bus, an analog/digital-converter and some more information on the actual FPGA. It also brings up the design process of the FPGA, planning, coding, simulating, testing and finally programming the FPGA. The different parts implemented in the FPGA are a shift-register and two state- machines that are connected with each other. They work together to control the SJA1000 CAN controller made by Philips. They also receive data from the analog/digital-converter that they forward onwards to the CAN controller that forward the data on the CAN bus.
Färm, Josefine, e Caroline Jönsson. "Shedding light on the controller profession : controllers’ value-creation in Swedish organizations". Thesis, Högskolan Kristianstad, Fakulteten för ekonomi, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:hkr:diva-18558.
Testo completoWinberg, Ulf. "DRAM Controller Benchmarking". Thesis, Computer Engineering, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-19190.
Testo completoSince a few years, flat screen TVs, such as LCD and plasma, has come to completelydominate the market of televisions. In a SoC solution for digital TVs, severalprocessors are used to obtain a decent image quality. Some of the processorsneed temporal information, which means that whole frames need to be storedin memory, which in turn motivates the use of SDRAM memory. When higherdemands of resolution and image quality arrives, greater pressure is put on theperformance of the SoC memory subsystem, to not become a bottleneck of thesystem.
In this master thesis project, a model of an existing SoC for digital TVs is usedto benchmark and evaluate the performance of an SDRAM memory controllerarchitecture study. The two major features are the ability to reorder transactionsand the compatibility with DDR3. By introducing reordering of transactions, thechoice is given to the memory controller to service memory requests in an orderthat decreases bank conflicts and read/write turn arounds. Measurements showthat a utilization of 86.5 % of the total available bandwidth can be achieved, whichis 18.5 percentage points more, compared to an existing nonreordering memorycontroller developed by NXP.
Murray, Nicholas Durante. "Nonlinear PID controller". Thesis, This resource online, 1990. http://scholar.lib.vt.edu/theses/available/etd-03242009-040653/.
Testo completoKarim, Omair. "Electronic frequency controller". Thesis, Blekinge Tekniska Högskola, Institutionen för tillämpad signalbehandling, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-690.
Testo completoClancy, Daniel J. "Multiresolutional controller design /". The Ohio State University, 1997. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487946103565287.
Testo completoHenningsson, Mathilda, e Alisa Klokic. "Controllerns roll - från bean counter till affärspartner : En kvalitativ innehållsanalys av den svenska arbetsmarknaden för en controller". Thesis, Linnéuniversitetet, Institutionen för ekonomistyrning och logistik (ELO), 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-96745.
Testo completoJohansson, Sanna, e Maria Waderoth. "Controllerns funktioner - En studie i vad som skiljer organisationsformer åt i användandet av controllern". Thesis, Halmstad University, School of Business and Engineering (SET), 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-2671.
Testo completoI dagens platsannonser frågas det ofta efter controllers, men få vet egentligen vad yrket innebär eftersom rollen skiljer sig från arbetsplats till arbetsplats. Vi ville studera detta diffusa begrepp för att få en större klarhet i vad titeln innebär och vilka arbetsuppgifter som är karakteristiska controlleruppgifter. Syftet med uppsatsen är att beskriva vilka arbetsuppgifter som har störst betydelse i olika organisationer. Utifrån tidigare forskning har vi skapat en modell som visar en uppdelning mellan olika organisationsformer och vilken/vilka av controllerns funktioner som blir extra betonad i de olika.
Vi har gjort en undersökning omfattande 30 telefonintervjuer med controllers eller personer med motsvarande arbetsuppgifter. Intervjuerna har utgått från en intervjuguide med både öppna och slutna frågor.
Då vi analyserade vårt empiriska material med hjälp av statistiska tester kom vi fram till att de arbetsuppgifter controllern värderar högst är rapportering, strategiutveckling samt budgetanalys. Vårt material visade även att användandet av controllern skiljer sig i olika organisationsformer. Utifrån våra 22 hypoteser kunde vi statistiskt säkerställa att controllers arbetande i organisationer som befinner sig i en bransch med utmärkande låg eller hög osäkerhet eller i äldre organisationer lägger mindre vikt på budgetering och budgetanalys samt att controllers i den offentliga sektorn lägger större vikt på internkontroll.
RANJAN, SHILPA. "MINIMISATION OF TORQUE RIPPLE OF HYSTERESIS CURRENT CONTROLLED PMSM USING PI-RES CONTROLLER". Thesis, DELHI TECHNOLOGICAL UNIVERSITY, 2021. http://dspace.dtu.ac.in:8080/jspui/handle/repository/18871.
Testo completoBengtsson, Carl Johan. "SmartMedia-controller på chip". Thesis, Linköping University, Department of Electrical Engineering, 2002. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-1127.
Testo completoThis report deals with the design of a controller for SmartMedia™ flash memory cards, based on a hardware description found in the SmartMedia™ Interface Library - SMIL.
The design was made on logic gate level, using standard cells in OrCAD Capture. After simulation of the design in PSpice A/D, it was exported as an EDIF netlist, which was used to make a chip layout in L-Edit, a layout tool for making integrated circuits. The layout was made using a method called Standard Place and Route - SPR, where the layout tool places standard cells from a library and connects them according to the EDIF netlist.
A netlist which could be simulated in PSpice was extracted from the finished chip layout to verify that the function of the design was the same as before the transition from schematic to layout.
The standard cells in the library used to make the chip layout have to meet certain criteria in order for both SPR and extraction to work and this is also discussed.
SAAD, SHAIKH MUHAMMAD. "Quadrocopter Fuzzy Flight Controller". Thesis, Örebro universitet, Institutionen för naturvetenskap och teknik, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:oru:diva-26421.
Testo completoDiao, Lili. "Nonlinear bounded controller design". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/MQ59374.pdf.
Testo completoChang, Wei-Chieh. "Transputer-based robot controller /". Online version of thesis, 1990. http://hdl.handle.net/1850/11557.
Testo completoDahm, Rickard. "Autotuning of RPM controller". Thesis, Linköpings universitet, Fysik och elektroteknik, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-101995.
Testo completoWatson, Wyatt. "USB remote machine controller". Thesis, Georgia Institute of Technology, 1999. http://hdl.handle.net/1853/17366.
Testo completoWellstead, Kevin. "Robust polynomial controller design". Thesis, Brunel University, 1991. http://bura.brunel.ac.uk/handle/2438/4866.
Testo completoGoddard, Philip John. "Performance-preserving controller approximation". Thesis, University of Cambridge, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.361711.
Testo completoAkkam, Mazen. "Microcomputer based heat controller". Thesis, Kansas State University, 1985. http://hdl.handle.net/2097/9816.
Testo completoGriesebner, Klaus. "Model-based Controller Development". Thesis, Högskolan i Halmstad, Akademin för informationsteknologi, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-34929.
Testo completoIzumi, Shinsaku. "Studies on Controller Networks". 京都大学 (Kyoto University), 2015. http://hdl.handle.net/2433/199448.
Testo completoPark, Jisang. "Controller certification the generalized stability margin inference for a large number of MIMO controllers /". Diss., Connect to a 24 p. preview or request complete full text in PDF format. Access restricted to UC campuses, 2007. http://wwwlib.umi.com/cr/ucsd/fullcit?p3296803.
Testo completoTitle from first page of PDF file (viewed Mar. 24, 2008). Available via ProQuest Digital Dissertations. Vita. Includes bibliographical references (p. 98-100).
Nilsson, Kajsa, e Jakob Persson. "Hur speglas controllern i andras ögon? : En kvalitativ studie kring controller-yrket utifrån förväntningar". Thesis, Linnéuniversitetet, Institutionen för ekonomistyrning och logistik (ELO), 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-39780.
Testo completoBackground: Technology development and increased globalization has made the Controller profession to something complex that involves many aspects. We want to process this subject from the point of view of people who is about to hire a Controller. We wonder how these people know what they are looking for since it is a large uncertainty about the concept. Purpose: The purpose of this essay is to examine the expectations that employers have towards a Controller and analyze these based on previous research and literature. The essay will focus on partly the job assignments and its developing, and partly on the personality and skills. We want to get a better understanding about how the employers, via their expectations, interprets the concept of Controller. Method: The purpose of this study has been achieved through an abductive method. The empirical data was collected through semi-structured interviews with people in charge of hiring the Controllers and complemented with job advertisings. Conclusion: The expectations of the Controller are fundamentally quite similar but have some differences in several aspects. There are different opinions from the respondents how the Controller role should develop in thefuture. The study indicates that there is some uncertainty in the concept that is Controller.
Claro, Érica Rejane Pereira. "Localização de canais afetando o desempenho de controladores preditivos baseados em modelos". reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2016. http://hdl.handle.net/10183/149927.
Testo completoThe scope of this dissertation is the development of a method to detect the models of the dynamic matrix that are affecting the performance of model-based predictive controllers. The proposed method is based on the cross correlation analysis between the nominal controller error and an estimate of the contribution of each channel to the controller output, filtered by the controller nominal sensitivity function. The method can be used in the performance assessment of controllers employing variables controlled at the setpoint and/or those controlled within ranges. This dissertation presents the results of the successful application of the method to the quadruple-tank process (JOHANSSON, 2000), for which three scenarios were evaluated. In the first scenario, the method correctly located gain and dynamic mismatches on a model-based predictive controller (MPC controller). In the second one, the method was used to evaluate the influence of an external variable to improve the performance of a controller affected by unmeasured disturbances. In the third scenario, the method located null models that should be included in the dynamic matrix of a decentralized MPC controller. The results of the three scenarios were compared with the ones obtained through the method proposed by BADWE, GUDI e PATWARDHAN (2009). The proposed method was considered more robust than the reference one for not requiring parameters estimation performed by the user to provide good results. This dissertation also includes a case study about the application of the method on the performance assessment of an industrial linear predictive controller of decentralized structure. The controller has twelve controlled variables, eight manipulated variables, and four unmeasured disturbances and is applied to a propylene-propane fractionation system of a petrochemical industry. The performance assessment allowed reducing the scope of the controller revision to nineteen channels of the models matrix, fourteen of which were null models that should be included in the controller. The efficacy of the proposed method was confirmed by repeating the model quality evaluation for all the controlled variables.
Hermansson, Olaf. "Resistance spot welding equipment controller - Beijer iX T7B Softmotion based weld equipment controller". Thesis, Mittuniversitetet, Avdelningen för elektronikkonstruktion, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:miun:diva-28857.
Testo completoSousa, Rafael Vieira de. "CAN (Controller Area Netwoork): uma abordagem para automação e controle na área agrícola". Universidade de São Paulo, 2002. http://www.teses.usp.br/teses/disponiveis/18/18135/tde-30102007-115747/.
Testo completoInternational standards based on the digital data communication protocol CAN - Controller Area Network - are being developed and applied to embedded electronics in agricultural and environmental area to integrate different devices. In Brazil, the application of CAN is restricted to imported machines. Small and medium manufactures also need some support to apply this technology and offer compatible equipment to the market. This work present the searching of integrated circuits, transducers, elaborated devices (GPS receivers, embedded computers, handled computers, digital radios and intelligent sensors and actuators) and high level protocols for the development CAN based systems. The systematization of the results generate a practical reference documentation of CAN for agricultural machinery (tractor, combine and implements) designs and agricultural automation designs, such as irrigation, greenhouse and livestock systems.
Glenn, Russell David. "A reduced order controller design method based on the Youla parameterization of all stabilizing controllers". Ohio : Ohio University, 1995. http://www.ohiolink.edu/etd/view.cgi?ohiou1174396903.
Testo completoGoodman, Ryan. "Wi-fi evapotranspiration irrigation controller". Click here to view, 2010. http://digitalcommons.calpoly.edu/eesp/22/.
Testo completoProject advisor: James Harris. Title from PDF title page; viewed on Apr. 19, 2010. Includes bibliographical references. Also available on microfiche.
Chang, Kuang-Yuan, e 張廣元. "Controller Tuning for Vector-Controlled Induction Motor Drives". Thesis, 1997. http://ndltd.ncl.edu.tw/handle/87765522089398234158.
Testo completo國立台灣工業技術學院
電機工程技術研究所
85
This thesis investigates the controller parameter tuning method for both a closed-loop vector-controlled and a sensorless vector-controlled induction motor drives. Asystemmatic procedure based on root-locus and frequency renponse techniques is proposed to tune the controller parameters. The thesis also proposes the design of a rotor flux observer for improving the low-speed performance of sensorless vector-controlled drive. In hardware implementation the 80196MC single-chip micro- processor is used for control software development. In estimatingthe rotor flux, the actual stator voltages are not measured, insteadthe stator voltage commands are used. The cost of the system isreduced since no voltage sensor is used for stator voltage sensing.Also, the rotor flux is estimated using the rated flux value and alow-pass filter so as to compensate the deviation caused by theintegrator during low-speed operation. Adeadtime compensationcontrol board is added to the hardware, which results in goodperformance during low speed with loads. The experimental results show good performance for both the closed-loop and the sensorless vector-controlled drives under no-load and loading conditions at various speeds.
Kuang-Yuan, Chang, e 張廣元. "Controller Tuning for Vector-Controlled Induction Motor Drives". Thesis, 1997. http://ndltd.ncl.edu.tw/handle/21287027134531243267.
Testo completo國立臺灣科技大學
電機工程技術研究所
86
This thesis investigates the controller parameter tuning method for both a closed-loop vector-controlled and a sensorless vector-controlled induction motor drives. Asystemmatic procedure based on root-locus and frequency renponse techniques is proposed to tune the controller parameters. The thesis also proposes the design of a rotor flux observer for improving the low-speed performance of sensorless vector-controlled drive. In hardware implementation the 80196MC single-chip micro- processor is used for control software development. In estimatingthe rotor flux, the actual stator voltages are not measured, insteadthe stator voltage commands are used. The cost of the system isreduced since no voltage sensor is used for stator voltage sensing.Also, the rotor flux is estimated using the rated flux value and alow-pass filter so as to compensate the deviation caused by theintegrator during low-speed operation. Adeadtime compensationcontrol board is added to the hardware, which results in goodperformance during low speed with loads. The experimental results show good performance for both the closed-loop and the sensorless vector-controlled drives under no-load and loading conditions at various speeds.
Wang, Chin-Li, e 王進力. "PID Controller Tuning for Vector-Controlled Induction Motor Drivers". Thesis, 2001. http://ndltd.ncl.edu.tw/handle/80550319879059326660.
Testo completo淡江大學
電機工程學系
89
Title of Thesis Total pages:64 PID Controller Tuning for Vector-Controlled Induction MotorDrivers Key word: Proportional-Integral-Derivative, performance index, Simulated Annealing Name of Institute: Graduate Institute of Electrical Engineering, Tamkang University Graduate date:July,2001 Degree conferred:Master Name of student: Wang Chin-Li Advisor:Dr.Ying-Tung Hsiao 王 進 力 蕭 瑛 東 博 士 Abstract: Proportional-integral-derivative (PID) controller is a well-known technique for industrial control processes. This is due to its simple structure and robust performance in a wide range of operating conditions. The design of such a controller requires specification of three parameters: proportional gain (Kp), integral time constant (Ki), and derivative time constant (Kd), Traditionally, the problem has been handled by a trial and error approach. Design engineers must tune PID controllers manually and usually take considerable time. This work presents a optimal approach to design PID controllers. The problem formulation of the design PID controller adopts four performance index maximum overshoot, rise time, setting time and integral absolute error as the objective. Moreover, we propose a solution algorithm based on the simulated annealing technique to determine the controller parameters for getting a well performance for a given plant. Simulation results demonstrate that better control performance can be achieved in comparison with Ziegler-Nichols method.
Shyur, Dar-Ren, e 徐達仁. "Robust Controller Design for a Field-Oriented Controlled Induction Motor". Thesis, 1995. http://ndltd.ncl.edu.tw/handle/28767400918533420406.
Testo completo國立成功大學
電機工程研究所
83
A field-oriented controlled induction motor enbles decoupling control of touque and flux similar to the control of a seperate- ly excited dc motor. The conventional field-oriented control me- thod, although simple to implement, is sensitive to plant para- meters.Therefore,to solve the problem of performance degradation due to parameter variations and unmodelled uncertainties in a field-oriented controlled induction motor , a robust control scheme is proposed. In this thesis, the plant parameters and un- certainty analysis are estimated by measured data and system identification method. Furthermore, a robust controller is deve- loped by means of H-inf theoretical analysis technique and choosing weighting functions appropriately. As a result , the approach can achieve parameter-insensitive control responses with fast dynamic and robust performance. The effectiveness is verified by simulation and experiment.
Marapally, Prasanth. "Space Vector Controlled PMSM Drive Based on Fuzzy Logic Controller". Thesis, 2017. http://ethesis.nitrkl.ac.in/8943/1/2017_MT_MPrasanth.pdf.
Testo completoHwang, Yeou Yuan, e 黃友元. "A Study of Self-Organized Fuzzy Controller to Improve PID-Controller and Robust-Controller". Thesis, 1999. http://ndltd.ncl.edu.tw/handle/61566220784745251989.
Testo completo國立成功大學
造船及船舶機械工程學系
87
The performance of fuzzy logic controller can be improved though the following methods: the structure of controller , the tuning of parameters and the regulating of control rules。 The last one is the most effective among them。Rules self-regulating fuzzy controller is one of those being able to modify fuzzy automatically。Now we prefer a algorithm to realize the technique of self-organized fuzzy controller to adjust change of error gain。It can control close loop system freely arrive steady state time。The self-organized fuzzy controller is assist controller to improve the performance of a master PID-controller and Η∞ controller and result of computer simulation show that the complex controller(Fuzzy-Η∞ controller or Fuzzy-PID controller) is better than the original PID controller and PID controller no matter in the reduction of rise time , overshoot , or settling time 。
Pillay, Anand. "A DSP-based digital controller for a thyristor controlled series capacitor". Thesis, 2007. http://hdl.handle.net/10413/2245.
Testo completoThesis (M.Sc.Eng.)-University of KwaZulu-Natal, Durban, 2007.
Yang, Hui-tsung, e 楊慧聰. "A Design of Fuzzy Speed Controller for Sensorless Vector-Controlled Inverter". Thesis, 1999. http://ndltd.ncl.edu.tw/handle/82772535234866224635.
Testo completo國立臺灣科技大學
電機工程系
87
The purpose of this thesis is to design a fuzzy PID speed controller based on fuzzy logic theory for a sensorless vector-controlled induction motor drive system. First, the control rule table of numerical value is constructed by using natural control laws. Then, the torque command is calculated according to the speed error and the change of speed error by using fuzzy inference rules. We also propose a speed estimator by the full order state observer based on adaptive control theory. The proposed scheme uses the state observer which can allocate poles arbitrarily. Therefore, it can be applied to the direct field-oriented control, even in a low speed range. Experiments are setup by a PC-based visual module to inverter to evaluate the effectness of the proposed method. The experimental results demonstrate that the fuzzy PID meets a high performance and robust control system. The design of fuzzy controller does not require accurate mathematical model of system, so it is easy to implement.
Lo, Mei-wei, e 羅美薇. "Design of Low-Power Controllers for High-Performance Controller-Datapath Systems". Thesis, 2006. http://ndltd.ncl.edu.tw/handle/20677875777297580448.
Testo completo國立中山大學
資訊工程學系研究所
94
The state assignment is one of the most important problems in hardware implementation of controllers (finite state machines, FSMs). Traditional heuristics include simulated annealing (SA), greedy approach, and recursive Min-Cut partitioning. Since these methods can’t reduce both area and power, thus we propose a new approach which using integer linear programming (ILP) to solve the state assignment. The proposed of ILP approach can set the weight and reach best solution between less area and low power. The approach can find out the best state assignment for both low-area and low power consumption. In addition, we also use ILP to solve the output encoding of controller in order to reduce the power consumption of datapath. Finally, to verify the effectiveness of our proposed approach, we do some experiments on several MCNC FSM benchmarks and controller-datapath systems. The experimental results show that a significant power and area savings can be achieved.
Lee, Meng Chang, e 李孟昌. "Robust Controller and Tracking Controller Design for Uncertain Systems". Thesis, 1995. http://ndltd.ncl.edu.tw/handle/42396732575712272927.
Testo completo逢甲大學
化學工程研究所
83
During the past years, the design problem of the robust controller and tracking controller had important developed for uncertain systems. In this thesis, we present a systematic robust controller and tracking controller design methodology for uncertain process systems described by state space model. First,Based on a Lyapunov function and a Riccati equation, we propose a guaranteed exponential convergent rate robust controller for the case that the parametric uncertainties satisfy the so called matching condition. If there is not the case, i.e. the parametric uncertainties do not satisfy the matching condition, we present a method to detune the robust controller to preserve at least quadratic performance. On the other hand, the robust tracking controller is designed in the sense of feedforward control to track the desire model so that the tracking error is made arbitrary small, and the system is said to practically trackthe input. If there is not the case, i.e. the parametric uncertainties do not satisfy the matching condition, the tracking error cannot be made arbitrary small. Furthermore, we propose an observer-based robust controller for uncertain systems whose states are unmeasurable or unavailable. Finally we apply the proposed controller design strategies to the control of an uncertain gas absorber system.
Shih, Ting-Kuei, e 史廷揆. "Traditional PID Controller-Based Neural Fuzzy PID Controller Design". Thesis, 2010. http://ndltd.ncl.edu.tw/handle/93877397598408370250.
Testo completo中華大學
機械工程學系碩士班
98
This thesis is based on the use of traditional PID controller, then directly extends the results to the fuzzy and Neural Network (NN) PID Controller. Depending on the availability of the system transfer function, traditional PID controller design method is divided into two categories, (1) If the system transfer function is known in advance: this method has three types as: 1. System identification method, 2. Bode diagram method, and 3. Root locus method. The other category is (2), if one has no prior system transfer function, then types methods can be applied: 1. Relay feedback method and, 2. Online adjustment method. The purpose of this thesis is: firstly, by applying these five methods, find the relevant design parameters according to Ziegler-Nichols algorithm to calculate the gain-values of PID controller. The next directly extends the results to the fuzzy and Neural Network (NN) PID Controller. This study is applied to two systems; the first is for a scanning probe control system design. The second is to the fuel cell coupled control system design. For the scanning probe control system design, the first step uses of MATLAB / SIMULINK for building system modeling. Second, look for PID parameters by using three methods (If the system transfer function is known in advance) such as: 1. System identification method, 2. Bode diagram, and 3. Root locus method. Calculate the related parameter values, and then one can obtain the gains of the PID controller according to Ziegler-Nichols algorithm. The next is to extend the results of PID controller directly into Fuzzy PID controller. In addition, the backlash hysteresis effect of the force actuator is also included for comparison. From the simulation results one can see that the performances of fuzzy PID controllers are better for the cases with backlash hysteresis effect, and the one obtained by the system identification method is the best. The second application is for a fuel cell coupled-type control system design. As it is difficult to calculate the transfer function of the coupled control system, so the PID controller is designed without using the system transfer function of the previous methods, while the relay feedback and online adjustment methods are applied. The performance of the PID Controller1 ( =0.6、 =0.7、 =0.175) obtained by the online adjustment method is very good for about 2.5 seconds to reach the steady state. On the other hand, the PID Controller2 ( =0.6、 =0.65、 =0.1625) obtained by the relay feedback method is with output larger overshoot and oscillation, and takes about 7 seconds to reach steady state. However, from the results obtained by the fuzzy controllers, we find that the system responses can quickly reach the steady-states without any over shoot, but there are small ripple effects at the steady-state. In addition, we also apply the membership functions of fuzzy controller to design the Neural Network (feed-forward NN) controller. From the simulation results we can see there are significant overshoots, but the systems reach the steady state quickly without any ripple effects at the steady-state. According to the results from the two application examples, we can see that the fuzzy controllers are better especially if there are backlash hysteresis and parameters variation effects.
Huang, Chi-Wen, e 黃其文. "Suppression of Subsynchronous Resonance Using H∞ Controller of Thyristor-Controlled Series Capacitors". Thesis, 1997. http://ndltd.ncl.edu.tw/handle/64386567651387514804.
Testo completo國立成功大學
電機工程學系
85
This thesis investigates the application of thyristor-controlled series capacitors (TCSC) and robust H∞ control theory on damping enhancement of subsynchronous torsional interactions of a power system containing series-capacitor compensation. The studied power system, i.e., the IEEE Second Benchmark Model, system-s, consists of two sets of nonidentical turbine-generators connected to an infinite bus through a common series-capacitor compensated line. Damping controllers employ shaft speed deviations of the studied generators as feedback signals to generate a damping signal in order to modulate the firing angle of TCSC's thyristors. Frequency-domain approach based on a linearized model and eigenvalue analysis is performed. Time-domain approach based on nonlinear model simulation under torque disturbances, a three-phase fault, and the variation of system operating point is also carried out. The proposed H∞ controller is also further reduced to a second order one for practical application by using order-reduction technique. The simulation results show that the designed H∞ controller can effectively suppress the subsynchronous resonance.
Jair, Ruey-Ynan, e 翟瑞元. "DESIGN OF AN ADAPTIVE SPEED CONTROLLER FOR VECTOR-CONTROLLED INDUCTION MOTOR DRIVES". Thesis, 1998. http://ndltd.ncl.edu.tw/handle/21054910688295177514.
Testo completo中正理工學院
電機工程研究所
86
A systematic design method of PI controller for vector-controlled induction motor drives is investigated in this thesis. In order to deal with the parameter variation of the induction motor and load torque disturbance, a model reference adaptive controller which based on Lyapunov stability theorem is proposed to control the speed of induction motor. The results show that the speed control performance of the adaptive controller is better and more robust than the traditional PI controller. In hardware implementation the actual stator currents and rotor speed signals are used, and the control software is developed on the personal computer by Turbo C program language. The experimental results show good performance for model reference adaptive controller under no-load and loading conditions at various speeds.
Nguyen, Truong-Giang, e 阮長江. "The Study of Optimal–Feedrate Controller for a Computerized Numerical Controlled Machine". Thesis, 2010. http://ndltd.ncl.edu.tw/handle/81108872310929519489.
Testo completo大葉大學
機械與自動化工程學系
98
In this study, the main purpose is to propose an optimal-feedrate controller for a computerized numerical controlled (CNC) machine. The first is to provide a speed-controlled interpolation method based on optimal-feedrate algorithm. The real-time interpolation method was taken full its advantages, the chord error and the difference between the orientation of tangent vector of the curve at current point and previous point were repeatedly checked through the whole interpolation process. If either chord error exceeded the prescribed tolerance or sharp corner was detected, the feedrate in the proposed interpolation method was automatically adjusted in order to confine the chord error within the prescribed tolerance. A parametric curve, determined by the non-uniform rational B-spline (NURBS), was employed to test the feasibility and precision of the proposed interpolation method. The second is to propose a look-ahead linear jerk filter (LALJF) for a CNC machine. Proposed algorithm was constructed in Structured Text program for a Fuji electric’s open programmable logic controller (PLC). For the purpose of ensuring smooth and accurate motion of a tool with a linear jerk change during real-time machining process, the proposed filter was formed by combining a look-ahead algorithm and three modified moving average filters (3MMAF). The look-ahead algorithm performed one look-ahead step-changing speed of the speed curve. The speed command was recalculated and sent to controller of CNC machine based on step-changing speed profile, given maximal acceleration/deceleration, and given maximal jerk. The theoretical and computational aspects of such LALJF are presented together with experimental results from their implementation on a 3-axis CNC machine. A multiple-step-changing speed curve of a CNC machine and a speed curve of a high-speed measurement system were constructed in order to verify the feasibility and precision of the proposed method.
Jain, Jitendra Kumar. "Stability Analysis and Robust Controller Design of Indirect Vector Controlled Induction Motor". Thesis, 2017. http://ethesis.nitrkl.ac.in/9376/1/2017_PhD_JKJain_512EE1010.pdf.
Testo completoObaiah, M. C. "Multiobjective output feedback controller compare with IMC-based PID controller". Thesis, 2014. http://ethesis.nitrkl.ac.in/6293/1/E-73.pdf.
Testo completoLin, Hong-Ming, e 林弘閔. "Baking Controller Design". Thesis, 2017. http://ndltd.ncl.edu.tw/handle/344g27.
Testo completo龍華科技大學
電機工程系碩士班
105
Baking oven function in recent years more and more perfect, in accordance with the needs of consumers to design other functions, No need to opening the oven to do some other deal with batter in the process of baking , easy to use the user simply, easy operation.. In this paper, we design a temperature controller for baking, based on the Z-N tuning method (auto-tunning) in the relay stability shock obtained when the critical gain and oscillation cycle to calculate the PID control parameters, through this set of PID parameters to stabilize the temperature to achieve Bake the purpose of the controller. Compare the functionality of the oven on the market to design the controller interface, plus the existing switch control (sprinkler valves, steam valves, lighting, etc.) to design a user interface ,to achieve the use of convenience and practical.
Ku, Chin-Yung, e 古金永. "CMAC Controller forManipulatorArm". Thesis, 2009. http://ndltd.ncl.edu.tw/handle/18949775624802181387.
Testo completo元智大學
電機工程學系
97
In this thesis, we describe the dynamic robot model, provides the necessary joints and the angle parameters. Based on the PD controller, a CMAC supplement controller is proposed to control the manipulator arm along the track trajectory on the horizontal plane. This controller is compared with a PD controller and a PD controller with backpropagation neural network, to illustrate the merits of stability and tracking performance for the proposed design method.
Ribeiro, Simão Pedro Rocha. "Smart Hydraulics Controller". Master's thesis, 2014. https://repositorio-aberto.up.pt/handle/10216/101443.
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