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Dissertations / Theses on the topic 'Smith Predictor'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Veeramachaneni, Siva Rama Krishna. "Robust PID control using a Smith predictor for time delay systems." Diss., Wichita State University, 2013. http://hdl.handle.net/10057/10617.

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Time delays are unavoidable in many mechanical and electrical systems. The presence of delay typically imposes strict limitations on achievable feedback performance in both continuous and discrete systems. The presence of the delay complicates the design and analysis of a control system as it makes continuous systems infinite dimensional, and it significantly increases the dimensions in discrete systems. This work will propose a method to determine all PID controllers that stabilize the closed-loop system and satisfy weighted sensitivity, robust stability or robust performance constraints for

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2

Holene, Axel Lødemel. "Performance and Robustness of Smith Predictor Control and Comparison with PID Control." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for kjemisk prosessteknologi, 2013. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-23101.

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The performance and robustness of the Smith predictor controller has been tested for first and second order processes with time-delay by comparing with PI and PID control. It was assumed that the performance would obviously be better when the time-delay is known. Pareto optimal PI and PID controller tuning curves has been found. The processes studied is divided between five first-order-plus-time-delay and nine second-order-plus-time-delay models. Performance have been defined as a weighted average of the integrated absolute error for a step load change in input and output disturbances. Robustn

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3

Kaya, Ibrahim. "Relay feedback identification and model based controller design." Thesis, University of Sussex, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.299955.

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Liacu, Bogdan Cristian. "Network-based Haptic Systems with Time-Delays." Phd thesis, Supélec, 2012. http://tel.archives-ouvertes.fr/tel-00771948.

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During the last decades, virtual environments have become very popular and are largely used in many domains as, for example, prototyping, trainings for different devices, assistance in completing difficult tasks, etc. The interaction with the virtual reality, as well as the feedback force, is assured by haptic interfaces. Generally, such systems are affected by communication and processing time-delays, resulting in a deterioration of performances. In this thesis, a complete study of the existing methods, as well as theoretical tools and new solutions, are proposed for the haptic framework. Fir

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5

Brashear, Thomas James. "Analysis of dead time and implementation of Smith Predictor compensation in tracking Servo systems for Small Unmanned Aerial vehicles." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2005. http://library.nps.navy.mil/uhtbin/hyperion/05Dec%5FBrashear.pdf.

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Thesis (M.S. in Mechanical Engineering)--Naval Postgraduate School, December 2005.<br>Thesis Advisor(s): Isaac I. Kaminer, Vladimir N. Dobrokhodov. Includes bibliographical references (p. 37-38). Also available online.

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Martin, Paulo Alexandre. "Modelagem e controle de um trocador de calor feixe tubular." Universidade de São Paulo, 2006. http://www.teses.usp.br/teses/disponiveis/3/3139/tde-27032006-211526/.

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Este trabalho apresenta todo um projeto de um sistema de supervisão e controle de um trocador de calor, desde os ensaios experimentais para a elaboração de um modelo matemático até a implementação do sistema de controle e supervisão em microcomputador. O sistema implementado consiste de um software didático e um sistema de aquisição de dados que irão realizar a supervisão e controle de um trocador de calor tipo casco e tubos. Neste software didático é possível implementar o controle PID e suas variações PI-D e I-PD além de permitir a implementação do sistema de controle adaptativo estrutura ga

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7

Rosén, Anna. "Air/Fuel Ratio Control of an SI-Engine Under Normal Operation Conditions." Thesis, Linköping University, Department of Electrical Engineering, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-2448.

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<p>Emission from cars today is one of the biggest environmental issues, hence stringent government standards have been introduced to decrease emission. Car companies do not only have to satisfy government standards, but also meet consumer demands on increased fuel economy and good drivablility. This report will introduce controllers designed to control the air/fuel ratio in an SI engine. The engine model used is simplified. The engine components modelled include the inlet manifold, fuel dynamics, combustion and exhaust sensor. </p><p>Nonlinearities and delays are inherent in the engine dynamic

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8

Yurk, Jeffrey J. "Assessment of total phosphorus concentration as a predictor and determinant of fishery productivity in southern Appalachian reservoirs: application to Smith Mountain Lake, Virginia." Thesis, Virginia Polytechnic Institute and State University, 1989. http://hdl.handle.net/10919/50103.

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Phosphorus is often the limiting nutrient of primary productivity in southern Appalachian reservoirs, but its impact on higher trophic levels has not been assessed. Regression analysis was used to examine the relationship between total phosphorus concentrations and estimates of fish standing stock in Smith Mountain Lake (SML) over time and for 22 southern Appalachian reservoirs (SAR) at the same time. ln SML, which had responded to a nutrient reduction program, total phosphorus concentration and fish biomass concurrently declined over an 12-year period; phosphorus concentration accounted for o

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9

Romano, Rodrigo Alvite. "Modelagem e controle de CO2 em câmaras de topo aberto utilizadas em estudos de fisiologia vegetal." Universidade de São Paulo, 2006. http://www.teses.usp.br/teses/disponiveis/3/3141/tde-02052006-103459/.

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As atividades sócio-econômicas vêm provocando alterações nocivas ao meio ambiente que atualmente assumem proporções mundiais. Graças à maciça utilização de combustíveis fósseis para a geração de energia e às crescentes práticas de desmatamento e queimadas das florestas, a concentração de dióxido de carbono (CO2) na atmosfera vem aumentando drasticamente. Como este gás é o principal responsável pelo efeito estufa, ele tem grande importância nos estudos e na mitigação do aquecimento global. Para justificar o seqüestro de carbono como um dos caminhos para ajudar na solução deste problema, muitos

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10

Rueda, Bergamino Dante Jesús. "Desarrollo de un predictor de Smith modificado para el control de plantas industriales con retardo de tiempo dominante y sometidas al efecto de perturbaciones externas." Master's thesis, Pontificia Universidad Católica del Perú, 2017. http://tesis.pucp.edu.pe/repositorio/handle/123456789/9752.

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En esta tesis se desarrolla el diseño de un sistema de control basado en un predictor de Smith modificado mediante un compensador anticipatorio, para el control efectivo de plantas con retardos de tiempo dominante y sometidas al efecto de perturbaciones externas. En el capítulo 1 se expone el estado del arte de los sistemas de control de plantas con retardos de tiempo dominante, mostrando las principales contribuciones científicas realizadas en los últimos 30 años abordando la problemática actual. En el capítulo 2 se muestran algunos ejemplos de plantas típicas con retardos de tiempo i

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Suess, Sérgio Ricardo. "Redes IP em aplicações de controle em malha fechada : proposta de estratégias para lidar com o indeterminismo temporal." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2008. http://hdl.handle.net/10183/15741.

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Este trabalho apresenta uma proposta de solução para compensar o atraso variável, característico de redes IP. O preditor de Smith é tradicionalmente usado para compensar atrasos, mas no caso deste tipo de rede um fator importante que pode degradar o controle do sistema são as grandes variações nos atrasos sofridos pelas mensagens. Para tratar este problema, este trabalho baseia-se na criação de uma estrutura de dados de armazenamento para a saída do preditor de Smith, possibilitando a comparação do valor de saída da planta com o valor adequado guardado na estrutura. Para determinação do valor

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12

Parra, Luis Antonio. "Sistema de controle com compensação de tempo morto aplicado à geração de vento em tanque de prova." Universidade de São Paulo, 2013. http://www.teses.usp.br/teses/disponiveis/3/3152/tde-22092014-155323/.

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Este trabalho descreve o desenvolvimento de um sistema de controle com compensação de tempo morto aplicado a um ventilador para simular os efeitos do vento em modelos de embarcações. O sistema é instalado no tanque de provas do Departamento de Engenharia Naval da Escola Politécnica da USP. Um sistema de controle baseado em computador é elaborado para a realização dos testes e validação, procedendo-se inicialmente a identificação do sistema a ser controlado. Na malha de controle, o sinal de referência é a velocidade do vento desejada em uma distância pré-definida do ventilador e pode ser tanto

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13

Faltus, Ivo. "Adaptivní regulátory pro systémy s dopravním zpožděním a jejich porovnání s klasickými pevně nastavenými regulátory." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2013. http://www.nusl.cz/ntk/nusl-219933.

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Master thesis is focused on the philosophy of design adaptive controller. In the theoretic part are described parts of the adaptive controller, which belongs parts as online identification by recursive least-squares method and PSD controller, which can set its parameters according to identified system (use Z-N method). The part of control system with transport delay is situated at the conclusion of the theoretic part, there are focused on Smith predictor. Practical part is focused on verification of all algorithms, which was performed on models and real systems.

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14

Krykorka, Daniel. "Adaptivní regulátory pro systémy s dopravním zpožděním a jejich porovnání s klasickými pevně nastavenými parametry regulátorů." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2016. http://www.nusl.cz/ntk/nusl-221004.

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Master thesis is focused on the philosophy of design adaptive controller. In the theoretic part are described parts of the adaptive controller, which belongs parts as online identification by recursive least-squares method and PSD controller, which can set its parameters according to identified system (use Z-N method). The part of control system with transport delay is situated at the conclusion of the theoretic part, there are focused on Smith predictor. Practical part is focused on verification of all algorithms, which was performed on models and real systems.

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15

Smith, Lisa Price. "Using laboratory measures to predict driving ability in young adults." View electronic thesis (PDF), 2009. http://dl.uncw.edu/etd/2009-1/smithl/lisasmith.pdf.

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16

Mukepe, Kahilu Moise. "Identification and control of wet grinding processes: application to the Kolwezi concentrator." Doctoral thesis, Universite Libre de Bruxelles, 2013. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/209562.

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Enhancing mineral processing techniques is a permanent challenge in the mineral and metal industry. Indeed to satisfy the requirements on the final product (metal) set by the consuming market, control is often applied on the mineral processing whose product, the ore concentrate, constitutes the input material of the extractive metallurgy. Therefore much attention is paid on mineral processing units and especially on concentration plants. As the ore size reduction procedure is the critical step of a concentrator, it turns out that controlling a grinding circuit is crucial since this stage accou

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17

Smit, Colleen. "Prediction of academic success of first year National Certificate Vocational (Level 2) students at FET colleges / by Colleen Smit." Thesis, North-West University, 2013. http://hdl.handle.net/10394/9840.

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Since 2006 Further Education and Training (FET) Colleges have been recapitalised through massive government investment in order to improve infrastructure, implement a more relevant curriculum and assist college learners financially to gain access to the different learning programmes. A new curriculum with 11 programmes was introduced and implemented under the National Certificate Vocational (NCV). The results of the 2007 examinations, were disappointing and in general, the national performance of the learners was dismal. Policy requirements for certification and promotion to the next level sti

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18

LIN, PEI-RONG, and 林佩蓉. "A modified smith predictor for MIMO system." Thesis, 1990. http://ndltd.ncl.edu.tw/handle/28953460571641947963.

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19

JIANG, QING-TANG, and 江慶堂. "A multiloop based multivariable modified smith predictor." Thesis, 1991. http://ndltd.ncl.edu.tw/handle/35208954486938041708.

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20

Ahmad, Zeeshan. "Some Studies On Smith Predictor Based Networked Control System." Thesis, 2013. http://ethesis.nitrkl.ac.in/5234/1/211EE3334.pdf.

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An Networked Control System (NCS) uses real time communication network for closed loop control of systems. It is a class of distributed control system involving information sharing among sensors, actuators, controllers through a communication network. The present work deals with the study and analysis of network delay, packet loss and their effects across the communication channel of an NCS. An User Datagram Protocol (UDP) has been used to establish the communication channel between the two computers in the real time, and hence the network delay and packet loss between them is studied. An UDP

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21

Mohanty, Priyabrata. "Smith Predictor Design in IMC Framework for Integrating Plants." Thesis, 2016. http://ethesis.nitrkl.ac.in/9108/1/2016_MT_PMohanty.pdf.

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PID controllers have been the first and foremost choice of control engineers for their simplicity, ease of application and satisfactory performances. Standard IMC is incapable of taking care of disturbances occurring on the input of plant to overcome this drawback of IMC, a modification is performed on IMC configuration which not only takes care of servo response but also takes care of the regulatory response of the system. Simple methods for tuning this controller is presented in this thesis. The controller structure and the proposed tuning method ensure smooth closed-loop response to servo c

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22

Hsiao, Su-Chun, and 蕭夙君. "The Application of Quantitative Feedback Theory in Smith Predictor Design." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/58967372207761329048.

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碩士<br>國立中正大學<br>化學工程研究所<br>89<br>Time delay, resulting from material and energy transportation lag, measurement delay, etc.,is a common phenomenon in many chemical processes. Another problems in chemical processes were parametric uncertainties. Many design techniques and conventional control algorithms such as PID cannot be directly applied to processes with dominant time delay and uncertainties. However, the Smith predictor is suitable for regulating systems with dominant time delay. The quantitative feedback theory (QFT) is an excellent design technique of uncertain f

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23

Te-hua, Kung, and 孔德華. "Two Degree of Freedom Smith Predictor Design for Long Deadtime." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/62659036207468299356.

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碩士<br>國立臺灣大學<br>化學工程學研究所<br>89<br>Time delay can be found in many chemical engineering processes . But it is a problem which can't be tuned good by PID controller.Smith Predictor can reject time delay in control system,and it really has better performance than original PID controller.But the original one degree of freedom Smith Predictor is not so good for any process if there exists disturbance especially for an integrated process. Many researches have been done to solve the problem.They have proposed structures that ca

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CHEN, PEI-LIN, and 陳佩琳. "A modified smith predictor with an approximated inverse of dead-time." Thesis, 1989. http://ndltd.ncl.edu.tw/handle/11921854345166503486.

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碩士<br>國立臺灣大學<br>化學工程研究所<br>77<br>Smith Predictor ，MAC ，DMC ，IMC ，等控制理論，其設計的理念，均是針對設定點的變化，而未對負荷干擾做任何的處理。而後雖有AP被提出，針對擾動做處理，但其對負荷動態的依賴相當大，實用性不高。本文針對負荷擾動提出一個近似時延補償器，這個近似時延補償器在使用上相當簡便，只須知道Robust stability，Perform- ance，和Bandwidth 三個限制即可設計，不須事先知道負荷動態而能應付各種負荷擾動，甚至當系統有高頻模式誤差或noise 存在時，其均能有效應付。

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Fang, Sz-Jie, and 方思傑. "Time-delay Visual Servoing of Micro Aerial Vehicle with Multi-Model Smith Predictor." Thesis, 2014. http://ndltd.ncl.edu.tw/cgi-bin/gs32/gsweb.cgi/login?o=dnclcdr&s=id=%22103TIT05442127%22.&searchmode=basic.

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碩士<br>國立臺北科技大學<br>電機工程研究所<br>103<br>In a complex control system, time delay usually causes the system unstable and could decrease the efficiency of the system. Contrary to the Remote Control System of visual servoing for a Micro Aerial Vehicles (MAV), vision delay could be the most serious problem. If the scheme of delay compensation is not well designed, MAV would be unstable during the flight. Therefore, time delay compensation would be the most important issues in a remote visual servo control system. This paper proposes a multi-model Smith predictor, in which the feedback loop design is ba

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26

Tseng, Jui-Te, and 曾瑞德. "Smith Predictor and Predictive Disturbance Observer Structure Applied to Measurement Delay of Semiconductor Process." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/9t32cg.

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碩士<br>國立交通大學<br>機械工程系所<br>103<br>In semiconductor manufacturing, after finishing every process, wafer should be sent to the metrology equipment to measure the accuracy of production. It will consume different time to send the wafer to metrology equipment. If measurement delay is too long, it will cause Run-to-Run Controller to be unable to update the recipe immediately. This will then lower the accuracy of the process outcome and affects the yield rate. In this thesis, we use optimal prediction to design PDOB as inner loop, which can predict future stochastic disturbance by using past and curr

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Liu, Chin-Yun, and 劉青雲. "Control continuous time system with time delay based on Smith predictor and doubly coprime factorization." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/28512238105291294354.

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碩士<br>國立交通大學<br>機械工程學系<br>100<br>This thesis presents a new structure which can be applied to stable, unstable, integrating minimum-phase or non-minimum-phase time delay system. This structure is combined modified Smith Predictor and doubly coprime factorization transformer structure: Vidyasagar’s structure. One can use this method to track performance and attenuate disturbance. Furthermore, if there is some uncertainty in the plant, one can deal with Small gain theorem and find a robustness controller to control the plant.

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Chang, Chih-Peng, and 張志鵬. "Control of stable and integrating processes with dead-time based on PDOB and Smith predictor structure." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/10971257948311630919.

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碩士<br>國立交通大學<br>機械工程系所<br>98<br>Significantly the dead-time has a great influence on the stability of systems, which make the process more difficult to control. Therefore, this thesis presents a discrete dead-time compensator to improve the performance and capability of disturbance rejection for dead-time systems. It applied predictive DOB and Smith predictor structure to compensate output delay and input disturbance for stable and integrating plants. The proposed structure consists of two parts: the inner loop and the outer loop. Firstly the PDOB can be designed to reject any kind of determin

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Lin, Guan Yue, and 林冠岳. "The Design of Networked Control Systems Based on Smith Predictor and Support Vector Regression Estimated Delay Time." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/f6vh72.

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碩士<br>國立臺北科技大學<br>電機工程研究所<br>103<br>Due to the rapid development of the Internet, a remote control system is widely brought to the attention. In real situation applications, traditional control is unable to live up to the requirement, so the related research is of great importance. In the transmission process of network control systems, the variation of delay time depends on the number of users and others transmission factors. However, delay time will influence the performance of the network control systems and affect the stability of control system. Smith predictor is designed to be simple, b

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Chen, Jun-Sheng, and 陳俊生. "Development of A Smith Predictor Based Robust H-Infinite Controller and Study of Its Application on Hysteresis Compensation for Piezoceramic Actuators." Thesis, 2000. http://ndltd.ncl.edu.tw/handle/46956763527456088368.

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碩士<br>國立中正大學<br>機械系<br>88<br>Abstract One of the limitations for the piezoactuator to achieve high tracking control accuracy is due to its inherent hysteresis effect. Two precise hysteresis models were developed in the past to describe the hysteresis behavior, however the developed models are highly nonlinear and the controller design based on the models is complicated and time consuming. In this paper, we propose an approximate model using a variable gain and time-delay together with a structural response function to represent the model of the piezoelectric actuator with hysteresi

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Silva, Humberto Araújo da. "Desenvolvimento de um controlador preditivo multi-modelo adaptativo aplicado ao controlo de pressão arterial." Doctoral thesis, 2019. http://hdl.handle.net/1822/65793.

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Tese de Doutoramento em Engenharia Industrial e Sistemas<br>Na grande maioria dos procedimentos cirúrgicos torna-se necessário realizar o controlo da Pressão Arterial (PA) para, com isto, assegurar da melhor forma a saúde do paciente. Para reduzir os riscos de uma complicação, é imprescindível diminuir a PA o mais rápido possível. A infusão contínua de medicamentos vasodilatadores, como é o caso do nitroprussiato de sódio (NPS), reduz de forma rápida a pressão arterial na maior parte dos pacientes. Entretanto, cada paciente possui uma diferente sensibilidade à infusão do NPS. Nestes siste

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Frutuoso, Daniel Gonçalves. "SMITH - Smart MonITor Health system." Master's thesis, 2015. http://hdl.handle.net/10316/35703.

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Dissertação de Mestrado em Engenharia Informática apresentada à Faculdade de Ciências e Tecnologia da Universidade de Coimbra<br>Diabetes is a huge health problem that is a ecting more and more people over the time. When it comes to diagnosing such disease in people, doctors make their diagnoses based on some proper tests and may not take into consideration other factors that are related to the disease. The creation of tools that can analyse information about the current health status of patients can support doctors by providing more information for the diagnosis. Since there is still no

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Chen, Huo-Wen, and 陳穫溫. "Power Control of Cellular Radio Systems via Robust Smith Prediction Filter." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/21078474611678565737.

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碩士<br>國立清華大學<br>電機工程學系<br>90<br>Power control is an important issue in a direct sequence code division multiple access (DS-CDMA) cellular mobile radio system. Higher communication link quality and better system capacity can not be achieved under fading and interference unless an appropriate power control mechanism is employed. In previous research, there is not a good way to treat the round-trip delay and the uncertainties of interferences and noises in the closed-loop power control problem. In this thesis, a robust Smith prediction filter is proposed to efficiently overcome the rou

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