Дисертації з теми "Hydraulic control system"
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Kennedy, Joseph L. Fales Roger. "Force control of a hydraulic servo system." Diss., Columbia, Mo. : University of Missouri--Columbia, 2009. http://hdl.handle.net/10355/6582.
Повний текст джерелаSkjong, 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.
Повний текст джерелаAbdelgayed, Mohamed E. "Design and Control the Ancillary System for Hydraulic Hybrid Vehicle (HHV)." University of Toledo / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1278075678.
Повний текст джерелаHogan, Paul Anthony. "A knowledge-based system for automated fault analysis of hydraulic systems." Thesis, University of Bath, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.332776.
Повний текст джерелаReichenwallner, Christopher, and Daniel Wasborg. "Control of a Hydraulic Hybrid System for Wheel Loaders." Thesis, Linköpings universitet, Fluida och mekatroniska system, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-158902.
Повний текст джерелаKRUTZ, JILL E. "DESIGN OF A HYDRAULIC ACTUATOR TEST STAND FOR NON-LINEAR ANALYSIS OF HYDRAULIC ACTUATOR SYSTEM." University of Cincinnati / OhioLINK, 2001. http://rave.ohiolink.edu/etdc/view?acc_num=ucin990813095.
Повний текст джерелаVotava, Marek. "Realizace řídicího systému pro hydraulický manipulátor." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2009. http://www.nusl.cz/ntk/nusl-228714.
Повний текст джерелаHochwallner, Martin. "On Motion Control of Linear Incremental Hydraulic Actuators." Doctoral thesis, Linköpings universitet, Industriell Produktion, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-142264.
Повний текст джерелаRoddis, Roge. "Evaluation of modern control system design techniques for a multivariable electro-hydraulic system." Thesis, Sheffield Hallam University, 2000. http://shura.shu.ac.uk/20288/.
Повний текст джерелаLu, C. "On-line self-optimisation of an electro-hydraulic servo control system." Thesis, University of Salford, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.381828.
Повний текст джерелаPan, Min. "Active control of pressure pulsation in a switched inertance hydraulic system." Thesis, University of Bath, 2012. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.558871.
Повний текст джерелаWondimu, Nahom Abebe. "SIMULATED AND EXPERIMENTAL SLIDING MODE CONTROL OF A HYDRAULIC POSITIONING SYSTEM." University of Akron / OhioLINK, 2006. http://rave.ohiolink.edu/etdc/view?acc_num=akron1145419922.
Повний текст джерелаFahlén, Daniel, and Ludvig Fri. "Modelling and Control of a Forklift’s Hydraulic Lowering Function." Thesis, Linköpings universitet, Reglerteknik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-139247.
Повний текст джерелаMaterialhantering och logistik är viktigt för att dagens globala samhälle ska fungera. En grundläggande del i materialhanteringsprocessen är gaffeltruckar, därför är det av intresse att göra gaffeltruckar så effektiva och pålitliga som möjligt. I det här examensarbetet har ett försök gjorts till att förbättra styrningen av den hydrauliska sänkningsfunktionen hos en specifik gaffeltruck. Dagens lösning använder sig av öppen styrning vilket gör reglerprestandan känslig för störningar och systemförändringar. En störning av extra intresse är temperaturen av hydraulvätskan. Målet med detta arbete var därför att designa en regulator med ökad robusthet och prestanda. För att lösa detta har en modellbaserad metod för regulatordesign använts där en olinjär gray-box modell härleddes, implementerades och validerades. Modellparametrarna skattades genom att ställa upp och lösa ett ickelinjärt minsta-kvadrat optimeringsproblem. Den resulterande modellen fångar det mesta av systemdynamiken och modellpassningen till uppmätt data var högre än 70\% vilket ansågs bra nog för att kunna använda modellen som en bas för regulatordesign. En PID regulator designades och regulatorparametrarna optimerades med hjälp av modellen. Regulatorn utvärderades i simuleringar och för att sedan implementeras den på en riktig gaffeltruck. Den föreslagna regulatorn jämfördes med den ursprungliga regulatorn i flera olika testfall. Resultaten visade ett bättre steady-state beteende och ökad robusthet mot temperaturförändringar för den designade regulatorn jämfört med den ursprungliga regulatorn.
André, Simon. "Design and Optimization of Controllers for an Electro-Hydraulic System." Thesis, Linköpings universitet, Reglerteknik, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-107620.
Повний текст джерелаZanhar, Andrej. "Modeling, Identification and Control Design for an Electro-Hydraulic Rotator." Thesis, Linköping University, Department of Electrical Engineering, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-54377.
Повний текст джерелаRobotic manipulators have been introduced in industry as a form of increasing productivity. Today, there exist an interest to enlarge the application of these manipulators to outdoor environments. Forestry cranes used in the forestry industry are a clear example. A long term goal in this industry is the development of autonomous systems to increase the logging efficiency. In this thesis, we consider how to control the rotator of these cranes, which is an electro-hydraulically actuated motor, and is used to control the end ffector tool. Control system design for the rotator is a challenging task since the sensing is not available to full extent. The main reason is the harsh environment that these machines are exposed to and sensors such as encoders are very fragile and cannot be used. In this thesis we use alternative sensing devices, such as a magnetic sensor and a stereo camera. In the case of the camera we face a problem with big delay. A prediction method has been used to compute desired values. Due to various reasons certain measuring devices can not be used in the industry. We consider four cases for control system design where dfferent combinations of available sensors have been used. Initially angular position of the rotator is controlled using only the magnetic sensor. A cascade control setup is used where pressure and position are measurable, first using the magnetic sensor and later using the camera. When only pressure measurements are available identified models have replaced sensors for position feedback. All tests and experiments have been done using a scaled version of a real forestry crane. The available crane has similar configuration and dynamics as the real one and is therefor useful for experimental purposes.
Tsai, Chi-Keng. "Computer control of an electro-hydraulic robot leg with proximity ranging system /." The Ohio State University, 1985. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487260135355525.
Повний текст джерелаXu, Yaozhong. "Modelling and control of a high performance electro-hydraulic test bench." Phd thesis, INSA de Lyon, 2013. http://tel.archives-ouvertes.fr/tel-00876661.
Повний текст джерелаZhang, Boya. "Modeling and Analysis of Hydraulic Energy Storage System for Hybrid Locomotives." University of Toledo / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1288815815.
Повний текст джерелаGao, Lingchong, Boyang Shi, Michael Kleeberger, and Johannes Fottner. "Optimal control of the hydraulic actuated boom system based on port-hamiltonian formulation." Technische Universität Dresden, 2020. https://tud.qucosa.de/id/qucosa%3A71119.
Повний текст джерелаEscolano, Andrés Inés. "Knowledge-Based Flight Control System Integration in RAPID." Thesis, Linköpings universitet, Fluida och mekatroniska system, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-113531.
Повний текст джерелаKOWTA, SRINIVAS. "ROBUST STABILITY ANALYSIS OF SERVO-HYDRAULIC SYSTEM IN PARAMETER SPACE." University of Cincinnati / OhioLINK, 2003. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1060970575.
Повний текст джерелаChiang, Mao-Hsiung, Yung-Ching Sung, and Han-Hsiang Liu. "A Study on Integration of Energy Harvesting System and Semi-Active Control for a Hydraulic Suspension System." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-199913.
Повний текст джерелаPomierski, Wojciech. "Position signal filtering for hydraulic active heave compensation system." Technische Universität Dresden, 2020. https://tud.qucosa.de/id/qucosa%3A71095.
Повний текст джерелаPaterson, Alan Stanley. "The development of an expert system to facilitate the synthesis and analysis of hydraulic directional control valves." Thesis, De Montfort University, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.253485.
Повний текст джерелаAzolibe, Ifeanyi. "Architecture of a cyber-physical system for aircraft fuel control systems tests." Thesis, University of Glasgow, 2016. http://theses.gla.ac.uk/8503/.
Повний текст джерелаKoutecký, Vojtěch. "Hydraulický systém regulace vodní turbíny." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2019. http://www.nusl.cz/ntk/nusl-401001.
Повний текст джерелаWang, Meng (Rachel), Per Danzl, Vishal Mahulkar, Damrongrit (Neng) Piyabongkarn, and Paul Brenner. "A hydraulic test stand for demonstrating the operation of Eaton’s energy recovery system (ERS)." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-199521.
Повний текст джерелаAquaro, Matthew. "Systems engineering in practice : the application of systems engineering principles to the development of a hydraulic control system for an automatic transmission." Thesis, Massachusetts Institute of Technology, 2008. http://hdl.handle.net/1721.1/44701.
Повний текст джерелаIncludes bibliographical references (p. 71).
Product development in the automotive industry has evolved around the design of components. The organization is established around components and people have a very component centric perspective on problem solving. This has led to local optimization of individual components, while the larger system spirals out of control. The penalty is often measured in terms of development time and cost. New programs are given autonomy to make independent choices without regard for what other programs are doing, which leads to a wide variety of architectures put into place. Program managers and functional managers have different prioritizations. Furthermore, new designs are provided by a separate organization from the group responsible for implementation. They have a very different value system and are unaware of the difficulties experienced in the implementation phase. This type of practice leads to programs nearing production deadlines with poorly optimized systems. Engineers must relearn due to the lack of standardization across program. The team absorbs additional resources from within to fix issues prior to launch. The robbing of resources leads to delays in subsequent programs and the cycle repeats itself. These issues are partly cultural, part organizational, part due to lack of understanding of systems engineering. A new organization is designed, which strengthen the systems perspective and give power to a new role in the organization, the Systems Engineer. The Systems Engineer is chartered with global optimization of the entire system, which includes both functional aspects as well as business aspects like resource availability, development cost and time. They are responsible for developing the complete system, from concept to final implementation. The Design Structure Matrix (DSM) shows the boundaries of the system and reveals new areas where the Systems Engineer can influence the design at lower cost to the organization.
(cont.) The Robustness Checklist, standardization and Systems Architecture provide Systems Engineers tools to change from a component mindset to a systems mindset and to optimize the system as a whole.
by Matthew J. Aquaro.
S.M.
Comella, Laura [Verfasser], and Thomas [Akademischer Betreuer] Bauernhansl. "Position sensor and control system for micro hydraulic drives in surgical instruments / Laura Comella ; Betreuer: Thomas Bauernhansl." Stuttgart : Universitätsbibliothek der Universität Stuttgart, 2019. http://d-nb.info/1206183993/34.
Повний текст джерелаLammers, Zachary A. "Thermal Management of Electromechanical Actuation System for Aircraft Primary Flight Control Surfaces." University of Dayton / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1399021324.
Повний текст джерелаOliver, Danielle Simonette. "Power Requirements of Control Surface Actuators Towards Active Aeroelastic Control Using the Method of Receptances." Miami University / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=miami159601703575348.
Повний текст джерелаWamalwa, Fhazhil. "Optimal control of a conventional hydropower system with hydrokinetic/wind powered pumpback operation." Diss., University of Pretoria, 2017. http://hdl.handle.net/2263/61549.
Повний текст джерелаDissertation (MEng)--University of Pretoria, 2017.
MasterCard Foundation Scholars Program
Centre of New Energy Systems
University of Pretoria
Electrical, Electronic and Computer Engineering
MEng
Unrestricted
Wang, Chi-Wei, and 王麒維. "Implementation of Hydraulic Servo Control System." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/33627302981614219015.
Повний текст джерела國立高雄應用科技大學
機械與精密工程研究所
101
In this thesis, to stabilize the liquid pressure-controlled in a water cleaning system, planed and designed of a hydraulic servo control system. The control module is based on the microprocessor and planed PC Based the interface of transmission by RS232 to monitor the pressure value and calculated pressurizing pump differential pressure values and transmit control commands to the microprocessor then drive the servo motor to achieve the stable liquid pressure in a hydraulic servo control system. On the PC side, the design is based on the C# to do compare and correct between the target pressure value and servo motor speeds, while the design of the pressure regulator control method allows hydraulic servo control system can be done effectively stable pressure regulator controls the pressure of the entire system sensing component is the use of pressure transmitters, and pressure value is to capture by A/D card. In the simulation, the motion analyzing of a hydraulic servo control system motion based on PID and Fuzzy controller was done by MATLAB/SIMULINK software. On the experiment, we use C# to create a man-machine interface with the RS232 protocol to send control commands, while using pressure transmitters pass back and forth a hydraulic servo control system pressure values, In the hardware configuration, mainly including a pressurizing pump, serial unit, the power conversion unit, I/O hydraulic pressure sensors(transmitters), the DC motor drive unit(drive and speed control). In this thesis we have built a set of hydraulic servo control system presses by reaching a stability to control of purpose, at the same time letting to add to press system can ensure its clean water effect and stabilize water and add the service life of pressing the system. Rise the function of clean water system further because this system considers to add to press fluctuation and long term that the pressuring pump passes in and out water pressure to supervise and control at the same time, can also consequently reach the pipeline pressure of the hydraulic system variation supervision in addition.
Cheng, Chih-Hsien, and 鄭志先. "Tracking Control of Electro-Hydraulic System." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/83761902657725486395.
Повний текст джерела國立高雄應用科技大學
機械與精密工程研究所
97
This thesis presents the derivation, and simulation of a nonlinear tracking control for an electro-hydraulic system, as these devises must often follow prescribed motions. An analysis of nonlinear system equation is used in the derivation of a singular perturbed function that provides for exponentially stable force trajectory tracking. This control law is extended to provide position tracking, and employed hydraulic fluid bulk modulus a difficult to characterize quantity as a parameter. To overcome the difficulty, we have developed a controller design procedure that required no additional sensors, and is robust to variations in the bulk modulus. A dual approach of singular perturbation theory and Lyapunov techniques from the basis for the procedure. The simulation results show that the proposed derivation singular perturbed function and controller design will track a given smooth trajectory with small error.
Chiang, Yu-Lun, and 江宇倫. "Modeling and control of hydraulic linear platform and hydraulic adjustment system." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/8bpa2v.
Повний текст джерелаLai, Chien-Pang, and 賴建邦. "Circuit Realization and Control of Electro-Hydraulic Servo System in Hydraulic Punch." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/rs8dbu.
Повний текст джерела國立勤益科技大學
電機工程系
105
In this paper, the dynamics and control of an electro-hydraulic servo system for a hydraulic press are studied, including modeling, data analysis, optimization of proportional-integral-derivative (PID) control and sliding model control (SMC) and circuit implementation. The electro-hydraulic servo system inside a hydraulic press turns into a nonlinear and unstable system when affected by the nonlinear friction force. In this paper, the system’s motion behaviors are studied through theoretical derivation, modeling and data analysis. Particle swarm optimization (PSO) is also used to determine the optimized PID control parameters that further help control and stabilize the system. Another control method, SMC, is used for comparison. Experimental results indicate that the system can be controlled and its stable periodic motion can be maintained with each of PID and SMC control methods. Finally, the system is implemented with circuit design to verify the feasibility of the experiment, which can be used as reference for future study on an electro-hydraulic servo system for a hydraulic press.
Cheng, Tseng Wei, and 曾偉誠. "The Iterative Learning Control of Hydraulic Cylinder Position Control System." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/19274669396940449270.
Повний текст джерела大葉大學
機械工程研究所
89
The iterative learning control (ILC) learns the unknown information from repeated control operation and can be used as the modification experience for the future control. Hence, ILC controller can make the system tracking error converge to a small region within a limited number of learning trials. This thesis considers the position control problem of a single-rod hydraulic cylinder with proportional valve. We derive its nonlinear mathematical model. However, the accurate system parameters are not easy to find and can''t be used for the controller design directly. Therefore in this study, we use system identification method to estimate the linear system model, and use two-dimensional theory to design ILC controller for the position tracking control of the hydraulic cylinder. We used PID controller and ILC controller in the computer simulation and experiment implementation. The results are analyzed and compared for each controller. Experimental results indicate that ILC controller can effectively handle repetitive trajectory tracking problem, especially in transient response that traditional control method can''t appropriate solve. Therefore, in this application, the control performance of ILC is better than the traditional PID controller.
包志強. "Variable structure control of a hydraulic leveling system." Thesis, 1990. http://ndltd.ncl.edu.tw/handle/88980117145632021949.
Повний текст джерелаHamzehlouia, Sina. "MODELING AND CONTROL OF HYDRAULIC WIND ENERGY TRANSFERS." 2012. http://hdl.handle.net/1805/3365.
Повний текст джерелаThe harvested energy of wind can be transferred to the generators either through a gearbox or through an intermediate medium such as hydraulic fluids. In this method, high-pressure hydraulic fluids are utilized to collect the energy of single or multiple wind turbines and transfer it to a central generation unit. In this unit, the mechanical energy of the hydraulic fluid is transformed into electric energy. The prime mover of hydraulic energy transfer unit, the wind turbine, experiences the intermittent characteristics of wind. This energy variation imposes fluctuations on generator outputs and drifts their angular velocity from desired frequencies. Nonlinearities exist in hydraulic wind power transfer and are originated from discrete elements such as check valves, proportional and directional valves, and leakage factors of hydraulic pumps and motors. A thorough understanding of hydraulic wind energy transfer system requires mathematical expression of the system. This can also be used to analyze, design, and predict the behavior of large-scale hydraulic-interconnected wind power plants. This thesis introduces the mathematical modeling and controls of the hydraulic wind energy transfer system. The obtained models of hydraulic energy transfer system are experimentally validated with the results from a prototype. This research is classified into three categories. 1) A complete mathematical model of the hydraulic energy transfer system is illustrated in both ordinary differential equations and state-space representation. 2) An experimental prototype of the energy transfer system is built and used to study the behavior of the system in different operating configurations, and 3) Controllers are designed to address the problems associated with the wind speed fluctuation and reference angular velocity tracking. The mathematical models of hydraulic energy transfer system are also validated with the simulation results from a SimHydraulics Toolbox of MATLAB/Simulink®. The models are also compared with the experimental data from the system prototype. The models provided in this thesis do consider the improved assessment of the hydraulic system operation and efficiency analysis for industrial level wind power application.
Tsai, Chung-Pin, and 蔡崇彬. "Servo-hydraulic cylinder position control system using neuro- fuzzy control method." Thesis, 1993. http://ndltd.ncl.edu.tw/handle/57005291642867179035.
Повний текст джерелаHsing-YuChen and 陳星佑. "Hydraulic Control System Design for Unmanned Ultra-Light (UUL)." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/38116529483300998496.
Повний текст джерела國立成功大學
航空太空工程學系碩博士班
101
The research and application of an UAV has become more and more widely nowadays. An UAV is generally designed to accomplish certain tasks. However, due to the demand of an UAV with high payload and performance demand, converting an ultra-light aircraft into an UAV is the most feasible and possible way to meet this requirement. This thesis focuses on the design and verification of the unmanned ultra-light hydraulic controlling system. The main problem on voltage stabilization, feedback signal processing and hydraulic valves control are discussed, and solved by including their proportional relationship and reference voltage. All the control programs and electric circuits are integrated into a control board for flight tests. The UUL flight control is finally completely verified with its control capability and maneuverability in flight performance tests.
Hu, Zong-Han, and 胡宗漢. "A Study of Hydraulic System for ProportionalCutter-height Control." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/16050300509390848844.
Повний текст джерела國立臺灣大學
生物產業機電工程學研究所
97
The purpose of this study is to develop an automatic control system for the cutter-height adjustment of tea pluckers. Using Automation Studio design software, the proportional control hydraulic system was simulated on the computer. The characteristics needed by the system were discovered and the feasibility of the system was tested by the simulation. A hydraulic device with a proportional valve was used for the position control. An ultrasonic sensor was also mounted on the system to detect the distance between the cutter on the plucker and the testing surface, like tea tree. A human-machine interface was built using software called Visual Basic 6.0. This interface used a RS-232 port and could receive data from an ultrasonic sensor (SRF05), Then the commands, were be sent to a proportional amplifier through a Multifunction Module called USB-4711. To establish a feedback control system, a personal computer, a proportional control hydraulic system, an A/D and D/A converter and an ultrasonic sensor were combined in this study. The system had accurate dynamic responses to the steady states by the tests with unit-step and square-wave signals. After the experiments with the ultrasonic sensor in the field, this system showed a good height tracing ability.
Wang, Shau-Wei, and 王紹維. "The Compound Controller of Hydraulic Cylinder Position Control System." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/46421650341350114211.
Повний текст джерела龍華科技大學
機械系碩士班
91
In general, a single-rod hydraulic servo system always has some characteristics such as high-degree, nonlinearity, time-variant and asymmetry. It is so difficult to calculate the mathematic model that is not easy to implement the position control of hydraulic servo system by using classical control. To work out a solution, adaptive control has the advantage of on-line tuning the control parameter to achieve a satisfactory performance. In the past research, the neural network rule is used to describe the dynamics of nonlinear systems widely, however, the drawback of slow convergence limits its application. Fast convergence speed of the parameter estimation have been guaranteed because each parameter has its own varying-gain for RLS. In this paper, the compound control algorithm of combining adaptive control, RLS and SNN is proposed for the position control application of a single-rod hydraulic servo system. In the transient state, to use RLS has rapid convergence to advantage. The control parameters can be approximately estimated and converged shortly for transient response. In the steady state, switching to use SNN rule makes the control parameter estimation asymptotically tend to true value and efficiently overcome its asymmetries. Finally, the result shows that the performance of compound control is superior to SNN control for transient and steady state. In addition, the compound control has a good stability in both of gain margin and phase margin.
Lo, Wei-Chi, and 羅偉吉. "Application of Adaptive Hybrid Control for Adymmetric Hydraulic Servo System." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/01958157218124065321.
Повний текст джерела龍華科技大學
機械系碩士班
93
Hydraulic devices have been utilized in the industry extensively. It can provide features on production and modernization for the machinery. In general, close loop control within hydraulic servo system, it contains several instabilities such as high-degree, nonlinearity, time-variant and asymmetry; therefore, mathematical model and location control are not easily established by the conventional controller. With consistent developing on adaptive control theories, those instabilities have been resolved gradually from the last decade. Recently, adaptive control is capable of on-line tuning for control parameters in order to achieve performing satisfaction. In this study, adaptive control theorem has been implemented within close loop control for the hydraulic device incorporating with Lyapunov’s stability theorem and Normalized Algorithms into an integrated adjustable type of adaptive switch. With these initiating achievements on the switch, discuss its own advantages and disadvantages then make comparison between Lyapunov’s stability theorem and Normalized Algorithms.
Cheng, Tun-Jen, and 鄭敦仁. "Neural Network Self-Tuning PID Control For Hydraulic Servo System." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/30272423125943887059.
Повний текст джерела東南科技大學
機電整合研究所
99
The high performance electro-hydraulic servo systems (EHSV) need be applied to modern industry. The modern requirements of parameters variations and operation conditions variations become the new challenges for convention PID controls, which have used to be applied to electro-hydraulic servo systems. This paper is concerned with a new architecture of a self-tuning neural-PID control system and its application to control the displacement of an electro hydraulic servo system. This study proposed the three layers back propagation network to auto tuning the parameters of a conventional PID controller. The cylinder displacement of EHSV investigated by simulations, and simulation results reveal the proposed method is available for the EHSV system, and the appropriate PID control parameters can be on-line tuning by the proposed neural networks.
Lin, Fangcheng, and 林芳正. "Investigations of Control system and Thermal-Hydraulic modeling in PCTRAN." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/56601177843256355459.
Повний текст джерела國立清華大學
工程與系統科學系
91
ABSTRACTS PCTRAN is a reactor transient and accident simulation software program that operates on a personal computer. It was developed by Taiwan Power Company and Micro-Simulation Technology (MST). PCTRAN have high resolution color display and interactive control capability enable versatile, high speed simulation, yet low cost transient simulation. We can use it to simulate various transients and events in order to assess the safety of nuclear power plants. In the present thesis, we will descriptive all of the PCTRAN model structure that it is include source code, VB interface and the data base structure correlation. We also detail investigations into PCTRAN system control blocks. Due to the fact that PCTRAN can not include all of the plant systems and transient initiation events, the operator should be familiar with plant basics in order to complete a reasonable and logical PCTRAN simulation run with its built-in existing functions. Under current basic PCTRAN structures, we can add or modify necessary VB objects and source codes to develop a proper tool for transient analysis in a nuclear power plant.
Heyns, Louis Jacobus. "Describing function-based control synthesis for a nonlinear hydraulic drive system." Thesis, 2014. http://hdl.handle.net/10210/9688.
Повний текст джерелаExperimental tests have indicated that limit cycles are likely to occur in hydraulic drive systems, where backlash in the actuator seals is the dominant nonlinearity'. This study primarily deals with the analysis and synthesis of existing hydraulic drive systems to eliminate limit cycles and with establishing a design tool for the design of hydraulic drives with the object of avoiding limit cycles. Most analytical results were verified experimentally. The most general methods for the design of practical nonlinear systems are discussed. It is concluded that some form of synthesis and analysis is necessary, and that the need exists for general methods to evaluate the stability of nonlinear systems and design tools for nonlinear system design. Ageneral procedure of system analysis is given. Amathematical model of the system needs to be obtained, which can be done with the aid of bond graphs. Simulations of complex systems are recommended to verify system performance only. The first procedure of system analysis that should be followed is to systematically identify elements of the system which are not related to the cause of the limit cycle. Experimental testing is a good first step in identifying the non-critical elements. Signal flow diagrams enable the engineer quickly to determine all feedback loops of a complicated system which might be critical. Block diagrams are necessary for the application of nonlinear analysis and synthesis techniques. Hydraulic resonance, where the actuator seal acts as an oscillating mechanism, is identified as a possible cause of the limit cycle. An unusual application of the describing function, where the describing function is applied to optimize the hydraulic supply, is discussed. The transfer function of flow in a hydraulic pipe is given. With the use of the describing function, the gain margin can be studied versus different parameters of the plant. This gives insight into slightly damped conditions of the hydraulic supply that might be the cause of a limit cycle in the system. A control gain does not change the dynamic behaviour of the hydraulic supply, but only amplifies certain natural modes of the system. The design application of the describing function to nonlinear hydraulic drives is discussed. Procedures to eliminate an existing limit cycle and to design a nonlinear hydraulic drive system are proposed. Most important of all, is to design the system so that the natural frequencies of the mechanical structure and the hydraulic supply do not have any common multiples.
KE, NAIN-PING, and 柯念平. "The application of model reference adaptive control to a solenoid valve control hydraulic system." Thesis, 1986. http://ndltd.ncl.edu.tw/handle/07506625624831936797.
Повний текст джерелаXu, Kang. "Thermal and hydraulic modeling and control of a district heating system." Thesis, 2012. http://spectrum.library.concordia.ca/975015/1/Xu_MASc_S2013.pdf.
Повний текст джерелаJIANG, JIH-KAI, and 江繼開. "A Study on Hydraulic Servo Position Control System with Hybrid Controller." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/11719570726680477222.
Повний текст джерела逢甲大學
自動控制工程所
92
It is difficult to achieve efficient control time variable and nonlinear hydraulic system with conventional PID controllers. A novel fuzzy PID controller and a fuzzy logic parameter regulator are presented in this paper for design and apply to plant of position control. The emphasis is mainly on the tracking performance. For such a reason, an advanced method to improve the tracking accuracy with low pass filter. In general, the actual electro-hydraulic servomechanism will usually have an unavoidable operating delay time in the solid valve. This may sometimes cause close-loop instability if it was not treated carefully in the control system designs. Therefore, in the proposed control system, an adaptable wavelet network compensator used to compensate for the reduced time delay. In order to realize the proposed design and to evaluate the performance in practical applications, there is construct NI LabVIEW and DAQ card for a high-speed simulation platform with real-time capability. The SIMULINK simulation environment accompanied by LabVIEW Simulation Interface Toolkit(SIT)software package will used as a simulation platform on which a plant under controlled is constructed. Both simulation and experimental results are provided to show the effectiveness of the proposed method. .