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1
Шевченко, Сергій Андрійович. "Удосконалення пневмосистеми запуску ракетних двигунів шляхом стабілізації тиску робочого тіла та поліпшення її динамічних характеристик". Thesis, НТУ "ХПІ", 2017. http://repository.kpi.kharkov.ua/handle/KhPI-Press/29030.
Повний текст джерелаАнотація:
Дисертація на здобуття наукового ступеня кандидата технічних наук зі спеціальності 05.05.17 – гідравлічні машини та гідропневмоагрегати. – Національний технічний університет "Харківський політехнічний інститут". – Харків, 2017.
Дисертація присвячена дослідженню вдосконаленої пневмосистеми багаторазового запуску маршового рідинного ракетного двигуна верхнього ступеня ракети-носія. Система запуску, яка містить частину пневмоблока двигуна, здійснює розкручування турбонасосного агрегату за рахунок подачі стисненого гелію на його турбіну. Особливістю системи є використання регулятора тиску гелію із пневмокеруванням. Розроблений й реалізований у практиці проектування новий комплекс дискретно-континуальних математичних моделей для газодинамічного розрахунку цієї пневмосистеми, а також аналізу сил тертя й витоків газу у фторопластових манжетних ущільненнях регуляторів. Запропоновано новий розрахунковий метод дослідження пневмосистеми, що проектується, на динамічну стійкість. Досліджені газодинамічні характеристики металлорукава. Розроблено нову концепцію й впроваджено конструкцію лабораторного стенда, що дозволяє економити гелій при доводочних випробуваннях системи. Виконано розрахунково-експериментальне дослідження пневмосистеми, а його рекомендації зі зміни параметрів регулятора, що знижують коливальність і поліпшують інші динамічні характеристики, впроваджені на двигуні.The thesis for the scientific degree of the Candidate of Technical Sciences by specialty 05.05.17 – hydraulic machines and hydropneumatic units. – National Technical University "Kharkiv Polytechnic Institute", Kharkiv, 2017. The dissertation describes research of perfected pneumatic starting system of a main restartable liquid-propellant rocket engine destined for a launch vehicle upper stage. The starting system, which structure includes a part of the engine pneumatic unit, performs turbopump spin-up by supplying compressed helium to its turbine. A feature of the system is application of a pneumatically controlled helium pressure regulator. New complex of discrete-continual mathematical models is developed and implemented in the designing practice for the gas-dynamic analysis of this pneumatic system and analysis of friction forces and gas leaks through fluoroplastic lip-type seals of regulators. New computational method is proposed for the developed system’s dynamic stability research. The gas-dynamic characteristics of a metal hose are researched. New concept of the laboratory stand is developed and implemented to enable helium saving at development tests. Experimental-computational research of the pneumatic system is performed, recommendations of which are introduced into the engine in relation to the regulator parameters reducing oscillations and improving other dynamic characteristics.
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Шевченко, Сергей Андреевич. "Усовершенствование пневмосистемы запуска ракетных двигателей путём стабилизации давления рабочего тела и улучшения её динамических характеристик". Thesis, Государственное предприятие "Конструкторское бюро "Южное" им. М. К. Янгеля", 2017. http://repository.kpi.kharkov.ua/handle/KhPI-Press/29036.
Повний текст джерелаАнотація:
Диссертация на соискание ученой степени кандидата технических наук по специальности 05.05.17 – гидравлические машины и гидропневмоагрегаты. – Национальный технический университет "Харьковский политехнический институт". – Харьков, 2017.
Диссертация посвящена исследованию усовершенствованной пневмосистемы многократного запуска маршевого жидкостного ракетного двигателя верхней ступени ракеты-носителя с насосной подачей компонентов топлива в камеру сгорания. Система запуска, в состав которой входит часть пневмоблока двигателя, осуществляет раскрутку турбонасосного агрегата за счет подачи сжатого гелия из шаробаллона на турбину. Особенностью системы является использование регулятора давления гелия с пневмоуправлением. Исследованная система обеспечивает пять включений двигателя РД861К при идентичных импульсах давления подачи газа, имеющих прямоугольную вершину и предельно крутые фронты. Разработан и использован в практике проектирования новый комплекс дискретно-континуальных математических моделей для газодинамического расчета этой пневмосистемы, а также анализа сил трения и утечек газа во фторопластовых манжетных уплотнениях регуляторов. В моделях учтены новые эффекты: теплообмен газа со стенками полостей и трубопроводов; инерционность газа при его выпуске из баллона; фактор сжимаемости гелия; нагрев гелия при дросселировании; проникновение уплотняемого давления в зазор между манжетой и стенкой, и ряд других. После чего отклонение расчетных значений давления газа от результатов огневых испытаний составило менее 1% Создана и реализована расчетная методика исследования пневмосистемы на динамическую устойчивость и автоколебания. В методике использованы уточненные результаты гармонической линеаризации для колебаний расхода газа через дроссель и силы трения в манжете, а также новый метод расчета импеданса разветвленной системы трубопроводов. Выведено трансцендентное уравнение для частот и амплитуд свободных нелинейных колебаний системы и предложены методы его решения. Точность определения частот автоколебаний составила 2%. Получены аналитические соотношения для параметров пневмосистемы, обеспечивающие динамическую устойчивость или автоколебания малой амплитуды. Исследованы газодинамические характеристики металлорукава, используемого в дренажной системе лабораторного стенда для исследования и настройки системы. Разработана новая концепция и внедрена конструкция стенда, позволяющая экономить гелий при доводочных испытаниях системы. Выполнено расчетно-экспериментальное исследование системы, а его рекомендации по изменению параметров регулятора, снижающие колебательность и улучшающие другие динамические характеристики, внедрены на двигателе.The thesis for the scientific degree of the Candidate of Technical Sciences by specialty 05.05.17 – hydraulic machines and hydropneumatic units. – National Technical University "Kharkiv Polytechnic Institute", Kharkiv, 2017. The dissertation describes research of perfected pneumatic starting system of a main restartable liquid-propellant rocket engine destined for a launch vehicle upper stage. The starting system, which structure includes a part of the engine pneumatic unit, performs turbopump spin-up by supplying compressed helium to its turbine. A feature of the system is application of a pneumatically controlled helium pressure regulator. New complex of discrete-continual mathematical models is developed and implemented in the designing practice for the gas-dynamic analysis of this pneumatic system and analysis of friction forces and gas leaks through fluoroplastic lip-type seals of regulators. New computational method is proposed for the developed system’s dynamic stability research. The gas-dynamic characteristics of a metal hose are researched. New concept of the laboratory stand is developed and implemented to enable helium saving at development tests. Experimental-computational research of the pneumatic system is performed, recommendations of which are introduced into the engine in relation to the regulator parameters reducing oscillations and improving other dynamic characteristics.
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Filipp, Kratschun [Verfasser]. "Transient Pneumatic System Simulation / Kratschun Filipp." Düren : Shaker, 2020. http://d-nb.info/1213472571/34.
Повний текст джерела
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Bromley, II Michael William. "Pneumatic Particulate Collection System Analysis and Design." Thesis, Virginia Tech, 2012. http://hdl.handle.net/10919/33562.
Повний текст джерелаАнотація:
A pneumatic particulate collection system harnesses the energy associated with the release of a compressed gas to transport particulate to a collection chamber. In an effort to improve the efficiency of a previously designed collection system, high speed imaging in conjunction with computational fluid dynamics (CFD) was utilized to highlight design deficiencies. Areas of recirculation within the collection device as well as impingement of the sampling surface were observed through the testing and CFD analysis. The basis of the improved collection system was conceived through research of pneumatic transport and the deficiencies found through testing and simulation. An improved rectangular-duct-styled system was designed in three main stages. A variety of filters used to contain the desired particulate were characterized through testing for use in simulations as well as fluids calculations. The improved system was then analyzed utilizing compressible and incompressible flow calculations and design iterations were conducted with CFD to determine the final parameters. The final design was simulated with a multiphase flow model to examine the particulate entrainment performance. The improved collection system efficiently expanded and developed the gas flow prior to the collection area to employ the particulate entrainment process. The final design was constructed with an additive manufacturing process and experimentally tested to validate the simulations and flow calculations. The testing proved that the final design operated purely on particulate entrainment and collected only the top layer of particles as simulated. The improved collection system eliminated all areas of flow recirculation and impingement of the particle bed to provide a more efficient sampling device.Master of Science
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Birk, Wolfgang. "Multivariable control of a pneumatic conveying system." Licentiate thesis, Luleå tekniska universitet, Signaler och system, 1999. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-17648.
Повний текст джерелаАнотація:
This licentiate thesis deals with a multivariable controller of a pneumatic conveying system. The industrial process used to illustrate design, analysis and implementation of a multivariable controller is the injection of fine coal into a blast furnace. In the blast furnace process, coke is replaced by fine coal because of economical and environmental reasons. The coal mass flow to the blast furnace becomes a crucial parameter for its operation and hence a control system should be in place to maintain a constant flow. An optimal multivariable linear-quadratic controller has been designed in order to replace the conventional PI-controllers, which were not able to reach the desired control objectives. The design is analyzed by deriving the sensitivity functions of the closed loop system to noise, disturbances and uncertainties. The multivariable controller is then validated through experiments and test operation at the coal injection plant at SSAB Tunnplåt AB in Luleå, Sweden. The reached performance improvements compared with the conventional PI-controllers account for up to 80%. Finally, the controller is combined with a gas-leakage detection system to the commercially available product SafePCI, which is now installed and in operation at SSAB Tunnplåt AB in Luleå, Sweden.Godkänd; 1999; 20061025 (ysko)
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Bachmann, Ryan. "On the dynamics of a pneumatic positioning system." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp05/mq20605.pdf.
Повний текст джерела
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Le, Minh-Quyen. "Development of bilateral control for pneumatic actuated teleoperation system." Phd thesis, INSA de Lyon, 2011. http://tel.archives-ouvertes.fr/tel-00717743.
Повний текст джерелаАнотація:
The aim of this thesis is to investigate the development and control of electro-pneumatic actuators in a haptic teleoperation system. For controlling the mass flow rate of such actuators, two types of valve technology are sudied, i.e. solenoid (on/off) valve and proportional servovalve. The servovalves have found widespread applications in which high accuracy of force/position control are needed. They are however typically expensive due to the requirements of high-precision manufacturing. Therefore, the low-cost solenoid valves can be an alternative to the servovalves for achieving acceptable-performance pneumatic control. Generally, the highly nonlinear of the pneumatic actuator is heightened when it uses on/off solenoid valves instead of servovalves. In this case, precise control is challenging due to the discrete-input nature of the system. Our first objective is to demonstrate that it is possible to design an acceptable performance teleoperation system using master-slave robots that have pneumatic actuators equipped with only inexpensive on/off solenoid valves. To control efficiently the switching valves, several control approaches have been proposed, namely pulse width modulation (PWM), hybrid algorithm, and sliding mode control. A hybrid control theory, which includes more switching control modes, than PWM, allows to reduce the chattering problem and improve the energy consumption of the valves. Another strategy (i.e. a sliding mode control), which does not depend on the pneumatic model, is proposed. This control stratgy allows to perform not only the transparent analysis but also the stability analysis. In order to improve the dynamic performance and reduce the chattering problem in solenoid valve actuated pneumatic teleoperation systems, a five-mode sliding control scheme has been used, which can be considered as an extension of the three-mode sliding controller. Our study demonstrates that by increasing the number of possible control actions for the valves, we can reduce the valves' switching activities, hence improving the valve's life times at no cost to teleoperation transparency. The second objective of the thesis involves in implementing the proportional servovalves on the pneumatic teleoperation system. A comparison related to the teleoperation performance between an on/off valve and a servovalve is carried out. In experiments, it is observed that with the bilateral teleoperation architecture employing solenoid valves or servovalves, satisfactory force and position tracking between the master and the slave is obtained. In bilateral teleoperation control, force sensors are often omitted to save cost and to lessen weight and volume. Therefore, another aspect of our work consists in using observers for an estimation of operator and environment forces. Experimental results show that acceptable teleoperation transparency based on a simple Nicosia observer and a tangent linear control approach can be achieved.
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KUHNER, GUILHERME SESTO. "DIGITAL CONTROL OF A PNEUMATIC POSITIONING SYSTEM FOR BIOMAGNET MEASUREMENTS." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 1996. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=9376@1.
Повний текст джерелаАнотація:
Este trabalho apresenta uma solução para o problema de
posicionamento automático preciso de um corpo em um plano
horizontal, atendendo à restrição de não gerar campo
magnético significativo junto ao objeto a ser posicionado.
A motivação do trabalho reside na necessidade, por parte
do Laboratório de Supercondutividade Aplicada e Magnetismo
(LSAM) do Departamento de Física, de um posicionador para
experimentação em magnetocardiografia.
Inicialmente são discutidas as tecnologias de
automação aplicáveis ao problema, justificando-se a opção
por um sistema pneumático de atuação. O sistema posicionar
montado é então descrito em profundidade, abordando-se os
aspectos relacionados à geometria do problema em questão,
materiais, montagens mecânicas e o sistema de controle
digital.
A seguir é apresentada uma abordagem matemática
para o problema de controle de posição em malha fechada,
visando à definição de uma lei de controle aplicável ao
caso em estudo. Alguns resultados analíticos são obtidos
para controle de sistema caracterizados por atrito
Coulombiano, ao mesmo tempo em que se desenvolve um modelo
para simulação numérica da dinâmica de movimento do
posicionador. Com base nestas duas ferramentas, é
apresentada uma discussão sobre a aplicabilidade dos
controladores da família PID ao caso específico
considerado. Por fim, resultados reais obtidos com a lei
de controle proposta são comparadores aos resultados
simulados, mostrando-se a validade e a utilidade do modelo
teórico.This thesis presents a solution or the problem of automatic precise positioning of na object in the horizontal plane, not generating any significative magnetic field in the region close to the object to be positioned. The study presented was developed as part of an effort to fulfill a necessity for a positioning system for magnetocardiography experimentation in the Magnetism and Applied Supercondutivity Laboratory of the Departament of Physics of this University. A discussion over applicable automation option is presents, along with a justification for a choice of a pneumatic actuating system. The whole precise positioning assembly is described in detail, including subjects such as movement geometry, material, mechanical structures and the digital control system. A mathematical study of the closed of the closed loop position control problem is then developed, aiming to define a control algorithm applicable to the problem. Algebraic analysis is used to describe the influence of Coulomb friction over the equations of motion of a proportional position control system, while a model for simulations experiments of the assembly´s positioning dynamics is developed. These tools are used as the basis for a discussion over the applicability of the PID controlers in the case in study. Moreover, the behavior of the proposed algorithm is recorded and compared to the results of the simulations, showing the correctness and the utility of the theoretical analysis.
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Rahim, R. Abdul. "A tomographic imaging system for pneumatic conveyors using optical fibres." Thesis, Sheffield Hallam University, 1996. http://shura.shu.ac.uk/20259/.
Повний текст джерелаАнотація:
This thesis presents an investigation into the application of optical fibre sensors to a tomographic imaging system. Several sensing mechanisms for measurement using non-intrusive techniques are discussed and there relevance to pneumatic conveying discussed. Optical systems are shown to be worthy of investigation. The optical sensor is modelled to predict the expected sensor output voltage profiles arising from different, artificially produced flow regimes. These artificial flow regimes are created by placing a shaped obstruction inside a gravity drop conveyor in the path of the flowing solids. It is shown that for two arrays, each consisting of sixteen transducers, approximately 30% of the measurement volume is sampled. An image reconstruction method for optical tomography is described, based on the back projection between view lines algorithm. The design of the optical tomography system is described, with emphasis on preparation of the ends of the optical fibre, beam collimation and design of the transmitter and receiver circuits. The optical sensors are evaluated singly and as a tomographic array. Results relating to concentration measurement are presented for solids flow using sand with a mean of 300 micron and plastic beads of 2 mm nominal diameter. Measurements were made with a single optical sensor using the gravity flow rig. The results demonstrate the suitability of the optical sensor for concentration measurement for lightly loaded flows (up to approximately 2% solids by volume in the test). The test is extended to all thirty-two sensors using a range of solids mass flow rates from 40 to 320 gm/s with both dry sand and plastic beads over a range of artificially created flow regimes. The results obtained by comparing the measured and predicted flowrates show good general agreement. The statistical parameters for the error of the sand flow measurement have been calculated as having a mean of 6.76% and standard deviation of 3.94% and for plastic beads is 5.43% and standard deviation of 0.21%. The results also demonstrates that the system is reasonably independent of flow regime and so the optical fibre system is suitable as a concentration meter. Back projection is used to generate tomographic images as an alternative representation of the data on concentration measurement. This provides a visual representation of optical density (concentration) information which is not obvious from the concentration measurements. Results from experiments on particles with different sizes are presented. The results are analysed using frequency spectrum techniques and shown to be dependent upon the particle size for approximately spherical particles with diameters between 600 |im and 5 mm. Suggestions for further work on optical fibre sensors and optical fibre tomographic measurements are made.
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Lorente, Zamora Joanes, and Aguirrezabala Gorka Sorarrain. "Modelling and emulation of industrial electric, pneumatic and hydraulic system." Thesis, Högskolan i Skövde, Institutionen för ingenjörsvetenskap, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:his:diva-16053.
Повний текст джерелаАнотація:
In recent years, the University of Skövde (HiS) is carrying an advance research in Virtual Commissioning and Emulation. The main goal of the research is to test and verify the control logic of an industrial system virtually before implementing it in the real industry. Literature shows how higher modeling detail level is needed taking into account aspects such as geometry, kinematic, behavior and interfaces. That makes an interesting branch of research for the university and that is the reason why the university is focusing on creating models in component level, where a complete emulation data model is being expanded. The aim of this thesis is to develop a way of modelling electric, hydraulic and pneumatic connections in order to create independent models that can be connected between them for creating systems. Furthermore, an energetic analysis of the system has been done. In the first part of the thesis, a frame of reference and a literature review has been done in order to learn about the fields that the authors are going to work. After that, the simulation models of different electric, pneumatic and hydraulic components have been created with a method, inspired by the producer/consumer concept, which provides a generic solution that allows energy flow in different domains between components in a simple way. Then, different component simulation models have been connected in order to emulate more complex systems. Once the models are done, there have been some test in order to know if all perform as expected. Finally, a discussion of the failures which have been during the project have been done. The experiments done have shown that the proposed and then implemented system has fulfilled all the objectives, unlocking the next step of the emulation development.
11
Couch, Michael Robert. "Pneumatic Particulate Collection System for an Unmanned Ground Sampling Robot." Thesis, Virginia Tech, 2010. http://hdl.handle.net/10919/35913.
Повний текст джерелаАнотація:
The design of unmanned material collection systems requires a great deal of foresight and innovative design on the engineerâ s part in order to produce solutions to problems operators may encounter in the field. In this thesis, the development of a particulate collection system for use onboard a lightweight, helicopter deployable ground robot is presented.
The Unmanned Systems Laboratory at Virginia Tech is developing a ground sampling robot to be carried in the payload pod of a Yamaha RMAX unmanned aerial vehicle. The robotâ s ultimate objective is to collect material samples from a hazardous environment. The pneumatic system presented here is a novel design developed to collect particulate without draining the resources of the robot. Vacuum samplers have been developed in the past, but they are large and cumbersome and require large amounts of electrical energy to operate. The pneumatic particulate collection system utilizes the kinetic energy from the release of compressed air to transport the particulate to a collection chamber.
Consideration is given to the drop in pressure of the air supply tank as it empties, and a feasible air supply tank design is presented. Two forms of particulate collection are investigated experimentally: jet impingement and particle entrainment (i.e. steep attack angle and parallel flow). Turbulent, free jet characteristics and critical velocities of particles are studied. Ultimately, a final design is presented that effectively collects particulate material from the top 5/8â layer of both thick and thin particle beds.Master of Science
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Gerschutz, Maria J. "Dynamic Pneumatic Muscle Actuator Control System for an Augmented Orthosis." Wright State University / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=wright1210286543.
Повний текст джерела
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Thomas, Michael Brian. "Advanced servo control of a pneumatic actuator." Connect to this title online, 2003. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1070373448.
Повний текст джерелаАнотація:
Thesis (Ph. D.)--Ohio State University, 2003.Title from first page of PDF file. Document formatted into pages; contains xix, 222 p.; also includes graphics (some col.) Includes bibliographical references (p. 215-222). Available online via OhioLINK's ETD Center
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Boyd, Matt S. "Further Development of a Pneumatically Powered Motion System for a High-Speed Scanner." Thesis, Georgia Institute of Technology, 2004. http://hdl.handle.net/1853/5224.
Повний текст джерелаАнотація:
This paper details the redesign of a previous pneumatic motion system for a linear scanner to meet higher performance requirements. The previous design featured a scanner head, two air bearings, and two pneumatic cylinders and was intended to propel the scanner head back and forth in a linear motion at speeds up to 5 m/s. Air was supplied to the air bearings by tethering the scanner head to an air supply with plastic tubing. At speeds nearing 5 m/s, the tether began to oscillate violently and the repeated impacts of the scanner head and pneumatic cylinders caused the entire structure to vibrate. Also, large amounts of energy were lost due to momentum transfer between the scanner head and cylinders and friction within the cylinders themselves. Further, none of the energy of the impact was recovered.
These problems were corrected by designing and purchasing new equipment and slightly altering the operation of the scanner. A system of needles was designed to provide air to the air bearings without the use of a tether. New pneumatic cylinders with exceptionally low friction were purchased and a method of precharging the air on the rod sides of the cylinders to a certain pressure was devised to add energy back into the system that is lost during operation. A special valve was designed to accomplish the addition of air into the precharge volumes. Also, a mechanism was designed to greatly minimize the vibration of the table. This structure consists of a large, suspended, inertial mass which holds the pneumatic cylinders so they are not actually mounted on the table which holds the scanning track.
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Plodpradista, Wisuwat. "Study of tubular linear induction motor for pneumatic capsule pipeline system /." free to MU campus, to others for purchase, 2002. http://wwwlib.umi.com/cr/mo/fullcit?p3052209.
Повний текст джерела
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Wang, Yi. "MRI-Compatible Pneumatic Actuation Control Algorithm Evaluation and Test System Development." Digital WPI, 2010. https://digitalcommons.wpi.edu/etd-theses/1041.
Повний текст джерелаАнотація:
"This thesis presents the development of a magnetic resonance imaging (MRI) compatible pneumatic actuation test system regulated by piezoelectric valve for image guided robotic intervention. After comparing pneumatic, hydraulic and piezoelectric MRI-compatible actuation technologies, I present a piezoelectric valve regulated pneumatic actuation system consisted of PC, custom servo board driver, piezoelectric valves, sensors and pneumatic cylinder. This system was proposed to investigate the control schemes of a modular actuator, which provides fully MRI-compatible actuation; the initial goal is to control our MRI-compatible prostate biopsy robot, but the controller and system architecture are suited to a wide range of image guided surgical application. I present the mathematical modeling of the pressure regulating valve with time delay and the pneumatic cylinder. Three different sliding mode control (SMC) schemes are proposed to compare the system performance. Simulation results are presented to validate the control algorithm. Practical tests with parameters determined from simulation show that the system performance attained the goal. A novel MRI- compatible locking device for the pneumatic actuator was developed to provide safe lock function as the pneumatic actuator fully stopped."
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Coimbatore, Subramanian Shankar. "Modeling the pneumatic subsystem of a S-cam air brake system." [College Station, Tex. : Texas A&M University, 2004. http://hdl.handle.net/1969.1/328.
Повний текст джерелаАнотація:
Thesis (M.S.)--Texas A&M University, 2003."Major Subject: Mechanical Engineering" Title from author supplied metadata (record created on Jul. 18, 2005.) Vita. Abstract. Includes bibliographical references.
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Shui, Fang. "Study of an electro-mechanical-pneumatic (master-slave) motion control system." The Ohio State University, 1993. http://rave.ohiolink.edu/etdc/view?acc_num=osu1300980939.
Повний текст джерела
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Giliomee, Christiaan Lambert. "Analysis of a four state switchable hydro-pneumatic spring and damper system." Pretoria : [s.n.], 2003. http://upetd.up.ac.za/thesis/available/etd-01242006-111737.
Повний текст джерела
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Boaz, Robert Dale. "Design of a Pneumatic Baling System for Burley and Flue-cured Tobacco." NCSU, 2008. http://www.lib.ncsu.edu/theses/available/etd-05112008-145659/.
Повний текст джерелаАнотація:
Current tobacco baling technology utilizes hydraulic power to press tobacco into bales. The high system pressures at which hydraulic systems operate pose a risk to workers. Hydraulic systems are costly and hydraulic oil leaks contaminate baled tobacco. A pneumatically driven, vertically oriented, multi-stroke baler was designed as an affordable alternative to current hydraulic balers. Pneumatics was chosen due to the lower system operating pressure and absent risk of tobacco bale contamination. The transmission of power was achieved through a reversible pneumatic gearmotor turning left and right hand acme threaded rods coupled together to form a powerscrew. The plunger was driven by a scissor-jack design and was used to take advantage of the non-linear force response of tobacco. The scissor-jack was driven by acme nuts traveling along the acme rod of the powerscrew. The baler was tested with burley tobacco grown during the 2007 season at the Central Crops Research Station in Clayton, NC. The compressive force and plunger displacement was measured for each bale produced. These readings were used to determine the compressive force as a function of plunger travel and the compressive force as a function of bale density. The baler required 3-4 presses to produce burley bales roughly 42 inches cubed and weighing approximately 500-600 pounds.
21
菅原純 and Jun Sugawara. "Development and applications of a drilling process monitoring system for pneumatic drills." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2002. http://hub.hku.hk/bib/B30409184.
Повний текст джерела
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Sugawara, Jun. "Development and applications of a drilling process monitoring system for pneumatic drills /." Hong Kong : University of Hong Kong, 2002. http://sunzi.lib.hku.hk/hkuto/record.jsp?B25139460.
Повний текст джерела
23
Alt, Raphael, Peter Wintersohle, Hartmut Schweizer, Martin Wollschläger, and Katharina Schmitz. "Interoperable information model of a pneumatic handling system for plug-and-produce." Technische Universität Dresden, 2020. https://tud.qucosa.de/id/qucosa%3A71175.
Повний текст джерелаАнотація:
Commissioning of a machine is still representing a very challenging operation and most steps are still executed manually by commissioning engineers. A future goal is to support the commissioning engineers and further automate the entire integration process of a newly installed system with a minimum of manual effort. This use case is known as plug-and-produce (PnP). In this contribution a concept of the Industrial Internet of Things is presented to improve the commissioning task for a pneumatic handling system. The system is based on a service-oriented architecture. Within this context, information models are developed to meet the requirements of PnP to provide relevant information via virtual representations, e.g. the asset administration shell, of the components to the commissioning process. Finally, a draft of the entire PnP process is shown, providing a general understanding of Industrial Internet of Things fluid power systems.
24
Schick, Bastian. "A Digital Test Bench for Pneumatic Brakes." Thesis, KTH, Spårfordon, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-290043.
Повний текст джерелаАнотація:
This master’s thesis covers the structuring and implementation of a digital testbench for the air brake system of freight trains. The test bench will serveto further improve the existing brake models at Transrail Sweden AB. Theseare used for the optimised calculation of train speed profiles by the DriverAdvisory System CATO. This work is based on the research of the technicalbackground, as well as the methodical approach to physical modelling anda modular implementation of the test bench. It gives full flexibility for thesimulation of customised train configurations using the European UIC brakesystem. Train length and vehicle arrangement can be adapted to the user’sspecific needs. For example, the test bench could be used for the simulation ofa train with distributed power. The system parameters are stored in a vehiclelibrary for the convenient generation of train configurations. This vehiclelibrary is freely expandable.The simulation is based on an equivalent electric circuit model which iscompleted with nozzle flow modelling. This model involves monitoring themain pipe, brake cylinder and reservoir pressure. Linear approximation is usedto obtain braking forces for the individual wagons and for the whole train. Thedepiction of the brake system behaviour is mostly accurate in the operationalscenarios, which is validated with measurement data. Additional calibrationis required for further reduction of the simulation errors and an extension ofthe model’s domain of validity. The test bench is developed by incrementaland iterative modelling and prepared for further improvements and variations,for example the adaption to the American AAR system variant.The presented work can also be used as a basis for similar implementationssuch as driving simulators. The methods are transferable to other applicationsof modular simulation.Det här examensarbetet omfattar formgivningen och implementeringen aven digital provbänk för tyckluftsbromssystemet på godståg. Provbänken skaanvändas för att vidareutveckla befintliga bromsmodeller hos Transrail SwedenAB. De används för beräkningen av optimerade hastighetsprofiler förtåg i förarassistanssystemet CATO. Arbetet baserar sig på undersökningenav den tekniska bakgrunden, samt ett metodiskt angreppssätt för fysikaliskmodellering. Verktyget är implementerat på ett modulärt sätt. Provbänkenger full flexibilitet för simuleringen av skräddarsydda tågkonfigurationer somanvänder det europeiska UIC-bromssystemet. Tåglängd och fordonsanordningkan anpassas enligt användarens behov, till exempel för simulering av fördeladtraktion. Systemparametrarna lagras i ett fordonsbiliotek som förenklar inmatningenav tågkonfigurationer. Fordonsbiblioteket kan utvidgas enligt behov.Simuleringen är baserad på en ekvivalent strömkretsmodell, som kompletterasmed modellerad dysströmning. Simuleringen beskriver trycket ihuvudledningen, bromscylindern och förrådsluftsbehållaren. Bromskrafternaapproximeras linjärt efter trycken för de enskilda vagnarna såväl som helatåget. Simuleringen återger beteendet av bromssystemet i alla driftsituationerpå ett verklighetsnära sätt, enligt validering med mätdata från Knorr-Bremse:stestanläggning. Ytterligare kalibrering behövs för att minimera avvikelserna isimuleringen och för att utvidga modellens giltighetsdomän. Provbänken harutvecklats i stegvis modellering och är väl förberedd för vidareutveckling ochanpassning. Ett exempel är anpassningen för att simulera det amerikanskaAAR-bromssystemet.Arbetet som presenteras här är lämplig för användning i liknande applikationer,såsom körsimulatorer. Metoden kan tillämpas allmänt på övrigaanvändningsområden av modulär simulering.
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Messenger, John Arthur. "The design and implementation of a low cost part locating system for the integrated intelligent belt manipulator." Thesis, Georgia Institute of Technology, 1995. http://hdl.handle.net/1853/15955.
Повний текст джерела
26
Eide, Trond Inge. "Modelling and control of a pneumatic starting system for medium-speed gas engines." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for marin teknikk, 2011. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-15796.
Повний текст джерелаАнотація:
This thesis investigates starting systems for marine gas engines. Large combustion engines are usually started by means of pneumatic starting arrangements. The most common ways of starting a combustion engine with compressed air, are to use a pneumatic engine coupled to the engine flywheel, or to inject the air directly into the engine cylinders through a valve in the cylinder air. Pneumatic starting engines are prefered for gas engines with a prechamber. The main challenge related to starting of gas fueled engines, is to avoid ignitable consentrations of gas outside the engine cylinders. Gas engines have an increased emission of unburned gas during starting and stoping. If the consentration of unburnes gases in the exhaust system of the combustion engine gets to large, the gas can be ignited by hot spots or sparks. In addition, we are conserned with the air consume of the starting system. The capacity of the starting system is regulated by class rules. To reduce the cost of the system, we want to reduce the air consume per start. In this thesis, mathematical models of the combustion engine and the starting system are developed and validated against experimental results from starting tests of the real system. The objective is to give means for investigating, by using computer simulations, if the existing starting system can be improved. The validation showed that the model captures the main dynamics of the system. To avoid large concentrations of unburned fuel mixtures in the exhaust system, the starting system is used to purge the engine before allowing fuel to the engine cylinders. In practice, the combustion engine is operated as an air pump which pumps air from the charge air system, via the engine cylinders, and to the exhaust system. A way of improving the safety of the starting sequence by purging the engine for a fixed number of rotations, is proposed. This method gives stricter control of the purged volume, but increases air consume. To reduce air consume, it is advantegous to keep the engine speed low during purging. Three concept for reducing the engine speed are explored. The simulations indicate that the best performance is obtained by using an electrically controlled pressure control valve, in combination with a Proportional-Integral- Derivative feedback controller, to regulate the engine speed. This concept is extensively tested by means of simulations, to evaluate its robustness with regards to system uncertainties and different plant dimensions.
27
Håkansson, Klas, and Mikael Johansson. "Modeling and Control of an Electro-Pneumatic Actuator System Using On/Off Valves." Thesis, Linköping University, Department of Electrical Engineering, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-8754.
Повний текст джерелаАнотація:
To control the exhaust gas recirculation (EGR) and the exhaust brake, the position of a butterfly valve connected to a piston inside a pneumatic cylinder is controlled by altering the pressure inside the cylinder. This thesis evaluates the possibility to do this with pulse width modulation (PWM) controlled On/Off valves. The whole electro-pneumatic actuator system is built out of two On/Off valves and a cylinder.
A mathematical model of the system is constructed. The complete system model on state space form consists of nine states and is nonlinear. The model captures the dynamics of the system. The statics of the system is not captured as accurately. The model is still good enough to be used as aid when developing control strategies, since position feedback is available.
Automatic control strategies for the system are first developed and tested in simulation. The first approach is PID control. Because of the nonlinear properties of the system the results from a PID with a constant proportional part is unsatisfactory. To cope with the nonlinearities, a fuzzy controller is constructed; the results prove somewhat better, but not as good as expected due to implementation difficulties.
In a test bench the system is controlled by a P controller with feedforward from position. The feedforward strongly reduces the nonlinear behavior of the system. With this implementation the results that were hoped for with the fuzzy controller are reached.
28
Iordanou, Harry Nicos. "Continuous versus discrete sliding mode control as applied to a pneumatic positioning system." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape17/PQDD_0005/NQ27830.pdf.
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29
李錦發 and Kam-fat Jonathan Lee. "Design and control of a robotic manipulator with an active pneumatic balancing system." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1992. http://hub.hku.hk/bib/B31210429.
Повний текст джерела
30
Hsu, Chien-Wei, and 許健緯. "CCD Based Pneumatic Isolation System." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/52341049891564721515.
Повний текст джерелаАнотація:
碩士國立臺灣科技大學
機械工程系
97
The thesis is mainly to use experimental methods to evaluate the feasibility of vision-based singe-axial and double-axial pneumatic isolator control systems. In the experiments ，the photo vision of CCD Camera can be transformed for position measurement. In general the encoder is more accurate than the CCD Camera, and it can be used to justify the measuring error of CCD Camera. The self-organizing sliding mode fuzzy controller is designed for fixed-position isolation control. Via variety experiments and comparisons, it is to justify whether the encoder can be replaced by the CCD Camera in the pneumatic isolation control Systems.
31
林柏忠. "An active pneumatic isolation system." Thesis, 1988. http://ndltd.ncl.edu.tw/handle/89096934099864237363.
Повний текст джерела
32
shien, Yang shih, and 楊士賢. "Analysis of Hydro-Pneumatic Suspension System." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/88213656766525711312.
Повний текст джерелаАнотація:
碩士大葉大學
機械工程研究所碩士在職專班
96
A heavy off-road land vehicle’s safety, ride, and handling are the mainly consideration when exercised in cross-country road. Since the traditional mechanical suspension system need to maintain controllable of vehicle, the driver and passengers have to endure the intense impact from the road. On the other hand, the pursuit of ride will be ignored by safety and handling. To explore a good suspension system installation is very important. This paper adopted hydro-pneumatic suspension system and used double A-arm suspension design institutions to discuss heavy-duty wheeled vehicle. And, this paper utilized Automatic Dynamic of Mechanical Systems (ADAMS), a kind of software for multi-body dynamics, to establish a two-degree-of-freedom (2-DOF) quarter-car dynamic model. Then, input a different frequency stability sine wave to carry observation of the quality of dynamic response, to examine the vertical movement and the frequency domain performance of the hydro-pneumatic suspension system, and to explore the human body vibration on the impact of comfort. Re-use suspension durability testing platform for dynamic experiments, comparison of the vertical movement and acceleration between the actual hydro-pneumatic suspension system components and construction model. Finally, implementation of decompression tests for the nonlinear air-spring of the hydro-pneumatic suspension system, to understand suspension system performance by the pressure of air- spring changes impact. The results showed that the heavy-duty wheeled vehicle using hydro-pneumatic suspension system can reduce the components occupy space of vehicles and perform a more stable condition. It can achieve good results in ride evaluation. In addition, the experimental verification of results of the hydro-pneumatic suspension system ADAMS model is very close to the actual status. Compared with the traditional coil-spring suspension system, the hydro-pneumatic suspension system can reduce the pressure of air-spring to improve riding comfort. The hydro-pneumatic suspension system in this research can be applied in the heavy type vehicles, and it can assemble with semi-active or active control components to increase the suspension performance. The hydro-pneumatic suspension system ADAMS model can expand to whole vehicle modeling, and further forecast the performance of ride comfort and handling.
33
CHUAN, CHANG WEI, and 張位全. "Study of Hybrid Pneumatic Power System." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/90093492417269414358.
Повний текст джерелаАнотація:
碩士大葉大學
車輛工程學系碩士班
92
The Hybrid Pneumatic Power System (HPPS) is introduced in this study. The system not only stores “Flow Work” instead of storing electrochemical energy, but also manages and optimizes energy. The innovative power system can make the internal combustion engine always running at the optimal condition, and can recycle the exhaust flow to improve the efficiency of the whole system. A simulation software (ITI-SIM) is used to simulate the dynamic behavior of the HPPS according to the European emission certification of light duty vehicles (ECE47). The simulation result is examined with the experimental measurement. This study shows that the system can meet the reguirement of ECE47, and also proves that the device of exhaust gas recycling can compensate the defection of low energy density of gas and then increase the whole system efficiency substantially.
34
孫源成. "Optimization of a Pneumatic Wind Energy System." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/45766121341492831872.
Повний текст джерелаАнотація:
碩士國立清華大學
動力機械工程學系
101
The purpose of this research is to determine the efficiency of the “Pneumatic Wind Energy System”, which was invented by Dein SHAW and other people, under various conditions and design a control system. The system is able to control the gear ratio of CVT and the switch of clutch according to the environmental wind speed and the situation of the whole system. And to solve the problem of gas leakage, which happened when air compressor operating under high pressure, proposing an idea of hydraulic subsystem to improve the efficiency of the whole system. The thesis starts from introducing subsystems of the “Pneumatic Wind Energy System” and the way of measuring efficiency. Then explain the logic and operation principle of the control system. Finally introduce the new hydraulic subsystem and its operation principle.
35
Jheng, Jia-Sheng, and 鄭家昇. "Siding mode control for pneumatic servo system." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/20371580813545176836.
Повний текст джерелаАнотація:
碩士國立中央大學
機械工程研究所
96
The purpose of this thesis is to control the air motor by using the DSP controller. This thesis was presented the results of position control in a single axis of table by PID, PD-Modulation controller as well as Sliding-Mode controller (SMC). The nonlinear system is caused by friction force and compressibility of air in the mechanism. The gains of PID controller were decided by Ziegler Nichols method. The PD Modulation controller was evaluated from the gains of PID controller and the definitions of PD modulation method. At the end of this thesis, the SMC will be proved that it has better robustness for uncertain system, the ranges of uncertain parameters can be found by the system identification functions in MATLAB. Because of lower speed, the friction behavior, causes the steady state error, is complicated and difficult to predict. Therefore, the friction compensation was applied to eliminate the steady state error and the following experimental results were illustrated the comparisons of methods previously described.
36
Lu, Wei-chun, and 呂偉群. "CCD Based 2D Pneumatic Arm Control System." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/86516736533263824095.
Повний текст джерелаАнотація:
碩士國立臺灣科技大學
機械工程系
96
In this thesis, a pneumatic arm is setup by pneumatic muscle actuators and is associated with a CCD camera to measure the 2D trajectory via the photo vision transformation. To compare with the traditional sensors, the CCD camera is a non-contact sensor. Its installation is easier and less loading effect. Due to pneumatic nonlinearifies and non-symmetric moment effects, and to reduce the computer load of on-line system identification, this thesis implements the sliding mode fuzzy controller the 2D trajectory control. Through variety trajectory tracing experiments, it can study the characteristics of this photo vision based 2D pneumatic arm, and evaluate their trajectory tracking control performance.
37
NGHIA, DUONG DINH, and DUONG DINH NGHIA. "STUDY OF SYSTEM INTEGRAL EFFICIENCY OF HYBRID PNEUMATIC POWER SYSTEM." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/t2765s.
Повний текст джерелаАнотація:
碩士國立臺北科技大學
車輛工程系所
105
There is the considerations of protection of the global environment from vehicle pollution, reduction in fuel consumption, and maintenance of a high level of performance by end-user vehicles. In field of Vehicle engineering, the researchers focus to find new type of vehicle with more efficiency. Based on conventional powertrain system, the Hybrid pneumatic power system (HPPS) is one of type of hybrid system. It is integrated by an internal combustion engine (ICE), an air compressor, a high-pressure air storage tank and a air motor. The HPPS stores flow work instead of storing battery’s electric-chemical energy. Moreover, this system not only recycle the exhaust-gas energy but also make the ICE operation at its optimal point. Thus, it can be considered as an effective solution to improve thermal efficiency and reduce emissions. This thesis presents the study of HPPS integral efficiency. Element on system with experimental set-up obtains good condition. The HPPS was operated at different condition of ICE speed, fuel consumption, compressor speed, pressure in air tank, and cross section area. This study focuses on the operation of system, such as the efficiency of internal combustion engine, the efficiency of compressor, and the efficiency of air motor. The best working area of HPPS was defined. Finally, the HPPS integral efficiency is measured at best operation of HPPS. The experimental results showes that the system’s thermal efficiency can reach up to about 45%. It is higher than 28% of the case of individual internal combustion engine.
38
LIU, Zheng-Xue, and 劉政學. "A Study on Self-Tuning Pneumatic Counterweight System." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/87380473829619781168.
Повний текст джерелаАнотація:
碩士建國科技大學
機械工程系暨製造科技研究所
97
The pneumatic counterweight system with a pneumatic servo control will perform better than those without having the control equipped, such as the weight mass system, hydraulic counterweight system and regular pneumatic counterweight system. However, the servo control technology is technically complex and characterized by its high cost, difficulty of maintenance and high demanding on the environment. With a precision pressure regulator, a conductive pressure type regulator with large displacement function, solenoid valve, a pressure switch, and pneumatic and electrical control elements, the study designs a system control loop which is capable of controlling the pneumatic cylinder with low coefficient of friction and driving the counterweight slider to enable it to achieve the condition of nearly zero load. To represent the concept in material form, the study develops a self-tuning pneumatic counterweight system to conduct performance testing, and the experimental results indicate that the self-tuning pneumatic counterweight system developed herein is capable of controlling sliders with various counterweights to attain the condition of nearly zero load under continuous variable speed.
39
Lee, jiann bang, and 李建邦. "Pressure tracking control of a pneumatic control system." Thesis, 1998. http://ndltd.ncl.edu.tw/handle/34913924192704550578.
Повний текст джерелаАнотація:
碩士國立成功大學
機械工程學系
86
Because of the high compressibility of air, it is very difficult to obtain the precise mathematical model of pneumatic control system. The fuzzy logic control and the neural network theories have been developed in the recent decades. By means of applying the fuzzy logic control theory to design a controller whose mathematical model of the system is not necessary, and the neural network has the ability of learning. Therefor, it is very suitable to apply the intelligent control theory which combines the fuzzyThis paper presents an on-line neural fuzzy controller to control the preesure of a pneumatic cylinder. According to the system output and input relation The learning rate can adjust by itself for increasing learning efficiency. A pressure reducing valve is often used in traditional pneumatic pressure control system, this paper compares servo valve and proportion valve to control pneumatic pressure system. According to the experimental data, the neural fuzzy controller has good accuracy in pressure control in each case.
40
Shen, Yu-Ta, and 沈毓達. "Design and application for a pneumatic motor system." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/46898019761429783442.
Повний текст джерелаАнотація:
博士國立中央大學
機械工程研究所
98
Nowadays, air motors are widely used in the automation industry due to special requirements, such as spark-prohibited environments, the mining industry, chemical manufacturing plants, and so on. The purpose of this thesis is to analyze the behaviors of a vane-type air motor and to design a model reference adaptive control (MRAC) with a fuzzy friction compensation scheme for speed control. The behaviors of a ball screw table powered by a vane-type air motor are analyzed and a robust sliding mode controller is designed for position control. Currently in Taiwan, there are more than 13 million motorcycles, mostly driven by internal combustion engines (ICE). The pollutants, carbon monoxide (CO) and unburned hydrocarbons (HC), generated by motorcycles are account for more than 10% of the air pollutants released to the atmosphere every year. In order to improve the air pollution condition and eliminate the pollutants exhausting, this thesis also presents two new ideas of using compressed air as the power source for motorcycles. One idea is to equip a motorcycle with an air motor, which transforms the energy stored in the compressed air into mechanical energy. The other is to develop a hybrid pneumatic motorcycle, whose driving performance and the mileage are simulated. This pneumatic hybrid motorcycle can improve efficiency with an appropriate control strategy for driving operation.
41
Gong, Ding-Cong, and 龔鼎琮. "An Investigation of Pneumatic Bidirectional Microfluid Driving System." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/91238407157399663447.
Повний текст джерелаАнотація:
碩士國立成功大學
航空太空工程學系碩博士班
92
This research studies the design of pneumatic driving systems for bidirectional flow control in microchannels. A pneumatic driving system uses an external air compressor as the power source. It induces a pressure difference across the microchannels by driving compressed air through specially designed air passages. The pressure difference provides either a suction force or an exclusion force to drive the microfluid in the channel. If the driving system is capable of generating only one kind of force, either suction or exclusion, then both ends of the microchannel must be connected to a driving unit in order to acquire bidirectional flow control. If the driving is capable of generating both kinds of force, then the microchannel requires only a single driving unit at one end for bidirectional flow control. The research uses computational fluid dynamics as a tool to examine the various geometric parameters of pneumatic driving systems. New designs are proposed based on the computational results. Finally, experiments are conducted on microchannels of 1 mm × 1 mm cross section to verify the validity of the new designs.
42
Gung-Lin, Jin, and 金冠霖. "System Identification of a Pneumatic Artificial Muscle Using an Embedded System." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/52a3nj.
Повний текст джерелаАнотація:
碩士國立臺灣師範大學
機電科技學系
101
Pneumatic artificial muscle is a highly nonlinear system because of the internal friction effects, so the LuGre friction model is developed for the friction model of the pneumatic artificial muscle in this paper, and the Particle Swarm Optimization Algorithm (PSO) is used to solve the unknown parameters of the friction model for the system identification of the pneumatic artificial muscle. In addition, the Programmable System on Chip (PSoC) is used for the data acquisition of the pneumatic artificial muscle system. The data about the displacement and the pressure of pneumatic artificial muscle are measured for the development of the hysteresis loop in the pneumatic artificial muscle.
43
Huang, Ming-Jie, and 黃明杰. "The Research of the Control System of Pneumatic Transplanting." Thesis, 1997. http://ndltd.ncl.edu.tw/handle/64728425778484601183.
Повний текст джерелаАнотація:
碩士國立中興大學
農業機械工程學系
85
The purpose of the study is by using 8051 single-chip to develope a control system of pneumatic transplanting machine for plug seeding that designed and improved by National Chung Hsing university. By using the 8255 chip pins the 8051 single-chip is extended. Besides, we also used relays to drive the direction control valves those cylinders needed, and we used magnetic limit switch to sense the position of cylinders while they were working. Considering the actually test of transplanting, two casess can be considered. Case 1 is the movement done with unit motion, and case 2 is the movement done with part montions in the same time.The results showed that the transplanting speed of case 1 is about 2500 seedlings per hour, and the transplanting speed of case 2 is about 3800 seedlings per hour after amending the program. Compared with the used control system, the effect of transplanting is quite same.
44
BIN, JHONG-CIANG, and 賓仲強. "A Study on Precision Pneumatic Guide Way Equipment System." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/26714243277538504406.
Повний текст джерелаАнотація:
碩士聖約翰科技大學
自動化及機電整合研究所
97
This paper aims to explore the gas-lubricating rail system, including the main contents of precision air-systems, rigid analysis and the best part of three combinations of the parameters. Flotation system in precision include institutions and sophisticated control systems, precision ceramic body using sophisticated slider design and guide precision, high precision and stability in the availability of precision, all-metal materials used another slider, and two slide design, Guide to two different surface roughness and ceramics Guide to do a total of three experimental analysis of the impact of its rigid value, is used Restrictor Restrictor their own productions. Control systems using PC-Base Control, precision ball screw lead, optical ruler with the servo motors, the design of the production of closed-loop control system. Precision load testing is used, the three-measuring device, laser confocal displacement meter and nano-level vibration analyzer to detect the rigid system. Re-use Taguchi gas pressure by adjusting the air bearing gap, the load parameters such as load, find the best parameter combination to improve the quality of system equipment. Finally, in accordance with the experimental data confirmed the rail and the slider (air bearing surface) of the surface roughness on the overall impact of gas lubrication equipment really great is that the air bearings and the surface roughness caused by instability of the gas flow.
45
Chung-Yi, Wu, and 吳崇溢. "Design of an Embedded Expert System on Pneumatic Experiment." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/bkjq2v.
Повний текст джерелаАнотація:
碩士國立臺灣師範大學
應用電子科技研究所
97
Expert systems are knowledge-based systems that emulate expert thought to solve significant problems in a particular domain of expertise. The artificial intelligence represented by expert systems has evolved to be a very useful approach for problem solving. In this research, produces an Intelligence Computer-Assisted Instruction (ICAI) system for Pneumatics, including expert system and knowledge-based systems design. The real-based teaching systems harness the power of information technology to increase interaction between the teacher and the students, to promote individualized learning environments, and to improve the quality of teaching and learning. In this research, Silicon Laboratories development is used as the system module. Its’ system kernel uses system on chip microprocessor for 8051 based. According to the expert system inference results, classify knowledge rule base, experiment rule base, and diagnosis rule base. Finally, those expert rules are embedded on microprocessor. The microprocessor properties are real time, interaction and intelligent reasoning. The function of the module in Reality Wiring Service Panel (RWSP) is to receive the signal from signal acquisition module. Students can practice and accustom to the operating and experimenting on this test-platform for the experiment study of pneumatic operation. Following the requests of real-time, small-volume, low-loss, high- stability, this research develop an interaction and intelligence system for assist teachers to give a guidance and examples to students. Students could use and practice in the virtual wiring environment to achieve the practice purpose of skill learning. Finally, this environment can monitor different kinds of wiring study, and it has the functions of real-time interaction, intelligent guidance and determination for wiring experiment on pneumatic. This system has enhances the efficiency of learning environment and the effectiveness of learning.
46
Dolleman, Paul Christiaan Faria e. Melo. "Development of a Controller for a Servo-pneumatic System." Dissertação, 2017. https://repositorio-aberto.up.pt/handle/10216/107750.
Повний текст джерела
47
Nguyen, Hoai-Nam, and Nguyen H. N. "Study of Dynamic Simulation of Hybrid Pneumatic Power System." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/69344h.
Повний текст джерелаАнотація:
碩士國立臺北科技大學
車輛工程系所
97
The automotive manufacturing industry has been under tremendous pressure to develop high-efficiency power-train systems because of the considerations of protection of the global environment from vehicle pollution, reduction in fuel consumption, and maintenance of a high level of performance by end-user vehicles. Besides the conventional hybrid electric vehicles, an innovative hybrid pneumatic power system (HPPS) is undergoing research and considered to be a promising technology; it replaces the battery’s electrochemical energy with a high-pressure air storage tank and enables the internal combustion engine (ICE) to function at its sweet spot. The HPPS, which effectively merges both the high-pressure air flow from the storage tank and the recycled exhaust flow from the ICE, thereby increases the thermal efficiency of the ICE and transforms the merged flow energy into mechanical energy using a high efficiency turbine. This research focuses on the major research process into HPPSs, including overall dynamic simulation and experimental validation. By using the latest simulation tool ITI-Sim, this research demonstrates an experiment which can be operated precisely according to the requirements of various driving conditions under which a car actually runs on the road in accordance with the regulated running vehicle test mode. HPPS is expected to increase the energy, and therefore the performance, of the entire system from originally 15% to approximately 39%, and is likely to replace the traditional system in the coming years.
48
Yu, Chia-wei, and 余佳威. "Fuzzy Sliding Control Applied in a Hybrid Pneumatic System." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/anr233.
Повний текст джерелаАнотація:
碩士國立臺灣科技大學
機械工程系
94
Abstract This thesis mainly uses Visual Basic as software developing environment by using the interface card “PCI-1710”. And we apply Sliding Mode Fuzzy Controller (SMFC) to control this 2D hybrid pneumatic system which is combined with servo pneumatic actuator and servo pneumatic motor. PCI-1710 not only can control the system accurately, but also monitor the position of this system to prevent the damage due to the user’s improper operation. It can also make the proper adjustment for various demands. There are two sets of experiments in this thesis, including position control and trajectory control. For position control experiments, we will discuss the individual component’s position control performances. For trajectory control experiments, we will discuss the tracking performance of ramp and sinusoidal commands in this 2D hybrid pneumatic system. Then, we can find out system’s responses of SMFC is better than Fuzzy control.
49
Luo, Jian-Huan, and 羅健桓. "A Photo Vision Based 3D Pneumatic Arm Control System." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/50169358296905946135.
Повний текст джерелаАнотація:
碩士國立臺灣科技大學
機械工程系
96
This thesis is mainly to control 3D pneumatic arm using photo vision feedback. The 3D pneumatic arm is setup by pneumatic muscle and rotational actuators. It is associated with two sets of CCD Camera and their photo visions can by transformed to the 3D position measurement. It implements a self-organizing sliding mode fuzzy controller for the 3D trajectory tracking control. Then through variety trajectory tracking experiments, it can study the characteristics of this photo vision based 3D pneumatic arm, and evaluate their trajectory tracking control performance.
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HUNG, WEI SHIH, and 魏世弘. "Study of Energy Management of Hybrid Pneumatic Power System." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/37729277040399424387.
Повний текст джерелаАнотація:
碩士大葉大學
車輛工程學系碩士班
94
In this research, we proposing an innovative Hybrid Pneumatic Power System (HPPS), the best feature of this system are which stores “high pressure and temperature pneumatic energy” instead of storing electrochemical energy of the battery, to optimum the management and application of the energy, and achieve the goal of environmental protection and economize energy. This system can make the internal combustion engine operation in the sweet spot and use the energy merge device to make compressed air and engine exhaust energy to complete mixed and to push the air motor to generate power, this purpose is recycle the amount of engine exhaust energy and change it to a useful mechanical energy, and to compensate the low air density problem. So it can be enhance engine heat efficiency apparently and reduce exhaust pollution、fuel economy and manufacturing expenses. This study mainly utilizes the FLUENT software to solve questions with the numerical simulation method. In regard to the structure of merge device with three-dimension. We set up an internal combustion engine exhaust periodicity pressure and an air motor performance curve to correspond the situation of HPPS system works with the structure of merge device is controlled and adjusted, the transient phenomenon of converge state and heat transfer will also be analyzed. In addition, the change in the structure of merge device of the downstream will be observed. Through the energy merge device, these two different energies can be complete mixed and combined, and the key point is HPPS system can recycle the exhaust energy in the internal combustion engine and transform it to a useful mechanical energy. If the pressure of compressed air is too strong, it will prevent the exhaust energy from transmitting and mixing smoothly. Furthermore, it will affect the total power of air motor greatly. Therefore, in order to enable these two different energies can be complete mixed and combined, so that the tube of merge device will be active controlled and adjusted by ECU to produce Venturi effect, and to enhance air density and entire HPPS system efficiency apparently.