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Dissertations / Theses on the topic 'Hydraulic drive system'

Author: Grafiati

Published: 30 May 2022

Last updated: 31 July 2025

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1

Lodewyks, Johann, and Pascal Zurbrügg. "Decentralized energy-saving hydraulic concepts for mobile working machines." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-199996.

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The high price of batteries in working machines with electric drives offer a potential for investment in energy-saving hydraulic systems. The decentralized power network opens up new approaches for hydraulic- and hybrid circuits. In addition, the regeneration of energy can be used at any point of the machine. For the example of an excavator arm drive with a double cylinder two compact hydraulic circuits are presented, which relieve a central hydraulic system.

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2

Sagström, Johan. "Streamlined LCA model and complete assessment of a hydraulic drive system." Thesis, KTH, Skolan för industriell teknik och management (ITM), 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-217801.

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This master thesis was commissioned by Bosch Rexroth AB and carried out over the course of 20 weeks between January and May 2017. The company produces hydraulic drive systems for different industrial applications, mostly for rotating heavy loads under constant, low speed and high torque. The products have a long life span and thus, optimizing the design of their products can have a considerable impact in terms of energy efficiency and environmental performance. In order to gain a better understanding of what role individual parts of the system have in terms of sustainability and to further inv

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3

Shimizu, Juri, Takuya Otani, Kenji Hashimoto, and Atsuo Takanishi. "Simulation of an interlocking hydraulic direct-drive system for a biped walking robot." Technische Universität Dresden, 2020. https://tud.qucosa.de/id/qucosa%3A71091.

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Biped robots with serial links driven by an electric motor experience problems because the motor and transmission are installed in each joint, causing the legs to become very heavy. Previous solutions involved robots using servo valves, a type of highly responsive proportional valve. However, high supply pressure is necessary to realize high responsiveness and the resulting energy losses are large. To address this problem, we proposed a hydraulic direct-drive system in which the pump controls the cylinder meter-in flow, while a proportional valve controls the meter-out flow. Furthermore, our h

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Fernandes, Rita. "Efficient Volvo Bus Cooling System,Using Electrical Fans : A comparison between hydraulic and electrical fans." Thesis, KTH, Kraft- och värmeteknologi, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-155901.

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Economical and environmental factors together with energy policies towards more efficient systemsare the driving force for the development of the vehicle industry. Significant changes have beenmade to fulfill new emissions legislation but the basic internal combustion vehicle architecture hasbeen kept. New emission treatment systems that increase the thermal loading of the cooling systemhad been added within the same package envelope as before, which means less space to place coolingfans and a greater need for airflow. Changes in the cooling system, namely the replacement of thehydraulic fan d

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5

Lammers, 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.

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6

Бурлига, Михайло Борисович. "Розвиток методів розрахунку та вибір раціональних схем двопотокових безступінчастих гідрооб'ємно-механічних трансмісій колісних тракторів". Thesis, НТУ "ХПІ", 2017. http://repository.kpi.kharkov.ua/handle/KhPI-Press/35538.

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Дисертація на здобуття наукового ступеня кандидата технічних наук за спеціальністю 05.22.02 – автомобілі та трактори. Національний технічний університет "Харківський політехнічний інститут", Харків, 2017. Дисертація присвячена розвитку методів розрахунку для аналізу робочих параметрів безступінчастих ГОМТ і їх основних елементів ГОП, прогнозуванню техніко-економічних показників машинно-тракторного агрегату для визначення раціональних схемних рішень ГОМТ. Актуальність роботи полягає у необхідності забезпечення конкурентоспроможності вітчизняних тракторів. Здійснено аналіз роботи двопотокових

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7

Бурлига, Михайло Борисович. "Розвиток методів розрахунку та вибір раціональних схем двопотокових безступінчастих гідрооб'ємно-механічних трансмісій колісних тракторів". Thesis, НТУ "ХПІ", 2018. http://repository.kpi.kharkov.ua/handle/KhPI-Press/35536.

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Дисертація на здобуття наукового ступеня кандидата технічних наук за спеціальністю 05.22.02 – автомобілі та трактори. Національний технічний університет "Харківський політехнічний інститут", Харків, 2017. Дисертація присвячена розвитку методів розрахунку для аналізу робочих параметрів безступінчастих ГОМТ і їх основних елементів ГОП, прогнозуванню техніко-економічних показників машинно-тракторного агрегату для визначення раціональних схемних рішень ГОМТ. Актуальність роботи полягає у необхідності забезпечення конкурентоспроможності вітчизняних тракторів. Здійснено аналіз роботи двопотокових Г

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8

Pokorný, Jan. "Interakce mobilních pracovních strojů a pojížděného podloží." Doctoral thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2010. http://www.nusl.cz/ntk/nusl-233912.

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This dissertation thesis is concerning with an interaction between mobile working machines and rolled surfaces. Machines and their constructions parts behavior were observed. There are some machines that can change state of surface. And due to these change of surface the machine is in different conditions for drive and also for works. The interaction of working machines and rolled surfaces was categorized in this work and for each category here is a methodic work flow for solution of various cases. Three examples are described in this work. Some simulating programs were used for all cases and

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9

Gerec, Matúš. "Pohonný a brzdový systém motorového vozu železnice pro muzeum průmyslových železnic." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2017. http://www.nusl.cz/ntk/nusl-318852.

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This thesis deals with the design of the propulsion and braking system for narrow gauge railcar. It contains the design of hydrostatic drive system with closed-loop hydraulic circuit. Then thesis describes the concept of propulsion system placement in the frame of the railcar and design of the braking system.

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Онуцький, Віталій Григорович, Віталій Олегович Колодій, Vitaly Onutsky та Vitaly Kolodiy. "Розроблення автоматизованого стенду для дослідження вібростійкості електрообладнання". Master's thesis, Тернопільський національний технічний університет ім. І. Пулюя, Факультет прикладних інформаційних технологій та електроінженерії, Кафедра автоматизації технологічних процесів і виробництв, 2021. http://elartu.tntu.edu.ua/handle/lib/36718.

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Робота виконана на кафедрі автоматизації технологічних процесів і виробництв факультету прикладних інформаційних технологій та електроінженерії Тернопільського національного технічного університету імені Івана Пулюя Міністерства освіти і науки України. Захист відбудеться «23» грудня 2021р. о 9.00год. на засіданні екзаменаційної комісії №22 у Тернопільському національному технічному університеті імені Івана Пулюя.<br>В кваліфікаційній роботі подано результати аналізу та синтезу системи автоматизованого керування стендом для вібраційних досліджень електротехнічних установок та агрегатів. Дослід

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11

Бартош, Тарас Тарасович, та Taras Bartosh. "Інформаційно-вимірювальна система установки для розсортування деталей за внутрішнім діаметром отворів". Master's thesis, ТНТУ ім. І. Пулюя, 2020. http://elartu.tntu.edu.ua/handle/lib/33691.

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Розроблено інформаційно-вимірювальну систему установки для розсортування деталей за внутрішнім діаметром отворів. В даній кваліфікаційній роботі магістра було розроблено та спроектовано механізми подачі та розсортування, механізм подачі деталей. Проведено дослідження похибки вимірювання даного пристрою. Проаналізовано та описано технічні вимого до метеорологічних параметрів системи. Описано роботу приладу, його структурні та принципову схеми. Розраховано параметри схеми.<br>The information-measuring system of installation for sorting of details on internal diameter of apertures is developed.

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12

透, 山下, та Tohru Yamashita. "遮断器用油圧操作装置の動作時間安定化に関する研究". Thesis, https://doors.doshisha.ac.jp/opac/opac_link/bibid/BB13045046/?lang=0, 2017. https://doors.doshisha.ac.jp/opac/opac_link/bibid/BB13045046/?lang=0.

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電力用遮断器の油圧操作装置において，油圧回路内の気泡が操作装置の動作に及ぼす悪影響を解消するために，新しい油圧回路方式である常時高圧安定回路方式を提案し，油圧回路内の流れおよび可動部の定式化と解析および実測を行った．本方式の動作特性と動作安定性，ピストンの制動特性，複数の油圧操作装置の駆動特性について検討し，本方式が有効かつ安定的に機能することを確認した．以上により，油圧操作装置の動作時間安定化技術を開発することができた．<br>We proposed and studied a hydraulic operation stabilizing system for a hydraulic operating device of a circuit breaker to eliminate the influence of air bubbles created in hydraulic fluid. We formulated the flow of hydraulic circuit and the motion of moving parts, which were numerically simulated and experimentally confirmed. We confirmed that this stabilizing system functioned ef

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13

Stewart, James. "The application of artificial intelligence to fault detection in hydraulic cylinder drive systems." Thesis, Cardiff University, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.284493.

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An expert system approach to fault diagnosis of fluid power circuits is considered with emphasis on leakage flow detection, and for valvecontrolled cylinders. Two test rigs were used, one being a solenoid-valve controlled cylinder operated directly and in an open-loop mode, the other being a servo-valve controlled actuator operated by microcomputer and in a closed-loop mode. Both systems incorporated the use of on-line dynamic data, and for the closed-loop case operation and fault diagnosis was integrated into an automated procedure. Flow leakage detection was considered a priority, and an alt

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14

Frerichs, Ludger, and Karl Hartmann. "Efficient and high performing hydraulic systems in mobile machines." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-200364.

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Hydraulic systems represent a crucial part of the drivetrain of mobile machines. The most important drivers of current developments, increasing energy efficiency and productivity, are leading to certain trends in technology. On a subsystem level, working hydraulics are utilizing effects by improving control functions and by maximum usage of energy recovery potential. Independent metering and displacement control, partly in combination with hybrid concepts, are the dominating approaches. Traction drives gain advantage from optimized power split transmissions, which consequently are being used i

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15

Minav, Tatiana, Jani Heikkinen, Soumadipta Pyne, Sami Haikio, Juha Nykanen, and Matti Pietola. "Analysis of novel zonal two-cylinder actuation system for heavy loads." Technische Universität Dresden, 2020. https://tud.qucosa.de/id/qucosa%3A71078.

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Climate change and economic opportunities motivate investigating electric distributed power for working hydraulics in non-road mobile machinery (NRMM) instead of conventional hydraulics. This recent method allows significant energy savings in hydraulic systems, which was demonstrated previously by many independent studies. In this study, zonal hydraulics (as electrically distributed) are realized with direct driven hydraulics drive (DDH) units. Unlike conventional hydraulic drives the DDH units are disconnected from the engine (main prime mover) and distributed throughout the system. In a DDH

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16

賴志強 and Chi-keung Lai. "Dynamic response of a variable speed pumping system." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1994. http://hub.hku.hk/bib/B31212360.

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Lai, Chi-keung. "Dynamic response of a variable speed pumping system /." Hong Kong : University of Hong Kong, 1994. http://sunzi.lib.hku.hk/hkuto/record.jsp?B20666305.

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18

Miao, Miao. "Molecular dynamics simulation of electroosmotic & pressure driven flows in nanochannels." Online access for everyone, 2007. http://www.dissertations.wsu.edu/Thesis/Summer2007/m_miao_071907.pdf.

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19

Laudensack, Christian [Verfasser]. "Design and System Analyses of Canned Switched Reluctance Drives for Hydraulic Pump Applications / Christian Laudensack." Aachen : Shaker, 2016. http://d-nb.info/1118258894/34.

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20

Palavicino, Pablo Castro, Bulent Sarlioglu, Dheeraj Bobba, Woongkul Lee, and Tatiana Minav. "Electrification of hydraulic systems using highefficiency permament magnet motors." Technische Universität Dresden, 2020. https://tud.qucosa.de/id/qucosa%3A71116.

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In this paper, electrification of hydraulic systems is proposed using high-efficiency permanent magnet (PM) motors and wide bandgap power electronic drives. Direct driven hydraulics (DDH) is selected because of its higher efficiency compared to other conventional technologies such as valve-controlled systems. The DDH is directly driven by a servomotor. The ratings and design guidelines for a servomotor used in DDH applications are provided in this paper. Specifically, a surface permanent magnet synchronous machine (SPMSM) is designed. Finally, a state-of-the-art inverter using silicon carbide

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21

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.

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22

Absalyamova, Viktoriya. "Energy Analysis within Industrial Hydraulics and Correspondent Solar PV System Design." Thesis, Högskolan Dalarna, Maskinteknik, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:du-5099.

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Energy efficiency and renewable energy use are two main priorities leading to industrial sustainability nowadays according to European Steel Technology Platform (ESTP). Modernization efforts can be done by industries to improve energy consumptions of the production lines. These days, steel making industrial applications are energy and emission intensive. It was estimated that over the past years, energy consumption and corresponding CO2 generation has increased steadily reaching approximately 338.15 parts per million in august 2010 [1]. These kinds of facts and statistics have introduced a lot

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23

Mahmoud, Herman Abdulqadir Mahmoud. "Real-time operational response methodology for reducing failure impacts in water distribution systems." Thesis, University of Exeter, 2018. http://hdl.handle.net/10871/33492.

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Interruption to water services and low water pressure conditions are commonly observed problems in water distribution systems (WDSs). Of particular concern are the unplanned events, such as pipe bursts. The current regulation in the UK requires water utilities to provide reliable water service to consumers resulting in as little as possible interruptions and of as short possible duration. All this pushes water utilities toward developing and using smarter responses to these events, based on advanced tools and solutions. All with the aim to change network management style from reactive to a pro

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Sjölund, Rickard, and Nicklas Vedin. "Steering System Modelling for Heavy Duty Vehicles." Thesis, Linköpings universitet, Reglerteknik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-119770.

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Future heavy duty vehicles will be designed and manufactured with improved Advanced Driver Assistance Systems, ADAS. When developing ADAS, an accurate model of the vehicle dynamics greatly simplifies the development process. One element integral to the vehicle lateral dynamics and development of ADAS is the steering system. This thesis aims to develop an accurate model of a heavy duty vehicle steering system suitable for simulations. The input to the system is an input torque at the steering wheel and the output is the wheel angle. Physical models of the system components are developed using b

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25

Geiger, Chris, Niklas Maier, Florian Kalinke, and Marcus Geimer. "Assistance system for an automated log-quality and assortment estimation based on data-driven approaches using hydraulic signals of forestry machines." Technische Universität Dresden, 2020. https://tud.qucosa.de/id/qucosa%3A71221.

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The correct classification of a logs assortment is crucial for the economic output within a fully mechanized timber harvest. This task is especially for unexperienced but also for professional machine operators mentally demanding. This paper presents a method towards an assistance system for machine operators for an automated log quality and assortment estimation. Therefore, machine vision methods for object detection are combined with machine learning approaches for estimating the logs weight based on a Convolutional Neural Network (CNN). Based on the dimensions oft he object ´log, a first ca

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Ukozehasi, Celestin. "A physiological basis to crop improvement and agronomic development." Thesis, University of Cambridge, 2015. https://www.repository.cam.ac.uk/handle/1810/248744.

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Despite of the documented impacts of the so-called green revolution, food security in the world faces new challenges in terms of population growth, increases in no-agricultural land use (urbanization), and climate change. Trends in food security show that the world community is operating within two limits of food system: (i) the quantity of food that can be produced under a given climate; and (ii) the quantity of food needed by a growing and changing population. Therefore, taking food security successfully into the future requires novel approaches to boost agricultural productivity in order to

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Skvorchevsky, Alexander Evgenievich. "Modern requirements for electrohydraulic drives of combat and civilian vehicles." Thesis, Національний технічний університет України "Київський політехнічний інститут"; Механіко-машинобудівний інститут, 2016. http://repository.kpi.kharkov.ua/handle/KhPI-Press/28264.

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Seung, Taehun. "Holistic-Lightweight Approach for actuation systems of the next generation aircraft." Universitätsverlag Chemnitz, 2017. https://monarch.qucosa.de/id/qucosa%3A34400.

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Currently the system development of aircraft engineering concentrates its focus on the reduction of energy consumption more than ever before. As a consequence, the efficiency of subsystems inside the aircraft is highlighted. According to previous investigations the simplification/unification of conventional multifaceted board energy systems by means of electric power management is the most promising way concerning aircraft global efficiency improvement. The main aim of the present work was to optimize a multi-device, heavy duty EHA-System by introducing of a comprehensive perspective. In order

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Heyns, Louis Jacobus. "Describing function-based control synthesis for a nonlinear hydraulic drive system." Thesis, 2014. http://hdl.handle.net/10210/9688.

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M.Ing.<br>Experimental 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

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余均哲. "Design of a Compressed Air Driven Hydraulic Motor System." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/09022515772408888551.

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鄭傑. "Electric Controller Design of a Compressed Air Driven Hydraulic Motor System and and Bird-type Hydraulic Motor System Design." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/50792360001317087149.

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Chih, Dai Shang, and 戴尚智. "Design and Improvement of a Compressed Air Driven Motor Hydraulic System." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/98213756237190519578.

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碩士<br>國立清華大學<br>動力機械工程學系<br>104<br>The purpose of this research is to redesign the compressed air driven hydraulic motor system which is designed in the former research and to improve the control method and system efficiency. In this research, intake pipe system is rearranged. A new mode of operation to recover residual pressure is used. This recovering mode can boost the system to improve the system efficiency. Finally, we measure system efficiency in expand mode and isobaric mode to find out the optimum operating parameters.

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Yang, Ting Yuan, and 楊霆遠. "Oil Line Design and Control Method of a Compressed Air Driven Hydraulic Motor System." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/89161893279976001313.

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碩士<br>國立清華大學<br>動力機械工程學系<br>103<br>The purpose of this research is to redesign the compressed air driven hydraulic motor system which is designed in the former research and improve the oil line and control method. In this research, the valves in the piping system are rearranged to reduce the energy loss. The influence of the accumulators is also discussed. The use of the flow control valve and pneumatic ball valve controls the flow into the accumulator and adjusts the preload of accumulator to achieve better efficiency. To improve the control method, the system is added a new control phase and

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Nunes, Pedro Daniel da Cunha Moreira. "Analysis of the use of variable speed drives in water supply systems." Master's thesis, 2021. http://hdl.handle.net/10773/31361.

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Currently, operational control at the pumping stations is based on the water levels present in the tanks, ie, each time the water level reaches a certain minimum value, the pumps switch on until the tank is full again. Although this type of control is quite effective, it is also quite inefficient. This type of operation can be largely optimized by adjusting pumping operations to energy prices that vary throughout the day. Additionally, the use of variable speed drives can also increase the efficiency of the pumps due to its adaptations to daily water consumption. However, this type of op

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Chikh, Al Souk M. Molham Hasan. "Optimum design and control of hydraulic systems driven by swash plate pumps using vibration based diagnosis." Thesis, 2008. http://spectrum.library.concordia.ca/976026/1/NR42550.pdf.

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Swash plate pumps are widely used to drive hydraulic systems, especially because they offer high specific power. In order to improve their performance and make them more reliable, it is necessary to reduce the flow fluctuations, incorporate a control system that is more responsive, and minimize vibration levels. Furthermore, the flow should be controlled according to load requirements and pipe response at the design level. Moreover, there is a need to monitor the health of the system by analysing its vibration signatures. A novel port plate design is used with a pair of deep silencing grooves

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(9712886), Michael Roggenburg. "TECHNO-ECONOMICS ON THE APPLICATION OF HYDRAULICS IN WIND TURBINE DRIVE-TRAINS & THE DEVELOPMENT OF INTEGRATED RENEWABLE ENERGY SYSTEMS FOR USE IN WATER SECURITY ALONG THE US-MEXICO BORDER." Thesis, 2020.

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<p>Renewable energy adoption is critical when considering future energy grids and how they impact the environment, economy and society. While fossil fuels have traditionally been employed to generate the electricity used across every facet of the global economy, renewables are becoming increasingly more attractive as a substitute. Fossil fuels have historically outperformed their clean energy counterparts in terms of levelized cost. However, over the last few decades renewables have become extremely cost competitive and are starting to outpace their opposition as advancements in technology con

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Ammanagi, Soumayya. "Vibration Testing of Structures under Random Support Excitations." Thesis, 2015. http://etd.iisc.ac.in/handle/2005/3999.

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Vibration testing of structures constitutes a crucial step in design and commissioning of engineering structures. The focus here is on simulating field conditions in a laboratory so that detailed investigations of the structural behavior under various future load scenarios can be carried out. A major enabling technology in recent years in this field of study, especially, in the context of earthquake engineering, and automotive testing, has been the development of servo-hydraulic actuation systems, which form the principal component of test facilities, such as, multi-axes shake tables for tes

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Ammanagi, Soumayya. "Vibration Testing of Structures under Random Support Excitations." Thesis, 2015. http://etd.iisc.ernet.in/2005/3912.

Full text

Abstract:

Vibration testing of structures constitutes a crucial step in design and commissioning of engineering structures. The focus here is on simulating field conditions in a laboratory so that detailed investigations of the structural behavior under various future load scenarios can be carried out. A major enabling technology in recent years in this field of study, especially, in the context of earthquake engineering, and automotive testing, has been the development of servo-hydraulic actuation systems, which form the principal component of test facilities, such as, multi-axes shake tables for tes

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