Academic literature on the topic 'Hydrostatic drive'

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Journal articles on the topic "Hydrostatic drive"

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Hasan, Md Ehtesham, K. Dasgupta, and Sanjoy Ghoshal. "Comparison of the efficiency of the high speed low torque hydrostatic drives using bent axis motor: An experimental study." Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering 231, no. 4 (December 11, 2015): 650–66. http://dx.doi.org/10.1177/0954408915622413.

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This article is aimed at analysing the steady-state performance of four hydrostatic drives and compares their overall efficiency. The speed of the hydrostatic drives is controlled by speed controlled vane pump, variable displacement flow compensated pump, variable displacement pressure compensated pump and proportional direction controlled valve. Bondgraph simulation technique is used to model the hydrostatic drive. The relationships of the loss coefficients with the state variables obtained from the model are identified through experimental investigation. Using them, at different torque levels, the performances of the hydrostatic drives are studied on their slips, torque losses and the overall efficiencies and they are validated experimentally. It is found that hydrostatic drive using speed controlled vane pump exhibits the maximum efficiency, whereas the poorest efficiency is shown by the valve controlled system out of the four drives considered in the analysis.
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Vardhan, Alok. "Energy saving analysis of the hydrostatic drives used in the rotary head system of the blast hole drill rig." Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering 233, no. 5 (March 13, 2019): 1086–97. http://dx.doi.org/10.1177/0954408919836375.

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Blast hole drill rigs are used for drilling the soft and the medium-hard rocks in open-pit mines. In such rigs, the drill bit is rotated by a hydrostatic drive. In this respect, two different type hydrostatic drives have been considered. In the first drive, the rotation of the drill bit takes place by a variable displacement pump and two low-torque high-speed hydro-motors along with a step-down gear unit (i.e. LTHS drive), whereas in the second drive an identical pump and a high-torque low-speed hydro-motor (i.e. HTLS drive) rotate the drill bit. In this study, the energy saving analysis of the above mentioned hydrostatic drives has been performed with respect to the load profile of the blast hole drilling. In this respect, the modelling, simulation and the experimentation of the drives have been carried out. Simulations have been performed in MATLAB–Simulink environment and it has been verified through experiments. The proportional-integral-derivative control algorithm has been used to control the drives speed in various loading stages. Results show that the high-torque low-speed drive save more energy compares to the low-torque high-speed drive for the usual operating range of the blast hole drilling.
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Kumar, N., and K. Dasgupta. "Steady-state performance investigation of hydrostatic summation drive using bent-axis hydraulic motor." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 229, no. 17 (November 17, 2014): 3234–51. http://dx.doi.org/10.1177/0954406214559410.

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This article investigates the steady-state performance of a closed-circuit hydrostatic summation drive used in heavy earth moving machine through modelling and experiment. The proposed drive basically consists of variable displacement pump and bent-axis motor. The performance studies of the drive have been made for its two different modes of operation: using single motor and two motors. Bondgraph simulation technique is used to model the drive, where various losses are lumped into suitable resistive elements. The relationships of the losses with the state variables obtained from the model are identified through experiments. The dependencies of the loss characteristics on the load torque and the pump displacement ratio are studied. The model has been verified experimentally. The performances of the hydrostatic drives are studied at different torque levels with respect to its slip, torque-loss and overall efficiency, using the expressions describing the characteristics of the loss-coefficients. The investigation also identifies the operating range of the proposed hydrostatic drives with reasonable efficiency.
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Vardhan, Alok, K. Dasgupta, N. Kumar, and Santosh Kr Mishra. "Steady-state performance investigation of open-circuit hydrostatic drives used in the rotary head of drill machine." Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering 233, no. 1 (October 31, 2017): 3–20. http://dx.doi.org/10.1177/0954408917738973.

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This paper highlights the steady-state performance of open-circuit hydrostatic drives for the rotary head of drill machine through modeling and experiment. In this respect, two alternative drive systems are considered. A drive system that consists of a variable displacement pump and two high-speed low-torque hydro-motors with a gear reducer unit and the other one consists of an identical pump and a low-speed high-torque hydro-motor. The steady-state model of the proposed drive arrangements is made by bondgraph simulation technique, where the relationship of the various losses of the components are obtained as a function of operating parameters and are identified experimentally. Using them, the slip and torque loss along with the overall efficiency of the drives are characterized. The performances of the hydrostatic drives are compared for the usual operating speed range of the drill machine used in mining operation. The studies made also identify the operating range of the proposed hydrostatic drives with reasonable efficiency.
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Dasgupta, K., Sanjoy K. Ghoshal, Sujit Kumar, and J. Das. "Dynamic analysis of an open-loop proportional valve controlled hydrostatic drive." Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering 233, no. 6 (July 16, 2019): 1245–56. http://dx.doi.org/10.1177/0954408919861247.

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This article highlights the dynamic analysis of a proportional valve controlled hydrostatic drive. Such drives are used widely in construction and mining applications. In the drive considered for the analysis, the speed of a bent-axis hydro-motor is controlled by varying flow supplied through a proportional direction controlled valve. A non-linear mathematical model using bond graph simulation technique is developed, where detailed model of the drive system including its loading arrangement is incorporated. From the test results of the pressure-flow characteristics of the valves, its port resistances are identified. Using them and taking into account various losses of the hydro-motor, the drive model is validated through experiments. The verified model is used to study the effects of the perturbations of some critical parameters on the transient responses of the hydrostatic drive through simulation. The proposed model may be useful for initial design of such drive and the development of control systems where these drives are used as actuators.
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Zhang, Qing Yong, and Shu Jun Guo. "Study on the Drive/Brake Features of Vehicle with Electric Control and Hydrostatic Drive." Applied Mechanics and Materials 44-47 (December 2010): 1661–65. http://dx.doi.org/10.4028/www.scientific.net/amm.44-47.1661.

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A new technical scheme of vehicle with electronic control and hydrostatic drive (ECHD) is proposed in the paper. To make out the drive/brake features of the vehicle, a model, combined with the vehicle dynamics and hydrostatic transmission dynamics, and the corresponding simulation program is developed, in which, a gas-charged accumulator is used as power source and energy storage component. In this paper, three main misuses are investigated, i.e. the energy recover and consumption of hydrostatic transmission when drive/brake, vehicle dynamics parameters in drive/brake and how the key components, hydraulic variable motor and accumulator, contributing to the performance. The result of simulation shows some characteristic features of the ECHD vehicle, which should be paid attention on when study the ECHD vehicle.
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Mandal, S. K., K. Dasgupta, S. Pan, and A. Chattopadhyay. "Theoretical and experimental studies on the steady-state performance of low-speed high-torque hydrostatic drives. Part 2: Experimental investigation." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 223, no. 11 (July 6, 2009): 2675–85. http://dx.doi.org/10.1243/09544062jmes1203.

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The performance investigations of an open-circuit and a closed-circuit low-speed high-torque hydrostatic drive are presented. The modelling of both drives and determination of their loss coefficients are presented in Part 1 of this article (pg. 2663 of this issue). This study determines and analyses the overall efficiency and slip characteristics of the hydrostatic drives using the expressions describing the characteristics of their loss coefficients. The effects of critical control parameters of the pumps and the motor are investigated on the basis of their steady-state performance. This investigation is based on the performance of the hydrostatic transmission drives at different torque levels.
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Cieślik, Karol, Marian Janusz Łopatka, Arkadiusz Rubiec, and Kacper Spadło. "Concept of high mobility wheelchair with hydrostatic drive system." AUTOBUSY – Technika, Eksploatacja, Systemy Transportowe 19, no. 6 (June 30, 2018): 827–30. http://dx.doi.org/10.24136/atest.2018.183.

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The article presents the concept of a high mobility wheelchair with a hydrostatic drive system .It presents existing solutions of manually driven wheelchair and external powered solutions. It was proposed original drive system, suspension system and turning system unheard in wheelchairs. It was analyzed the distribution of required components. On this basis there was created dynamic model. It was subjected to tests determining the driver's comfort and the load on the structure. The strength analysis of the proposed structure was carried out. As the result, it was created an innovative concept of the high mobility wheelchair capable to moving everywhere where other people can do.
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Konopka, Stanisław, Marian Janusz Łopatka, and Mirosław Przybysz. "Kinematic Discrepancy of Hydrostatic Drive of Unmanned Ground Vehicle." Archive of Mechanical Engineering 62, no. 4 (December 1, 2015): 413–27. http://dx.doi.org/10.1515/meceng-2015-0024.

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Abstract The study presents the issue of kinematic discrepancy of hydrostatic drive systems of high mobility vehicles, and its impact on the presence of the unfavourable phenomenon of circulating power. Furthermore, it presents a theoretical discussion concerning the capacity of the compensation of kinematic discrepancy by a hydrostatic drive system on the basis of tests using static characteristics.
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Voronin, Serhii, Dmytro Onopreychuk, Volodymyr Stefanov, Yevhenii Bashkatov, and Vitalii Panchenko. "Reduction of Construction Duration by Improving the Anti-Wear Properties of Power Fluids in Hydraulic Drives of Earth-Moving Machines." International Journal of Engineering & Technology 7, no. 4.3 (September 15, 2018): 105. http://dx.doi.org/10.14419/ijet.v7i4.3.19717.

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The structure of reduction of construction duration which takes into account the effect of the electrostatic field on the power fluid of a hydrostatic power drive of earth-moving machines is considered. Experimental studies are also considered that suggest that the exposure of the power fluid to an electrostatic field leads to the intensified formation and increased thickness and bearing capacity of the lubricant film on the friction surfaces of the hydraulic drive. This causes the reduced wear rate of the components of a hydrostatic power drive. In particular, gaps in plunger pairs in the pump are reduced, which contributes to the increase of the coefficient of performance. As a result, the operating speed of the driven equipment increases, i.e., the work cycle duration is reduced, and hence the capacity of earth-moving machines increases and the duration of the preparatory earthwork, which is about a quarter of the total duration of all construction works in general, is reduced.
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Dissertations / Theses on the topic "Hydrostatic drive"

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Müller, Benedikt, and Heiko Baum. "Impedance measurement in a hydrostatic drive." Technische Universität Dresden, 2020. https://tud.qucosa.de/id/qucosa%3A71159.

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Pressure oscillation in hydrostatic drive trains can cause noise and damage to components. They impair function and reliability. The visualization of the oscillation mode helps to clarify the causal relationships in the hydrostatic drive train and is a basis for the development of remedial measures. Analysis of the pressure oscillation situation, however, can only be carried out in the complete system, since line branching and the impedance of the hydrostats have an influence on the resonance frequencies and the oscillation modes. If only the line length between the components is considered in the pressure oscillation analysis, neither the calculated frequencies nor the position of the pressure antinodes where possible remedial measures are to be placed are correct. This paper presents the metrological determination of the impedance of a hydrostat on a functional test bench (“mobile impedance measurement”) and the preparation of the measurement data for the subsequent simulative pressure oscillation analysis of a hydraulic drive train.
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Schmid, Fabian, and Ralf Schrempp. "Potential in hydrostatic drive through intelligent mechanical solutions." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-199542.

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Drive requirements of tractors and communal vehicles are demanding and varied. Energy efficiency and the different requirements in off-road and on-road operation are the basis for a powerful drive. Combinations with the so-called hydrostatic wide angle technology are often used. The article deals with a hydraulic drive with wide angle technology (45°) and an integrated, quick-shift, single stage transmission. A particularly large conversion range can be realized with this. Special shift elements, sensors and an adjustment developed for this purpose enable a fast, quiet and low-wear gear change. This new gearbox development will in future be implemented at RIGITRAC in cooperation with SAUER BIBUS.
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Pettersson, Karl. "Secondary Controlled Swing Drive." Thesis, Linköping University, Linköping University, Fluid and Mechanical Engineering Systems, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-19032.

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The purpose of the thesis has been to design and simulate different concepts of a secondary controlled swing drive for a wheel excavator. Secondary control is a known technology in the field of hydraulics that offers precise positioning as well as the possibility of energy recuperation. Secondary control is today used in certain industrial applications and is rather unemployed in mobile machinery. An excavator moves high loads in cyclic motions which are ideal conditions for energy recuperating systems. A study of the potential of a secondary controlled swing drive is therefore interesting. The focus has been on testing different circuit architectures and emergency brake concepts.

The results of the design process have been three types of circuit architectures and two types of hydraulic safety concepts. The results of the simulation have shown that the open and closed circuit architecture have similar energy efficiency. The closed circuit with low pressure accumulator however offers the best controllability. At least 20% energy savings can be achieved by storing thekinetic energy when braking.

A hydraulic emergency brake must function, independent on the direction of rotation of the excavator during a failure. The first principle recognises the rotation direction and changes the swivel angle of the secondary unit so that a braking torque is created. In the second principle a pressure difference is built up over the secondary unit that always results in a braking torque. Simulationshave shown that the principle with recognition of the speed direction is the most effective safety concept.

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Dano, Matej. "Hydrostatický pohon pojezdového ústrojí harvestoru." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2015. http://www.nusl.cz/ntk/nusl-232039.

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The object of this master’s thesis is design of a suitable hydrostatic travel drive for harvester. The first part dedicates of constructions of harvesters and actual different conceptions of travel drive. Next, there are design of hydrostatic circuit, calculation of general hydraulic parameters and design of hydraulic components in the second part. The last part deals with issue of combustion engine and cooler.
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Kamizuru, Yukio [Verfasser]. "Development of Hydrostatic Drive Trains for Wave Energy Converters / Yukio Kamizuru." Aachen : Shaker, 2014. http://d-nb.info/1063265320/34.

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League, Richard B. "Bond graph model and computer simulation of a hydrostatic drive test stand." Thesis, Virginia Polytechnic Institute and State University, 1985. http://hdl.handle.net/10919/50042.

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A hydrostatic drive test stand was constructed to aid in the instruction of the characteristics of hydrostatic transmissions and to develop a time-varying load in a shaft to compare torque transducers. A mathematical model of the device was derived using the bond graph approach and was implemented using the Advanced Continuous Simulation Language (ACSL). The test stand was used to obtain experimental data to try to refine the model parameters. To facilitate the measurement of system flows, a microprocessor-based digital flow indicator was developed. Steady-state tests were performed at various constant pump swashplate angles; for the dynamic tests, the pump swashplate angle was cycled from zero degrees to 6.5 degrees.
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Sun, Hao [Verfasser]. "Decentralised Nonlinear Control for a Hydrostatic Drive Train with Unknown Disturbances / Hao Sun." Aachen : Shaker, 2016. http://d-nb.info/1120863791/34.

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Kolks, Giacomo, and Jürgen Weber. "Electro-hydrostatic compact drives with variable transmission ratio." Technische Universität Dresden, 2020. https://tud.qucosa.de/id/qucosa%3A71209.

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Electro-hydrostatic compact drives are an emerging technology within a range of industrially available translational drive solutions, combining the specific advantages of hydraulic and electromechanical screw drives. Compared to electromechanical screw drives, hydrostatic drives can vary their transmission ratio with comparably little effort, giving them the key advantage of downsizing the electric drive components for a given load cycle. This paper provides a guideline on how to calculate the downsizing potential of electric motors and inverters arising from variable transmission ratio based on the load regime of a given application. Furthermore, a comprehensive systematisation of the actual switching process is described for systems that are switched by means of switching valves. The presented set of methodology is applied to demonstrators in order to validate the general findings.
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Indruch, Jiří. "Stend pro analýzu rekuperace energie v experimentálním vozidle." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2010. http://www.nusl.cz/ntk/nusl-229196.

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The diploma thesis deals with design of an experimental test bench for recovery energy simulation at machines with hydrostatic energy transmission. This work describes choice of connection and selection of hydrostatic and other components. A first part of the thesis deals with calculation and design of the flywheel whose is its rotational kinetic energy corresponds in a certain scale to translational kinetic energy of the experimental vehicle. The thesis outlines the efficiency of transformation of rotational kinetic energy to pressure energy its accumulation and subsequent conversion back to rotational kinetic energy. Precise determination of the effectiveness of hydrostatic recovery is one of the objectives of experiments that will be implemented at the test bench. The task of the measurement and physical-technical analysis to be conducted at the manufactured test bench is primarily to obtain data at for the precise control of the hydrostatic energy recovery system to maximize its efficiency.
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Jonák, Vojtěch. "Návrh mikropojezdu pro harvestor H 40." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2014. http://www.nusl.cz/ntk/nusl-231226.

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This master thesis deals with design of hydrostatic drive for harvester. It contains calculations of parameters from current drive like speed, hydraulic losses and tractive effort. Because now these parameters are insufficient in next part of work is proposed few options how to achieve required parameters. In selected cases are made calculations and based on the results are recommended two options for realization.
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Books on the topic "Hydrostatic drive"

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Study of the kinematic and load sharing properties of wormgearing with non-symmetric tooth profiles. [Washington, DC: National Aeronautics and Space Administration, 1995.

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LAND.TECHNIK AgEng 2019. VDI Verlag, 2019. http://dx.doi.org/10.51202/9783181023617.

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Dieser VDI-Bericht ist ausschließlich als PDF-Dokument erschienen! Content half of it… Analysis of Drive Trains Model-Based Chiptuning Detection of Diesel Engines 1 M. Hinrichs, P. Pickel, John Deere GmbH, Kaiserslautern R. Isermann, Institute of Automatic Control, Darmstadt An Analysis of the Energy Consumption in the High-Pressure System of an Agricultural Tractor through Modeling and Experiment 9 X. Tian, A. Vacca, Purdue University, West Lafayette, IN, USA; S. Fiorati, F. Pintore, CNH Industrial S.p.A, Modena, Italy Multi-Domain Simulation for the Assessment of the NVH Behaviour of a Tractor with Hydrostatic-Mechanical Power Split Transmission 19 G. Pasch, G. Jacobs, G. Höpfner, J. Berroth, Institute for Machine Elements and Systems Engineering, RWTH Aachen University, Aachen Methods to evaluate steering performance of agricultural tractors 29 S. Liljenberg, M. Frederiksen, T. H. Langer, Danfoss Power Solutions, Nordborg, Denmark Tyres and Soil Soil pressure and pulling be...
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Parker, Philip M. The 2007-2012 World Outlook for Manufacturing Gears, Speed Changers, and Industrial High-Speed Drives Excluding Hydrostatic Drives. ICON Group International, Inc., 2006.

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The 2006-2011 World Outlook for Manufacturing Gears, Speed Changers, and Industrial High-Speed Drives Excluding Hydrostatic Drives. Icon Group International, Inc., 2005.

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Book chapters on the topic "Hydrostatic drive"

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Stawiński, Łukasz, Andrzej Kosucki, and Adrian Morawiec. "Hydrostatic Actuator Drive Control with Pump Leakage Compensation." In Lecture Notes in Mechanical Engineering, 179–91. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-59509-8_16.

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Kollek, Wacław, Piotr Osiński, and Kacper Leszczyński. "Assessment of the Effectiveness of Passive and Active Methods in Noise Suppression in Machines and Equipment with the Hydrostatic Drive." In Lecture Notes in Mechanical Engineering, 252–63. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-59509-8_22.

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Rădulescu, Mircea. "The Transmission Coefficient of Hydrostatic Drives." In Power Transmissions, 399–415. Dordrecht: Springer Netherlands, 2013. http://dx.doi.org/10.1007/978-94-007-6558-0_31.

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Thoma, Jean Ulrich. "Simulation of Fluid Power Systems and Hydrostatic Drives." In Simulation by Bondgraphs, 57–79. Berlin, Heidelberg: Springer Berlin Heidelberg, 1990. http://dx.doi.org/10.1007/978-3-642-83922-1_4.

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Boer, G., A. Dodge, K. Fluri, B. H. van der Schoot, E. Verpoorte, and N. F. de Rooij. "Studies of Hydrostatic Pressure Effects in Electrokinetically Driven μTAS." In Micro Total Analysis Systems ’98, 53–56. Dordrecht: Springer Netherlands, 1998. http://dx.doi.org/10.1007/978-94-011-5286-0_12.

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Nishiyama, Masayoshi. "Controlling the Motility of ATP-Driven Molecular Motors Using High Hydrostatic Pressure." In The Role of Water in ATP Hydrolysis Energy Transduction by Protein Machinery, 325–37. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-10-8459-1_19.

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Kaminaga, Hiroshi, Tianyi Ko, Ryo Masumura, Mitsuo Komagata, Shunsuke Sato, Satoshi Yorita, and Yoshihiko Nakamura. "Mechanism and Control of Whole-Body Electro-Hydrostatic Actuator Driven Humanoid Robot Hydra." In Springer Proceedings in Advanced Robotics, 656–65. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-50115-4_57.

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Waniewski, J. "Distributed Model for Fluid Flow Driven by Hydrostatic and Osmotic Pressures during Peritoneal Dialysis." In IFMBE Proceedings, 54–57. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-642-03885-3_15.

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Robertson, Lennart, and Valentin Foltescu. "A Note on Using the Non-hydrostatic Model AROME as a Driver for the MATCH Model." In Integrated Systems of Meso-Meteorological and Chemical Transport Models, 155–57. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-13980-2_14.

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Vardhan, Alok, K. Dasgupta, and Mohit Bhola. "Experimental Study on the Steady-State Performance of Closed-Circuit Hydrostatic Transmission Drives for the Rotary Head of Blast Hole Drill Machine Using Different Capacities Bent Axis Hydro-Motor." In Lecture Notes in Mechanical Engineering, 93–103. Singapore: Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-13-6469-3_9.

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Conference papers on the topic "Hydrostatic drive"

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Müller, Benedikt, and Heiko Baum. "Impedance measurement in a hydrostatic drive." In 12th International Fluid Power Conference. Technische Universität Dresden, 2020. http://dx.doi.org/10.25368/2020.58.

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Knab, Vincent, and Marko Šteger. "Adaptive hydrostatic drive for airport passengers stair." In International conference Fluid Power 2019. University of Maribor Press, 2019. http://dx.doi.org/10.18690/978-961-286-300-5.20.

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Jelovčan, Luka, and Aleš Novak. "Hydrostatic Transmission Design – Closed-loop Trailer Assist Drive." In International conference Fluid Power 2017. University of Maribor Press, 2017. http://dx.doi.org/10.18690/978-961-286-086-8.20.

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Wang, Wei, Dapeng Yang, Zhihua Zheng, and Dezhi Li. "Study on Hydrostatic Drive Technology of Rail Vehicle." In 2019 IEEE 8th International Conference on Fluid Power and Mechatronics (FPM). IEEE, 2019. http://dx.doi.org/10.1109/fpm45753.2019.9035926.

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Zhang, Jiao, and Michael Schwab. "Solution of Excavator Hydrostatic Drive Instability by SNAS Technology." In International Off-Highway & Powerplant Congress. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2002. http://dx.doi.org/10.4271/2002-01-1425.

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Chen, Jincheng, Feng Wang, and Kim A. Stelson. "A Novel Digitalized Hydrostatic Drive Solution for Modern Wind Turbine." In ASME/BATH 2017 Symposium on Fluid Power and Motion Control. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/fpmc2017-4352.

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Gearbox is a concern in modern wind turbines, increasing the maintenance cost and therefore the cost of energy (COE). A hydrostatic transmission (HST) improves the turbine drivetrain reliability by using slightly compressible mineral oil as the working medium rather than a rigid gearbox. An HST eliminates the power converter since it is a continuous variable transmission (CVT), making the turbine simpler and more cost effective. The turbine operates below the rated wind speed for a considerable time in a year, making the variable hydraulic motor run at partial displacement for the most common configuration of a hydrostatic wind turbine, a fixed displacement pump and a variable displacement motor. This results in low drivetrain efficiency. Moreover, large variable displacement motors for megawatt turbine are commercially unavailable. A digitalized hydrostatic drive for a modern wind turbine is proposed to improve the drivetrain efficiency at low wind speeds. The digital coding method for hydrostatic wind turbine is studied. A dynamic simulation model of the digitalized hydrostatic (dHST) wind turbine has been developed in Simulink. A widely used efficiency model for the hydrostatic pump and motors is used in the simulation to make the study practical. The proposed digitalized hydrostatic solution has been compared with a conventional hydrostatic solution. Simulation results show the benefits of digitalized hydrostatic transmission over conventional hydrostatic transmission in drivetrain efficiency, system complexity and cost.
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Guo, Xiaolin, Xuewu Ji, Jibin Hu, Zengxiong Peng, and Chongbo Jing. "Numerical Simulation and Dynamic Characteristics of Secondary Controlled Hydrostatic Drive." In 2007 International Conference on Mechatronics and Automation. IEEE, 2007. http://dx.doi.org/10.1109/icma.2007.4303875.

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Oleg, Tarasov. "The experience of creating compact energy efficiency hydrostatic servo drive." In 2015 International Conference on Fluid Power and Mechatronics (FPM). IEEE, 2015. http://dx.doi.org/10.1109/fpm.2015.7337187.

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Smith, R. J., J. Chen, A. Akers, and D. C. Erbach. "Computer Simulation of a Hydrostatic Drive for a Soil Bin." In International Off-Highway & Powerplant Congress & Exposition. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 1992. http://dx.doi.org/10.4271/921687.

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Yang, Lei, Biao Ma, Heyan Li, and Hailing Zhang. "Steering Fuzzy PID Control for Tracked Vehicle with Hydrostatic Drive." In 2009 International Conference on Computational Intelligence and Software Engineering. IEEE, 2009. http://dx.doi.org/10.1109/cise.2009.5366878.

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