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Добірка наукової літератури з теми "Hydraulic control Testing"

Автор: Grafiati

Опубліковано: 10 грудня 2022

Оновлено: 29 січня 2023

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Статті в журналах з теми "Hydraulic control Testing"

1

Wang, Hua Bing, and Jun Ke Hu. "Durability Testing System with Power Recycle for the Variable Displacement Closed-Loop Hydraulic Pumps." Applied Mechanics and Materials 241-244 (December 2012): 1333–37. http://dx.doi.org/10.4028/www.scientific.net/amm.241-244.1333.

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A testing system scheme with power recycle for hydraulic pumps’ durability is present, which is based on a hydraulic motor with hydraulicly overridden pressure compensation. The hydraulic motor can adaptively adjust its displacement to meet the demand of displacement match of the power feedback in the system. The system pressure can be set by adjusting the starting control pressure of the motor. The rotating speed of the pump is guaranteed by the control of the driven electrical motor. A hydraulic bridge unit is used to guide the flow from the outport of the pump to the fixed inlet port of the hydraulic motor and thus causes the motor to rotate in a certain direction to drive the pump in order to recycle the power.

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2

Petřík, Jan, and Aleš Lufinka. "Hydraulic Exciter Control for Shock and Vibration Testing." Applied Mechanics and Materials 827 (February 2016): 105–8. http://dx.doi.org/10.4028/www.scientific.net/amm.827.105.

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The important part of the validation and certification of the new product are vibration and shock testing of mechanical, electrical and electronic equipment components that are mounted on rail vehicles. The hydraulic shaker is possible to use as the vibration and shock exciter to simulate the effect of the environment to the specimen. It is necessary to fulfil the prescribe condition of the level of mechanical vibration and the acceleration peak of the shock test signals. The specific hydraulic motor produced by INOVA is designed for the specific vibration test and the aim is to use it also for the shock tests. The control algorithm uses two iteration methods in time and frequency domain and their use depends on test prescription.

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3

Lv, Jun. "Honeycomb Multistage Control of Hydraulic Loading Testing Machine." Applied Mechanics and Materials 271-272 (December 2012): 606–10. http://dx.doi.org/10.4028/www.scientific.net/amm.271-272.606.

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Static and dynamic characteristics of the honeycomb paperboard with different size and structure are mechanics research priorities. Study on its mechanical characteristics of the basic way is the basic mechanical properties testing by loading testing machine. In order to get the stability of compressive strength of honeycomb paperboard, compressive strength of honeycomb paperboard models should be tested. Based on the existing equipment, new equipment has been made with new hydraulic systems and control programmes, control accuracy and method has been analyzed. Experimental testing results have shown that the device is credible, and its precision meets to the design requirements. The honeycomb paperboard testing machine not only provides a high pressure range and flexible control equipment, but provides a function of testing sample size effects.

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4

Rybak, A. T., I. K. Tsybriy, S. V. Nosachev, and A. R. Zenin. "Theoretical background of hydraulic drive control system analysis for testing piston hydraulic cylinders." Vestnik of Don State Technical University 19, no. 3 (October 4, 2019): 242–49. http://dx.doi.org/10.23947/1992-5980-2019-19-3-242-249.

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Introduction. The durability and performance of hydraulic machines is determined through life tests. At that, various braking devices (mechanical, electric, hydraulic, etc.) are used for strength loading of the hydraulic motor, as a result of which a significant amount of energy is lost. This can be avoided if the method of rotational motion with energy recovery is used during life tests. This approach is applicable for hydraulic pumps, motors, and hydraulic cylinders.Materials and Methods. A test bench is presented, the design of which provides recreation of the conditions most appropriate for the field operation of hydraulic cylinders. In this case, energy recovery is possible. To solve the research problems, methods of mathematical modeling were used, the basic functional parameters of the proposed design were calculated. The determination of the pressure increment at various points in the hydraulic system is based on the theory of volumetric rigidity. When modeling the motion of the moving elements of the bench hydraulic system, the laws of rotor motion are used.Research Results. In the structure of the test bench, the cylinders in question are located in the pressure main between the hydraulic pump and the hydraulic motor. This enables to significantly reduce the bench itself and to save a significant amount of energy due to its recovery. A basic hydraulic diagram of the test bench for piston hydraulic cylinders is presented, in which the operation of the moving elements of the system is shown. A mathematical modeling of the hydraulic system of the bench is performed. A kinematic diagram of the mechanism for transmitting motion between test cylinders is shown.Discussion and Conclusions. The system of equations presented in the paper shows how the increment of pressure at the selected nodal points of the energy recovery system is determined (in particular, how the increment depends on time, reduced coefficient of volumetric rigidity, operating fluid consumption, and piston areas). The velocities of the hydraulic pistons are determined according to the kinematic scheme of the mechanical transmission of the bench. Thus it can be argued that, thanks to the solution presented in the paper, the life test results of hydraulic cylinders will adequately reflect their operation under rated duties.

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5

Liu, Xiu Juan, Yan Chun Liu, Yue Ming Yang, Kai Zhao, and Yi Zhu. "Fuzzy PID Control of Materials Testing Machine Electrical Hydraulic Servo System." Advanced Materials Research 765-767 (September 2013): 1873–76. http://dx.doi.org/10.4028/www.scientific.net/amr.765-767.1873.

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Material experiment system of hydraulic servo system is subject to load disturbance and load disturbance is a function of standard mechanical parameters of rock samples. Rock mass is very discrete, anisotropy, composition is not single and inelastic[. Traditional tester can't get the complete stress-strain curve of rock[ material, in order to solve the shortage of the traditional hydraulic servo system, in this paper, the fuzzy PID control is successfully applied to the hydraulic servo system, through the experiments and get good effect.

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6

Gu, Feng, Ji Hai Jiang, Fei Meng Diao, Quan Du, Lei Gao, Yan Nan Song, and Yan Li. "The Modeling and Simulation of Hydraulic Actuated Control System of Helicopter in Volumetric Speed Control." Applied Mechanics and Materials 779 (July 2015): 169–74. http://dx.doi.org/10.4028/www.scientific.net/amm.779.169.

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Hydraulic generation system on helicopter generally consists of flight control hydraulic actuating circuit, landing gear retraction/extension hydraulic circuit, and wheel brake circuit. This paper studies on a volumetric speed control system applied in helicopter flight control actuating system. The system performance curve, deduced from the modeling, simulation and testing of the tail-actuating system, reveals that this volumetric speed control system meets the requirements of helicopter control system actuating.

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7

Tayade, Akash L. "Design and Development of Hydraulic Control Valve Testing Machine." International Journal for Research in Applied Science and Engineering Technology 8, no. 10 (October 31, 2020): 217–25. http://dx.doi.org/10.22214/ijraset.2020.31851.

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8

Y.T, WANG, and CHANG C.C. "Comparative Implementations of a Hydraulic-Control Fatigue Testing Machine." JSME International Journal Series C 41, no. 1 (1998): 108–15. http://dx.doi.org/10.1299/jsmec.41.108.

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9

Máchal, Pavel, Zdenko Tkáč, Ján Kosiba, Juraj Jablonický, Ľubomír Hujo, Marián Kučera, and Juraj Tulik. "Design of a laboratory hydraulic device for testing of hydraulic pumps." Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis 61, no. 5 (2013): 1313–19. http://dx.doi.org/10.11118/actaun201361051313.

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Анотація:

The present contribution deals with solves problem of research of testing device to monitor of hydrostatic pumps durability about dynamic loading under laboratory conditions. When carrying out the design of testing device are based on load characteristics of tractor hydraulic circuit, the individual characteristics of hydraulic components and performed calculations. Load characteristics on the tractors CASE IH Magnum 310, JOHN DEERE 8100, ZETOR FORTERRA 114 41 and Fendt 926 Vario were measured. Design of a hydraulic laboratory device is based on the need for testing new types of hydraulic pumps or various types of hydraulic fluids. When creating of hydraulic device we focused on testing hydraulic pumps used in agricultural and forestry tractors. Proportional pressure control valve is an active member of the hydraulic device, which provides change of a continuous control signal into relative pressure of operating fluid. The advantage of a designed hydraulic system is possibility of simulation of dynamic operating loading, which is obtained by measurement under real conditions, and thereby creates laboratory conditions as close to real conditions as possible. The laboratory device is constructed at the Department of Transport and Handling, Faculty of Engineering, Slovak University of Agriculture in Nitra.

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10

Chipka, Jordan, Michael A. Meller, Alexander Volkov, Matthew Bryant, and Ephrahim Garcia. "Linear dynamometer testing of hydraulic artificial muscles with variable recruitment." Journal of Intelligent Material Systems and Structures 28, no. 15 (January 12, 2017): 2051–63. http://dx.doi.org/10.1177/1045389x16682845.

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A novel, meso-scale hydraulic actuator characterization test platform, termed a linear hydraulic actuator characterization device, is demonstrated and characterized in this study. The linear hydraulic actuator characterization device is applied to testing McKibben artificial muscles and is used to show the energy savings due to the implementation of a variable recruitment muscle control scheme. The linear hydraulic actuator characterization device is a hydraulic linear dynamometer that can be controlled to enable a desired force and stroke profile to be prescribed to the artificial muscles. The linear hydraulic actuator characterization device consists of a drive actuator that is connected in series with the test muscles. Thus, the drive cylinder can act as a controlled disturbance to the artificial muscles to simulate various loading conditions. With the ability to control the loading conditions of the artificial muscles, the linear hydraulic actuator characterization device offers the ability to experimentally validate the muscles’ performance and energetic characteristics. For instance, the McKibben muscles’ quasi-static force–stroke capabilities, as well as the power savings of a variable recruitment control scheme, are measured and presented in this work. Moreover, the development and fabrication of this highly versatile characterization test platform for hydraulic actuators is described in this article, and the characterization test results and efficiency study results are presented.

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Більше джерел

Дисертації з теми "Hydraulic control Testing"

1

Hinton, Christopher Eric. "Control of servo-hydraulic materials-testing machines." Thesis, University of Oxford, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.282326.

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2

Karar, Sayed Shehata. "Adaptive force control of hydraulic actuator systems for dynamic structural testing." Thesis, University of Sheffield, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.299026.

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3

Hess, Jeremy. "In-Situ Testing of Uretek's Injectable Barrier as a Mechanism for Groundwater Control." Scholar Commons, 2016. http://scholarcommons.usf.edu/etd/6095.

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Анотація:

Construction projects involving the installation or repair of subsurface structures or utilities often require dewatering to induce a temporary lowering of the local groundwater elevation to facilitate construction. In the event that a known contaminant plume is present in an adjacent area, this dewatering may inadvertently draw the contaminant into the previously uncontaminated work area. Uretek Holdings, Inc. has developed its Injectable BarrierSM to be installed prior to dewatering exercises to provide a groundwater cut-off by reducing the potential movement of groundwater due to the hydraulic gradient induced by dewatering. A benefit of Injectable BarrierSM as compared to conventional methods of hydraulic control is that excavation is not required prior to its installation and no excess soils are generated through its installation. Injectable BarrierSM is a proprietary process registered with the United States Patent and Trademark Office by Uretek Holdings, Inc. Since methodical in-situ testing of the effectiveness of the Injectable BarrierSM has not been performed to date, it was the focus of this research to test the performance of the barrier under in-situ conditions utilizing a subsurface environment indicative of a West-Central Florida location. A testing plot to perform this research was selected on Hillsborough County property in Tampa, Florida which provided both a relatively shallow groundwater elevation in addition to a clay confining layer at a relatively shallow depth, making this an ideal location for testing the performance of the Injectable BarrierSM. After establishing the native conditions through baseline pump testing and repeating the testing procedure following the installation of the Injectable BarrierSM, a quantification of the reduction in hydraulic conductivity was achieved. Pumping tests were performed on the Injectable BarrierSM at its standard spacing as well as modified versions of the barrier with variation in the lateral spacing to include 6 foot, 4 foot, 3 foot, and 2 foot injection patterns to determine if a modified injection process could improve its performance. The 3 foot lateral spacing corresponding to the standard Injectable BarrierSM process indicated a 20% reduction in the hydraulic conductivity following its installation. By performing a small scale excavation following the completion of all pumping tests, it was discovered that the dispersion of the material in the subsurface appeared insufficient to provide the coverage needed to establish a barrier capable of further reducing the local hydraulic conductivity, especially at the shallowest injection depth of 3 feet below land surface (ft bls). It is concluded that modified amounts of injected material, closer lateral injection spacing, and potentially modified injection temperatures and component ratios could increase the effectiveness of the Injectable BarrierSM.

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4

Larsson, Viktor, and L. Viktor Larsson. "Simulation and Testing of Energy Efficient Hydromechanical Drivlines for Construction Equipment." Thesis, Linköpings universitet, Fluida och mekatroniska system, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-107495.

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Анотація:

Increased oil prices and environmental issues have increased a need of loweringthe emissions from and the fuel consumption in heavy construction machines. Anatural solution to these issues is a lowered input power through downsizing ofthe engine. This implies a demand on higher transmission efficiency, in order tominimize the intrusion on vehicle performance. More specifically, alternatives tothe conventional torque converter found in heavier applications today, must beinvestigated. One important part of this is the task of controlling the transmissionwithout jeopardising the advantages associated with the torque converter, such asrobustness and controllability.In this thesis, an alternative transmission concept for a backhoe loader is investigated.The studied concept is referred to as a 2-mode Jarchow power-splittransmission, where a mechanical path is added to a hydrostatic transmission inorder to increase transmission efficiency. The concept is evaluated in computerbased simulations as well as in hardware-in-the-loop simulations, where a physicalhydrostatic transmission is exposed for the loads caused by the vehicle duringvarying conditions. The loads are in turn simulated according to developed modelsof the mechanical parts of the vehicle drive line.In total, the investigated concept can be used instead of the torque converterconcept, if the hydrostatic transmission is properly controlled. The results alsoshow that there is a high possibility that the combustion engine in the backhoeloader can be downsized from 64 kW to 55 kW, which would further increase thefuel savings and reduce the emissions.

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5

Tervalon, Mark J. "Control of a hydraulic dynamometer for engine testing." 1990. http://catalog.hathitrust.org/api/volumes/oclc/23662154.html.

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Thesis (M.S.)--University of Wisconsin--Madison, 1990.
Typescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 57-58).

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6

Huang, Yu-Jen, and 黃裕仁. "Development of Control System of Hydraulic Testing Facility of Wind Turbine Blades." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/94548727769951019991.

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碩士
大葉大學
機械工程研究所碩士班
94
The reserve of petroleum decreases gradually. The development of alternative energies is the most important topic internationally. Among alternative energies, the wind power is the most promising one. The power generating efficiency of a wind turbine depends on aerodynamic characteristics of its blades. Also, the serve life of blades affects the overall cost of power generated. Therefore, structure tests of blades to understand their behavior under loads become necessary. Hydraulic system has been used on lots of kinds of equipments generally. It has many advantages; such as it can provide greater strength and has smaller volume compared to other actuator systems. These advantages make the system become an essential part in industrial applications. In this study, we used a hydraulic system to provide loadings to a blade that simulate the actual wind loading on the blade during operations of a wind turbine. We developed a computer interface to the programmable logic controller that controls the hydraulic system, and then control several valves and hydraulic cylinders of the hydraulic power system to apply loadings to the blade. In the interface, we can control the hydraulic pressure, flow speed, cylinder position of the hydraulic system. An experimental setup for blade test of a 25 kW wind turbine system was designed and installed. Some limit load cases of the blade were also tested in this study.

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7

Chieh-Feng, Lin, and 林杰鋒. "Circuit implementation and control of car shock absorber in testing machine hydraulic system." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/m677vh.

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碩士
國立勤益科技大學
電機工程系
105
In this paper, dynamic analysis and control of a hydraulic system for an automotive shock absorber testing machine is studied. There exists nonlinear phenomenon i.e., chaotic motion, in a hydraulic system, which leads to complicated motion behaviors. This non-periodic motion will then result in unstable system and damage. It is therefore crucial to control and maintain system stability. In this study, a nonlinear hydraulic system model is built by using nonlinear dynamics. Analysis is carried out on a simulated hydraulic system by deriving dynamic equations. Two different control methods are used to improve the chaos phenomena occurring in the system. A PID controller is adopted in the first method, in which a PSO algorithm is used to determine the optimal PID parameters for the nonlinear system. The second method employs Sliding Mode Control (SMC). The two control methods are observed for feasibility and implemented with circuits so that the data matches that of the actual hydraulic system.

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8

林朝厚. "Acceleration Control of an Electro-Hydraulic Material Testing Machine Using the Self-Tuning Adaptive Controller." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/22951220894654011531.

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碩士
國立臺灣科技大學
機械工程系
90
It is difficult to perform the acceleration test of an electro-hydraulic testing machine, because of it's nonlinearities and parametrical variations. In this thesis, a personal computer associated with a digital signal processor is proposed to accomplish the real-time acceleration control. Base on the adaptive control algorithm, a pole assignment self-tuning adaptive controller is developed. System parameters are estimated via the on-line recursive least square with forgetting factor method. The performance of the self-tuning adaptive controller is compared with experimental results of a conventional controller. It is verified that the performance of self-tuning adaptive controller is superior to the conventional controller under different frequency command and the variation of environment condition.

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Книги з теми "Hydraulic control Testing"

1

Boden, Fritz. Advanced In-Flight Measurement Techniques. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013.

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2

Vyas, J. Jaidev, Balamurugan Gopalsamy, and Harshavardhan Joshi. Electro-Hydraulic Actuation Systems: Design, Testing, Identification and Validation. Springer, 2018.

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3

Kompenhans, Jürgen, Fritz Boden, Nicholas Lawson, and Henk W. Jentink. Advanced In-Flight Measurement Techniques. Springer, 2016.

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Частини книг з теми "Hydraulic control Testing"

1

Kasprzyczak, L. M., J. R. Słowik, and Ewald Macha. "A Computer Control System for the Hydraulic Stand MZPK 100 for Biaxial Fatigue Testing." In Solid State Phenomena, 13–18. Stafa: Trans Tech Publications Ltd., 2006. http://dx.doi.org/10.4028/3-908451-21-3.13.

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2

Eiben, Th, G. Guderjahn, and J. Siebert. "Implementation of Interactive Numerical Modeling and Hydraulic Testing in the Design and Quality Control of Low Permeability Barrier Systems." In Computational Methods in Water Resources X, 43–50. Dordrecht: Springer Netherlands, 1994. http://dx.doi.org/10.1007/978-94-010-9204-3_6.

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3

Shao, Ping, Wei Guo, and Chen Zeng. "Application of Model Predictive Control on Real-Time Hybrid Simulation." In Advances in Transdisciplinary Engineering. IOS Press, 2022. http://dx.doi.org/10.3233/atde220113.

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Due to the nonlinear behaviour in hydraulic shake table system and control-structure-interaction (CSI) effect, the phase-lag between displacement command and response can be clearly discovered in time domain. This problem is very crucial since the phase-lag of the actuator control can diminish the testing fidelity and might cause numerical instability in real-time hybrid simulation (RTHS). In this paper, the optimal model-based control algorithm named model predictive control (MPC) is adopted to compensate the time delay of the hydraulic shake table control system. The performance of the newly developed MPC is compared to that of the state-of-the-art PID controller numerically. The results show that the proposed MPC algorithm can successfully improve the tracking performance and time delay issue of the hydraulic shake table control system. This fact makes MPC a great method to implement the hydraulic shake table control part for the RTHS application.

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4

"Development of a method of static compaction for the preparation of a butuminous concrete samples for dynamic creep testing A.MARCHIONNA and G.ROSSI Department of Hydraulics, Transportation and Roads, Rome University, Italy." In Mechanical Tests for Bituminous Mixes - Characterization, Design and Quality Control, 651–66. CRC Press, 1990. http://dx.doi.org/10.1201/9781482267518-52.

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Тези доповідей конференцій з теми "Hydraulic control Testing"

1

Vinatoru, M., and E. Iancu. "The Design of Control Systems for Hydraulic Turbines." In 2006 IEEE International Conference on Automation, Quality and Testing, Robotics. IEEE, 2006. http://dx.doi.org/10.1109/aqtr.2006.254492.

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2

Dubrov, V. I., D. V. Shaykhutdinov, K. M. Shirokov, S. V. Akhmedov, and N. I. Gorbatenko. "Information-measurement system for stend for testing hydraulic products." In 2015 International Siberian Conference on Control and Communications (SIBCON). IEEE, 2015. http://dx.doi.org/10.1109/sibcon.2015.7147317.

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3

Cho, Jaehong, Jimin Lee, Jaeseok Lee, and Panyoung Kim. "Simulation-Aided Testing of Electro-Hydraulic Pump for Excavator." In ASME/BATH 2015 Symposium on Fluid Power and Motion Control. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/fpmc2015-9562.

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This paper presents a concept of pump HIL (Hardware-In the Loop) Simulation system for testing an electro-hydraulic pump of mid-class excavator. The pump HIL Simulation system integrates both the system analysis and the pump bench evaluation technique in order to enable the evaluation of the control performance of the pump during various operating condition with the entire excavator system. Hence, the analytical system model of the excavator is developed for calculating hydraulic load variation which applied to the pump during working cycle. To reflect the real dynamic characteristics of the pump, the pump in the system model is replaced with the real pump of the HIL test-bed. Moreover, linear controller is designed to test the discharge flow tracking performance of the pump and to validate the function of the HIL Simulation system. As a result, the proposed pump HIL Simulation system is verified and more effective for the advanced pump test-bed in the viewpoint of the performance evaluation.

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4

Zuñiga Tello, Ishvari Fernanda, Vito Tič, and Nenad Gubeljak. "Control of Linear Servo Hydraulic High-cycle Fatigue Testing Device." In International conference Fluid Power 2019. University of Maribor Press, 2019. http://dx.doi.org/10.18690/978-961-286-300-5.14.

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5

Petrovič, Aleks, Mihael Janežič, and Vito Tič. "Force control on direct driven servo hydraulic actuator." In International conference Fluid Power 2021. University of Maribor Press, 2021. http://dx.doi.org/10.18690/978-961-286-513-9.16.

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Direct Driven Servo Hydraulic Actuator also known as Pump Direct Driven Cylinder (PDDC) represents a decentralized modern concept of energy efficient cylinder control without damping loses of direction valves. Such systems have many advantages over conventional hydraulic systems and combine benefits of hydraulic and electric drives. PDDC system developed in Laboratory for Oil Hydraulics at University of Maribor consists of hydro motor, which is used as a reversible pump that is directly driven by servomotor and is designed for experimental testing with differential hydraulic cylinder. In this paper, the aforementioned system runs experimental setup for force control of hydraulic cylinder, with load produced by pneumatic bellow.

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6

Cruz, J. M., and J. A. Ferreira. "Testing and Evaluation of Control Strategies for a Prototype Hydraulic Press." In ASME 2003 International Mechanical Engineering Congress and Exposition. ASMEDC, 2003. http://dx.doi.org/10.1115/imece2003-42624.

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The work that this paper describes is the attempt to safely optimize, test and evaluate the performance of advanced strategies for the control of hydraulic systems. The method proposed is to use a computer model of a prototype hydraulic press to develop, optimize and test various controllers. The same tests are then repeated on the actual prototype of the press. The results of the experiments are compared to evaluate the accuracy of the model, the performance of the controllers, and the validity of the method.

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7

Liu, Yinghui, Ernesto Fonseca, Claudia Hackbarth, Ralph Hulseman, and Kenneth N. Tackett II. "A New Generation High-drag Proppant: Prototype Development, Laboratory Testing, and Hydraulic Fracturing Modeling." In SPE Hydraulic Fracturing Technology Conference. SPE, 2015. http://dx.doi.org/10.2118/spe-173338-ms.

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Abstract A new generation alumina ceramic proppant has been developed for higher drag and thus improved settling performance compared to conventional sand or ceramic proppant. Slickwater hydraulic fracture treatments in unconventional gas and tight oil developments are less expensive and less likely to leave residue than cross-linked gel formulations, but due to the lower viscosity, proppant transported with slickwater tends to settle out, likely contributing to screenout of proppant and shorter fracture half length with limited propped height. This novel proppant technology is designed to address the challenges of better proppant placement and increased propped height and half length in slickwater fracturing. This paper describes prototype development of the novel proppant technology, laboratory testing, and hydraulic fracturing modeling. The new proppant is shaped such that it tumbles and flutters during sedimentation in water and this movement greatly reduces settling rate. Finite element structural analysis was conducted to optimize the geometry to achieve higher crush strength while maintaining the conductivity. Laboratory sedimentation tests show a significant increase in settling time of new generation proppant compared to 30-50 sand poppant which had similar size and weight. Hydraulic fracturing modeling shows potential for a significant increase in proppant coverage area. With structurally designed and optimized shapes, this high drag proppant has better transport/placement due to lower settling rates, and enhanced proppant flowback control. Finally, a practical manufacturing process has been identified to enable cost-effective manufacturing of this material.

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8

He, Wenhai. "Testing System of Hydraulic Head of Mine Pump Based on LabVIEW." In 2009 International Asia Conference on Informatics in Control, Automation and Robotics (CAR). IEEE, 2009. http://dx.doi.org/10.1109/car.2009.44.

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9

Ravina, Enrico. "An Oil-Hydraulic Workbench for Advanced Dynamic Testing." In ASME 8th Biennial Conference on Engineering Systems Design and Analysis. ASMEDC, 2006. http://dx.doi.org/10.1115/esda2006-95708.

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The paper refers on a polyvalent oil-hydraulic testbench, designed and realized in order to develop a wide and diversified range of static and dynamic tests on mechanical components and structural elements. The testbench is an experimental mechatronic unit, integrating mechanical equipment, electronic devices and elaboration and control systems, aided by virtual instrumentation. In order to describe the main features and potentialities of the proposed testbench, the paper refers on tests of specific mechanical devices (shock absorbers) and of samples of structural elements (glued junctions). The possible and potential applications of the proposed workbench are very wide and oriented to validation, experimental identification, advanced testing and diagnostics in mechanical field.

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10

Li, Yanfang. "A New Control Algorithm for Hydraulic Universal Testing Machine Based on Extenics." In 2012 4th International Conference on Computational Intelligence and Communication Networks (CICN). IEEE, 2012. http://dx.doi.org/10.1109/cicn.2012.21.

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Звіти організацій з теми "Hydraulic control Testing"

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Sharp, Jeremy A., Duncan B. Bryant, and Gaurav Savant. Low-Sill Control Structure Gate Load Study. U.S. Army Engineer Research and Development Center, May 2022. http://dx.doi.org/10.21079/11681/44340.

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The effort performed here describes the process to determine the gate lifting loads at the Low-Sill Control Structure. To measure the gate loads, a 1:55 Froude-scaled model of the Low-Sill Control Structure was tested. Load cells were placed on 3 of the 11 gates. Tests evaluated the gate loads for various hydraulic heads across the structure. A total of 109 tests were conducted for 14 flows with each flow having two gate settings provided by the United States Army Corps of Engineers, New Orleans District. The load data illustrated the potential for higher gate lifting loads (GLL) to occur at the mid-range gate opening (Go) for Gates 3 and 6. While for Gate 10, the highest GLL (452 kips, maximum load in testing) was at a Go = 4.2 ft. Conversely, for the low-flow bays, the highest load occurred at Go = 24.86 ft.

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2

Forsberg, Charles W., Per F. Peterson, Kumar Sridharan, Lin-wen Hu, Massimiliano Fratoni, and Anil Kant Prinja. Integrated FHR technology development: Tritium management, materials testing, salt chemistry control, thermal hydraulics and neutronics, associated benchmarking and commercial basis. Office of Scientific and Technical Information (OSTI), October 2018. http://dx.doi.org/10.2172/1485415.

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TENSILE BEHAVIOUR OF TMCP Q690D HIGH-STRENGTH STRUCTURAL STEEL AT STRAIN RATES FROM 0.00025 TO 760 S-1. The Hong Kong Institute of Steel Construction, March 2022. http://dx.doi.org/10.18057/ijasc.2022.18.1.7.

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The application of Q690D high-strength structural steel (HSSS) has been increasing in engineering structures. The lack of knowledge of the strain rate behaviour limits the application to the extreme loading conditions such as blast and impact loadings. This paper presents a series of tensile tests on the dynamic tensile behaviour of Q690D HSSS produced through the thermo-mechanical control process (TMCP). The stress-strain relationships of TMCP Q690D in the strain rate range of 0.00025 to 760 s-1 were measured by using the universal and servo-hydraulic high speed testing machines. The experimental results verified the sensitivity to strain rate of TMCP Q690D and the dynamic increase factor (DIF) for yield stress is identical to that of QT (Quenched and Tempered) S690 HSSS. However, TMCP Q690D behaves in a much different way in the strain hardening stage. The commonly-used Cowper-Symonds model was calibrated for the DIFs of yield stress and ultimate tensile strength. The Johnson-Cook (J-C) model was modified and a new rate-dependent constitutive model was proposed. The proposed model was validated successfully to predict the true stress-strain relationship, providing better prediction results than the modified J-C model.

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