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Thematische Bibliographien / CALCULATION OF BASIC PARAMETERS OF HYDRAULIC MOTOR / Zeitschriftenartikel

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Zeitschriftenartikel zum Thema „CALCULATION OF BASIC PARAMETERS OF HYDRAULIC MOTOR“

Autor: Grafiati

Veröffentlicht am 28. Juni 2021

Zuletzt aktualisiert am 11. Februar 2022

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1

Shargorodskiy, Serhiy, and Volodymyr Rutkevych. "INFLUENCE OF PHYSICAL AND MECHANICAL PROPERTIES OF STEM FEED AND DESIGN OF THE WORKING BODY ON THE DRIVE POWER OF THE CUTTING MECHANISM." ENGINEERING, ENERGY, TRANSPORT AIC, no. 2(113) (June 29, 2021): 38–49. http://dx.doi.org/10.37128/2520-6168-2021-2-5.

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The paper considers the problem of reducing the drive power of the mechanism for separating stalk feed from trench storages by the batch method by developing and substantiating the parameters and operating modes of the hydraulic drive system. The structure and principle of construction of a system of hydraulic drives of the mechanism for separating a portion of stem feed are proposed. This will significantly reduce the power of the used hydraulic motors by simultaneously controlling the cutting speed of the monolith of stem feed and the feed of the cutting device. The analysis of changes in th

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Nikolaiev, V. A. "Lower drive of continuous action unit to form underlying layer of road." Russian Automobile and Highway Industry Journal 18, no. 1 (2021): 30–41. http://dx.doi.org/10.26518/2071-7296-2021-18-1-30-41.

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Introduction. A continuous action unit for the formation of an underlying layer is designed to increase productivity in the construction of roads and other facilities, for which it is necessary to remove the top layer of soil. In the bucket of the continuous action unit to form an underlying layer of roads provides the use of working bodies, cutting the ground with blades of knives. The cut-off soil enters the buckets. The forces attached to the bucket are considered. Theoretically reasonable total energy costs for ground cutting of one cubic meter by buckets of continuous action unit to form

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Luo, Zhi Bin. "Calculation of Interaction Force between Pipe and Water of HVAC." Advanced Materials Research 1046 (October 2014): 165–68. http://dx.doi.org/10.4028/www.scientific.net/amr.1046.165.

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On the basis of the pipe network hydraulic calculation of basic theory, the pipe network utilization, using graph theory and peak array build relationships and storage node and pipe sections between the pipeline node associated with the hydraulic parameters of pipe sections linked together establish a common heating pipe network hydraulic calculation models. Matrix for the model were derived solving ideas based on the finite element method and linearization method for existing node equation method to improve to get a new heating network hydraulic calculation methods common to construct a new i

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Zhao, Zhong Hao, Zeng Liang Li, and Sheng Nan Lu. "The Principle and Calculation of Hydraulic Driven Downhole Twin-Screw Pump." Advanced Materials Research 201-203 (February 2011): 448–53. http://dx.doi.org/10.4028/www.scientific.net/amr.201-203.448.

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Structure composition and working principle of hydraulic driven downhole twin-screw pump are firstly introduced, and the calculation method of work and structure parameters when downhole twin-screw pump and turbine motor operate is given, and dynamic measuring process when ground power pump, turbine motor and downhole twin-screw pump coordinate is also given. The given calculation process which is derived after sufficiently considering working principle and structure features of the pump, is instructive to the design of this kind of downhole twin-screw pump, and also provides technical support

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Jonkobilov, Ulugmurad, Sobir Jonkobilov, Ulugbek Rajabov, Toshburi Egamnazarov, and Shuhrat Xo’shiyev. "Analytical substantiation of the parameters of the directional air-hydraulic hood." E3S Web of Conferences 264 (2021): 03034. http://dx.doi.org/10.1051/e3sconf/202126403034.

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The article is about to the calculation of the main technical parameters of the directional air-hydraulic hood. It is accepted as a mathematical model of wave equations of hyperbolic type as applied to pressure pipelines of pumping stations, and analytical solutions of wave equations for different values of the polytropic exponents are proposed. Water hammer poses a danger to the normal operation of the main equipment of stations, control and measuring equipment, control devices and pressure pipelines. To damp the intensity of water hammer in the pressure pipelines of pumping stations, we have

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Hou, Jiaoyi, Hongyu Sun, Aoyu Xu, Yongjun Gong, and Dayong Ning. "Fault diagnosis of synchronous hydraulic motor based on acoustic signals." Advances in Mechanical Engineering 12, no. 4 (2020): 168781402091610. http://dx.doi.org/10.1177/1687814020916107.

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Synchronous hydraulic motors are used in high load conditions. Therefore, the failure of such motors must be promptly detected to avoid severe accidents and economic loss. The automation of signal processing and diagnostic processes in practical engineering applications can help improve engineering efficiency and reduce hazards. As a non-contact acquisition signal, an acoustic signal has easier acquisition than a vibration signal. This article proposes an automatic fault detection method for synchronous hydraulic motors, which uses acoustic signals. The proposed method includes the automatic c

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Blashchuk, M. Yu, Anton A. Kazantsev, and R. V. Chernukhin. "Capacity Calculation of Hydraulic Motors in Geokhod Systems for Justification of Energy-Power Block Parameters." Applied Mechanics and Materials 682 (October 2014): 418–25. http://dx.doi.org/10.4028/www.scientific.net/amm.682.418.

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The paper provides description of an approach to calculate main parameters of energy-power block of geokhod computing the hydraulic motor capacity of each end user. The paper determines the effect of geokhod dimensions on capacity consumption by main geokhod systems. The shares of capacity consumed in each geokhod system are calculated.

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Wu, Bao Gui, Shu Fa Yan, and Shao Ping Li. "Hydraulic Excavator Working Device Simulation Based on Virtual Prototype." Advanced Materials Research 1037 (October 2014): 49–52. http://dx.doi.org/10.4028/www.scientific.net/amr.1037.49.

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In order to observe the kinematic characteristic and dynamic characteristic of working state of hydraulic excavator, and aim at the complexity and time consuming of the numerical calculation and field test, the hydraulic excavator working device motion simulation and analysis scheme is put forward. By kinematics simulation, the envelope trajectory of the manipulator and the basic working parameters are got; by dynamics simulation, the force of each hinge in symmetrical and offset loadings is got, and the most hazardous working condition and hinge are determined. Thus provided the basis for str

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Hu, Kai, and Wenyi Zhang. "Design and simulation for driving system and steering system of hydraulic chassis of rice transplanter." Advances in Mechanical Engineering 10, no. 10 (2018): 168781401880890. http://dx.doi.org/10.1177/1687814018808901.

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A new hydraulic chassis of rice transplanter is designed based on the paddy machinery operation requirements. Driving system adopts single pump four-motor scheme, and the anti-slide valve group is used to prevent the slippage of the shunt-wound hydraulic motors. Hydraulic steering system adopts single-way stable diverter valve for ensuring its response in time. Then, hydraulic system and components parameters are designed and calculated. The driving resistance and average slip rate are measured in paddy field. The experimental data verifies the correctness of theoretical calculation. The desig

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Milecki, Andrzej, and Dominik Rybarczyk. "Modeling and Control of Proportional Valve with Synchronous Motor." Solid State Phenomena 220-221 (January 2015): 457–62. http://dx.doi.org/10.4028/www.scientific.net/ssp.220-221.457.

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The paper describes the research results of modeling and control of proportional valve with synchronous motor type PMSM (Permanent Magnets Synchronous Motor). In the paper, a simulation model of the proposed valve was developed and described. The model included the square root flow characteristics, nonlinearity of the hydraulic actuator, valve dead zone and saturation of the flow. The study included the investigations of the basic characteristics, such as valve flow characteristic and step responses. In order to determine the basic parameters of the valve, the test stand was built, on which th

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Ashizawa, Satoshi, Toshiya Watanabe, Yuki Kamiya, Hidenori Aoki, and Takeo Oomichi. "Development of the Energy Simulator for the Water Hydraulic System Under Flow Condition Changes." Journal of Robotics and Mechatronics 23, no. 3 (2011): 416–25. http://dx.doi.org/10.20965/jrm.2011.p0416.

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The new energy simulator we developed is based on a hydraulic servosystem dynamic flow model introducing flow coefficients determined by Reynolds number. One is the pipe flow coefficient flow determined by the Moody diagram and the other is the servovalve flow coefficient based on flow model experiments. The motor dynamic model is introduced to determine efficiency such as coil resistance or rotor viscosity loss. Leakage of the hydraulic servovalve was also determined by the leak model. The feasibility of the proposed simulator was verified using computer simulation and experiments, showing di

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Zhang, Cheng Hu, Na Meng, and De Xing Sun. "Anti-Blocking Technology for Urban Sewage Source Heat Pump System." Advanced Materials Research 472-475 (February 2012): 637–40. http://dx.doi.org/10.4028/www.scientific.net/amr.472-475.637.

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The extremely poor sewage quality could make the sewage heat utilization difficult. The paper introduces the content and distribution property of the sewage dirt. For the dirt properties and project experience, it proposes the two basic points of the anti-blocking technique in sewage source heat pump system: filtering surface continuous regeneration and dirt continuous reduction and the request for filtering pore size parameters. It also describes the principle of filtering surface hydraulic continuous regenerative technique and establishes its mathematical model and design method of the devic

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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 (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 fo

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Polansky, Jiri. "Thermodynamics Cycle of Gas-Cooled Fast Reactor." Mechanics and Mechanical Engineering 22, no. 2 (2020): 585–92. http://dx.doi.org/10.2478/mme-2018-0046.

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AbstractThis paper deals with the thermo-hydraulic aspect of gas cooled fast 4 generation reactor. The paper is focused on the comparison of direct and indirect strategy of thermodynamics cycle of helium cooled reactor from the thermodynamics and turbomachinary point of view. The analyses respect pressure looses at all major part of the equipment - reactor, heat exchanger, pipe lines, etc. The compressor and gas turbines efficiency are includes in calculation as well. The working fluid in primary circuit is helium. In the secondary circuit a mixture of helium and nitrogen is considered. The Cy

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Liang, Yijie, Tongjian Wang, Xin Wang, Weiquan Liang, and Xinhui Liu. "Simulation research on hydraulic hybrid assistant beam pumping unit." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 230, no. 11 (2015): 1795–804. http://dx.doi.org/10.1177/0954406215584631.

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Conventional beam pumping units have occupied an important position in oilfield equipment due to such characteristics as simple structure, high reliability, simple operation, easy maintenance, and so on. In fact, there are about 90,000 sets of beam pumping units in China. However, the unbalanced structure of the beam pumping units cannot be entirely eliminated because of the inherent geometry and mechanical properties of four-bar linkage, that is the electromotor equivalent torque ripple cannot be absorbed or eliminated by counterweight in up-and-down travels, which causes the electromotor to

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Jin, Xiao Hong, Xian Bao Xiang, Lin Jiang, and Qin Fen Miao. "Rollback and Compensation for an Easy Control Hydraulic Servo Joint." Applied Mechanics and Materials 312 (February 2013): 662–66. http://dx.doi.org/10.4028/www.scientific.net/amm.312.662.

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The easy control hydraulic servo joint is a key element for a reconfigurable robot and its response and control accuracy determine the performance of the robot. With the stepping motor as the input element the main parts of joint includes a rotational valve with the double orifice and the single-vane actuator. The basic structure and the working principle of joint are introduced. The mathematic model is established and the dynamic responses are analysed by using the digit simulation. From the results of simulation, a phenomenon of rollback in the process of response of joint is observed. With

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Lefik, Marcin, and Zbigniew Gmyrek. "Numerical modelling of a flux-barrier SynchRel motor including punching effect." COMPEL - The international journal for computation and mathematics in electrical and electronic engineering 35, no. 6 (2016): 2022–34. http://dx.doi.org/10.1108/compel-03-2016-0090.

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Purpose Estimating the punching process’s impact on the operating parameters of an electrical motor is a special problem especially in the case of fractional power motors. The purpose of this paper is to discuss a method of numerical modelling that is useful for this case. Design/methodology/approach The proposed multi-physical FEM approach is based on using professional software in the process of modelling and determining the operating parameters of a low power motor. The basic elements of the approach are built FEM models for which the parameters characterising the damaged portions of the ma

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Pryshlyak, Viktor, and Viktor Dubchak. "FINDING THE SIZE OF PRESSURE FORCE ON UNDERWATER HYDRAULIC STRUCTURES IN DESIGN AND AGRICULTURAL TRAINING OF SPECIALISTS." ENGINEERING, ENERGY, TRANSPORT AIC, no. 1(108) (August 27, 2020): 111–22. http://dx.doi.org/10.37128/2520-6168-2020-1-13.

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The article presents the results of scientific analytical studies that provide finding the pressure force on underwater hydraulic structures, such as, dams of hydroelectric power stations, sedimentation tanks for liquid organic fertilizers, sewage, coastal fortifications of lakes, rivers, ponds, etc. Practical experience in industrial and pedagogical activity and the analysis of inventive and scientific research of domestic as well as foreign scientists showed that constructive, technological and economic feasibility, operational safety of underwater hydraulic structures requires further analy

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Benedek, Kálmán, and Gyula Dankó. "Stochastic hydrogeological modelling of fractured rocks: a generic case study in the Mórágy Granite Formation (South Hungary)." Geologica Carpathica 60, no. 4 (2009): 271–81. http://dx.doi.org/10.2478/v10096-009-0019-y.

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Stochastic hydrogeological modelling of fractured rocks: a generic case study in the Mórágy Granite Formation (South Hungary)In connection with the Hungarian radioactive waste disposal program a detailed study of the mass properties of the potential host rock (granite) has been carried out. Using the results of this study the various parameters (orientation, length, intensity, transmissivity, etc.) describing a fracture set were estimated on the basis of statistical considerations. These estimates served as basic input parameters for stochastic hydrogeological modelling of discrete fracture ne

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A S, Sharan, Somashekhar S. Hiremath, C. S. Venkatesha, and S. Karunanidhi. "Investigation on the critical parameters affecting the working design dynamics of a torque motor employed in an electro-hydraulic servovalve." SIMULATION 95, no. 1 (2018): 31–49. http://dx.doi.org/10.1177/0037549718759187.

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The torque motor is an intricate assembly in electro-hydraulic technology and plays a crucial role in converting the electrical signal into controlled mechanical output signal. It involves many precise components, such as the feedback spring, armature and its coil, permanent magnet, feed pipe, flexure shaft, jetpipe, and flexure support. The components are embedded together as a single operating component. Each component contributes to the effective dynamics of the system. The present paper proposes a novel approach to investigate the effect of critical parameters on the working design dynamic

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Wang, Xu, and Xin Ma. "Preliminary results of the “four-dimensional six degrees-of-freedom” gait simulation system improvement." Foot & Ankle Orthopaedics 3, no. 3 (2018): 2473011418S0051. http://dx.doi.org/10.1177/2473011418s00510.

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Category: Basic Sciences/Biologics Introduction/Purpose: Using computer-controlled electro-hydraulic servo technology, we studied the improved “four-dimensional six degrees-of-freedom” gait simulation system based on motor and hydraulic hybrid drive control and achieved the human body’s normal gait cycle with fresh cadavers Methods: Through the superimposed combination of a composite servo motor drive mechanism, a highly precise “four-dimensional six degrees-of-freedom” at the tibia could be achieved using fresh cadavers below the knee. At the same time, ten sets of independently controlled el

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Knypiński, Łukasz. "Optimal design of the rotor geometry of line-start permanent magnet synchronous motor using the bat algorithm." Open Physics 15, no. 1 (2017): 965–70. http://dx.doi.org/10.1515/phys-2017-0119.

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AbstractIn this paper an algorithm for the optimization of excitation system of line-start permanent magnet synchronous motors will be presented. For the basis of this algorithm, software was developed in the Borland Delphi environment. The software consists of two independent modules: an optimization solver, and a module including the mathematical model of a synchronous motor with a self-start ability. The optimization module contains the bat algorithm procedure. The mathematical model of the motor has been developed in an Ansys Maxwell environment. In order to determine the functional parame

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Wang, Aihong, Zhenfeng Lv, Youshan Gao, Long Quan, and Jiahai Huang. "Potential energy recovery scheme with variable displacement asymmetric axial piston pump." Proceedings of the Institution of Mechanical Engineers, Part I: Journal of Systems and Control Engineering 234, no. 8 (2019): 875–87. http://dx.doi.org/10.1177/0959651819885208.

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Hydraulic systems are widely used in construction machinery and equipment. However, the energy efficiency of hydraulic system is low. In many cases, hydraulic systems output energy to lift the working device. During the lowering process, the potential energy is commonly wasted through the throttling loss of the control valve. Recovering the potential energy is an efficient way to improve the hydraulic system efficiency. In this article, theoretical analysis, simulation calculation, and experimental verification were used to study the energy recovery efficiency of a differential cylinder system

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A, Mulenkova, and Demchenko I.I. "On the parameters of an industrial motor vehicle designed to transport sized coal out of the face of an open pit." Izvestiya vysshikh uchebnykh zavedenii Gornyi zhurnal 1, no. 1 (2019): 6–13. http://dx.doi.org/10.21440/0536-1028-2019-1-6-13.

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Introduction. Sized coal production in the face of an open pit allows to reduce its prime cost by reducing transfers and backhauls. At that, the maintenance of the quantitative and qualitative characteristics of the produced coal is highly significant. For this purpose it is suggested that the coal’s transfer from the face to the daylight surface ought to be carried out in specialized containers installed on an industrial motor vehicle being the initial link in the resource-saving and ecological technology of sized coal transportation out of the face of an open pit. The research aims to determ

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Stryczek, Jarosław, and Piotr Stryczek. "Synthetic Approach to the Design, Manufacturing and Examination of Gerotor and Orbital Hydraulic Machines." Energies 14, no. 3 (2021): 624. http://dx.doi.org/10.3390/en14030624.

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Gerotor technology is an important research area in the field of hydraulics which attracts the attention of both academic scientists and industry. Despite the numerous publications announced by academics, as well as a considerable number of projects made by industry, the subject has not been exhausted. This paper presents a new approach to gerotor technology which has been formed by gathering the authors’ knowledge of gerotors in a synthetic form. The following scientific and technical results have been obtained: (1) A uniform system of parameters and basic concepts regarding toothing and cycl

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Guo, Hai Qing, Bo Wen, and Xiao Feng Bai. "Study of Seepage Properties of Fractured Rock Mass Based on Improved K-Means Clustering Algorithm." Applied Mechanics and Materials 405-408 (September 2013): 310–15. http://dx.doi.org/10.4028/www.scientific.net/amm.405-408.310.

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Seepage properties of fractured rock mass are of prime importance for hydraulic engineering and accurate description of rock fracture geometry parameters is an important and basic task in rock hydraulics. In this paper, an improved K-means clustering algorithm for structural plane of fractured rock mass was first brought forward and the corresponding Matlab program for discontinuity orientations partitioning was compiled and then used in the fitting analysis of dominant orientations of certain dam foundation rock mass. On this basis, combining calculation formulas of multi-group fractures, the

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Świć, Antoni, Victor Taranenko, and Arkadiusz Gola. "Analysis of the Process of Turning of Low-Rigidity Shafts." Applied Mechanics and Materials 791 (September 2015): 238–45. http://dx.doi.org/10.4028/www.scientific.net/amm.791.238.

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A machining station, working together with a lathe, was designed and constructed for the stabilisation of the axis of low-rigidity parts in the process of machining. The basic element is a self-centring lunette with hydraulic drive, allowing part centring without any preliminary alignment. The methodology of calculation of the parameters of the “semi-finished product/supports” subsystem is given. The effect of various schematics of support arrangements on the dynamics of the semi-finished product was analysed. The analysis of schemes of low-rigidity part fixing in the device for the stabilisat

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Yu, Guojun, Sheng Jia, and Yanting Geng. "Numerical Investigation into the Two-Phase Convective Heat Transfer within the Hold of an Oil Tanker Subjected to a Rolling Motion." Journal of Marine Science and Engineering 7, no. 4 (2019): 94. http://dx.doi.org/10.3390/jmse7040094.

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A crude oil tanker usually encounters a rolling motion during sea transportation, which leads to rotational movement and sometimes a sloshing of the liquid hold. This rolling-induced body motion seriously affects the thermal and hydraulic behavior of the liquid hold, which then affects the heating process and heat preservation of the tanker. Clarification of the involved thermal and hydraulic characteristics is the basic requirement for establishment of a scientific heating scheme and heat preservation method. A two-phase 3D model considering the free liquid surface and non-Newtonian behavior

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Riedler, Martin, Martin Stockinger, Michael Stoschka, and Wilfried Eichlseder. "Fatigue Analysis of Forged Aerospace Components Based on Micro Structural Parameters." Key Engineering Materials 348-349 (September 2007): 185–88. http://dx.doi.org/10.4028/www.scientific.net/kem.348-349.185.

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With the objective of creating a simulation model for the lifetime calculation of forged aerospace components it is necessary to clarify the damage mechanisms in the materials used. This has been researched for the Ni-base alloy Inconel 718 by varying the forging parameter effective plastic strain rate, which is realised by using three types of equipment: hydraulic press, screw press and hammer. Specimens processed at the screw press show the highest lifetime by keeping all other forging parameters unvaried. Micro structural investigations show that the amount and morphology of dominant as-lar

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Skorek, Grzegorz. "Study of Losses and Energy Efficiency of Hydrostatic Drives with Hydraulic Cylinder." Polish Maritime Research 25, no. 4 (2018): 114–28. http://dx.doi.org/10.2478/pomr-2018-0138.

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Abstract Energy efficiency of hydrostatic transmissions, and especially efficiencies of drives with motor speed controlled by throttle, as well as efficiency of hydraulic servomechanisms can in fact be higher than the efficiency values most frequently given by the respective literature in this field. With the progress achieved in recent years in the development of hydraulic systems it is becoming necessary to develop methods for precise energy efficiency calculation of such systems. It is difficult to imagine that more and more, better and better machines and control elements could be used wit

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Novikov, S. G., V. N. Kutsenko, V. V. Malykhin, and R. W. Glagolev. "HYDRO-PULSE DEVICE FOR OBTAINING HIGH-PRESSURE LIQUID-CURRENT PRESSURES AND THE THEORETICAL ANALYSIS OF ITS WORK." Proceedings of the Southwest State University 22, no. 6 (2019): 30–39. http://dx.doi.org/10.21869/2223-1560-2018-22-6-30-39.

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Unsteady processes in the working fluid lead to the receipt of both hydraulic impulses and hydraulic shocks, the energy of which is currently used in a number of devices and machines. In hydraulic vibratory presses, hydraulic hammers, hammers and hydraulic perforators, the creation of significant pulses is necessary to ensure their basic functions. Hydraulic impact is used in hydrotarans for water lifting and rock destruction, drilling units for drilling wells with the help of a longitudinal shock impulse, hydroimpulse plants for cleaning surplus materials (liquidations), causing irregularitie

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Dewantoro, Gunawan. "Multi-objective Optimization Scheme for PID-Controlled DC Motor." International Journal of Power Electronics and Drive Systems (IJPEDS) 7, no. 3 (2016): 734. http://dx.doi.org/10.11591/ijpeds.v7.i3.pp734-742.

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DC Motor is the most basic electro-mechanical equipment and well-known for its merit and simplicity. The performance of DC motor is assessed based on several qualities that are most-likely contradictory each other, i.e. settling time and overshoot percentage. Most of controllers optimization problems are multi-objective in nature since they normally have several conflicting objectives that must be met simultaneously. In this study, the grey relational analysis (GRA) was combined with Taguchi method to search the optimum PID parameter for multi-objective problem. First, a L<sub>9 </sub

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SHLYAPKIN, Alexey S., and Alexey V. TATOSOV. "NUMERICAL AND PROGRAM IMPLEMENTATION OF A ONE-DIMENSIONAL MATHEMATICAL MODEL OF HYDRAULIC FRACTURING." Tyumen State University Herald. Physical and Mathematical Modeling. Oil, Gas, Energy 7, no. 1 (2021): 126–45. http://dx.doi.org/10.21684/2411-7978-2021-7-1-126-145.

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At present, an active policy of import substitution is being pursued, dictated by the imposed international sanctions, which creates a need for finding optimal engineering solutions, in particular, in the field of creating Russian software. In the study and design of hydraulic fracturing, they often rely on the results of modeling in specialized simulators. The appearance of the Russian products on the software market, surely, sets the correct vector of development; however, some aspects are not implemented in the existing mathematical models. The authors of this article present a model that a

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Jeong, Heon-Sul, and Hyoung-Eui Kim. "Experimental Based Analysis of the Pressure Control Characteristics of an Oil Hydraulic Three-Way On/Off Solenoid Valve Controlled by PWM Signal." Journal of Dynamic Systems, Measurement, and Control 124, no. 1 (2001): 196–205. http://dx.doi.org/10.1115/1.1433483.

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Pressure control characteristics of a three-way high-speed on/off oil hydraulic solenoid valve driven by a PWM signal with a fixed pulse period were theoretically and experimentally analyzed and evaluated. By virtue of its relatively low cost, small size, robustness to contamination, and simplicity of the driving circuit, the three-way on/off solenoid valve is increasingly and widely used for hydraulic pressure or position control applications. In this paper, two formulas are newly derived for the mean and the ripple amplitude of the system pressure that oscillates with the same frequency as t

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Mokaramian, Amir, Vamegh Rasouli, and Gary Cavanough. "Fluid Flow Investigation through Small Turbodrill for Optimal Performance." Mechanical Engineering Research 3, no. 1 (2013): 1. http://dx.doi.org/10.5539/mer.v3n1p1.

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Basic design methodology for a new small multistage Turbodrill (turbine down hole motor) optimized for small size Coiled Tube (CT) Turbodrilling system for deep hard rocks mineral exploration drilling is presented. Turbodrill is a type of axial turbomachinery which has multistage of stators and rotors. It converts the hydraulic power provided by the drilling fluid (pumped from surface) to mechanical power through turbine motor. For the first time, new small diameter (5-6 cm OD) water Turbodrill with high optimum rotation speed of higher than 2,000 revolutions per minute (rpm) were designed thr

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Nalepa, Radosław, Karol Najdek, Karol Wróbel, and Krzysztof Szabat. "Application of D-Decomposition Technique to Selection of Controller Parameters for a Two-Mass Drive System." Energies 13, no. 24 (2020): 6614. http://dx.doi.org/10.3390/en13246614.

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In this work, issues related to the application of the D-decomposition technique to selection of the controller parameters for a drive system with flexibility are presented. In the introduction the commonly used control structures dedicated to two-mass drive systems are described. Then the mathematical model as well as control structure are introduced. The considered structure has only basic feedbacks from the motor speed and PI type controller. Due to the order of the closed-loop system, the free location of the system’s poles is not possible. Large oscillations can be expected in responses o

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Anshakov, G. P., A. V. Krestina, and I. S. Tkachenko. "Analysis of the effectiveness of the de-orbiting devices for small satellite." Spacecrafts & Technologies 4, no. 2 (2020): 72–84. http://dx.doi.org/10.26732/j.st.2020.2.02.

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At present, the use of various methods is proposed for the de-orbit of small satellite, and the most feasible and promising of them are analyzed. The task of evaluating the effectiveness of the de-orbiting system for small satellite is set, in the framework of which a criterion and basic performance indicators are formed taking into account design features. As a methodological basis for evaluating the effectiveness, the method of relative integral assessment was used. Using the developed algorithm for calculating the coefficients of the integral relative assessment for each de-orbiting method,

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Оганян, Игорь Валериевич. "МАТЕМАТИЧЕСКАЯ МОДЕЛЬ ТОПЛИВНОГО НАСОСА-РЕГУЛЯТОРА ТУРБОВАЛЬНОГО ДВИГАТЕЛЯ ВЕРТОЛЕТА". Aerospace technic and technology, № 7 (31 серпня 2020): 105–12. http://dx.doi.org/10.32620/aktt.2020.7.15.

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This article discusses the relevance of creating a mathematical model of a hydromechanical fuel regulator as the main component of the parametric diagnostics method. To understand the processes occurring during the operation of the fuel regulator, this article provides a brief description of its operation. Based on the problems solved by the diagnostic methods and the features of the fuel regulator, the basic requirements for its mathematical model are formulated and the structure of this model is determined. Several assumptions are made (one-dimensional flow of the working fluid and its zero

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Wei, Jingliang, and Xianwen Gao. "Electric-Parameter-Based Inversion of Dynamometer Card Using Hybrid Modeling for Beam Pumping System." Mathematical Problems in Engineering 2018 (June 27, 2018): 1–12. http://dx.doi.org/10.1155/2018/6730905.

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Conventional fault diagnosis and production calculation of an oil well can be conducted with the surface dynamometer cards, which are obtained by load sensor installed on the horse head. This method to measure the dynamometer cards is limited by the sensor maintenance and calibration, battery replacement, and safety hazards for staff. As the basic parameter of the oil extraction industry, electric parameters have the advantages of low cost and high efficiency. So the inversions of dynamometer card with electric parameters are attracting more and more attention. In order to solve the problem of

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Kawasaki, Haruhisa. "Special Issue on Analysis and Simulation Systems for Robotics and Mechatronics." Journal of Robotics and Mechatronics 10, no. 6 (1998): 463. http://dx.doi.org/10.20965/jrm.1998.p0463.

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Superior analysis and simulation systems play an important part in robotics and mechatronics R&D. Developing apparatuses involves repeating planning, trial manufacture, experiments, analysis, and improvement. Simulation and analysis are now executed before trial manufacture, decreasing the number of trial manufacture, shortening development, and cutting development cost. Virtual reality is often applied to simulation, and commercialization without trial manufactures will eventually be possible. Most commercialized simulation software are being improved for general use based on software mad

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Kozłowski, Maciej. "Simulation method for determining traction power of ATN–PRT vehicle." Transport 33, no. 2 (2016): 335–43. http://dx.doi.org/10.3846/16484142.2016.1217429.

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The construction of Personal Rapid Transit (PRT) vehicle made within the framework of Eco-Mobility project has been described in the present paper. Key features of the vehicles were identified – e.g. drive with three-phase linear motor with winding on the vehicle and fixed rotor in the road surface, contactless dynamic vehicle powering. Attention was paid to the difference in dynamic properties compared to rail vehicles, related to the lack of the so-called ‘centering mechanism’. A development of a nominal model for the analysis of vehicle drive properties was presented. Results of simulation

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Settari, A. "A New General Model of Fluid Loss in Hydraulic Fracturing." Society of Petroleum Engineers Journal 25, no. 04 (1985): 491–501. http://dx.doi.org/10.2118/11625-pa.

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Abstract This paper gives a new formulation of fluid loss in hydraulic fracturing that is much more general than the classical theory while retaining its simplicity. The model allows many parameters to vary during filtration and can, therefore, simulate nonlinear effects. The model has been validated against laboratory data for Newtonian fluids and crosslinked gels. The results show that the finite length of the core, viscosity screenout, and shear sensitivity are important parameters that can be represented by the model. The standard analysis gives values of leakoff coefficients that will giv

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Antypas, I. R., A. G. Dyachenko, and B. I. Saed. "Inverse analysis method for mathematical modeling of hydrodynamic ballast in a drilling rig." Advanced Engineering Research 21, no. 1 (2021): 43–54. http://dx.doi.org/10.23947/2687-1653-2021-21-1-43-54.

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Introduction. When organizing drilling operations, one of the major problems is the accuracy and smoothness of lowering bundles of pipes into the shaft of the drilling rig. This depends on many factors, including the operation of the hydraulic brake of the lifting device. The objectives of this work are to create and study a mathematical model of hydrodynamic ballast in a drilling rig. Using the inverse analysis method, the effect of some performance indicators on the braking torque of the hydraulic brake is studied.Materials and Methods. The experiments were performed using a laboratory setup

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Liu, Mengkai, Qiuyi Fan, and Hui Guo. "Frazil ice jam risk assessment method for water transfer projects based on design scheme." Water Supply 20, no. 8 (2020): 3038–51. http://dx.doi.org/10.2166/ws.2020.201.

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Abstract Frazil ice jam risk assessment is an important method to improve the operational safety of water transfer projects. A frazil ice jam assessment method was developed based on project design conditions to ensure the risk level of frazil ice jam. A frazil ice jam risk assessment indicator system was incorporated into the method that included three first-level indicators, such as ice production, special hydraulic structure and basic design parameters, and 17 third-level indicators for calculation analysis. Then, a standard assessment system was proposed, and an analytic hierarchy process

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Belyanovskaya, Elena, Roman Lytovchenko, Kostyantyn Sukhyy, Mikhaylo Sukhyy, Mykhailo Gubynskyi, and Irina Sykha. "Performance of adsorptive heat-moisture regenerator." Scientific Works 84, no. 1 (2020): 98–103. http://dx.doi.org/10.15673/swonaft.v84i1.1877.

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The performance of the adsorptive heat-moisture regenerators based on the composite materials ‘silica gel - sodium acetate’ and ‘silica gel – sodium sulphate’ have been studied. The mathematical model and algorithm for determining the basic operating parameters of adsorptive regenerator in the housing and communal services sector have been further developed. The proposed algorithm which involves calculating the air volume passed through the adsorbent layer, the final absolute humidity of air near the outlet from the regenerator, the adsorption and the heat of adsorption during inflow and outfl

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Dmitriev, S. M., A. E. Khrobostov, A. A. Barinov, and V. G. Glavny. "DEVELOPMENT AND ADAPTATION OF VORTEX REALIZABLE MEASUREMENT SYSTEM FOR BENCHMARK TEST WITH LARGE SCALE MODEL OF NUCLEAR REACTOR." Devices and Methods of Measurements 8, no. 3 (2017): 203–13. http://dx.doi.org/10.21122/2220-9506-2017-8-3-203-213.

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The last decades development of applied calculation methods of nuclear reactor thermal and hydraulic processes are marked by the rapid growth of the High Performance Computing (HPC), which contribute to the active introduction of Computational Fluid Dynamics (CFD). The use of such programs to justify technical and economic parameters and especially the safety of nuclear reactors requires comprehensive verification of mathematical models and CFD programs. The aim of the work was the development and adaptation of a measuring system having the characteristics necessary for its application in the

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Kashkanov, Andriy, Serhiy Reiko, Vasyl Diorditsa, Vitaliy Kashkanov, and Anastasia Kashkanova. "Improving the quality of auto-technical examination of road accidents in conditions of composition uncertainty." Journal of Mechanical Engineering and Transport 12, no. 2 (2021): 61–67. http://dx.doi.org/10.31649/2413-4503-2020-12-2-61-67.

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Decision-making in solving the problems of auto technical examination of road accidents (road accidents) is carried out in conditions of incomplete information, ie in conditions of uncertainty, which may be stochastic or fuzzy in nature, and therefore is compositional. When forming expert opinions of auto technical examination of road accident the general uncertainty is formed due to uncertainty of the chosen structure of model of road accident, experimental data, error of measuring devices, adequacy of model of road accident, uncertainty of indications of witnesses and other proofs, competenc

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Timoshenko, V. I., V. P. Halynskyi, and Yu V. Knyshenko. "Theoretical studies on rocket/space hardware aerogas dynamics." Technical mechanics 2021, no. 2 (2021): 46–59. http://dx.doi.org/10.15407/itm2021.02.046.

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This paper presents the results of theoretical studies on rocket/space hardware aerogas dynamics obtained from 2016 to 2020 at the Department of Aerogas Dynamics and Technical Systems Dynamics of the Institute of Technical Mechanics of the National Academy of Sciences of Ukraine and the State Space Agency of Ukraine along the following lines: rocket aerodynamics, mathematical simulation of the aerogas thermodynamics of a supersonic ramjet vehicle, jet flows, and the hydraulic gas dynamics of low-thrust control jet engines. As to rocket aerodynamics, computational methods and programs (CMPs) we

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Xu, Bing, Yikun Liu, Yumei Wang, Guang Yang, Qiannan Yu, and Fengjiao Wang. "A New Method and Application of Full 3D Numerical Simulation for Hydraulic Fracturing Horizontal Fracture." Energies 12, no. 1 (2018): 48. http://dx.doi.org/10.3390/en12010048.

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The numerical simulation of hydraulic fracturing fracture propagation is the core content of hydraulic fracturing design and construction. Its simulation results directly affect the effect of fracturing, and can effectively guide the fracturing construction plan and reduce the construction risk. At present, two-dimensional or quasi-three-dimensional models are mainly used, but most of them are used to simulate the vertical fracture of hydraulic fracturing. There are errors in the application process. In this paper, a three-dimensional mathematical model, including an elastic rock mechanics equ

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Iskandarov, Elman Kh. "IMPROVING THE EFFICIENCY OF THE FUNCTIONING OF GAS PIPELINES, TAKING INTO ACCOUNT THE STRUCTURAL FEATURES OF GAS FLOWS." Series of Geology and Technical Sciences 447, no. 3 (2021): 34–39. http://dx.doi.org/10.32014/2021.2518-170x.59.

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The multi-phase and different composition of gas flows during the development of offshore oil and gas-condensate fields leads to high costs of energy in the system of in-field storage and transportation of well products. The analysis of the existing storage and transportation systems of gas-condensate mixtures shows that the geophysical nature and complexity of the internal structure of the transported fluids must be taken into account when choosing the mode parameters and calculation schemes of the pipelines. High-speed gas lines can be operated in a so-called "dry" mode, in which the liquid

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