Journal articles: 'Electrohydraulic drive'

1

Medvedev, Yu A., and V. P. Kuznetsov. "Multimotor electrohydraulic drive systems." Russian Engineering Research 31, no. 5 (May 2011): 428–34. http://dx.doi.org/10.3103/s1068798x11050157.

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Xu, Ming, and Bo Jin. "Sine Simulation of Energy Regulation Based Electrohydraulic Variable-Speed Drive." Applied Mechanics and Materials 278-280 (January 2013): 365–69. http://dx.doi.org/10.4028/www.scientific.net/amm.278-280.365.

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The variable-speed electrohydraulic drive, which can achieve similar energy efficiency as volume drive system, has some good features. But the slow response and poor low-speed performance limit the development of the variable-speed electrohydraulic drive. The energy regulation based variable-speed electrohydraulic drive is a good solution to solve these problems by adding an energy regulation device and a throttling valve into the system. The sine simulations of energy regulation based electrohydraulic variable-speed drive are carried out. The simulation results have showed that the energy regulation system can not only achieve the goal of a good response, but also keep a good energy-saving performance.

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3

Milecki, Andrzej, and Jarosław Ortmann. "Influences of Control Parameters on Reduction of Energy Losses in Electrohydraulic Valve with Stepping Motors." Energies 14, no. 19 (September 26, 2021): 6114. http://dx.doi.org/10.3390/en14196114.

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In many heavy machines, the use of high force drives is required. For such tasks, electrohydraulic servo drives with proportional valves are used most often. In these valves, the proportional electromagnets are applied. If high precise control is additionally required, it is necessary to use expensive servo valves or precise stepping motors. In this paper, the application of a valve with one (or with two) stepping motors in the electrohydraulic servo drive is described. Such motors may work in a micro-step mode, which enables the precise positioning of the valve spool with low energy consumption. The control system structure that was used for positioning, consisting of such an electrohydraulic servo drive with a valve having stepping motors, is described. In the investigations, the following control parameters are considered: the number of stepping motors used, proportional gain coefficients, supply pressure, and desired step distance. The simulation model of the servo drive is proposed, enabling the investigations of energy consumption during the positioning process. In the investigations, the drive step responses are recorded and compared, taking into account the rise time and energy consumption. The overshot-free algorithm is used in the following step and tested in positioning tasks. The collected results of energy consumption of the drive during the positioning process are compared with other solutions.

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., Srishti Sharma. "DESIGN PROCEDURE OF AN ELECTROHYDRAULIC DRIVE." International Journal of Research in Engineering and Technology 04, no. 06 (June 25, 2015): 242–47. http://dx.doi.org/10.15623/ijret.2015.0406040.

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5

Grechikhin, Valeriy V., Galina A. Galka, Anatoliy I. Ozerskiy, and Mikhail E. Shoshiashvili. "The method of dynamic operating modes investigation in electrohydraulic drive systems with improved accuracy of positioning executive elements." MATEC Web of Conferences 226 (2018): 04024. http://dx.doi.org/10.1051/matecconf/201822604024.

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The article describes the method of dynamic operating modes investigation in electrohydraulic drive systems with improved accuracy of positioning output element. The method is the evolution of the fundamental positions of the mechanics of continuous media with moving boundaries as applied to the research of non-stationary processes accompanying the operation of hydraulic drive systems with piston hydraulic machines. The method is based on generalized modeling (technical, physical, mathematical and computer), takes into account the peculiarities of mutual influence of electric and hydraulic machines during their joint work as part of the electrohydraulic drive, which raises the level and adequacy of actuators simulation, as well as the reliability of the assessment of their technical condition. The method extends the field of research, improves the accuracy of the calculation of the positioning of the executive elements, taking into account the different dynamic modes of the drives under study.

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6

Bachman, Paweł, and Andrzej Milecki. "Investigation of Electrohydraulic Drive Control System with the Haptic Joystick." Acta Mechanica et Automatica 12, no. 1 (March 1, 2018): 5–10. http://dx.doi.org/10.2478/ama-2018-0001.

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AbstractThe term haptic is used to indicate the presence of force feedback from the manipulated object to the operator. One of the most commonly used haptic devices are joysticks. Such joysticks can be successfully applied also in communication with drive system, giving the human operator a feel of the output force. In the paper one axis joystick with force feedback used to control the electrohydraulic drive is proposed. In this joystick, a controlled brake with magnetorheological fluid and a small DC motor are applied. A beam with a strain gauge is used in a joystick arm, enabling the measurement of the force. In the joystick axis also a potentiometer is assembled, which measured the current arm position. In order to develop the control algorithms an electrohydraulic drive simulation and virtual model is worked out and then a haptic joystick is connected to it. The simulation results that have been obtained, enabled to design and test impedance and admittance control strategies for the system composed of haptic joystick and a real electrohydraulic drive. Finally the whole system is built, implemented and investigated in a laboratory environment. Investigations are conducted in conditions similar to real ones, in a situation where hydraulic piston touches an obstacle and the operator cannot observe this piston very accurately. Fifteen operators have been tested this way. The outcomes indicate that haptic control can improve the human feeling of forces between electrohydraulic drive and an obstacle and, thanks to this, the manual control is more accurate and safer.

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7

Isaev, Y. M., R. A. Sunarchin, and A. V. Matrosov. "Mathematical modeling of electrohydraulic drive for hydraulic turbine." St. Petersburg State Polytechnical University Journal 214, no. 1 2015 (March 2015): 30–36. http://dx.doi.org/10.5862/jest.214.4.

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8

Sokolov, V., O. Krol, and O. Stepanova. "Nonlinear simulation of electrohydraulic drive for technological equipment." Journal of Physics: Conference Series 1278 (July 2019): 012003. http://dx.doi.org/10.1088/1742-6596/1278/1/012003.

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9

Hong-Zhou Tan and N. Sepehri. "Parametric fault diagnosis for electrohydraulic cylinder drive units." IEEE Transactions on Industrial Electronics 49, no. 1 (2002): 96–106. http://dx.doi.org/10.1109/41.982253.

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10

Davies, R. M., and J. Watton. "Intelligent control of an electrohydraulic motor drive system." Mechatronics 5, no. 5 (August 1995): 527–40. http://dx.doi.org/10.1016/0957-4158(95)00024-y.

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11

Li, Yong, Fan Ding, Jian Cui, and Qi-peng Li. "Low power linear actuator for direct drive electrohydraulic valves." Journal of Zhejiang University-SCIENCE A 9, no. 7 (July 2008): 940–43. http://dx.doi.org/10.1631/jzus.a0820028.

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12

Finney, J. M., A. de Pennington, M. S. Bloor, and G. S. Gill. "A Pole-Assignment Controller for an Electrohydraulic Cylinder Drive." Journal of Dynamic Systems, Measurement, and Control 107, no. 2 (June 1, 1985): 145–50. http://dx.doi.org/10.1115/1.3149686.

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This paper is concerned with the practical application of self-tuning control to an electrohydraulic cylinder drive. The experimental drive studied had a dominant natural frequency of 19 Hz and consequently to achieve the fast sampling rate a novel method of controller implementation is required. Estimates of the model parameters are obtained by a square root filter and controller synthesis is achieved by a pole-assignment algorithm. The results presented were generated by an experimental rig under the control of a DEC LSI 11/23 microprocessor.

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13

Kurochkin, Anton, Vladimir Vagin, Anton Karpesh, and Natalja Dyorina. "Control system for electrohydraulic drive of a mobile sinking hoisting plant." MATEC Web of Conferences 224 (2018): 02009. http://dx.doi.org/10.1051/matecconf/201822402009.

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The article presents the results of the control system development for the electro hydraulic drive of a mobile sinking hoisting plant. Increasing the technical performance of mobile sinking hoisting plants is possible by increasing their productivity, reducing their massiveness and increasing the durability of tractional organs and a number of units and parts of lifting machines. However, the increase in productivity, in its turn, causes the need to increase the suspended load on the traction organs, which causes a significant increase of the dynamic loads in the elastic elements in the transient operation modes of the hoisting plant. One of the ways to reduce constantly acting dynamic loads of vibration character is the use of a gearless hydraulic drive with damping properties. But, nevertheless, the hydraulic drive possibilities are limited for large vibration amplitudes of dynamic forces. The damping properties of the hydraulic drive can be increased by using control system, which allows realizing effective control of the electro hydraulic drive of the hoisting plant.

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14

Gosiewski, Zdzisław, and Maciej Henzel. "A Robust Controller for Electrohydraulic Drives." Solid State Phenomena 113 (June 2006): 61–66. http://dx.doi.org/10.4028/www.scientific.net/ssp.113.61.

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Highly maneuverable aircraft has redundant electrohydraulic actuators that generate the forces to drive the aircraft control surfaces. Two problems are important in these actuators. First, during reconfiguration of the actuator channels the hydraulic system works in the full range of its parameters. It leads to strongly nonlinear models of the redundant servo. Second, the frequency bandwidth of elements, which are located in the feedback loop of the servo, should be as wide as possible. Therefore, it is necessary to choose proper control method for actuator, where the controller of control system adjusts the set point signal. The advanced control methods can ensure the new quality of the systems. The new, advanced methods can cope with such problem in practical applications. There are available: adaptive methods, predictive methods, etc. and first of all, the robust control methods. These methods are robust on external disturbance. The causes of disturbances are very different: the inaccuracy in the mathematical and simulation model, the change of the operation point, the weather and temperature conditions, etc. We have designed such models in the Matlab/Simulink environment and we divided the full actuator into small subsystems.

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15

Xu, Ming, and Bo Jin. "Speed-Control Strategy of Energy Regulation Based Variable-Speed Electrohydraulic Drive." Applied Mechanics and Materials 336-338 (July 2013): 912–15. http://dx.doi.org/10.4028/www.scientific.net/amm.336-338.912.

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Dedicated to the disadvantage of variable-speed drive, the energy regulation based variable-speed electrohydraulic drive is proposed. It is a novel solution by adding an energy regulation device and a flow valve into the system. It combines the advantages of variable-speed drive, valve control and energy regulation. But it is a multiple-input multiple-output control system, coupled with strong nonlinear, volatility and uncertainty of some parameters, which make the control strategy complicated. The multiple-compound PID control strategy, as well as the parameter tuning rule, is proposed.

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16

Matrosov, A. V., Y. M. Isaev, and R. A. Sunarchin. "MATHEMATICAL MODELING OF AN ELECTROHYDRAULIC DRIVE FOR A HYDRAULIC TURBINE." St. Petersburg State Polytechnical University Journal 249, no. 3 (October 2016): 22–28. http://dx.doi.org/10.5862/jest.249.3.

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17

WATTON, J., and D. J. CREBER. "Knowledge-based techniques for fault diagnosis of electrohydraulic drive systems." Proceedings of the JFPS International Symposium on Fluid Power 1993, no. 2 (1993): 297–302. http://dx.doi.org/10.5739/isfp.1993.297.

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18

Xu, Ming, Jing Ni, and Guo-jin Chen. "Co-simulation of Energy regulation based variable-speed electrohydraulic drive." Procedia Engineering 15 (2011): 1103–9. http://dx.doi.org/10.1016/j.proeng.2011.08.204.

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19

Medvedev, Yu A., and V. P. Kuznetsov. "Properties of a multimotor electrohydraulic drive with random parameter variation." Russian Engineering Research 30, no. 9 (September 2010): 851–55. http://dx.doi.org/10.3103/s1068798x10090017.

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20

Medvedev, Yu A., and V. P. Kuznetsov. "Energy supply to multimotor electrohydraulic drive with random parameter variation." Russian Engineering Research 31, no. 2 (February 2011): 116–18. http://dx.doi.org/10.3103/s1068798x11020183.

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21

Metrikin, V. S., and M. A. Peisel’. "Effect of correcting the electrohydraulic servo drive dynamic characteristics of the servo drive-mass system." Russian Aeronautics (Iz VUZ) 57, no. 4 (October 2014): 353–60. http://dx.doi.org/10.3103/s1068799814040060.

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22

Zhao, Qinghai, Hongxin Zhang, and Yafei Xin. "Research on Control Strategy of Hydraulic Regenerative Braking of Electrohydraulic Hybrid Electric Vehicles." Mathematical Problems in Engineering 2021 (February 2, 2021): 1–9. http://dx.doi.org/10.1155/2021/5391351.

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The vehicle will generate an amount of current while the electric vehicle just starting to regeneratively brake. In order to avoid the impact of high current on the traction battery, a novel electrohydraulic hybrid electric vehicle has been proposed. The main power source is supplied by the electric drive system, and the hydraulic system performs the auxiliary drive system that fully exerts the advantages of the electric drive system and the hydraulic drive system. A proper regenerative braking control strategy is presented, and the control parameters are determined by the fuzzy optimization algorithm. The simulation analysis built the model through the united simulation of AMESim and MATLAB/Simulink. The results illustrated that the optimized control strategy can reduce battery consumption by 1.22% under NEDC-operating conditions.

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23

Rybarczyk, Dominik. "Application of the MEMS Accelerometer as the Position Sensor in Linear Electrohydraulic Drive." Sensors 21, no. 4 (February 20, 2021): 1479. http://dx.doi.org/10.3390/s21041479.

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Various distance sensors are used as measuring elements for positioning linear electrohydraulic drives. The most common are magnetostrictive transducers or linear variable differential transformer (LVDT) sensors mounted inside the cylinder. The displacement of the actuator’s piston rod is proportional to the change in the value of the current or voltage at the output from the sensor. They are characterized by relatively low measurement noise. The disadvantage of presented sensors is the need to mount them inside the cylinders and the high price. The article presents preliminary research on the replacement of following sensors and the use of a microelectromechanical system (MEMS) accelerometer as a measuring element in the electrohydraulic drive control system. The control consisted of two phases: at first, the signal from the acceleration sensor was analyzed during the actuator movement, based on the value determined from the simplified model implemented on the controller. In the range of motion in which the dynamics were the lowest, the signal was integrated and the obtained value was used in the second phase of motion. In the correction phase, a new set point was determined. Conducting the research required building a dedicated research stand. The author conducted the simulation and experimental research.

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24

Milecki, A., and A. Myszkowski. "Modelling of electrohydraulic servo drive used in very low velocity applications." International Journal of Modelling, Identification and Control 7, no. 3 (2009): 246. http://dx.doi.org/10.1504/ijmic.2009.027211.

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25

Medvedev, Yu A., and V. P. Kuznetsov. "Dynamics of a multimotor electrohydraulic drive in an automatic control system." Russian Engineering Research 31, no. 6 (June 2011): 527–38. http://dx.doi.org/10.3103/s1068798x11060165.

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26

Romanov, A., A. Ursegova, and A. Shchenyatsky. "APPLICATION OF MECHATRONIC MODULES IN HEXAPODS TO AUTOMATION OF JOINTS ASSEMBLING." National Association of Scientists 1, no. 66 (May 14, 2021): 48–53. http://dx.doi.org/10.31618/nas.2413-5291.2021.1.66.405.

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The paper deals with the advantages of using mechanisms with parallel kinematics for the assembly of interference fits. The analysis of applicability of various types of actuators in hexapods is carried out, their main advantages and disadvantages are revealed. The main features of the construction of mechatronic systems with electromechanical and electrohydraulic drives are considered, the analysis of energy transitions in each type of drive is carried out. Comparative assessments of the technical characteristics of the actuators are carried out: in terms of load capacity, accuracy and speed.

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27

Daley, S. "A Study of a Fast Self-Tuning Control Algorithm." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 200, no. 6 (November 1986): 425–30. http://dx.doi.org/10.1243/pime_proc_1986_200_151_02.

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The implementation of a fast self-tuning control algorithm on a microcomputer system is described. The controller, which uses the pole placement approach to self-tuning, is applied to an analogue simulation of an electrohydraulic cylinder drive. It is demonstrated that the controller performs extremely well in tracking both the demand signal and time-varying process parameters.

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28

XU, Ming. "Using Artificial Neural Networks for Energy Regulation Based Variable-speed Electrohydraulic Drive." Chinese Journal of Mechanical Engineering 23, no. 03 (2010): 327. http://dx.doi.org/10.3901/cjme.2010.03.327.

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29

Medvedev, Yu A., and V. P. Kuznetsov. "Sensitivity-function analysis of the dynamic properties of a multimotor electrohydraulic drive." Russian Engineering Research 30, no. 12 (December 2010): 1202–4. http://dx.doi.org/10.3103/s1068798x10120038.

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30

Ioffe, Anatoliy, and Igor Mazur. "Investigation of Operating Regimes of Shut-off Hydrovalve with Electrohydraulic-powered Drive." Periodica Polytechnica Mechanical Engineering 62, no. 4 (August 30, 2018): 292–97. http://dx.doi.org/10.3311/ppme.12194.

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The paper suggests the design of the locking truck hydraulic valve with electro-hydraulic drive and braking, which eliminates the disadvantages of the known designs hydraulic valves. A mathematical model for the study of operating modes of the proposed design of hydraulic valve. As a result of research modes of pressure hydraulic valve is installed, it has a high-speed operation. The proposed design of the shut-off tractor hydraulic valve allows you to quickly make adjustment of the time of its operation during operation using the throttle is part of the hydraulic valve.

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31

Sokolov, V., O. Krol, O. Romanchenko, Y. Kharlamov, and Y. Baturin. "Mathematical model for dynamic characteristics of automatic electrohydraulic drive for technological equipment." Journal of Physics: Conference Series 1553 (May 2020): 012013. http://dx.doi.org/10.1088/1742-6596/1553/1/012013.

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32

Ramachandran, S., and P. Dransfield. "Interaction Between the Actuators in Loaded Multi-Channel Electrohydraulic Drives." Journal of Dynamic Systems, Measurement, and Control 115, no. 2A (June 1, 1993): 291–302. http://dx.doi.org/10.1115/1.2899034.

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This paper describes some of the interaction effects arising between two electrohydraulic servoactuator systems operating to sustain predetermined and separate force programs on a cantilever beam load system. The work is intended to be relevant to the simultaneous multi-channel drive situations of structure fatigue testing rigs, flight simulators, industrial robots and some machine tools. Simulation and experimental responses of a single-actuator system for a few locations of the drive on the beam and of the two-actuator system for a number of location combinations are presented, compared, and discussed. Combinations of step inputs of desired force were used to excite the system. Simulation and experimental responses show reasonable agreement. Interaction and its effects are quantified in terms of dynamic characteristics of the force responses of the actuators measured from the simulation and experimental results. The model for simulation was obtained via power bond graph modeling technique. The results show that interaction modifies the responses of the actuators, and that the level of interaction, its magnitude and nature are functions of the relative positions of the actuators. Interactions and its effects are also examined using simulation for a three-actuator force control system. The results confirm the earlier observation. The relative gain array developed for steady-state analysis of interaction by Bristol and extended by Witcher and McAvoy for use in dynamic situations is developed as a measure of interaction and is designated as interaction index. Interaction index is calculated and presented for a few cases. The results show that interaction index can be used to examine the magnitude and nature of interaction for multi-actuator systems. The objective of this study was to further appreciation of the origins, nature, and effects of interaction on the response patterns of several powered actuator systems acting simultaneously on one load.

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33

Таванюк, Татьяна Яковлевна. "Determination of transfer functions of the automatic electrohydraulic drive for special process equipment." Technology audit and production reserves 6, no. 3(26) (November 26, 2015): 35. http://dx.doi.org/10.15587/2312-8372.2015.57174.

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34

Rybarczyk, Dominik, and Andrzej Milecki. "Electrohydraulic Drive with a Flow Valve Controlled by a Permanent Magnet Synchronous Motor." Transactions of FAMENA 44, no. 2 (June 18, 2020): 31–44. http://dx.doi.org/10.21278/tof.44204.

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35

Matrosov, A. V. "OPERATIONAL MODES OF AN ELECTROHYDRAULIC DRIVE OF A RING GATE FOR A HYDRAULIC TURBINE." St. Petersburg State Polytechnical University Journal 238, no. 1 (April 2016): 19–27. http://dx.doi.org/10.5862/jest.238.2.

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36

ZAGIRNYAK, Mykhaylo. "Limits of noncavitation operation of an electrohydraulic complex with a variable-frequency electric drive." PRZEGL�D ELEKTROTECHNICZNY 1, no. 1 (January 5, 2015): 214–18. http://dx.doi.org/10.15199/48.2015.01.49.

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37

Kulikov, Ilya, Kirill Karpukhin, and Rinat Kurmaev. "X-in-the-Loop Testing of a Thermal Management System Intended for an Electric Vehicle with In-Wheel Motors." Energies 13, no. 23 (December 6, 2020): 6452. http://dx.doi.org/10.3390/en13236452.

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The article describes an elaboration of the X-in-the-loop (XiL) testing environment for a thermal management system (TMS) intended for the traction electric drive of an electric vehicle, which has each of its wheels driven by an in-wheel motor. The TMS features the individual thermal regulation of each electric drive using a hydraulic layout with parallel pipelines and electrohydraulic pumps embedded into them. The XiL system is intended as a tool for studying and developing the TMS design and controls. It consists of the virtual part and the physical part. The former simulates the vehicle operating in a driving cycle with the heat power dissipated by the electric drive components, which entails the change in their temperature regimes. The physical part includes the TMS itself consisting of a radiator, pipelines, and pumps. The physical part also features devices intended for simulation of the electric drive components in terms of their thermal and hydraulic behaviors, as well as devices that simulate airflow induced by the vehicle motion. Bilateral, real-time interactions are established between the two said parts combining them into a cohesive system, which models the studied electric vehicle and its components. The article gives a description of a laboratory setup, which implements the XiL environment including the mathematical models, hardware devices, as well as the control loops that establish the interaction of those components. An example of using this system in a driving cycle test shows the interaction between its parts and operation of the TMS in conditions simulated in both virtual and physical domains. The results constitute calculated and measured quantities including vehicle speed, operating parameters of the electric drives, coolant and air flow rates, and temperatures of the system components.

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38

Rybarczyk, Dominik. "Concept and modelling of the electrohydraulic valve with DC and stepper motors." MATEC Web of Conferences 252 (2019): 06003. http://dx.doi.org/10.1051/matecconf/201925206003.

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The article describes concept and modelling of a new type of electrohydraulic valve controlled by the combination of a stepper motor and a DC motor. The aim of this invention is to use in the proportional valve two motors with the different properties. Both motors are responsible for the movement of a valve spool. The stepper motor and the DC motor are connected to a shaft by using a bellows coupling. Transfer from rotary to linear motion is performed by use of a bolt-nut system. According to the invention, presented here valve can be used in hydraulic drive systems with high positioning accuracy requirement. The author was granted a patent no. P.421994 on the invention described in this paper.

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39

Nishiumi, T., and J. Watton. "Model reference adaptive control of an electrohydraulic motor drive using an artificial neural network compensator." Proceedings of the Institution of Mechanical Engineers, Part I: Journal of Systems and Control Engineering 211, no. 2 (March 1, 1997): 111–22. http://dx.doi.org/10.1243/0959651971539939.

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An artificial neural network is used as the feedback compensation element of a servovalve/ motor speed control system. The network is established on a variable gain/acceleration feedback principle and trained using computer simulation techniques. The network is then emulated as a real-time controller to significantly improve the speed characteristic of the motor. It is then shown how a feedforward network utilizing the motor pressure differential and speed may be readily adapted, in response to changes in motor speed, supply pressure and load torque, to track the prescribed input/output dynamic model.

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40

Kulakov, B., D. Kulakov, and Long Qi. "Gradient identification method of the model parameters for electrohydraulic servo drive of FESTO learning system." IOP Conference Series: Materials Science and Engineering 963 (November 13, 2020): 012025. http://dx.doi.org/10.1088/1757-899x/963/1/012025.

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41

Le, T. T., J. Watton, and D. T. Pham. "Fault classification of fluid power systems using a dynamics feature extraction technique and neural networks." Proceedings of the Institution of Mechanical Engineers, Part I: Journal of Systems and Control Engineering 212, no. 2 (March 1, 1998): 87–97. http://dx.doi.org/10.1243/0959651981539325.

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Multilayer perceptron (MLP) type neural networks and dynamic feature extraction techniques, namely linear prediction coding (LPC) and LPC cepstrum, are used to classify leakage type and to predict leakage flowrate magnitude in an electrohydraulic cylinder drive. Both single-leakage and multiple-leakage type faults are considered. A novel feature is that only pressure transient responses are employed as information. In addition, the feature extraction technique used to detect faults can result in a large data dimensionality reduction. The performance of two MLP models, namely serial and parallel, are studied to reflect the importance of the way data are presented to the MLP.

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42

Wang, Tzu-Feng, and Chuen-Bor Lee. "Application of the self-organising fuzzy control to an electrohydraulic servocylinder drive with a vertical load." International Journal of Computer Applications in Technology 12, no. 6 (1999): 306. http://dx.doi.org/10.1504/ijcat.1999.000214.

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43

Ferezin, Evaldo, Rouverson Pereira da Silva, Adão Felipe dos Santos, and Cristiano Zerbato. "Development of an electrohydraulic drive system for the vibrating conveyor belt of the peanut digger-inverter." PLOS ONE 13, no. 10 (October 30, 2018): e0203300. http://dx.doi.org/10.1371/journal.pone.0203300.

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44

Kurian, Priya C., Anish Gopinath, K. S. Shinoy, P. Santhi, K. Sundaramoorthy, Baby Sebastian, B. Jaya, M. N. Namboodiripad, and T. Mookiah. "Design of Servo Scheme and Drive Electronics for the Integrated Electrohydraulic Actuation System of RLV-TD." Journal of The Institution of Engineers (India): Series C 98, no. 6 (November 3, 2017): 757–69. http://dx.doi.org/10.1007/s40032-017-0401-y.

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45

Le, T. T., J. Watton, and D. T. Pham. "An artificial neural network based approach to fault diagnosis and classification of fluid power systems." Proceedings of the Institution of Mechanical Engineers, Part I: Journal of Systems and Control Engineering 211, no. 4 (June 1, 1997): 307–17. http://dx.doi.org/10.1243/0959651971539830.

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In this paper, multilayer perceptron (MLP) type neural networks are used to detect leakages in an electrohydraulic cylinder drive. Both single-leakage and multiple-leakage type faults are investigated. The performance of MLPs is examined relating to the level of leakage flowrate and it was found that MLPs perform well for line leakages but for across-cylinder seal leakages they could only detect leakage over 1.01/min. The generalization tests on non-training leakage flowrate and working temperature are also included. A novel feature is the use of system state variables for network training, including additional terms to accelerate convergence. The approach has also made a significant contribution to multiple-fault detection, particularly for the complex three-fault case.

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Yang, Yuan-Jian, Weiwen Peng, Debiao Meng, Shun-Peng Zhu, and Hong-Zhong Huang. "Reliability analysis of direct drive electrohydraulic servo valves based on a wear degradation process and individual differences." Proceedings of the Institution of Mechanical Engineers, Part O: Journal of Risk and Reliability 228, no. 6 (July 2014): 621–30. http://dx.doi.org/10.1177/1748006x14541256.

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Helian, Bobo, Zheng Chen, and Bin Yao. "Precision Motion Control of a Servomotor-Pump Direct-Drive Electrohydraulic System With a Nonlinear Pump Flow Mapping." IEEE Transactions on Industrial Electronics 67, no. 10 (October 2020): 8638–48. http://dx.doi.org/10.1109/tie.2019.2947803.

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MILECKI, Andrzej, and Dominik RYBARCZYK. "Investigations of applications of smart materials and methods in fluid valves and drives." Journal of Machine Engineering 19, no. 4 (December 20, 2019): 122–34. http://dx.doi.org/10.5604/01.3001.0013.6235.

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In the paper the investigations performed at the Division of Mechtronic Devices at Poznan University of Technology in the area of application of both: smart materials in electro-hydraulic and electro-pneumatic valves, and new methods to control of hydraulic servo drives, are presented. In a first part the piezo bender actuator is shortly described and its application in servo valve is proposed. This actuator replaced the torque motor in the available on the market servo valve. The new valve simulation model is proposed. The simulation and investigations results of the servo valve with the piezo bending actuator are included. In the next part of the paper the application of piezo tube actuator in flapper-nozzle pneumatic valve is described. The test stand and investigations results are presented. Later, in the article, the Model Following Control (MFC) and Fractional order Control (FoC) methods are described. Their application in control of electrohydraulic servo drive is proposed. Some investigations results are included in the paper, showing the advantages of those control methods.

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Zhao, Shoujun, Keqin Chen, Xiaosha Zhang, Yingxin Zhao, Guanghui Jing, Chuanwei Yin, and Xiao Xue. "A Generalized Control Model and Its Digital Algorithm for Aerospace Electrohydraulic Actuators." Proceedings 64, no. 1 (November 20, 2020): 31. http://dx.doi.org/10.3390/iecat2020-08500.

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It is difficult to describe precisely, and thus control satisfactorily, the dynamics of an electrohydraulic actuator to drive a high thrust liquid launcher engine, whose structural resonant frequency is usually low due to its heavy inertia and its complicated mass distribution. A generalized model is therefore put forward for maximum simplification and sufficient approximation, where a second-order transfer function is used to model the heavy mass-spring nature of the large engine body outside of the rod position loop, another second-order transfer function with two zeros and two poles representing the hydro-mechanical composite resonance effect in the closed rod position loop. A combined control strategy is applied to meet the stringent specification of static and dynamic performances, including a notch filter, a piecewise or nonlinear proportional, integral and differential (PID) controller and a feed-forward compensation. The control algorithm is implemented in digital signal processors with the same software structure but different parameters for different aerospace actuators. Compared to other approaches, this one makes it easier to grasp the system resonance nature, and, most importantly, the traditional dynamic pressure feedback (DPF) is replaced with the convenient digital algorithm, bringing prominent benefits such as a simplified design, reduced hardware cost and inherent higher reliability. The approach has been validated by simulation, experiments and successful flights.

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Heinken, Helge, Stephan Ulrich, Rainer Bruns, and Steffen Schneider. "High-response electrorheological servo valve." Journal of Intelligent Material Systems and Structures 31, no. 2 (September 15, 2019): 297–307. http://dx.doi.org/10.1177/1045389x19873427.

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The demand of more powerful and high-dynamic hydraulic actuators gives the servo valve as a control member an increasingly important role. The valve should provide the hydraulic actuator with sufficient volume flow over wide frequency range to achieve large strains at high operating frequencies. Here, the electrorheological effect as an electrohydraulic valve drive offers great potential. It converts the electrical input signal directly into a controlling mechanical quantity within a few milliseconds and provides theoretically unlimited strain. Thus, the electrorheological effect has the ability to increase the performance of conventional hydraulic systems. This work presents a two-stage servo valve with an electrorheological pilot stage. Furthermore, it introduces a model to describe the static and dynamic properties of the system. The model is validated on the basis of measurement results.

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Journal articles on the topic 'Electrohydraulic drive'

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