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Journal articles on the topic 'Electro valve actuator'

Author: Grafiati

Published: 3 June 2025

Last updated: 1 August 2025

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1

Wang, Zhenyu, Yuchuan Zhu, Renqiang Li, Cheng Liu, and Niyomwungeri Bruno. "Development of a dual magnetostrictive material rods–based electro-hydrostatic actuator." Journal of Intelligent Material Systems and Structures 30, no. 13 (2019): 1871–81. http://dx.doi.org/10.1177/1045389x19849247.

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Recently, the use of smart material–based electro-hydrostatic actuators is increasingly becoming more attractive to overcome the inherent disadvantages of conventional actuation systems and to offer new opportunities for performance improvement. A new type of a dual magnetostrictive material rods–based electro-hydrostatic actuator is presented in the current study. An active rotary rectification valve is utilized to convert small, high-frequency vibration displacements of the magnetostrictive material rods into continuous, smooth and bidirectional motion of a hydraulic cylinder by fluid rectif

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2

Fassbender, David, and Tatina Minav. "Finding the Perfect Match: Different Heavy-Duty Mobile Applications Call for Different Actuators." Proceedings 64, no. 1 (2020): 22. http://dx.doi.org/10.3390/iecat2020-08524.

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For the longest time, valve-controlled, centralized hydraulic systems have been the state-of-the-art technology to actuate heavy-duty mobile machine (HDMM) implements. Due to the typically low energy efficiency of those systems, a high number of promising, more-efficient actuator concepts has been proposed by academia as well as industry over the last decades as potential replacements for valve control—e.g., independent metering, displacement control, different types of electro-hydraulic actuators (EHAs), electro-mechanic actuators, or hydraulic transformers. This paper takes a closer look on

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3

Kravetskyi, Yurii, and Oleksii Chernov. "Improving the dynamic positioning accuracy of the electro-hydraulic drive." Mechanics and Advanced Technologies 8, no. 3(102) (2024): 271–79. http://dx.doi.org/10.20535/2521-1943.2024.8.3(102).310508.

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Research is focused on improving the dynamic accuracy of control surface positioning during the switching of hydraulic actuator modes and studying the processes and phenomena that cause control surface overshoot. Existing studies on the dynamic accuracy of hydraulic actuators have been analyzed. Transitional processes occurring in the " electromagnetic recirculation valve – electronic control unit" loop during changes in hydraulic actuator operating modes have been examined. The features of processes and physical phenomena leading to increased activation time of the hydraulic actuator have bee

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4

Yu, Li Ming, and Zi Qing Ye. "Research on Performances of Hybrid Actuation System with Dissimilar Redundancies." Advanced Materials Research 430-432 (January 2012): 1559–63. http://dx.doi.org/10.4028/www.scientific.net/amr.430-432.1559.

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Hybrid actuation system (HAS) with dissimilar redundancies conforms to the development trend of future actuation systems in more electric aircraft (MEA). Hybrid Actuation system is composed of a traditional servo valve controlled hydraulic actuator (SHA) and an electro-hydraulic actuator (EHA). It has two operating models, active/passive mode (A/P) and active/active mode (A/A). In A/A model both actuators are actively controlled. Corresponding to A/A model, SHA is actively controlled and EHA is passively controlled in A/P model. The hybrid actuation system is built in the AMESim simulation env

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Pan, P. F., J. Li, Z. B. Guo, and X. L. Chen. "Mathematical modeling and time-frequency characterization of aero-engine actuators." Journal of Physics: Conference Series 2746, no. 1 (2024): 012021. http://dx.doi.org/10.1088/1742-6596/2746/1/012021.

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Abstract The actuator is an essential part of the aero-engine control system, and its performance directly determines the efficiency of the whole system. The mathematical model of the aero-engine actuators, including electro-hydraulic servo valves, hydraulic cylinders, and actuators, is modeled and the time-frequency characteristics are analyzed using the Simulink module. Then, the system response is simulated and its time-frequency characteristics are analyzed. The simulation results show that the simulation error of the established actuator model is within the allowable range. The displaceme

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Yu, Li Ming, Shou Qiang Wei, Tian Tian Xing, and Hong Liang Liu. "Reliability Analysis of Hybrid Actuation Based on GSPN." Advanced Materials Research 430-432 (January 2012): 1914–17. http://dx.doi.org/10.4028/www.scientific.net/amr.430-432.1914.

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Generalized stochastic Petri nets is adopted to develop the reliability models of two operating modes of the hybrid actuation system, which is composed of a SHA (Servo valve controlled Hydraulic Actuator), an EHA (Electro-Hydrostatic Actuator) and an EBHA (Electrical Back-up Hydrostatic Actuator).The dependability of hybrid actuation is got through the Markov chain which the Petri nets sate is isomorphic to and the Monte-Carlo simulation. Simulations are conducted to analyze influences of the operating mode and the fault coverage on system reliability of hybrid actuation system.

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7

Yu, Yang, and Bo Qiang Shi. "Design and Simulation of Direct Drive Volume Control Actuator." Applied Mechanics and Materials 155-156 (February 2012): 162–66. http://dx.doi.org/10.4028/www.scientific.net/amm.155-156.162.

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The electro-hydraulic actuator which was designed based on the technology of the direct drive volume control, has the advantages of small volume, high reliability, energy saving and so on, and can effectively overcome the deficiency of traditional valve control electro-hydraulic actuator. This paper realizes co-simulation of direct drive volume control actuator (DDVCA) by using AMESim and Matlab/Simulink. The simulation results show that DDVCA has the characteristics of smooth operation, fast response speed, high control accuracy. Therefore, DDVCA can replace traditional servo valve electro-hy

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8

Wang, Long Hui, and Yong Wang. "Design of Direct Drive Electro-Hydraulic Actuator Based on Internet of Things Technology." Advanced Materials Research 945-949 (June 2014): 1601–5. http://dx.doi.org/10.4028/www.scientific.net/amr.945-949.1601.

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Direct drive electro-hydraulic actuator is a new type of hydraulic transmission with easy maintenance and high efficiency, which has been widely used in municipal engineering (such as water pipe network, gas pipe network), nuclear power plants, and other occasions. For these applications, we designed the electro-hydraulic valve actuator based on Internet of things technology (IOT for short). This paper introduces the mechanical structure and the working principle of the direct-drive electro-hydraulic valve actuator, analyzes IOT architecture. Detailed design was carried on according to the IOT

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9

Bai, Yanhong, and Long Quan. "IMPROVING ELECTRO-HYDRAULIC SYSTEM PERFORMANCE BY DOUBLE-VALVE ACTUATION." Transactions of the Canadian Society for Mechanical Engineering 40, no. 3 (2016): 289–301. http://dx.doi.org/10.1139/tcsme-2016-0022.

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Restricted by narrow bandwidth of the existing high-flow servo valves, dynamic performance of high-flow electro-hydraulic servo systems can only be enhanced to a certain extent by advanced control algorithms. This paper proposes a new hydraulic control circuit, in which two valves are arranged in parallel to control the actuator jointly. Frequency response of the equivalent valve is raised and thereby the performance of high-flow electro-hydraulic servo systems can be improved. A model of the proposed system is built and the principle of improving system dynamic performance using the new circu

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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 (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 piez

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11

Sahu, Govind N., Suyash Singh, Aditya Singh, and Mohit Law. "Static and Dynamic Characterization and Control of a High-Performance Electro-Hydraulic Actuator." Actuators 9, no. 2 (2020): 46. http://dx.doi.org/10.3390/act9020046.

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This paper characterizes the static, dynamic, and controlled behavior of a high-performance electro-hydraulic actuator to assess its suitability for use in evaluating machine tool behavior. The actuator consists of a double-acting piston and cylinder arrangement controlled by a servo valve and a separate rear chamber controlled by a separate valve, designed to work in conjunction to generate static forces of up to 7000 N that can be superposed with dynamic forces of up to ±1500 N. This superposition of periodic forces with a non-zero mean makes the actuator capable of applying realistic loadin

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12

Li, Yang, Zongxia Jiao, and Zimeng Wang. "Design, Analysis, and Verification of an Electro- Hydrostatic Actuator for Distributed Actuation System." Sensors 20, no. 3 (2020): 634. http://dx.doi.org/10.3390/s20030634.

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In order to provide a simplified and low-cost solution of the terminal for a distributed actuation system, this paper proposes an electro-hydrostatic actuator (EHA) based on the linear drive principle. The proposed actuator is directly driven by a linear pump with a collaborative rectification mechanism, whose performance relies on the collaboration of the internal two units. A pair of linear oscillating motors are employed to drive the two pump units respectively. The control of the actuator is based on the modulation of the oscillating amplitude, frequency, and phase difference of the two mo

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13

Yusof, Ahmad Anas, Mohd Noor Asril Saadun, Mohd Khairi Mohamed Nor, Mohd Qadafie Ibrahim, and Muhammad Zaidan Abdul Manaf. "Position Control Mathematical Modelling and Operational Evaluation of Tele-Operated Electro-Hydraulic Actuator (T-EHA)." Applied Mechanics and Materials 773-774 (July 2015): 163–67. http://dx.doi.org/10.4028/www.scientific.net/amm.773-774.163.

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This study deals with a master-slave system for a tele-operated electro-hydraulic actuator (T-EHA) that focuses on a hydraulic system to remotely control a mini excavator. Tele-operation using such system is useful for tele-operation support of heavy construction and road restoration, typically in post-disaster areas. This paper presents the current development of position control electro-hydraulic actuator for such remote tele-operation application. A 2.4 GHz radio-controlled transmitter and receiver unit, which is also known as the master, has been utilized as the remote controller for an el

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14

Casoli, Paolo, Fabio Scolari, Tatiana Minav, and Massimo Rundo. "Comparative Energy Analysis of a Load Sensing System and a Zonal Hydraulics for a 9-Tonne Excavator." Actuators 9, no. 2 (2020): 39. http://dx.doi.org/10.3390/act9020039.

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With the rising demand for energy efficiency, displacement-controlled or so-called pump-controlled systems have become an attractive research topic for applications in construction machinery and other off-road vehicles. Pump-controlled systems can be implemented with electro-hydrostatic actuators as electro-hydraulic zones, which are located next to the end actuator as a replacement for the traditional valve-controlled hydraulic actuation systems. In this paper a 9-tonne class excavator is utilized as a study case. A mathematical model of the conventional machine, validated with tests carried

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15

Zhu, Yuchuan, Zhenyu Wang, and Shangshu Fei. "Development of a magnetostrictive material–based electro-hydrostatic actuator with an active rotary rectifying valve." Proceedings of the Institution of Mechanical Engineers, Part I: Journal of Systems and Control Engineering 233, no. 8 (2018): 994–1008. http://dx.doi.org/10.1177/0959651818809185.

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A magnetostrictive material–based electro-hydrostatic actuator with an active rotary valve for fluid rectification is presented in this article, which consists of a magnetostrictive material–based pump, an active rotary valve and a hydraulic cylinder. First, the magnetostrictive material–based pump plunger motion model is established, and the factors that affect the phase lag between the magnetostrictive material–based pump plunger displacement and the input voltage are discussed. Second, the flow area model of the active rotary valve and the kinetic model of the cylinder are established. Afte

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16

Milecki, Andrzej, Arkadiusz Jakubowski, and Arkadiusz Kubacki. "Design and Control of a Linear Rotary Electro-Hydraulic Servo Drive Unit." Applied Sciences 13, no. 15 (2023): 8598. http://dx.doi.org/10.3390/app13158598.

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In this paper, a new solution for an electro-hydraulic servo drive is proposed, which consists of two electro-hydraulic servo drives: one with a hydraulic cylinder and one with a hydraulic rotary motor. In the proposed drive, the linear actuator is attached to a horizontal base and the hydraulic motor is mounted on the actuator piston rod. Thus, the output signal of the drive is the lifting and lowering of the element suspended on the rope. The paper describes the structure, kinematics, dynamics, and control of a novel electro-hydraulic servo drive. A servo valve and a proportional valve are u

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17

Jensen, Konrad Johan, Morten Kjeld Ebbesen, and Michael Rygaard Hansen. "Novel Concept for Electro-Hydrostatic Actuators for Motion Control of Hydraulic Manipulators." Energies 14, no. 20 (2021): 6566. http://dx.doi.org/10.3390/en14206566.

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Self-contained hydraulic cylinders have gained popularity in the recent years but have not been implemented for high power articulated hydraulic manipulators. This paper presents a novel concept for an electro-hydrostatic actuator applicable to large hydraulic manipulators. The actuator is designed and analyzed to comply with requirements such as load holding, overload handling, and differential flow compensation. The system is analyzed during four quadrant operation to investigate energy efficiency and regenerative capabilities. Numerical simulation is carried out using path control and 2DOF

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18

Klimenko, Valeriy, and Oleksandr Yarita. "REGARDING THE SPECIFICS OF THE OPERATIONAL PROCESS OF AN ADVANCED-DESIGN ACCELERATOR PEDAL VALVE WITHIN AN ELECTRO-PNEUMATIC CLUTCH ACTUATOR." Avtoshliakhovyk Ukrayiny, no. 2 (279)'2024 (June 30, 2024): 54–60. http://dx.doi.org/10.33868/0365-8392-2024-2-279-54-60.

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The process of managing the clutch of a vehicle is an integral component of a driver’s work and requires spe-cific skills and physical effort, especially for drivers of trucks and buses. One way to simplify the clutch control process for these types of vehicles involves using a developed design of an electro-pneumatic clutch actuator. The particularity of the proposed clutch actuator lies in the utilization of an accelerator pedal valve in its construction, enabling the provision of necessary operational parameters under various working conditions. The construction of the accelerator pedal val

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19

Wang, Yan, Jia-yong Zhou, Xiao-jing Meng, and Kai-wen Lei. "Design and Research of Missile launcher Drive System for Anti-aircraft Gun and Missile Weapon System." Journal of Physics: Conference Series 2478, no. 9 (2023): 092005. http://dx.doi.org/10.1088/1742-6596/2478/9/092005.

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Abstract Aiming at the problems of large size and weight of electric cylinder, low efficiency and large pressure fluctuation of centralized hydraulic drive system, a drive system of anti-aircraft gun and missile weapon system based on electro-hydrostatic actuator is designed. The working principle of the hydraulic system of electro-hydrostatic actuator is discussed, its components are selected and designed, the micro cartridge hydraulic control check valve is designed and the electro-hydrostatic actuator is analyzed and integrated structure is designed;The simulation model is established by AM

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Ham, Young-Bog, Pyoung-Won Park, and So-Nam Yun. "Pressure Control Valve using Proportional Electro-magnetic Solenoid Actuator." Transactions of the Korean Society of Mechanical Engineers A 30, no. 10 (2006): 1202–8. http://dx.doi.org/10.3795/ksme-a.2006.30.10.1202.

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21

Li, Huan, Ying Huang, Guoming Zhu, and Zheng Lou. "Adaptive LQT Valve Timing Control for an Electro-Hydraulic Variable Valve Actuator." IEEE Transactions on Control Systems Technology 27, no. 5 (2019): 2182–94. http://dx.doi.org/10.1109/tcst.2018.2861865.

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22

Wang, Lixin, Dingxuan Zhao, Fucai Liu, Qian Liu, and Zhuxin Zhang. "Active Disturbance Rejection Position Synchronous Control of Dual-Hydraulic Actuators with Unknown Dead-Zones." Sensors 20, no. 21 (2020): 6124. http://dx.doi.org/10.3390/s20216124.

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In this paper, an integrated control strategy of position synchronization control for dual-electro-hydraulic actuators with unknown dead-zones is proposed. The unified control scheme consists of two parts: One is adaptive dead-zone inverse controllers of each hydraulic actuator to offset the unknown dead-zones. The other is the linear active disturbance rejection controller (LADRC) for position synchronization error. First, the model of the electro-hydraulic proportional position control system (EPPS) was identified by the forgetting factor recursive least square (FFRLS) algorithm. Next, the m

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Jeung, Won Kyu, Yong Jun Kim, and Seog Moon Choi. "Large Displacement Out-Of-Plane Bimorph Actuator for Optical Application." Key Engineering Materials 326-328 (December 2006): 1383–86. http://dx.doi.org/10.4028/www.scientific.net/kem.326-328.1383.

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A new thermal bimorph actuator for large out-of-plane displacement is designed, fabricated and tested. The deflecting beam is composed of polyimide, heater, and polyvinyl difluorides with tetrafluoroethylene (PVDF-TrFE). The large difference of coefficient of thermal expansion (CTE) of two polymer layers (polyimide and PVDF-TrFE) can generate a large deflection with relatively small temperature rising. Compared to the most conventional micro actuators based on MEMS (micro-electro mechanical system) technology, a large displacement, over 1 mm at 20 mW, could be achieved. The proposed actuator c

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Wang, Xiao Lu, Yu Chuan Zhu, Qing Feng Cheng, Yue Song Li, and Hong Xiang Xu. "Simulation Research on the Four-Nozzle Flapper Valve Based on GMA." Advanced Materials Research 287-290 (July 2011): 239–44. http://dx.doi.org/10.4028/www.scientific.net/amr.287-290.239.

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Nozzle-flapper type electro-hydraulic servo valve operated by torque motor has been widely used in industrial applications. As their bandwidths are limited, they are not suitable for high-speed applications. This paper presents a novel nozzle flapper valve driven by the giant magnetostrictive actuator, which has been designed and integrated into the four-nozzle flapper valve to replace the torque motor. And the influence of involved structural parameters on the dynamics of the actuator and the nozzle flapper valve is analyzed by AMESim. The simulation results can provide an important reference

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Yaryta, O. A., M. G. Mychalevych, D. N. Leontiev, et al. "FEATURES OF CONTROLLING ELECTROPNEUMATIC VALVES OF ACTUATOR TO CONTROL ITS CLUTCH WITH ACCELERATION VALVE." Science & Technique 17, no. 1 (2018): 64–71. http://dx.doi.org/10.21122/2227-1031-2018-17-1-64-71.

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The article deals with one of the ways to control an actuator of the automated clutch control system. The aim is to design control of the electropneumatic actuator, to control its coupling with the acceleration valve on the basis of experimental research as well as to provide rational parameters of the automated clutch control system for the robotic transmission. The feature of the system is an acceleration valve in the design of the electropneumatic actuator to control the clutch. New links demand to adjust the way to control the actuator. The connection of Pulse-Width Modulation (PWM) with s

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Yang, Bo, Yijie Lu, Haoyi Jiang, et al. "Quantitative Comparative Study on the Performance of a Valve-Controlled Actuator and Electro-Hydrostatic Actuator." Actuators 13, no. 4 (2024): 118. http://dx.doi.org/10.3390/act13040118.

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The development of the electrification of aircraft has prompted aviation hydraulic systems to shift from traditional centralized valve actuators (CVAs) to electro-hydrostatic actuators (EHAs). In this paper, aiming at the demand for a quantitative comparison of performance between CVAs and EHAs, CVA and EHA prototypes with the same power level and test platform were developed. Then, based on the power flow and dynamic models of the CVA and EHA, simulation and experimental comparative tests were conducted using different load spectrum test conditions and step response test conditions. The compa

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27

Haskara, İ., V. V. Kokotovic, and L. A. Mianzo. "Control of an electro-mechanical valve actuator for a camless engine." International Journal of Robust and Nonlinear Control 14, no. 6 (2004): 561–79. http://dx.doi.org/10.1002/rnc.903.

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Siwulski, Tomasz. "Experimental Tests on the Influence of Accumulated Pressure Energy on the Response Time of a Hydraulic Cylinder under External Load Actuated in a Classic and Distributed System Structure." Energies 16, no. 23 (2023): 7696. http://dx.doi.org/10.3390/en16237696.

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The need to develop hydraulic systems having reduced energy-consumption and improved operating parameters has led to an increased interest inter alia in the character of the actuator movement depending on the structure of the hydrostatic power supply system. The state-of-the-art analysis of the response time of the actuated hydraulic cylinder are typically based on the response times of the valves and on the propagation velocity of the pressure wave and have insufficiently focused on the flow of the energy accumulated in the power supply line. This article presents the results of tests which i

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Manwatkar, Sushant, S. V. S. Narayana Murty, and P. Ramesh Narayanan. "Fatigue Failure of Hydroformed AISI 316L Stainless Steel Bellows." Materials Science Forum 830-831 (September 2015): 713–16. http://dx.doi.org/10.4028/www.scientific.net/msf.830-831.713.

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Austenitic stainless steel AISI 316L is used for components of cryogenic engine in satellite launch vehicles due to its better mechanical properties at low temperatures. In one such application, AISI 316L stainless steel bellows are used in electro-pneumatic command valve of a cryogenic engine. This valve employs a hydro-formed bellow of 0.14mm thickness as an actuator element. When one of the electro-pneumatic command valve was vibrated without pressure, crack was noticed at the inner diameter of the bellow. Detailed metallurgical analysis indicated that the cracking to be due to fatigue.

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Khanh, N. D., V. E. Kuznetsov, S. V. Konstantinov, and A. N. Lukichev. "Algorithm for Adaptive Synchronization of the Multi-Channel Steering System." LETI Transactions on Electrical Engineering & Computer Science 15, no. 7 (2022): 82–90. http://dx.doi.org/10.32603/2071-8985-2022-15-7-82-90.

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The article presents the construction of an adaptive control algorithm that synchronizes the position and equalizes the loading forces of a hybrid drive system. The system consists of one electro-hydraulic actuator (EHA) and one electro-mechanical actuator (EMA) and operates in active-active mode. Destination algorithm to meet the growing requirements for the reliability of civil aircraft steering gears. A mathematical model of the system is presented, which includes non-linear friction forces in the engine and actuator, as well as non-linear flowdifferential characteristics of the hydraulic d

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Lee, Dongyoung, Buchun Song, Sang Yong Park, and Yoon Su Baek. "Development and Control of an Electro-Hydraulic Actuator System for an Exoskeleton Robot." Applied Sciences 9, no. 20 (2019): 4295. http://dx.doi.org/10.3390/app9204295.

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Exoskeleton robots have been developed in various fields and are divided into electric and hydraulic exoskeletons according to the actuator type. In the case of hydraulic robots, because a unidirectional pump is applied, there are limitations to the wearer’s walking. In addition, robot systems are complicated, because a directional control valve is required to change the direction of the actuator. To solve these problems, we designed the electro-hydraulic actuator (EHA) system which has both the hydraulic and electric advantages. The EHA system consists of a hydraulic bidirectional pump, a mot

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Ćwikła, Grzegorz, and Mirosław Szewczyk. "Station for Tuning and Testing Digital Twin in Hydraulic Actuator Control Systems under Programmable Load—Methodology, Design, and Tests." Electronics 13, no. 17 (2024): 3528. http://dx.doi.org/10.3390/electronics13173528.

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This article presents the methodology and process of the modeling, designing, and testing of a research station enabling the identification, tuning, and verification of Digital Twin (DT) in control systems in power hydraulics. The concept of the station is presented, the main part of which is a subsystem forcing a dynamic, variable load using a hydraulic actuator controlled by a proportional valve, together with data acquisition and processing systems and software. The load application subsystem can subject the tested power hydraulic system, usually consisting of an actuator with its own contr

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Li, Yongzhe, Vinh Tung Le, Nam Seo Goo, Tae Heun Kim, and Chang Seop Lee. "High actuation force of piezoelectric hybrid actuator with multiple piezoelectric pump design." Journal of Intelligent Material Systems and Structures 28, no. 18 (2017): 2557–71. http://dx.doi.org/10.1177/1045389x17692048.

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The piezoelectric hybrid actuator is a new electro-hydrostatic actuator with broad prospects for development. Compared with the traditional hydraulic pump, the piezoelectric hybrid actuator is characterized by a simple structure, small size, lightweight, and low power. However, it has a well-known weakness: It produces only a small actuation force and then cannot be used in real applications. Because the maximum force produced by a one-piezoelectric pump design cannot be increased much due to limitations in the power supply and piezoelectric materials, researchers have moved to the use of mult

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Li, Jian, Yong Lu, Fengshuo He, Gongjie Zhou, and Lixian Miao. "Analysis and Compensation Control of Engine Valve Response Delay Based on the Electro-Hydraulic Variable Valve Actuator." Machines 10, no. 8 (2022): 701. http://dx.doi.org/10.3390/machines10080701.

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The time delay of variable valve actuators has a significant influence on engine valve lift tracking performance. For camless hydraulic valve actuators, engine valve response is affected by many factors, such as friction and control valve response. In this paper, engine valve response delay is investigated in depth. Experiment results show that engine valve motion delay can be divided into valve open delay and valve close delay. They are different even in the same engine cycle. Complicated delay characteristics make it difficult to build an accurate delay model. In this paper, a data-based del

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Xu, Ming, Xiao-meng Wu, Xin Yu, and Guo-jin Chen. "Dynamic performance of auxiliary hydraulic power unit based electro-hydraulic variable speed drive system." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 232, no. 16 (2017): 2926–36. http://dx.doi.org/10.1177/0954406217727770.

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Inability of dynamic performances, especially the acceleration response, strongly inhibits the application of electro-hydraulic variable speed drive, even though its intrinsic energy-saving potential. In contrast to variable speed drive, the valve-controlled actuator system shows the capacity of fast response and accurate control precision, but it consumes more energy. The controllable auxiliary power unit based electro-hydraulic variable speed drive system is probably a solution to enhance dynamic performance of variable speed drive on the basis of energy-saving. Except for the principal vari

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Najjari, Behrouz, Mohammad J. Fotuhi, and Mousa Vaezipour. "Theoretical and Empirical Improvement of a Fast-Switching Electro-Pneumatic Valve by Using Different Methods." Acta Mechanica et Automatica 16, no. 2 (2022): 91–97. http://dx.doi.org/10.2478/ama-2022-0011.

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Abstract In this paper, a non-linear model of a 2–2 way, on–off fast-switching valve is used. The model includes subsystems of electrical, magnetic, mechanical and fluid. Pulse width modulation (PWM) technique is adopted to energise the on–off solenoid valve and allow the air to flow towards the actuator. Since the non-linear behaviour of valve is of great importance, to reduce the delay in performance of switching valves, different approaches are proposed. Furthermore, hysteresis, proportional integrator (PI), optimal model predictive and fuzzy logic controller (FLC) are used and compared. Al

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Ferrari, Alessandro, Pietro Pizzo, and Massimo Rundo. "Modelling and experimental studies on a proportional valve using an innovative dynamic flow-rate measurement in fluid power systems." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 232, no. 13 (2017): 2404–18. http://dx.doi.org/10.1177/0954406217721259.

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A numerical model of a servoactuator and of a four-port proportional direction control valve has been developed. Mechanical and hydraulic elements have been simulated in the LMS Amesim® environment. The complete model has been validated on the basis of the experimental time histories of the actuator velocity and of the flow-rate controlled by the proportional valve. The validation data have been acquired on a fluid power system used to test electro-hydraulic servovalves according to ISO 10770-1 standard. The measurement of the instantaneous flow-rate through the valve has been performed with a

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Jiang, Jinlin, Yu Wang, Heng Cao, Jun Zhu, and Xinbin Zhang. "A novel pump-valve coordinated controlled hydraulic system for the lower extremity exoskeleton." Transactions of the Institute of Measurement and Control 42, no. 15 (2020): 2872–84. http://dx.doi.org/10.1177/0142331220930623.

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In order to reduce the weight and improve the energy efficiency of the lower extremity exoskeleton, a novel pump-valve coordinated controlled (PVCC) hydraulic system is presented. This hydraulic system only uses one electro-hydrostatic unit (EHU) and two valves to drive two hydraulic cylinders at the hip and knee of the lower extremity exoskeleton. The PVCC hydraulic system has the advantage of high energy conversion efficiency of the electro-hydrostatic actuator (EHA), which consists of one EHU and one hydraulic cylinder. To meet the requirements of the moment and speed of each joint of the e

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Song, Sang-Oak, Gibaek Lee, and En Sup Yoon. "Process Monitoring of an Electro-Pneumatic Valve Actuator Using Kernel Principal Component Analysis." IFAC Proceedings Volumes 37, no. 1 (2004): 691–96. http://dx.doi.org/10.1016/s1474-6670(17)38813-4.

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Böhm, S., G. J. Burger, M. T. Korthorst, and F. Roseboom. "A micromachined silicon valve driven by a miniature bi-stable electro-magnetic actuator." Sensors and Actuators A: Physical 80, no. 1 (2000): 77–83. http://dx.doi.org/10.1016/s0924-4247(99)00298-8.

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Li, Huan, Ying Huang, Guoming G. Zhu, and Zheng D. Lou. "Profile Tracking for an Electro-Hydraulic Variable Valve Actuator Using Receding Horizon LQT." IEEE/ASME Transactions on Mechatronics 24, no. 1 (2019): 338–49. http://dx.doi.org/10.1109/tmech.2019.2892038.

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Aliyu, B., and J. Musa. "Modelling, Simulation & Analysis of Electro Magnetic Valve Actuator (EMVA) for Automotive System." Advances in Research 7, no. 4 (2016): 1–14. http://dx.doi.org/10.9734/air/2016/27260.

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TOYODA, Nozomi, and Hirohisa TANAKA. "1308 Study on an Electro-Hydraulic Valve Actuator for a Cam-less Engine." Proceedings of the Machine Design and Tribology Division meeting in JSME 2008.8 (2008): 127–30. http://dx.doi.org/10.1299/jsmemdt.2008.8.127.

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Ibrahim, Ezz, Tarek Elnady, Mohamed Hassan, and Ibrahim Saleh. "Modelling, transient response and hydraulic behaviour of 2DOF stabilization platform." FME Transactions 48, no. 4 (2020): 833–40. http://dx.doi.org/10.5937/fme2004833e.

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The main part of the hydraulic circuit of the hydraulic stabilization platform (HSP) is the electro-hydraulic servo valve (EHSV), which is very expensive due to its manufacturing requirements, so the proper selection for the geometrical configuration of electro hydraulic servo valve (EHSV) and maintaining the system stability are the main goal for establishing HSP. Also improving the performance of (HSP) to achieve the position tracking in two degrees of freedom (2DOF) based on modifying the different parameters of the hydraulic circuit (actuator size - hydraulic servo actuator geometric confi

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Huang, Ligang, Tian Yu, Zongxia Jiao, and Yanpeng Li. "Active Load-Sensitive Electro-Hydrostatic Actuator for More Electric Aircraft." Applied Sciences 10, no. 19 (2020): 6978. http://dx.doi.org/10.3390/app10196978.

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In the flight control system, using an electro-hydrostatic actuator (EHA) instead of the currently used relatively mature electro-hydraulic valve-controlled actuator, there are three prevailing concerns, namely heating, size, and stiffness. This paper proposes a novel principle EHA, called active load-sensitive EHA (ALS-EHA), which can actively realize the adaptive adjustment of pump displacement with load pressure. Its principle analysis and mathematical modeling based on the direct load-sensitive EHA (DLS-EHA) configuration is done to obtain the relationship between motor current and hydraul

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TANAKA, Hirohisa, and Nozomi TOYODA. "DEVELOPMENT OF A SENSOR-LESS ELECTRO-HYDRAULIC VALVE ACTUATOR FOR A CAM-LESS ENGINE." Proceedings of the JFPS International Symposium on Fluid Power 2005, no. 6 (2005): 256–61. http://dx.doi.org/10.5739/isfp.2005.256.

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Cho, Jung San. "A Study of Hydraulic Actuator Based On Electro Servo Valve For A Walking Robot." Journal of Drive and Control 13, no. 2 (2016): 26–33. http://dx.doi.org/10.7839/ksfc.2016.13.2.026.

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BROOKS, D. A. "DESIGN AND DEVELOPMENT OF FLOW BASED ELECTRO-RHEOLOGICAL DEVICES." International Journal of Modern Physics B 06, no. 15n16 (1992): 2705–30. http://dx.doi.org/10.1142/s0217979292001389.

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The foundations for the design of electro-rheological (ER) actuating devices that use Poiseuille flow are laid. Systems of measurement to assess ER fluids are described including a high pressure flow apparatus. This was used to examine alternative valve geometries and fluids. A method is shown for the reduction of basic flow data to excess shear stress and shear rate. Standard actuator arrangements are reviewed before the design of a flying control surface servomechanism is discussed. The evaluation of this validates the methods and indicates that the forces developed are within striking dista

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Savastre, Alexandru, Catalin Nutu, and Iulia Tomozei. "Pneumatic Stopper Cylinder: A Brief Overview." International Journal of Research and Review 10, no. 7 (2023): 5–81. http://dx.doi.org/10.52403/ijrr.20230712.

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The present article aims to increase knowledge of stopper cylinders with return spring. A stopper cylinder with return spring works in an ambient temperature of between 253.15K and 353.15K. The stopper cylinder used in this article is only a pneumatic actuator. After introduction, the authors analyse two pneumatic circuits using stopper cylinders. The first pneumatic scheme contains the following devices: stopper cylinder (STC 1-1), throttle check valves, 5/3-way valve, air service unit and compressed air supplies. The second pneumatic circuit contains the following devices: stopper cylinders

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Xiang, Zhong, Hao Liu, Guo-Liang Tao, Jun Man та Wei Zhong. "Development of an ε-type actuator for enhancing high-speed electro-pneumatic ejector valve performance". Journal of Zhejiang University-SCIENCE A 9, № 11 (2008): 1552–59. http://dx.doi.org/10.1631/jzus.a0820350.

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