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Journal articles on the topic 'Servo Electro-Hydraulic actuator'

Author: Grafiati

Published: 25 May 2024

Last updated: 31 July 2025

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1

Wang, Xin Ge, Lei Li, Xiu Ling Wei, Gui Qin Chen, and Bing Feng Liu. "Electro-Hydraulic Servo Actuator Fuzzy Self-Tuning PID Control Research." Applied Mechanics and Materials 607 (July 2014): 795–98. http://dx.doi.org/10.4028/www.scientific.net/amm.607.795.

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According to the different working state of electro-hydraulic servo actuator servo system, the design parameter self-tuning three-dimensional fuzzy controller, the automatic setting of 3 d quantization factor and scaling factor of the fuzzy controller, the fuzzy control system can enhance the ability to adapt and tracking performance, improve the quickness of electro-hydraulic servo actuator servo system, reduces the overshoot of the electro-hydraulic servo actuator servo system, and rapidity and control accuracy to meet the electro-hydraulic servo actuator servo system dynamic performance and

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2

Wang, Xin Ge, Lei Li, Hui Ling Han, Xiu Ling Wei, Mao Dian An, and Bing Feng Liu. "Electro-Hydraulic Servo Actuator Parameters Self-Tuning Three-Dimensional Fuzzy Control Research." Applied Mechanics and Materials 607 (July 2014): 811–14. http://dx.doi.org/10.4028/www.scientific.net/amm.607.811.

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According to the different working state of electro-hydraulic servo actuator servo system, the design parameter self-tuning three-dimensional fuzzy controller, the automatic setting of three-dimensional fuzzy controller quantization factor and scaling factor, enhance the adaptability of fuzzy control system and tracking performance, and improve the quickness of electro-hydraulic servo actuator servo system, reduce the overshoot, the rapidity and precision meet the electro-hydraulic servo actuator control servo system dynamic performance and static performance requirements. 1.Parameter self-tun

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3

WOS, Piotr, and Ryszard DINDORF. "BRAIN-COMPUTER INTERFACE FOR CONTROL OF ELECTRO–HYDRAULIC SERVO DRIVE." Journal of Machine Engineering 18, no. 4 (2018): 86–95. http://dx.doi.org/10.5604/01.3001.0012.7635.

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The aim of the study was to perform bioelectric signal analysis focusing on its applicability to control of the electro-hydraulic servo drive. The natural bioelectric signals generated by brain, facial muscles and eye muscles read by the NIA (Neural Impulse Actuator) are translated into control commands in the controller of electro-hydraulic servo drive. Bioelectric signals detected by means of special forehead band with three sensors are sent to the actuator box, where they are interpreted as control signals. The test stand was constructed to control of the electro-hydraulic servo drive by me

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4

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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5

Xu, Bing, Hong Li Wang, Fu Li Liu, and Yuan Zheng. "Design of Interface Connecting PC/104 Based Electro-Hydraulic Servo Actuator & CAN Bus." Applied Mechanics and Materials 427-429 (September 2013): 797–801. http://dx.doi.org/10.4028/www.scientific.net/amm.427-429.797.

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In order to connect electro-hydraulic servo actuator to CAN network, one interface is designed for connecting electro-hydraulic servo actuator to CAN network. In this article, the author expounds design thinking and realization method for interface hardware and software. The card is applied in practice, and the practice proves the feasibility of the design method.

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6

Eugene, Kononykhin. "DEVELOPMENT OF PROCEDURES FOR DETERMINING THE PARAMETERS OF AN AIRCRAFT SERVO ACTUATOR." Eastern-European Journal of Enterprise Technologies 1, no. 9 (97) (2019): 11–18. https://doi.org/10.15587/1729-4061.2019.154837.

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Main trends in the use of electro-hydraulic actuators and requirements to parameters were discussed. Necessity of using automatic methods for testing an electro-hydraulic actuator together with the standard hardware of the electronic control unit was substantiated. The procedures for testing the control loop of an electro-hydraulic actuator set forth in this study make it possible to eliminate effects of mutual influence of dynamic and static characteristics of the actuator and hardware of the electronic control unit. Procedures for automatic identification of the actuator model and procedures

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7

Su, Wen Hai, and Ji Hai Jiang. "Direct Drive Volume Control Electro-Hydraulic Servo Ship Rudder." Key Engineering Materials 439-440 (June 2010): 1388–92. http://dx.doi.org/10.4028/www.scientific.net/kem.439-440.1388.

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Direct drive volume control（DDVC）electro-hydraulic servo system has synthesized the advantages of high power of hydraulic system and flexible control of the motor. It also has other features such as energy saving, high efficiency, small bulk and high reliability. On the background for application to the ship steering system, DDVC electro-hydraulic servo system for the control actuator of ship is designed and the mathematic model is made and simulated with Matlab/Simulink. The steering gears closed-loop system’s simulation obtained the perfect dynamic performances; verify the correctness of the

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8

Ur Rehman, Waheed, Xingjian Wang, Zeeshan Hameed, and Muhammad Yasir Gul. "Motion Synchronization Control for a Large Civil Aircraft’s Hybrid Actuation System Using Fuzzy Logic-Based Control Techniques." Mathematics 11, no. 7 (2023): 1576. http://dx.doi.org/10.3390/math11071576.

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The motion synchronization of the hybrid actuation system (composed of a servo-hydraulic actuator and an electro-mechanical actuator) is very important for all applications, especially for civil aircraft. The current research presents a nested-loop control design technique to synchronize motion between two different actuators, such as a servo-hydraulic actuator (SHA) and an electro-mechanical actuator (EMA). The proposed strategy consists of a trajectory, an intelligent position controller (fuzzy logic-based controller), a feed-forward controller, and an intelligent force controller (fuzzy log

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9

Dinca, Liviu, Jenica-Ileana Corcau, Teodor Lucian Grigorie, Andra-Adelina Cucu, and Bogdan Vasilescu. "Studies on the Thermal Behavior of an Electro-Hydrostatic Servo Actuator." Actuators 14, no. 2 (2025): 48. https://doi.org/10.3390/act14020048.

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This paper presents a study on the thermal behavior of an electro-hydrostatic servo actuator designed to actuate the ailerons of an airliner. The considered servo actuator was designed using existing commercial off-the-shelf components (electric motor, pump, hydraulic cylinder, valves, hydro-accumulator), and the control part was tuned using numerical simulations performed in SIMCENTER/AMESIM. This study begins with the functional parameters of the components used in the design and uses numerical simulations to test the thermal behavior of the components. A continuous stress spectrum of the se

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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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11

Yamada, Hironao, Shigeki Kudomi, Yoshinori Niwa, and Takayoshi Muto. "Development of a Hydraulic Force-Display (Application to One-DOF Master-Slave Control)." Journal of Robotics and Mechatronics 15, no. 1 (2003): 39–46. http://dx.doi.org/10.20965/jrm.2003.p0039.

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In this study, we deal with a bilateral master-slave system for tele-robotics composed of electro-hydraulic servo-systems. In a teleoperated master-slave system, the master has to play two roles, firstly as a reference input device to the slave and secondly as a force display device. In order to produce a force display composed of hydraulic servo-systems, we must solve a problem called back-drivability, in which the actuator in a hydraulic servo-system cannot be operated freely by manual means. As a practical solution to this problem, we propose a driving method for the actuator that uses a fo

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12

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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13

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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14

Kovari, Attila. "Influence of Internal Leakage in Hydraulic Capsules on Dynamic Behavior of Hydraulic Gap Control System." Materials Science Forum 812 (February 2015): 119–24. http://dx.doi.org/10.4028/www.scientific.net/msf.812.119.

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In hot rolling mills the plastic deformation of the strip is realized at high force and plastic strain speed controlled by electro-hydraulic servo actuators. These hydraulic servo actuators - hydraulic capsules – are capable to adjust the rolling gap at great rolling force dynamically. The dynamic behaviour of the rolling mill’s AGC (automatic gap adjustment) system mainly depends on the correct operation of hydraulic actuators and servo valves. These equipments are great value, planned maintenance is essential for reliable correct operation. The maintenance includes the refurbish of damaged,

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15

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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16

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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17

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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18

Fadel, M. Z., M. G. Rabie, and A. M. Youssef. "Motion control of an aircraft electro-hydraulic servo actuator." IOP Conference Series: Materials Science and Engineering 610 (October 11, 2019): 012073. http://dx.doi.org/10.1088/1757-899x/610/1/012073.

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19

Nguyen, Manh Hung, Hoang Vu Dao, and Kyoung Kwan Ahn. "Active Disturbance Rejection Control for Position Tracking of Electro-Hydraulic Servo Systems under Modeling Uncertainty and External Load." Actuators 10, no. 2 (2021): 20. http://dx.doi.org/10.3390/act10020020.

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In this paper, an active disturbance rejection control is designed to improve the position tracking performance of an electro-hydraulic actuation system in the presence of parametric uncertainties, non-parametric uncertainties, and external disturbances as well. The disturbance observers (Dos) are proposed to estimate not only the matched lumped uncertainties but also mismatched disturbance. Without the velocity measurement, the unmeasurable angular velocity is robustly calculated based on the high-order Levant’s exact differentiator. These disturbances and angular velocity are integrated into

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20

Saeedzadeh, Ahsan, Ali Tivay, Mohammad Zareinejad, S. Mehdi Rezaei, Abdolreza Rahimi, and Keivan Baghestan. "Energy-efficient hydraulic actuator position tracking using hydraulic system operation modes." Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering 232, no. 1 (2016): 49–64. http://dx.doi.org/10.1177/0954408916683434.

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Efficient actuation is an important requirement in electromechanical designs. Although hydraulic actuators are used extensively when high-magnitude forces are present in heavy machinery, they are not very energy-efficient. This paper aims to increase the efficiency of electro-hydraulic servo systems after introducing a controllable supply pressure and six mode of operation for different condition. This process allows for the system to have very low energy consumption whenever its environmental force agrees with its position reference signal. For this purpose, first, the electrohydraulic servo

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21

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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22

Essa, Mohamed El-Sayed M., Magdy AS Aboelela, MA Moustafa Hassan, and SM Abdrabbo. "Design of model predictive force control for hydraulic servo system based on cuckoo search and genetic algorithms." Proceedings of the Institution of Mechanical Engineers, Part I: Journal of Systems and Control Engineering 234, no. 6 (2019): 701–14. http://dx.doi.org/10.1177/0959651819884746.

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This article discusses a system identification based on a black-box state-space model for an experimental electro-hydraulic servo system. Furthermore, it presents force-tracking control for the electro-hydraulic servo system based on model predictive control. The parameters of model predictive controls have been tuned by cuckoo search algorithm as well as genetic algorithm. The realization of model predictive controls depends on using a data acquisition card (NI-6014) and Simulink/MATLAB as the core of the electro-hydraulic servo system control system. In this research, the combination of mode

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23

Liu, Xue Jun, Cun Xiang Liu, and Er Li Zhang. "Design and Experiment of Shock Absorber Electro-Hydraulic Servo-Testing System." Applied Mechanics and Materials 190-191 (July 2012): 679–82. http://dx.doi.org/10.4028/www.scientific.net/amm.190-191.679.

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Error compensating PID regulation algorithm was applied to design the shock absorber electro-hydraulic servo-testing system, which conforms to national standard QC/T 545-1999,. According to adopt the MTS407 controller, implement indicator diagram testing, speed diagram testing, friction diagram testing, temperature wearing diagram testing, wearing life testing, single and double actuator testing and whole frequency testing are implemented. After the experiment conducted by using shock absorber CA1049, the result shows that the testing system can collect mass data, and is high precision.

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24

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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25

Chen, Gexin, Gengting Qiu, Guishan Yan, et al. "Optimal Design of Accumulator Parameters for an Electro-Hydrostatic Actuator at Low Speed." Processes 9, no. 11 (2021): 1903. http://dx.doi.org/10.3390/pr9111903.

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The electro-hydrostatic actuator (EHA) is a type of highly integrated, compact, closed pump control drive system composed of a servo motor, a metering pump, a hydraulic cylinder and other components. Compared with the traditional valve control system, the electro-hydrostatic actuator has the advantages of a high power-to-weight ratio, high integration, environmental friendliness, and superior efficiency and energy saving. However, due to the complex mechanical–hydraulic coupling mechanism of the system and the existence of non-linear multi-source disturbances, the dynamic and static performanc

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26

Li, Wending, Guanglin Shi, Chun Zhao, Hongyu Liu, and Junyong Fu. "RBF Neural Network Sliding Mode Control Method Based on Backstepping for an Electro-hydraulic Actuator." Strojniški vestnik – Journal of Mechanical Engineering 66, no. 12 (2020): 697–708. http://dx.doi.org/10.5545/sv-jme.2020.6866.

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Aiming at the interference problem and the difficulty of model parameter determination caused by the nonlinearity of the valve-controlled hydraulic cylinder position servo system, this study proposes a radial basis function (RBF) neural network sliding mode control strategy based on a backstepping strategy for the electro-hydraulic actuator. First, the non-linear system model of the third-order position electro-hydraulic control servo system is established on the basis of the principle analysis. Second, the model function RBF adaptive law and backstepping control law are designed according to

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27

Zhao, Dongchen, Lilin Xu, and Sijia Qiao. "Research on real-time simulation technology of electro-hydraulic servo actuator models." IET Conference Proceedings 2024, no. 13 (2025): 2066–70. https://doi.org/10.1049/icp.2024.3351.

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28

Huang, Jing, Zhenkun Song, Jiale Wu, Haoyu Guo, Cheng Qiu, and Qifan Tan. "Parameter Adaptive Sliding Mode Force Control for Aerospace Electro-Hydraulic Load Simulator." Aerospace 10, no. 2 (2023): 160. http://dx.doi.org/10.3390/aerospace10020160.

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The aerospace electro-hydraulic servo simulator is used to simulate the air load received during flight, and is used for the performance test and acceptance test of aerospace servo actuators on the ground. The force loading accuracy of the load simulator is an important assessment index. Because the loading system and the actuator system to be tested are coupled together, the free displacement of the system to be tested during loading will bring huge disturbance to the loading system, thus how to suppress external interference has always been a hot issue in the control field. This paper addres

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29

Wang, Kai, Gexin Chen, and Tiangui Zhang. "Pump-Controlled AGC Micro-Displacement Position Control of Lithium Battery Pole Strip Mill Based on Friction Model." Processes 11, no. 9 (2023): 2587. http://dx.doi.org/10.3390/pr11092587.

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Electrode roll-forming refers to rolling a battery electrode into a preset thickness through the electro-hydraulic servo pump-controlled hydraulic roll gap thickness automatic control system (known to as pump-controlled AGC). Compared with the motor servo system, the friction problem of the electro-hydraulic servo system is more serious and the friction problem of the actuator itself is very prominent. Moreover, low-speed performance is one of its core indicators, the friction phenomenon is the most abundant during the low-speed stage and the impact on the servo system is also the most obvious

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30

Fitz-Coy, Norman, Vivek Nagabhushan, and Michael T. Hale. "Benefits and Challenges of Over-Actuated Excitation Systems." Shock and Vibration 17, no. 3 (2010): 285–303. http://dx.doi.org/10.1155/2010/435740.

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This paper provides a comprehensive discussion on the benefits and technical challenges of controlling over-determined and over-actuated excitation systems ranging from 1-DOF to 6-DOF. The primary challenges of over-actuated systems result from the physical constraints imposed when the number of exciters exceeds the number of mechanical degree-of-freedom. This issue is less critical for electro-dynamic exciters which tend to be more compliant than servo-hydraulic exciters. To facilitate the technical challenges discussion, generalized methods for determining the drive output commands and the a

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31

Gao, Bingwei, and Yongtai Ye. "Research on Position / Velocity Synergistic Control of Electro Hydraulic Servo System." Recent Patents on Mechanical Engineering 13, no. 4 (2020): 366–77. http://dx.doi.org/10.2174/2212797613999200420082115.

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Background: In some applications, the requirements of electro-hydraulic servo system are not only precise positioning, but also the speediness capability at which the actuator is operated. Objective: In order to enable the system to achieve rapid start and stop during the work process, reduce the vibration and impact caused by the change of the velocity, at the same time improve the positioning accuracy, and further strengthen the stability and the work efficiency of the system, it is necessary to perform the synergistic control between the position and the velocity of the electrohydraulic ser

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Guo, Li Li, Li Ming Yu, Yang Lu, and Dian Liang Fan. "Multi-Mode Switching Control for HSA/EHA Hybrid Actuation System." Applied Mechanics and Materials 494-495 (February 2014): 1088–93. http://dx.doi.org/10.4028/www.scientific.net/amm.494-495.1088.

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According to the switch transients problem existing in the Hybrid Actuation System (HAS), a multi-mode switching control system was proposed. This control system, based on the system feedback correction theory, can cater to the demands of dynamic characteristics and switch transients. To start with, the mathematical model of HAS was established on the basic of HASs operating principle, and the HAS is composed of Hydraulic Servo Actuator (HSA) and Electro-Hydrostatic Actuator (EHA). Further, the different operating modes controller are hammered out by employed the PID feedback correction contro

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33

Wang, Tao, and Jinchun Song. "Clearance Nonlinear Control Method of Electro-Hydraulic Servo System Based on Hopfield Neural Network." Machines 12, no. 5 (2024): 329. http://dx.doi.org/10.3390/machines12050329.

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The electro-hydraulic servo system has advantages such as high pressure, large flow, and high power, etc., which can also realize stepless regulation, so it is widely used in many engineering machineries. A linear model is sometimes only a simple approximation of an idealized model, but in an actual system, there may be nonlinear and transient variation characteristics in the systems. Coupling is reflected in the fact that the components or functional structures implemented by each system used for the design of hydraulic systems are not completely or independently related to each other, but af

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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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Sun, Xiaozhe, Xingjian Wang, and Siru Lin. "Multi-Fault Diagnosis Approach Based on Updated Interacting Multiple Model for Aviation Hydraulic Actuator." Information 11, no. 9 (2020): 410. http://dx.doi.org/10.3390/info11090410.

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The aviation hydraulic actuator (HA) is a key component of the flight control system in an aircraft. It is necessary to consider the occurrence of multiple faults under harsh conditions during a flight. This study designs a multi-fault diagnosis method based on the updated interacting multiple model (UIMM). The correspondence between the failure modes and the key physical parameters of HA is found by analyzing the fault mode and mechanism. The key physical parameters of HA can be estimated by employing a series of extended Kalman filters (EKF) related to the different modes of HA. The models i

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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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Song, Changlin, and Yong Yang. "Nonlinear-Observer-Based Neural Fault-Tolerant Control for a Rehabilitation Exoskeleton Joint with Electro-Hydraulic Actuator and Error Constraint." Applied Sciences 13, no. 14 (2023): 8294. http://dx.doi.org/10.3390/app13148294.

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The rehabilitation exoskeleton is an effective piece of equipment for stroke patients and the aged. However, this complex human–robot system incurs many problems, such as modeling uncertainties, unknown human–robot interaction, external disturbance, and actuator fault. This paper addresses the adaptive fault-tolerant tracking control for a lower limb rehabilitation exoskeleton joint driven by an electro-hydraulic actuator (EHA). First, the model of the exoskeleton joint is built by considering the principle of the hydraulic cylinder and the servo valve. Then, a novel disturbance-observer-based

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LI, Ting, Yeming YAO, Linhai ZHANG, Yang LI, and Xinmin WANG. "Adaptive fault-tolerant control for electro-hydraulic servo actuator based on multiple unmodeled dynamics estimation and compensation." Xibei Gongye Daxue Xuebao/Journal of Northwestern Polytechnical University 41, no. 1 (2023): 18–27. http://dx.doi.org/10.1051/jnwpu/20234110018.

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The internal leakage fault-tolerant control problem of the electro-hydraulic servo actuator under the influence of multiple unmodeled dynamics is investigated in this paper, and an adaptive fault-tolerant control scheme based on unmodeled dynamics estimation and compensation is proposed. The model of the actuator is divided into two subsystems, which extended-state observers are respectively constructed to estimate the matched and mismatched unmodeled dynamics. Combined with the estimation results of the unmodeled dynamics, an adaptive fault-tolerant controller is designed by using the backste

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Zhao, Ting, Jizhen Liu, and Yuguang Niu. "Improved dynamic model of electro- hydraulic servo and actuator system for steam turbine in power systems." Journal of Computational Methods in Sciences and Engineering 15, no. 3 (2015): 437–46. http://dx.doi.org/10.3233/jcm-150556.

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Micheal, J., M. F. Rahmat, N. Abdul Wahab, and W. K. Lai. "FEED FORWARD LINEAR QUADRATIC CONTROLLER DESIGN FOR AN INDUSTRIAL ELECTRO HYDRAULIC ACTUATOR SYSTEM WITH SERVO VALVE." International Journal on Smart Sensing and Intelligent Systems 6, no. 1 (2013): 155–70. http://dx.doi.org/10.21307/ijssis-2017-533.

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Macaluso, Andrea, and Giovanni Jacazio. "Prognostic and Health Management System for Fly-by-wire Electro-hydraulic Servo Actuators for Detection and Tracking of Actuator Faults." Procedia CIRP 59 (2017): 116–21. http://dx.doi.org/10.1016/j.procir.2016.09.016.

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Kővári, Attila. "Dynamic Model of Rolling Mill’s Electro-Hydraulic Gap Adjustment System." Materials Science Forum 659 (September 2010): 411–16. http://dx.doi.org/10.4028/www.scientific.net/msf.659.411.

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Choosing of adequate shape technological parameters together with good chemical compound is very important to produce steel strip with required cross-section and material quality. The shaping rate, speed and time have an effect on strip mechanical and geometrical quality. The rate of shaping force needed for steel strip plastic deformation is determined by the strength of the steel forming. In rolling mills technology the plastic deformation of the strip is realized at high plastic strain speed so the dynamic change of shaping force might seriously affects the remaining stress of the rolled st

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Hu, Jing, Ming Liu, and Wei Li. "Position and Speed Double Closed Loop Control Performance of Electro-Hydraulic Actuator System Research Based on AMESim." Applied Mechanics and Materials 779 (July 2015): 220–25. http://dx.doi.org/10.4028/www.scientific.net/amm.779.220.

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In the paper, we research on a preparatory electro-hydraulic actuator product, using the simulation software AMESim to research work to analyze the system performance. We research position in closed loop servo actuator system, generally only considered the requirements of the position. While the speed trajectory and precision control did not do high demand. The position of the system by increasing the speed control strategy module, the system meets the requirements of the position. At the same time, we can achieve speeds start-up operation, stable operation and stopped operation of the three p

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Wang, Da Peng, and Shi Zhu Tian. "Pseudo-Dynamic Testing Method Based on External Displacement Control." Applied Mechanics and Materials 204-208 (October 2012): 2428–32. http://dx.doi.org/10.4028/www.scientific.net/amm.204-208.2428.

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In order to accelerate the velocity and improve the accuracy of the pseudo-dynamic testing，the external displacement control method is put forward based on the hardware control. The internal displacement sensor of the actuator is invalid on control and substituted by the LVDT displacement sensor connected with the specimen. The process of the feedback displacement and command error compensation is quickly implemented by the internal closed-loop control of the actuator. Compared with the iteratively approximate load control, this method not only makes the testing velocity fast, but also enables

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Ge, Yaowen, Xiaowei Yang, Wenxiang Deng, and Jianyong Yao. "RISE-Based Composite Adaptive Control of Electro-Hydrostatic Actuator with Asymptotic Stability." Machines 9, no. 9 (2021): 181. http://dx.doi.org/10.3390/machines9090181.

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The electro-hydrostatic actuator (EHA), the actuator of electric drive and hydraulic transmission, is competitive since it is small in size, light in weight and high in power density. However, the existence of the velocity loop error of servo motors, unmodeled dynamics and highly nonlinear uncertainties restrict the improvement of the tracking accuracy of the EHA system. In order to achieve high-precision motion control of EHAs, a RISE-based composite adaptive control scheme is proposed in this paper. In the proposed composite adaptive control design, a novel parameter adaptive law is synthesi

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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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An, Yiqiang, Jiazhe Mao, Chengwei Tong, Xiaoyun Zhou, Jian Ruan, and Sheng Li. "Study of the Dynamic Properties of the Miniature Electro-Hydrostatic Actuator." Machines 12, no. 2 (2024): 114. http://dx.doi.org/10.3390/machines12020114.

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The electro-hydrostatic actuator (EHA) is a new type of high-performance servo actuator that originated in the field of aerospace, and it is gradually becoming a common basic component for various types of large equipment. A miniature EHA, mainly composed of a micro two-dimensional (2D) piston pump and a brushless DC motor, is designed in this article by simplifying the system structure. This paper analyzes the structure and working principle of this EHA and establishes the mathematical models of the brushless DC motor, micro two-dimensional pump, and hydraulic cylinder. Field-oriented control

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Yang, Zhaoshu, Zhongbo He, Fengbiao Yang, Ce Rong, and Xinhan Cui. "Design and analysis of a voltage driving method for electro-hydraulic servo valve based on giant magnetostrictive actuator." International Journal of Applied Electromagnetics and Mechanics 57, no. 4 (2018): 439–56. http://dx.doi.org/10.3233/jae-170116.

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Wu, Lizhe, Dingxuan Zhao, Xiaolong Zhao, and Yalu Qin. "Nonlinear Adaptive Back-Stepping Optimization Control of the Hydraulic Active Suspension Actuator." Processes 11, no. 7 (2023): 2020. http://dx.doi.org/10.3390/pr11072020.

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The displacement tracking performance of the electro-hydraulic servo actuator is critical for hydraulic active suspension control. To tackle the problem of slow time-varying parameters in the existing actuator dynamics model, a nonlinear adaptive back-stepping control (ABC) approach is adopted. Simultaneously, the parameters of the nonlinear ABC are difficult to configure, resulting in a poor control effect. An enhanced particle swarm optimization (PSO) approach integrating crazy particles (CP) and time-varying acceleration coefficients (TVAC) is suggested to optimize the controller settings.

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Konieczny, Jarosław, Marek Sibielak, and Waldemar Rączka. "The Control System for a Vibration Exciter." Solid State Phenomena 198 (March 2013): 600–605. http://dx.doi.org/10.4028/www.scientific.net/ssp.198.600.

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The paper presents the control system for an electro-hydraulic vibration exciter. A vibration exciter is used to carry out kinematic and forced excitations. Such excitations are needed during the static and dynamic examinations of suspension assemblies and their elements, such as damping springs. The most important elements of the exciter are: a hydraulic servo valve, a hydraulic actuator, a control system and a hydraulic supply station. An inductor works in a negative feedback loop. A set point generator and controller are parts of a real-time control system. The authors used a cRIO-9022 indu

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