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Journal articles on the topic 'Electro-hydrostatic actuator'

Author: Grafiati

Published: 4 June 2021

Last updated: 6 February 2022

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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 (May 16, 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 rectification. Simulation and experiments were performed to confirm the feasibility of the new concept. The experimental results indicate that the dual magnetostrictive material rods–based electro-hydrostatic actuator exhibits a maximum flow rate that is approximately twice that of a single magnetostrictive material rod–based electro-hydrostatic actuator, and that the operating frequency increases from 110 to 150 Hz.

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2

Kotagond, Aravindkumar D., Somashekhar S. Hiremath, and M. A. Kamoji. "Comparison of Controllers and Actuators Effect on Electro Hydrostatic Actuator." Applied Mechanics and Materials 895 (November 2019): 284–89. http://dx.doi.org/10.4028/www.scientific.net/amm.895.284.

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Hydraulic actuators play a major role in aircraft flight actuation and control. Primary control systems in an aircraft typically control the components that guide an airplane during flight. Electro Hydrostatic Actuators (EHA) is emerging as a viable option for aerospace as well as industrial machine builders. It is an emerging technology which replaces centralized hydraulic system by a self-contained and localized direct drive actuator system. As most of the aircraft applications use symmetric actuator, Symmetric actuator EHA system configuration is considered in most of the literatures. However in case of many industrial applications, asymmetric actuators are being used. The dynamic response that means how fast an actuator reaches a target position is an important criteria for any application. An indigenous experimental setup of EHA system is developed with measuring instruments and sensors that forms a mechatronic system. The Variable Motor and Fixed Pump configuration of EHA is used for experimentation. In this work the load analysis is carried out on asymmetric and symmetric actuators. Similarly the load analysis is carried out on different controllers like Proportional Derivative (PD), Proportional Integral (PI) and Proportional Integral Derivative (PID) over the dynamic response as a output. It is found that symmetric actuator and PD controller gives better results.

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3

Guo, Yazi, Yuchuan Zhu, Yuyang Li, Shangshu Fei, Bin Zhu, Xinbin Zhang, and Xiaolu Wang. "Model and experimental research of a hybrid self-contained electro-hydrostatic actuator using piezoelectric stack." Journal of Intelligent Material Systems and Structures 29, no. 7 (October 9, 2017): 1348–59. http://dx.doi.org/10.1177/1045389x17733329.

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Smart material–based electro-hydrostatic actuators are a potential alternative to traditional hydraulic actuators. Piezoelectric materials are a type of smart materials that can deliver large blocked forces. In this article, a piezoelectric stack–based electro-hydrostatic actuator is first introduced by presenting the schematic diagrams of its structure and work principle. Next, according to the research of the piezoelectric stack–based electro-hydrostatic actuator working principle, a mathematical model that can describe the dynamic characteristics of piezoelectric stack–based electro-hydrostatic actuator was established. The output displacement model of the piezoelectric stack–based actuator was established based on the improved asymmetric Bouc–Wen model. The simulation model was built in MATLAB/Simulink. Finally, experiments under different working conditions were conducted, as well as the corresponding simulations. The experimental results demonstrate that the prototype no-load output flow reaches its maximum at 275 Hz and the output flow peak is close to 1.6 L/min. Moreover, the load capacity is more than 20 kg and the maximum load is more than 50 kg according to the trend forecast. The simulation results exhibit good agreement with the experimental results, which means that the piezoelectric stack–based electro-hydrostatic actuator model is feasible.

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4

Song, Yu, and S. R. Habibi. "Electro-Hydrostatic Actuator Modeling." Applied Mechanics and Materials 307 (February 2013): 131–35. http://dx.doi.org/10.4028/www.scientific.net/amm.307.131.

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This paper demonstrates the modeling of an Electro-Hydrostatic Actuator prototype. The mathematical derivation of the physical model is reported.Parametric model was obtained through system identification.

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5

Wang, Tianyi, Zongxia Jiao, and Liang Yan. "Efficiency analysis of moving-magnet linear oscillating motor with dual-resonance for linear electro-hydrostatic actuator." Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering 231, no. 13 (November 25, 2016): 2487–501. http://dx.doi.org/10.1177/0954410016677332.

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More-electric aircraft draws considerable attention due to its high efficiency, high reliability, and easy maintenance. Linear electro-hydrostatic actuator is a novel linear actuation system suitable for more-electric aircraft, and offers many advantages over traditional rotary electro-hydrostatic actuator. However, it requires high-frequency reciprocate actuation of linear oscillating motors with both high efficiency and high power factor. In this study, a novel moving-magnet tubular linear oscillating motor with dual-resonance is proposed for linear electro-hydrostatic actuator applications to achieve high efficiency and high power factor simultaneously. Firstly, system impedance model is set up analytically, which helps to analyze the influence of structure parameters on system performance. Based on this model, working efficiency and power factor are compared with the nonresonance design, and validated by experimental results. In order to take real scenario into considerations, the nonlinearity of motor and rectangular-type load is also analytically derived and analyzed with effective resonant frequency tracking method proposed. It shows that dual-resonance design does increase system efficiency and power factor, and can be applied in linear electro-hydrostatic actuator system for more-electric aircraft effectively.

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6

Li, Wending, and Guanglin Shi. "Novel dual-redundancy electro-hydrostatic actuator research and controller design." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 233, no. 16 (June 14, 2019): 5874–86. http://dx.doi.org/10.1177/0954406219855093.

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The paper proposes a novel dual-redundancy motor pump for the electro-hydrostatic actuator. Rather than the traditional single motor pump electro-hydrostatic actuator system, the system proposed in this paper can operate in three working modes and automatically adjust its operating condition in accordance with task requirements. The novel dual-redundancy electro-hydrostatic actuator system prototype was developed, and a high-performance control method was proposed and applied to the system, combining proportional–integral–derivative and sliding mode control to study the control strategy and implementation method of double closed loop. In addition, a physical model simulation was conducted on the basis of Amesim for this electro-hydrostatic actuator under several working conditions. Results showed that the dual-redundancy electro-hydrostatic actuator can decrease power loss and demonstrate excellent performance and reliability.

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7

Tanaka, Hirokazu, Hiroshi Kaminaga, and Yoshihiko Nakamura. "Pressure Feedback Control Based on Singular Perturbation Method of an Electro-Hydrostatic Actuator for an Exoskeletal Power-Assist System." Journal of Robotics and Mechatronics 24, no. 2 (April 20, 2012): 354–62. http://dx.doi.org/10.20965/jrm.2012.p0354.

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This paper describes control methods of an Electro-Hydrostatic Actuators (EHA) for an exoskeletal power-assist systems. By increasing backdrivability of the electro-hydrostatic actuators, the exoskeletal power-assist systems can achieve haptic interaction with a human. We propose a pressure feedback controller based on singular perturbation method, which is used in a power-assist controller of the exoskeletal power-assist system. The controller assists human movements by increasing the sensitivity of the electrohydrostatic actuator with estimated torque feedback. The controllers were implemented on an exoskeletal power-assist system for a knee joint with an electrohydrostatic actuator. Their efficacy was evaluated by experiments.

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8

Jiang, Ji Hai, Qiao Liu, Jun Long Liu, and Zhen Xiu Hou. "Performance Comparison of Displacement and Speed Control in Electro-Hydrostatic Actuator." Applied Mechanics and Materials 779 (July 2015): 205–11. http://dx.doi.org/10.4028/www.scientific.net/amm.779.205.

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In recent years, power by wire (PBW) technique is developed in the European and American aviation field, and one of its important bases is electro-hydrostatic servo technique. In this paper, speed controlled and displacement controlled electro-hydrostatic actuation systems are modeled and simulated, by comparing their Bode graphics and time-zone respond curves, which shows that displacement control has small load inertia and high gain, so its dynamic performance is better. Thus, conclusion can be drawn that speed-displacement composite control may indeed improve the dynamic performance of electro-hydrostatic actuator.

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9

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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10

Wang, Bin, Nanyue Xu, Pengyuan Wu, and Rongfei Yang. "Simulation on an electro-hydrostatic actuator controlled by a high-pressure piezoelectric pump with a displacement amplifier." Assembly Automation 41, no. 4 (May 28, 2021): 413–18. http://dx.doi.org/10.1108/aa-04-2020-0054.

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Purpose The purpose of this paper is to provide a new hydrostatic actuator controlled by a piezoelectric piston pump and to reveal its characteristics. Design/methodology/approach In this paper, a piezoelectric pump with passive poppet valves and hydraulic displacement amplifier is designed as a new control component in a hydrostatic actuator for high actuation capacity. A component-level mathematical model is established to describe the system characteristics. Simulation verification for cases under typical conditions is implemented to evaluate the delivery behavior of the pump and the carrying ability of the actuator. Findings By using the displacement amplifier and the passive distributing valves, simulation demonstrates that the pump can deliver flow rate up to 3 L/min, and the actuator controlled by this pump can push an object weighing approximately 50 kg. In addition, it is particularly important to decide a proper amplification ratio of the amplifier in the pump for better actuation performance. Originality/value The piezoelectric pump presented in this paper has its potential to light hydrostatic actuator. The model constructed in this paper is valid for characteristic analysis and performance evaluation of this pump and actuators.

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11

Park, Y. H., and S. H. Park. "Identification and Control of Position Control System for Electro-Hydraulic Actuator (EHA)." Journal of the Korea Society For Power System Engineering 15, no. 2 (April 30, 2011): 69–77. http://dx.doi.org/10.9726/kspse.2011.15.2.069.

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12

YAMAMOTO, Satoru. "Electro-hydrostatic actuator for power-by-wire." Journal of the Japan Society for Aeronautical and Space Sciences 38, no. 433 (1990): 77–82. http://dx.doi.org/10.2322/jjsass1969.38.77.

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13

Li, Yang, Zongxia Jiao, and Zimeng Wang. "Design, Analysis, and Verification of an Electro- Hydrostatic Actuator for Distributed Actuation System." Sensors 20, no. 3 (January 23, 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 motors. The advantage of this actuator is that no more valve control is needed to rectify the linear pump besides the high efficiency of the direct pump drive. In this paper, both schematic and detailed structure of the actuator is presented. The kinematic and dynamic characteristics are analyzed and modeled, based on which the control method is proposed. The experiments verify the validity of the actuator structure and control.

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14

Belloli, D., F. Previdi, S. M. Savaresi, A. Cologni, and M. Zappella. "Modeling and Identification of an Electro-Hydrostatic Actuator." IFAC Proceedings Volumes 43, no. 18 (2010): 620–25. http://dx.doi.org/10.3182/20100913-3-us-2015.00020.

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15

Yang, Yousheng, Wenqian Niu, and Jing Zhao. "Design and Numerical Study of Electro-Hydrostatic Actuator." Journal of Physics: Conference Series 1288 (August 2019): 012088. http://dx.doi.org/10.1088/1742-6596/1288/1/012088.

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16

GAO, Bo, Yong-ling FU, Zhong-cai PEI, and Ji-ming MA. "Research on Dual-Variable Integrated Electro-Hydrostatic Actuator." Chinese Journal of Aeronautics 19, no. 1 (February 2006): 77–82. http://dx.doi.org/10.1016/s1000-9361(11)60271-9.

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17

PACHTER, M., C. H. HOUPIS, and K. KANG. "MODELLING AND CONTROL OF AN ELECTRO-HYDROSTATIC ACTUATOR." International Journal of Robust and Nonlinear Control 7, no. 6 (June 1997): 591–608. http://dx.doi.org/10.1002/(sici)1099-1239(199706)7:6<591::aid-rnc293>3.0.co;2-m.

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18

Alle, Navatha, Somashekhar S. Hiremath, Singaperumal Makaram, Karunanidhi Subramaniam, and Apratim Talukdar. "Review on electro hydrostatic actuator for flight control." International Journal of Fluid Power 17, no. 2 (April 15, 2016): 125–45. http://dx.doi.org/10.1080/14399776.2016.1169743.

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19

Zhou, Guozhe, Xin Lv, Tieshan Feng, and Luoning Gan. "Position Based Impedance Control of Electro-Hydrostatic Actuator." Journal of Physics: Conference Series 1601 (August 2020): 062050. http://dx.doi.org/10.1088/1742-6596/1601/6/062050.

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20

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 (November 16, 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. After that, the phase compensation for the input voltage that influences the synchronous motion between the magnetostrictive material–based pump plunger and the valve spool is investigated. Finally, the simulation model is built in MATLAB/Simulink, and the results are subsequently verified with experimental data. The results indicate that the phase lag of magnetostrictive material–based pump plunger output displacement is mostly influenced by magnetization with a low driving frequency and by an eddy current with a high driving frequency. The compensation angle for the input voltage affects the output flow of the magnetostrictive material–based electro-hydrostatic actuator and the moving direction of the cylinder piston rod. For a magnetostrictive material–based electro-hydrostatic actuator rectified by the active rotary valve, at the driving frequency of 200 Hz, the peak output flow can reach 2.4 L/min, which is much higher than 1.1 L/min of a magnetostrictive material–based electro-hydrostatic actuator rectified by the passive reed valve.

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21

Zhufeng, Lei, Qin Lvjun, Wu Xiaodong, Jin Wen, and Wang Caixia. "Research on Fault Diagnosis Method of Electro-Hydrostatic Actuator." Shock and Vibration 2021 (January 25, 2021): 1–9. http://dx.doi.org/10.1155/2021/6688420.

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Electrohydrostatic actuator is a type of actuator that uses hydraulic energy as the energy transmission carrier, which has the advantages of small size and high power. Since it is commonly used in harsh conditions such as strong vibration, high pressure, and heavy loads, condition monitoring and fault diagnosis of its hydraulic system are particularly important. This paper proposed a novel fault feature extraction method and applied to fault diagnosis of electrohydrostatic actuator. Firstly, the pressure signal of the hydraulic system is decomposed at multiple scales to obtain the center frequency of its maximum energy intrinsic mode component, and the feature data set is constructed based on the statistical features of the time domain. Then, a fault identification model of hydraulic system based on support vector machine is established. Finally, the fault classification and identification results of the hydraulic system are outputted. After a variety of method comparisons, the method proposed in this paper has a fault time ratio accuracy of 96.7%, which provides a basis and a new way for the fault diagnosis of the hydraulic system.

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22

Kou, Fa Rong. "The Control Study of Vehicle Active Suspension with Electro-Hydrostatic Actuator." Applied Mechanics and Materials 97-98 (September 2011): 716–20. http://dx.doi.org/10.4028/www.scientific.net/amm.97-98.716.

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Actuator is the key to vehicle active suspension. Based on the analyses of traditional passive suspension and active suspension system, a novel vehicle active suspension with Electro-Hydrostatic Actuator (EHA) is put forward. The system consists of two parts: spring and actuator with variable control force. The actuator is made up of hydraulic cylinder, hydraulic pump, controller and BLDCM. According to bond graph principles, bond graph model of 2 DOF passive suspensions and bond graph model of EHA active suspension are built. Moreover, fuzzy logic controller is designed and fuzzy control active suspension is simulated using MATLAB tools. The prototype and test rig of EHA active suspension are developed and bench tests are carried out. The simulation and experimental results show that fuzzy control active suspension with EHA provides better ride comfort, handling and stability than passive suspension.

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23

Huh, J. Y., H. H. Kim, and I. Y. Lee. "Modeling and Controller Design of an Electro-Hydrostatic Actuator." Journal of Drive and Control 12, no. 2 (June 1, 2015): 1–6. http://dx.doi.org/10.7839/ksfc.2015.12.2.001.

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24

KANG, Rongjie, Jean Charles MARE, and Zongxia JIAO. "NONLINEAR MODELING AND CONTROL DESIGN OF ELECTRO-HYDROSTATIC ACTUATOR." Proceedings of the JFPS International Symposium on Fluid Power 2008, no. 7-3 (2008): 665–70. http://dx.doi.org/10.5739/isfp.2008.665.

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25

Zhang, Chi, Xu Han, Tatiana Minav, and Yongling Fu. "Multi-Objective Optimization Design of a 30 kW Electro-Hydrostatic Actuator." Proceedings 64, no. 1 (November 22, 2020): 5. http://dx.doi.org/10.3390/iecat2020-08525.

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Electro-hydrostatic actuators (EHAs) combine the advantages of electric and hydraulic actuation, and it results in a preferable solution for heavy load actuation. The required power level of the EHA is increasing because it is being introduced to large vehicles such as submarines and heavy launch vehicles. Thus, a 30 kW EHA is under development for launch vehicles, which simultaneously require high dynamic performance, light weight, high efficiency, etc. Therefore, a dedicated multi-objective optimization design method is proposed for the preliminary design of the 30 kW EHA. In this study, firstly, the design requirements were analyzed for the launch vehicle application, and the objectives and the constraints of the optimization design were defined for the 30 kW EHA. Secondly, dedicated models were developed for evaluating each objective or constraint, including weight, bandwidth, and efficiency. Thirdly, the multi-objective EHA optimization design was implemented based on the genetic algorithm. Lastly, the optimization design results were evaluated through simulation analysis, which demonstrated that the 30 kW EHA achieved more than 10 Hz bandwidth with under 72 kg weight while the efficiency was also optimized.

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26

Kou, Fa Rong. "Sky-Hook Control of Vehicle Active Suspension with Electro-Hydrostatic Actuator." Advanced Materials Research 846-847 (November 2013): 30–33. http://dx.doi.org/10.4028/www.scientific.net/amr.846-847.30.

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A kind of vehicle active suspension based on Electro-Hydrostatic Actuator (EHA) is put forward. The suspension system consists of two parts: spring and actuator with controlled force. The actuator includes hydraulic cylinder, hydraulic pump, controller, etc. In this paper, a quarter-car dynamic model is exactly established involving bond graph models of EHA parts. Under the input conditions of the given road profile and designed sky-hook controller, The prototype and test rig of EHA active suspension are developed and bench tests are carried out. The simulation and experimental results show that sky-hook active suspension with EHA provides better ride comfort, handling and stability than passive suspension.

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27

Jawaid, Syed Imran, and Liang Wang. "EHA System Integration Design Analysis and Position Tracking Performance by PID Controller." Applied Mechanics and Materials 419 (October 2013): 826–34. http://dx.doi.org/10.4028/www.scientific.net/amm.419.826.

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Electro-hydraulic actuation is now an emerging and well established technology and currently applicable in almost all fields but most important application of electro-hydrostatic actuator (EHA) is aerospace industry. This paper will discuss the selection and designing of major sub-assemblies and their integration to form an EHA unit. A complete, compact, and high performance EHA will be designed in different sections of paper and dynamic analysis of major assemblies is carried out to meet the designed requirements. In last section position tracking performance of the EHA is analysed by using a conventional PID Controller and simulation results are discussed.

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28

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 (May 20, 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 out on both the excavator and the single hydraulic components, was previously developed within the Simcenter AMESim© environment. This mathematical model was modified with electric components for simulating a zonal hydraulics excavator and compared with a conventional load sensing (LS) machine. The energy efficiencies of both the LS circuit and the new solution were evaluated for typical duty cycles, pointing out the obtainable energy efficiency improvements, which were mainly due to the absence of the directional valves and pressure compensators. The results also point out the effect of the pipe losses when the circuit layout requires the pipe for connecting the pump with the actuator; moreover, the effect of a diesel engine downsizing on the energy saving was evaluated.

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29

Huang, Ligang, Tian Yu, Zongxia Jiao, and Yanpeng Li. "Active Load-Sensitive Electro-Hydrostatic Actuator for More Electric Aircraft." Applied Sciences 10, no. 19 (October 6, 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 hydraulic reduction ratio. Then, its stiffness characteristics are analyzed, especially the influence of hydraulic reduction ratio on impedance at low frequencies combined with investigating the power matching of ALS-EHA. A comparative experiment between the developed ALS-EHA and the EHA with fixed pump displacement and variable motor speed (EHA-FPVM) was carried out. The results reveal that the proposed ALS-EHA can reduce the motor heating and its displacement tracking error is smaller near zero speed owing to its higher impedance from the lower hydraulic reduction ratio under heavy load conditions.

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30

Zhu, Yuchuan, Xulei Yang, and Norman M. Wereley. "Theoretical and experimental investigations of a magnetostrictive electro-hydrostatic actuator." Smart Materials and Structures 27, no. 10 (September 21, 2018): 105043. http://dx.doi.org/10.1088/1361-665x/aad071.

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31

Jung, Gyu-Hong. "Start and Stop Characteristics of Single-Rod Electro-Hydrostatic Actuator." Transactions of the Korean Society of Mechanical Engineers A 35, no. 11 (November 1, 2011): 1483–90. http://dx.doi.org/10.3795/ksme-a.2011.35.11.1483.

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32

TAMAMOTO, Takumi, Toru OSHIMA, Takanori HIGASHIHARA, Ken'ichi KOYANAGI, Hiroyuki MASUTA, Tatsuo MOTOYOSHI, and Kei SAWAI. "Mechanism and control of antagonistic muscle driven Electro-Hydrostatic Actuator." Proceedings of the Bioengineering Conference Annual Meeting of BED/JSME 2018.30 (2018): 1C08. http://dx.doi.org/10.1299/jsmebio.2018.30.1c08.

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33

Li, Z. M., J. M. Lee, S. H. Park, J. S. Kim, and Y. H. Park. "A Hydraulic Power Steering System Based on Electro Hydrostatic Actuator." Journal of the Korea Society For Power System Engineering 15, no. 6 (December 31, 2011): 86–94. http://dx.doi.org/10.9726/kspse.2011.15.6.086.

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34

Wu, Shuai, Bo Yu, Zongxia Jiao, Yaoxing Shang, and PCK Luk. "Preliminary design and multi-objective optimization of electro-hydrostatic actuator." Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering 231, no. 7 (June 17, 2016): 1258–68. http://dx.doi.org/10.1177/0954410016654181.

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35

Henderson, Jean Paul, Andrew Plummer, and Nigel Johnston. "An electro-hydrostatic actuator for hybrid active-passive vibration isolation." International Journal of Hydromechatronics 1, no. 1 (2018): 47. http://dx.doi.org/10.1504/ijhm.2018.090305.

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36

Johnston, Nigel, Jean Paul Henderson, and Andrew Plummer. "An electro-hydrostatic actuator for hybrid active-passive vibration isolation." International Journal of Hydromechatronics 1, no. 1 (2018): 47. http://dx.doi.org/10.1504/ijhm.2018.10011371.

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37

Tsuda, Kenta, Tomoki Sakuma, Kodai Umeda, Sho Sakaino, and Toshiaki Tsuji. "Resonance-suppression Control for Electro-hydrostatic Actuator as Two-inertia System." IEEJ Journal of Industry Applications 6, no. 5 (2017): 320–27. http://dx.doi.org/10.1541/ieejjia.6.320.

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38

Umeda, Kodai, Tomoki Sakuma, Kenta Tsuda, Sho Sakaino, and Toshiaki Tsuji. "Reaction Force Estimation of Electro-hydrostatic Actuator Using Reaction Force Observer." IEEJ Journal of Industry Applications 7, no. 3 (May 1, 2018): 250–58. http://dx.doi.org/10.1541/ieejjia.7.250.

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39

I, Kota, Tomoki SAKUMA, Kodai UMEDA, Kenta TSUDA, Sho SAKAINO, and Toshiaki TSUJI. "Modeling Torque Efficiency and Internal Leakage Flow of Electro Hydrostatic Actuator." Proceedings of JSME annual Conference on Robotics and Mechatronics (Robomec) 2017 (2017): 2P1—E04. http://dx.doi.org/10.1299/jsmermd.2017.2p1-e04.

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Zhou, Guozhe, Tieshan Feng, Xin Lv, and Lihui Liu. "Parameter Identification of Electro-Hydrostatic Actuator Based on Particle Swarm Optimization." Journal of Physics: Conference Series 1486 (April 2020): 032031. http://dx.doi.org/10.1088/1742-6596/1486/3/032031.

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Kou, Fa Rong, Jian Ma, and Ji Bai Wang. "The Simulation and Experimental Study on a Novel Vehicle Active Suspension with Electro-Hydrostatic Actuator." Advanced Materials Research 430-432 (January 2012): 1984–87. http://dx.doi.org/10.4028/www.scientific.net/amr.430-432.1984.

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Actuator is a very important part of vehicle active control suspension. Based on the analyses of traditional passive suspension and active suspension system, a novel vehicle active suspension with Electro-Hydrostatic Actuator (EHA) is put forward. The system consists of two parts: spring and actuator with variable control force. The actuator includes hydraulic cylinder, hydraulic pump, controller, etc. According to bond graph principle, bond graph model of EHA active suspension are built. In addition, sky-hook controller and fuzzy logic controller are designed and sky-hook control and fuzzy control active suspension are simulated using MATLAB tools. The prototype and test rig of EHA active suspension are developed and bench tests are carried out. The simulation and experimental results show that sky-hook control and fuzzy control active suspension with EHA provide better ride comfort and stability than passive suspension system.

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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 control, and the acceleration feedback controller is added to the switched system to decreasing the switch transients. Finally, simulation results demonstrate the system is precise in tracking displacement signal, and it is validity of mitigating the switch transients by used method of feedback correction.

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Komagata, Mitsuo, Tianyi Ko, Ko Yamamoto, and Yoshihiko Nakamura. "Experimental Study on Critical Design of Electro-Hydrostatic Actuators Small in Size and Light in Weight." Journal of Robotics and Mechatronics 32, no. 5 (October 20, 2020): 911–22. http://dx.doi.org/10.20965/jrm.2020.p0911.

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Actuation systems for robots and other machines used in critical applications is an area that requires further research. In such applications, a machine works in a human environment and physically interacts with humans. Reliability and backdrivability are still insufficient in current systems. An electro-hydrostatic actuator has the potential advantage of high reliability by nature and high backdrivability in mechanical simplexity when it is designed to be small and light. This study provides a theoretical investigation of the methods for evaluating internal leaks and other mechanical losses, such as Coulomb and viscous friction, and experimentally evaluates two types (trochoid and involute gear) of prototyped hydraulic pumps.

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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 (August 26, 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 synthesized to compensate for the parametric uncertainties and a robust integral of the sign of error (RISE) feedback is utilized to suppress the adverse effects caused by the lumped disturbances, including the velocity loop error of a servo motor and other unmodeled dynamics. The synthesized parameter adaptive law possesses the advantage of fast convergence, which is beneficial to achieve transient tracking performance improvement. In addition, the proposed controller is more suitable for practical applications since it is chattering free. The closed-loop system stability analysis shows that the proposed control scheme guarantees an excellent asymptotic tracking performance. Finally, comparative simulations are conducted to verify the high-performance nature of the proposed controller.

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Ren, Guangan, Gustavo Koury Costa, and Nariman Sepehri. "Position control of an electro-hydrostatic asymmetric actuator operating in all quadrants." Mechatronics 67 (May 2020): 102344. http://dx.doi.org/10.1016/j.mechatronics.2020.102344.

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Lu, Yingtao, Bo Li, Yongteng Liu, Cao Tan, and Qijing Qin. "Review on electro-hydrostatic actuator: system configurations, design methods and control technologies." International Journal of Mechatronics and Manufacturing Systems 13, no. 4 (2020): 323. http://dx.doi.org/10.1504/ijmms.2020.10034620.

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Li, Bo, Yongteng Liu, Cao Tan, Qijing Qin, and Yingtao Lu. "Review on electro-hydrostatic actuator: system configurations, design methods and control technologies." International Journal of Mechatronics and Manufacturing Systems 13, no. 4 (2020): 323. http://dx.doi.org/10.1504/ijmms.2020.112356.

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KAMINAGA, Hiroshi, Yuta ANDO, Hirokazu TANAKA, and Yoshihiko NAKAMURA. "2A1-E11 Electro-Hydrostatic Actuator with Differential Accumulator for Energy Storage(Mechanism and Control for Actuator(1))." Proceedings of JSME annual Conference on Robotics and Mechatronics (Robomec) 2012 (2012): _2A1—E11_1—_2A1—E11_4. http://dx.doi.org/10.1299/jsmermd.2012._2a1-e11_1.

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Shen, Dong Kai, and Zhao Bin Yan. "Knowledge Based Collaborative Modeling and Simulation Platform to Design Complex Product." Advanced Materials Research 346 (September 2011): 455–59. http://dx.doi.org/10.4028/www.scientific.net/amr.346.455.

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To complex system, its performance is related to many disciplines nowadays. This article proposed a new multidisciplinary collaborative modeling and simulation platform (MCMSP) in designing complex product. The platform is knowledge based so earlier design results and model can help new designers to shorten the development cycle. Then the author uses this platform to design Electro hydrostatic actuator (EHA) which is widely used in Power-By-Wire (PBW) system.

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Nam, D. N. C., J. I. Yoon, and K. K. Ahn. "Position control of Electro hydrostatic actuator (EHA) using a modified back stepping controller." Journal of The Korean Society for Fluid Power & Construction Equipments 9, no. 3 (September 1, 2012): 16–22. http://dx.doi.org/10.7839/ksfc.2012.9.3.016.

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