Generic placeholder image

Recent Patents on Engineering

Author(s): Jianying Li*, Lingbing Kong, Heng Liang and Weidong LI

DOI: 10.2174/1872212118666230711165517

DownloadDownload PDF Flyer Cite As
Review of Development and Characteristics Research on Electro-hydraulic Servo System

Article ID: e110723218653 Pages: 15

  • * (Excluding Mailing and Handling)

Abstract

Background: The nonlinear problem of the electro-hydraulic servo system directly affects the system accuracy, response speed and other indicators, and the resulting problems of control inaccuracy and response delay urgently need to be solved.

Method: This article provides an overview of the working principle of electro-hydraulic servo systems, reviews the development history of electro-hydraulic servo systems, and summarizes the current research difficulties and latest patents of electro-hydraulic servo systems from the characteristics of active and passive loading systems, electro-hydraulic servo system multi flexibility characteristics, gap nonlinearity,parameter time-varying characteristics,mathematical modeling,force tracking accuracy control strategy, etc.

Result: A large number of scholars have proposed the latest optimization strategies to address the nonlinear problems in various aspects of the electro-hydraulic servo system, effectively improving the control accuracy and static and dynamic characteristics of the electro-hydraulic servo system.

Conclusion: By summarizing the latest progress in the study of nonlinear problems in various links of electro-hydraulic servo systems, it has played a guiding role in their future improvement and optimization strategies.

[1]
I. Mitsuya, "Application of control method to non active control system using model reference adaptive control", Japanese., vol. 57, pp. 3863-3865, 1991.
[2]
Y. Huang, "Utility of model reference adaptive control in active control systems", J. Japan., vol. 64, pp. 245-247, 1992.
[3]
Y. Konno, and M. Snioya, "“Development and application of dynamic system simulator”, N-P", Steel Tech. Report, vol. 10, pp. 63-68, 1998.
[4]
M.J. Kaisier, and W.L. Weeks, "Electrohydraulic Simulator Investigations", Math. Comput. Simul., vol. 33, pp. 221-240, 1996.
[5]
J. Carter, and K. Willis, A History of Flight Motion Simulators used for Hardware in the Loop Testing of Missile Systems., International Society Optical Engineering, 1998.
[http://dx.doi.org/10.1117/12.316388]
[6]
Y.L. Sang, and H.S. Cho, "A fuzzy controller for an aeroload simulator using phase plane method", IEEE Trans. Control Syst. Technol., vol. 9, pp. 790-801, 2001.
[7]
Y. Eto, N. Endo, and K. Watanabe, "A real-time simulator for torque split control systems", JSAE Rev., vol. 16, no. 1, p. 98, 1995.
[http://dx.doi.org/10.1016/0389-4304(95)94725-3]
[8]
D.Q. Truong, and K.K. Ahn, Soo K J, et al. Application of fuzzy-PID controller in hydraulic load simulator. Proceedings of the 2007 IEEE International Conference on Mechatronics and Automation, 2007 Harbin, China, 2007.
[http://dx.doi.org/10.1109/ICMA.2007.4304098]
[9]
H. Ohuchi, J.K. Han, and K. Inatomi, Model reference adaptive control of a hydraulic load simulator. Proceedings of 1993 International Conference on Fluid Power Transmission and Control, 1993 Hangzhou, China, pp. 136-140. 1993
[10]
H.Y. Han, "Design and simulation of steering gear power loading table control system", M. S. thesis, Northwest Polytechnic University, Xian, China,, 2008.
[11]
Z.L. Wang, Modern Electrical and Hydraulic Servo Control., vol. Vol. 23. Beijing University of Aeronautics and Astronautics Press, 2005, pp. 20-30.
[12]
G.Q. Li, K.D. Zhao, and J. Cao, "Theoretical study on load simulator of steering gear for micro-torque missile", Chinese J. Iner. Tech., vol. 6, pp. 54-57, 2005.
[13]
G.Q. Li, "Research on Key Technologies of Electro-hydraulic Load Simulator", M. S. thesis, Harbin University of Technology, Harbin, China,, 2006.
[14]
M.Y. Wang, "Research and Implementation of Electric Load Simulation Technology", M. S. thesis, Harbin University of Technology, Harbin, China, 2004.
[15]
J.F. Tao, "Research on electro-hydraulic servo turntable and its key technology", M.S. thesis, Shanghai Jiaotong University, Shanghai, China, 2006.
[16]
J.F. Wang, Z.M. Ye, and H.R. Li, "Research on double valve parallel control in suppression of excess force of ship steering gear hy-draulic load simulator", Chin. J. Mech. Eng., vol. 41, pp. 229-233, 2005.
[http://dx.doi.org/10.3901/JME.2005.04.229]
[17]
Z.M. Ye, H.R. Li, and J.F. Wang, "Composite control of load simulator for ship steering system based on CMAC", J. Eng. Des., vol. 9, pp. 147-150, 2002.
[18]
J. Yan, "Research and Realization of electro-hydraulic servo system for ship steering gear", M. S. thesis, Huazhong University of Science and Technology, Wuhan, China,, 2006.
[19]
X.L. Huang, Y.Q. Su, and K.D. Zhao, "Analytical and experimental research on active electro-hydraulic servo loading system", Aerosp Met Technol, vol. 3, pp. 6-18, 1999.
[20]
B.W. Gao, J.P. Shao, and G.H. Han, "Position and force fuzzy switching control method for electro-hydraulic servo system", IJMCL, vol. 18, pp. 99-104, 2014.
[21]
Y.M. Wang, G. Zhou, and S.G. Wang, Design and optimization of electro-hydraulic servo system based on MATLAB. Mechanical Drive,, vol. 25. pp. 46-49+90. 2005
[22]
W. Huang, Research on auto-immunity control of hydraulic valve-controlled cylinder based on electro-hydraulic servo system. Hydraulic Pneumatic and Sealing, vol. 40. pp. 13-16+20. 2020
[23]
Y.C. Song, and J.B. Wu, Integrated design of new electro-hydraulic loading device. Mach. elect., vol. 36. pp. 42-47. 2018
[24]
L.P. Jiang, and H.Y. Wang, Electro-hydraulic servo control loading system for structural static test. Mach. Manuf. auto, vol. 42. pp. 170-172. 2013
[25]
K. Wang, X.H. Jin, P. Tao, and H. Huang, "Adaptive backstepping sliding mode control for electro-hydraulic loading system considering load quality", J. Wuhan Univ. Technol. Mater. Sci., vol. 45, pp. 374-380, 2022.
[26]
J.S. Zhao, X.Y. Sun, and J. Dong, "Sliding mode decoupling control of multi-dimensional force loading system for liquid-driven parallel mechanism", J. Cent. South Univ., vol. 51, pp. 3407-3417, 2020.
[27]
Y. Sang, Y.J. Wang, and L.L. Shao, "Research on inertia force compensation of electro-servo force loading system based on iterative learning control", Hydraul. Pneum. Sealing, vol. 38, pp. 35-39, 2018.
[28]
P. Yin, "Research on Multi-Degree-of-Freedom Force Loading System Based on Parallel Mechanism", M. S. thesis, Harbin University of Technology, Harbin, China, 2015.
[29]
P.F. Xiao, "Research on Passive Electro-hydraulic Loading Device with Variable Load Stiffness", M. S. thesis, Wuhan University of Science and Technology, Wuhan, China, 2015.
[30]
X.X. Cheng, X.H. Jin, and M.W. Zhang, "Research on excess force of passive electro-hydraulic loading system", Mech. Des. Syst. Manuf., vol. 13, pp. 71-75, 2018.
[31]
Y. Jiang, H.B. Wang, and Y. Qian, "Hybrid compensation strategy for excess force of electro-hydraulic load simulator", Hydraul. Pneum., vol. 3, pp. 43-48, 2017.
[32]
J.Y. Zhang, Y.N. Zhao, and M. Sun, "Excess force compensation and control strategy for electro-hydraulic servo load simulator", Journal of Beijing Jiaotong University, vol. 38, pp. 146-152, 2014.
[33]
V. Eyu, S. Chen, and Y. Li, "Redundant force suppression in passive electro-hydraulic servo loading system", Hydraul. Pneum., vol. 5, pp. 52-56, 2014.
[34]
J.P. Shao, J.Y. Li, and Z.W. Wang, "Structural compensation control for superfluous force suppression in electro-hydraulic load simulator", J. Elec. Machin. Cont., vol. 13, pp. 586-591, 2009.
[35]
H. Liu, "Research on Electro-hydraulic Servo passive force loading control system", M. S. thesis, Beijing University of Technology, Beijing, China, 2018.
[36]
B. Li, and G.C. Rui, "Research on adaptive disturbance rejection control of electro-hydraulic servo system", Hydraul. Pneum., vol. 12, pp. 57-62, 2019.
[37]
Z.L. Cong, and C.H. Yuan, "High-order integral sliding mode control for passive electro-hydraulic servo system", Mach. Tools. HYD, vol. 42, pp. 56-59, 2014.
[38]
A.H. Wang, H.L. Xie, and G.Q. Li, "Suppression of excess force in valve-controlled asymmetric cylinder passive loading system", Mach. Tools. HYD, vol. 44, pp. 154-167, 2016.
[39]
H.J. Xue, P. Deng, and G.L. Zhang, Control strategy for suppression of excess force in ship steering gear loading system Ship Engineering, vol. 36. pp. 77-80+85. 2014
[40]
J. Zhao, G. Shen, C. Yang, G. Liu, L. Yin, and J. Han, "Feel force control incorporating velocity feedforward and inverse model observer for control loading system of flight simulator", Proc. Inst. Mech. Eng., Part I, J. Syst. Control Eng., vol. 227, no. 2, pp. 161-175, 2013.
[http://dx.doi.org/10.1177/0959651812464465]
[41]
X. Li, Z-C. Zhu, G-C. Rui, D. Cheng, G. Shen, and Y. Tang, "Force loading tracking control of an electro-hydraulic actuator based on a nonlinear adaptive fuzzy backstepping control scheme", Symmetry, vol. 10, no. 5, pp. 155-155, 2018.
[http://dx.doi.org/10.3390/sym10050155]
[42]
G. Shen, Z. Zhu, J. Zhao, W. Zhu, Y. Tang, and X. Li, "Real-time tracking control of electro-hydraulic force servo systems using of-fline feedback control and adaptive control", ISA Trans., vol. 67, pp. 356-370, 2017.
[http://dx.doi.org/10.1016/j.isatra.2016.11.012] [PMID: 27923473]
[43]
Z. Sheng, and Y. Li, "Hybrid robust control law with disturbance observer for high-frequency response electro-hydraulic servo loading system", Appl. Sci., vol. 6, no. 4, p. 98, 2016.
[http://dx.doi.org/10.3390/app6040098]
[44]
C. Wang, Z. Jiao, S. Wu, and Y. Shang, "A practical nonlinear robust control approach of electro-hydraulic load simulator", Chin. J. Aeronauti., vol. 27, no. 3, pp. 735-744, 2014.
[http://dx.doi.org/10.1016/j.cja.2014.04.011]
[45]
C. Wang, Z. Jiao, S. Wu, and Y. Shang, "Nonlinear adaptive torque control of electro-hydraulic load system with external active motion disturbance", Mechatronics, vol. 24, no. 1, pp. 32-40, 2014.
[http://dx.doi.org/10.1016/j.mechatronics.2013.11.005]
[46]
S.K. Mishra, G. Wrat, P. Ranjan, and J. Das, "PID controller with feed forward estimation used for fault tolerant control of hydraulic system", J. Mech. Sci. Technol., vol. 32, no. 8, pp. 3849-3855, 2018.
[http://dx.doi.org/10.1007/s12206-018-0737-0]
[47]
J.H. Guo, "Research on position disturbance electro-hydraulic servo force loading control system", M. S. thesis, Civil Aviation University of China, Tianjin, 2008.
[48]
J. Zhang, "Research on Electro-hydraulic Servo System Based on Speed Estimation", M. S. thesis, Beijing Jiaotong University, Beijing, China, 2021.
[49]
H. Wei, "Redundant force suppression of position disturbance electro-hydraulic loading system", M. S. thesis, Wuhan University of Science and Technology, Wuhan, China, 2020.
[50]
L.H. Chen, "Dynamic parameter optimization and Simulation Research of double-nozzle baffle servo valve", M. S. thesis, Wuhan University of Science and Technology, Wuhan, China, 2015.
[51]
P. Zhang, "Flow field analysis and static and dynamic characteristics of double-nozzle baffle servo valve", M. S. thesis, Kunming University of Technology, Kunming, China, 2011.
[52]
W. Guo, "Numerical simulation analysis of internal flow field of double-nozzle baffle servo valve", M. S. thesis, Taiyuan University of Technology, Taiyuan, 2010.
[53]
W.W. Shi, "Research on characteristics of dual-nozzle baffle electro-hydraulic servo valve based on flow field analysis", M. S. thesis, Yanshan University, Yanshan, China,, 2016.
[54]
D.J. Mu, and C.C. Li, "Nonlinear modeling and linearization of double nozzle baffle servo valve", Chin. J. Mech. Eng., vol. 48, pp. 193-198, 2012.
[http://dx.doi.org/10.3901/JME.2012.02.193]
[55]
Y. Yang, "Visual simulation of flow field of electro-hydraulic servo valve with double nozzle baffle", M. S. thesis, Wuhan University of Science and Technology, Wuhan, China, 2010.
[56]
J.P. Hu, and K.J. Li, "Numerical simulation of working process of double-nozzle baffle servo valve", Shock Vib., vol. 34, pp. 109-114, 2015.
[57]
F.H. Du, and S.B. Ma, "Study on contamination resistance of double nozzle-baffle electro-hydraulic servo valve", Hydraul. Pneum., vol. 13, pp. 108-114, 2018.
[58]
L. Zhang, J.H. Peng, and S.J. Li, "Harmonic response analysis of torque motor vibration characteristics of nozzle baffle servo valve", Mech. Eng., vol. 29, pp. 1435-1438, 2012.
[59]
X. Xu, "Modeling and Simulation Research on electro-hydraulic servo valve with double nozzle baffle", Mech. Des. Manuf., vol. 13, pp. 59-61, 2008.
[60]
X.B. Lu, J.H. Peng, and S.J. Li, "Dynamic characteristics of the jet force on the flapper of the pilot stage in a flapper nozzle servo valve under the flow-solid interaction", J. Beijing Inst., vol. 29, pp. 445-455, 2020.
[61]
B. Zhang, T. Chen, Q. Wang, S.L. Zhou, and D.R. Gao, "Research on valve core’s clamping stagnation of double flapper-nozzle servo valve", High Technol. Lett., vol. 25, pp. 65-73, 2019.
[62]
M.L. Zhou, and W. Gao, "Static characteristics of the new type nozzle flapper amplifier for double nozzle flapper electro-hydraulic servo valve", J. Iron Steel Res, vol. 19, pp. 617-620, 2012.
[63]
Y.B. Hao, C.H. Fei, and Y.T. Hu, "Vibration characteristics analysis of jet pipe servo valve torque motor", Fluid Drive & Control, vol. 6, no. 1, 2014.
[64]
X.G. He, Z. Huang, and Y.L. Jin, "Research on jet tube electrohydraulic servo valve technology", Mach. Tools. Hydraulics, vol. 41, pp. 60-62, 2013.
[65]
W.G. Hu, L. Wu, K.S. Chen, and C.C. Zhan, "Effect of jet pipe servo valve receiving port shape on valve characteristics", Mech. Des. Manuf., vol. 17, pp. 218-221, 2018.
[66]
K.Y. Zhao, L.J. Zhang, and C.H. Yuan, "Characteristic analysis of jet tube electro-hydraulic servo valve", Mach. Tools. Hydraulics, vol. 44, pp. 56-59, 2016.
[67]
Y.L. Jin, D.D. Chen, Q. Fang, and X. Zhang, "Effect of spool valve deformation of jet pipe servo valve on servo valve performance", Mach. Tools. Hydraulics, vol. 49, pp. 164-168, 2021.
[68]
P.Y. Chen, "Study on safety of electro-hydraulic servo valve for jet pipe", Electromech. Equip., vol. 32, pp. 84-86, 2015.
[69]
Z.C. Deng, and W.P. Hu, "Finite element analysis of main components of jet pipe servo valve", Mach. Sci. Technol., vol. 31, pp. 1880-1884, 2012.
[70]
X.C. Liu, "Adaptive optimal control of jet tube electro-hydraulic servo valve", M.S. thesis, Dalian University of Technology, Dalian, China, 2020.
[71]
C. Chen, "Analysis on anti-pollution characteristics of jet tube electro-hydraulic servo valve", Intern. Combus. Engi. Acces., vol. 12, pp. 60-62, 2022.
[72]
L.K. Meng, Y.C. Zhu, and J.J. Ding, "“Effect of erosion on the performance characteristics of jet pipe servo valve front stage”, Hy-draul", Pneum., vol. 46, pp. 101-106, 2022.
[73]
B. Jiang, X.Z. Yin, and L. Wang, "Study on optimization of jet pipe servo valve nozzle", Hydraul. Pneum. Seali., vol. 42, p. 35, 2022.
[74]
D.D. Chen, Y.L. Jin, and Z. Zhou, "Research on axial grinding and zero position characteristic test system of spool valve of jet tube servo valve", Mach. Tools. Hydraulics, vol. 47, pp. 54-56, 2019.
[75]
J.J. Hu, Z.H. Yang, Y.l. Jin, and X.D. Kong, "Research on prestage modeling and parameter matching of jet pipe servo valve", J. Beijing Inst. Technol., vol. 39, pp. 1101-1106, 2019.
[76]
J. Chen, C.H. Yuan, Q. Guo, and Y.B. Chu, "Dynamic flow field analysis of jet pipe servo valve front stage", J. Instrum., vol. 38, pp. 1731-1737, 2017.
[77]
K.S. Chen, and C.C. Zhan, "Research on transient characteristics of cavitation phenomena in pilot stage of jet pipe servo-valve", High Technol., vol. 26, pp. 85-91, 2020.
[78]
F.S. Chun, and F.T. Chen, "Mathematical model of steady state operation in jet pipe electro-hydraulic servo valve", J. Donghua Univ., vol. 30, pp. 269-275, 2013.
[79]
R. Li, S. Nie, M. Yi, and J. Ruan, "Simulation investigation on fluid characteristics of jet pipe water hydraulic servo valve based on CFD", J. Shanghai Univ., vol. 15, no. 3, pp. 201-206, 2011.
[http://dx.doi.org/10.1007/s11741-011-0721-2]
[80]
Y.B. Bao, X.G. He, and J.T. Wang, "Research on contamination sticking mechanism and influence of bias jet pressure servo valve", Machine Tools & Hydraul., vol. 49, pp. 19-24, 2021.
[81]
X.W. Xing, L. Wu, K.S. Chen, and C.C. Zhan, "Study on Optimization of structural parameters of jet amplifier for deflection plate servo valve", Hydraul. Pneum., vol. 3, pp. 16-21, 2018.
[82]
H.L. Wang, "Design and implementation of servo valve for jet deflection plate", Hydraul. Pneum., vol. 18, pp. 83-86, 2015.
[83]
Z.H. Liu, S.H. Wang, and W. Cao, "Optimum design method for jet stage of deflection plate jet servo valve", Hydraul. Pneum. Seal., vol. 35, pp. 19-21, 2015.
[84]
S.W. Zhang, H. Ji, X.M. Chen, W.B. Yuan, and B.L. Wu, "Effect of front stage erosion wear on jet deflector servo valve", Hydraul. Pneum. Seal., vol. 37, pp. 44-47, 2017.
[85]
C.L. Wang, F. Ding, Q.P. Li, and X.L. Xu, "Dynamic characteristics of jet disc servo valve-controlled electro-hydraulic position system", J. Chongqing Univ., vol. 12, pp. 11-15, 2003.
[86]
Y. Lu, "Mechanical characteristics and orthogonal test of deflection plate servo valve", M.S. thesis, Huazhong University of Science and Technology, 2018.
[87]
Z.H. Han, "Mechanical characteristics and orthogonal test research of deflection plate servo valve", M.S. thesis, Huazhong University of Science and Technology, Wuhan, China, 2018.
[88]
X.L. Ma, "Engineering modeling and Simulation Research of deflector jet electro-hydraulic servo valve", Hydraul. Pneum., vol. 15, pp. 83-85, 2015.
[89]
S.W. Zhang, "Simulation study on port erosion and valve characteristics change of jet deflection plate servo valve", M.S. thesis, Lanzhou University of Technology, Lanzhou, China, 2017.
[90]
Z.G. Liu, G.L. Yang, D.L. Yue, and G.X. Bai, "Effect of inlet and outlet oil damping holes on jet flow field of deflection plate jet valve", Machine Tools and Hydraulics, vol. 45, pp. 133-138, 2017.
[91]
Z.G. Liu, D.L. Yue, Z.Y. Yang, and G.X. Bai, "Simulation analysis of influence of nozzle width on jet efficiency of deflection plate jet valve", Hydraul. Pneum., vol. 12, pp. 27-32, 2016.
[92]
H. Ji, S.W. Zhang, X.Q. Liu, R.F. Li, and Q. Li, "The influence of wedge deformation of jet deflector on its zero position characteristic", J. Lanzhou Uni. Tech., vol. 44, pp. 45-49, 2018.
[93]
R.J. Ma, "FLUENT-based simulation of electro-hydraulic jet deflection plate servo valve", Metall. Equip., vol. 23, pp. 26-32, 2022.
[94]
H. Yan, F.J. Wang, C-C. Li, and J. Huang, "Research on the jet characteristics of the deflector–jet mechanism of the servo valve", Chin. Phys. B, vol. 26, no. 4, p. 044701, 2017.
[http://dx.doi.org/10.1088/1674-1056/26/4/044701]
[95]
B.H. Li, K.J. Wang, Y.F. Wang, and N. Jiang, "Experimental investigation on drag reduction in a turbulent boundary layer with a submerged synthetic jet", Chin. Phys. B, vol. 31, no. 2, p. 024702, 2022.
[http://dx.doi.org/10.1088/1674-1056/ac0da6]
[96]
C. Liu, and H. Jiang, "A seventh-order model for dynamic response of an electro-hydraulic servo valve", Chin. J. Aeronauti., vol. 27, no. 6, pp. 1605-1611, 2014.
[http://dx.doi.org/10.1016/j.cja.2014.10.029]
[97]
J.Y. Li, F.T. Dong, and S.M. Li, "“Modeling and stability analysis of multi-flexibility electro-hydraulic position servo system”, J. Har-bin Eng", Univ., vol. 25, pp. 57-63, 2020.
[98]
F.T. Dong, "Research on Electro-hydraulic Servo System with Multi-flexibility Link and Control Strategy of Neural Network", M.S. thesis, Harbin University of Technology Harbin, China, 2019.
[99]
Y.K. Xie, "Analysis and control strategy research of multiflexibility force control system", M.S. thesis, Harbin University of Technology, Harbin, China, 2021.
[100]
S. Chen, "Research on multi-degree-of-freedom elastic load modeling of electro-hydraulic servo vibration table", M.S. thesis, Harbin Engineering University, Harbin, China, 2017.
[101]
D. Zhou, A.E. Hazim, F.H. Zeng, and Z.R. Li, "Variable-domain dual-fuzzy control for large elastic load servo system", Chin. J. Mech. Eng., vol. 50, pp. 165-169, 2014.
[http://dx.doi.org/10.3901/JME.2014.13.165]
[102]
Y. Huang, C.S. Ding, and W.X. Shi, "Research on load stiffness in electro-hydraulic servo tester", Machine Tools and Hydraulics, vol. 04, pp. 9-11, 1999.
[103]
T. Wang, "Research on load stiffness adaptive control method of Electro-hydraulic Servo Tester", M.S. thesis, Jiangsu University of Science and Technology. Jiangsu, China, 2017.
[104]
Y.Z. Wang, "Research on characteristics of flexible-linked electro-hydraulic position servo system based on CMAC control strategy", M.S. thesis, Harbin University of Technology,Harbin, China, 2020.
[105]
G. Chen, "Fuzzy sliding mode tracking control for motor position servo system", Trans. Innov. Sci. Technol., vol. 31, pp. 16-18, 2011.
[106]
F.M. Cheng, "Research on correction of electro-hydraulic position servo system with load of negative elastic stiffness", M.S. thesis,Wuhan University of Science and Technology, Wuhan, China, 2014.
[107]
P.Y. Zhou, "Research on Hydraulic Position Servo System with Variable Stiffness Load", M.S. thesis, Yanshan University, Yanshan, China, 2019.
[108]
Y. Yu, B.Q. Shi, and Y.S. Hou, "Effect of structural stiffness on stability of hydraulic servo system", J. Agric. Eng., vol. 27, pp. 32-35, 2011.
[109]
Y.X. Chen, Z.Z. Ke, and H. Zhai, "Electro-hydraulic position servo system with variable stiffness elastic load", Mashin/Ha-Yi Kishavarzi, vol. 04, pp. 155-158, 2004.
[110]
Y.H. Ai, "Analysis of hydraulic stiffness and other parameters on characteristics of hydraulic position servo system", M.S. thesis, Wuhan University of Science and Technology, Wuhan, China,, 2015.
[111]
D.W. Li, "Research on Nonlinear Compensation Control and Application of Servo System", M.S. thesis, Beijing University of Technology, Beijing, China, 2016.
[112]
J.Z. Zhao, C. He, and Y.H. Zhang, "Research on nonlinear compensation algorithms for servo system gap", J. Beijing Inst. Technol., vol. 13, pp. 317-321, 2000.
[113]
Y. Zhao, "Research on non-linear clearance compensation method of electro-hydraulic servo vibration table", M.S. thesis, Harbin Engineering University, Harbin, China, 2020.
[114]
G. Tao, and Y. Ling, Parametrizations for adaptive control of multivariable systems with actuator nonlinearities. American Control Conference , pp. 2659-2663. Florida, USA
[115]
Y. Ling, G. Tao, and X.L. Ma, "Optimal and nonlinear decoupling control of systems with sandwiched backlash", Automatica, vol. 37, pp. 165-176, 2001.
[116]
Q.J. Zhao, "Control research on nonlinear characteristics of gap in industrial process", M.S. thesis, North China Electric Power University, Beijing, China, 2006.
[117]
D. Pan, Y. Zhao, X.G. Wang, and W.L. Ma, "Effect of reaction wheel hinge clearance on spacecraft dynamic characteristics", Shock Vib., vol. 31, pp. 71-75, 2012.
[118]
X. Yue, "Research on nonlinear control method of electro-hydraulic load simulator", M.S. thesis, Nanjing University of Technology, Nanjing, China, 2017.
[119]
T. Wang, X.M. Ma, X. Liu, and X.T. Qi, "“Model reference control method for electro-hydraulic servo system”", J. Xian. Eng. Univ., vol. 29, pp. 589-593, 2015.
[120]
M.L. Luo, J. Lin, Z.K. Yu, X.F. Wu, J.Y. Huang, and S.S. Sun, "Research on Steering Gear Nonlinear Control Based on Gap Equivalent Model", Micromotor, 2020.
[121]
W.L. Zheng, "Limit loop mechanism analysis and restraint technology of servo system with backlash nonlinearity", M.S. thesis, Harbin University of Technology, Harbin, China, 2016.
[122]
N. Li, "Effect of non-linearity of clearance on hydraulic position servo system and its compensation method", M.S. thesis, Lanzhou University of Technology, Lanzhou, China, 2014.
[123]
L. Han, "Research on Intelligent Control of Electro-hydraulic Servo System Based on RBF", Neural Network., 2009.
[124]
J.D. Tang, J.Y. Liu, X. Hu, and Y.F. Zhu, "Application research of electro-hydraulic proportional servo valve controlled volume speed regulation on broacher", Machine Tools and Hydraulics, vol. 43, pp. 86-89, 2015.
[125]
C.Z. Yang, and W.Y. Liu, "Simulation study on electro-hydraulic proportional servo control volume speed regulation system", Ma-chine Tools and Hydraulics, vol. 24, pp. 24-26, 2012.
[126]
G.L. Hu, and X.J. He, "Design and simulation analysis of hydraulic electro-hydraulic proportional speed control system", Coal Mine Machinery, vol. 30, pp. 25-27, 2009.
[127]
L.J. Feng, "Research on Nonlinear Model and Control Technology of Valve Control Servo System. 2021",
[128]
Y.B. Dai, and X. Lu, "Nonlinear predictive control of an electro-hydraulic servo system", Mach. Sci. Technol., vol. 37, pp. 1693-1697, 2018.
[129]
J. Fu, J.C. Maré, and Y. Fu, "Modelling and simulation of flight control electromechanical actuators with special focus on model architecting, multidisciplinary effects and power flows", Chin. J. Aeronauti., vol. 30, no. 1, pp. 47-65, 2017.
[http://dx.doi.org/10.1016/j.cja.2016.07.006]
[130]
Z.L. Shi, "Research on high-temperature characteristics of electro-hydraulic servo valve and its test system", M.S. thesis, Beijing Jiaotong University, Beijing, China, 2020.
[131]
Q. Liang, and F. Liu, Deadband compensation strategy and control characteristic simulation of electro-hydraulic servo valve with dif-ferential pressure feedback. ", In: Forging technology, vol. 47. 2022, pp. 158-161.
[132]
J. Huang, X. Wang, H. Wang, and H. Hao, "Development of a flow control valve with digital flow compensator", Flow Meas. Instrum., vol. 66, pp. 157-169, 2019.
[http://dx.doi.org/10.1016/j.flowmeasinst.2019.03.004]
[133]
H. Li, Y. Huang, G.M. Zhu, and Z. Lou, "Adaptive LQT valve timing control for an electro-hydraulic variable valve actuator", IEEE Trans. Contr Sys. Techn., vol. 27, no. 5, pp. 2182-2194, 2019.
[http://dx.doi.org/10.1109/TCST.2018.2861865]
[134]
Y.B. Zhao, C.P. He, X.B. Zhang, X.L. Wang, J.Y. Fu, and J.Y. Former, "Mechanical model of armature assembly of electro-hydraulic servo valve with force feedback", Flight Control and Detection, vol. 5, pp. 1-7, 2022.
[135]
Q.F. Zhang, L. Yan, Z.H. Duan, Z.X. Jiao, and C. Gerada, "High torque density torque motor with hybrid magnetization pole arrays for jet pipe servo valve", IEEE Transactions on Industrial Electronics, vol. 67, no. 3, pp. 2133-2142, 2020.
[136]
H. Zhang, M. Gao, and K. Guo, "The influence of servo valve opening on dynamic characteristics of electro-hydraulic servo system", Hydraulic, Pneumatic and Sealing, vol. 35, pp. 27-30, 2015.
[137]
L.L. Sun, "Adaptive control for time-varying parameter uncertain systems", M.S. thesis, China Institute of Metrology, Zhejiang, China,, 2013.
[138]
L.P. Xu, L.J. Cai, J. Li, D.F. Hu, and H.Y. Ma, "Control strategy of electro-hydraulic position servo system for milling machine tool based on auto-immunity control", Jisuanji Jicheng Zhizao Xitong, vol. 24, pp. 2770-2778, 2018.
[139]
Q.L. Xiao, and Z.Y. Li, "The application of structure invariance principle in electro-hydraulic servo system with large time-varying pa-rameters", In: Hydraul. Pneum, 1994, pp. 3-5.
[140]
D.P. Zhang, J.F. Wang, and H.G. Li, "Key graph modeling of P-Q servo valve and force control system", Hydraulic, Pneumatic and Sealing, no. Apr, pp. 21-23, 2005.
[141]
X. Gao, Y. Zhu, and D. Liang, "Modeling and simulation of electro-hydraulic servo system", J. Naval Engineering College, no. Apr, pp. 87-92, 1999.
[142]
H.S. Chen, State-space representation and calculation method of electro-hydraulic servo system.Hydraulic and Pneumatic, pp. 6-11. 1978
[143]
Q.F. Hao, and B.Q. Jin, State space modeling of electro-hydraulic position servo system. Machinery Management Development, pp. 42-43. 2013
[144]
H.G. Li, Y.X. Guo, and Y.D. Li, "Design of position control electro-servo system by state space method", Hydraulic and Pneumatic, no. Mar, pp. 31-43, . 1981
[145]
Y.X. Guo, State space method design of speed control electro-servo system. ", J. Natural Science of Heilongjiang University, pp. 13-21. 1982
[146]
P. Wang, "Research on control method of electro-hydraulic loading system", M.S. thesis, China University of Petroleum, Beijing, China, 2017.
[147]
H.H. Tan, and Y.J. Zhang, "Dynamic characteristics of multi-degree-of-freedom electro-hydraulic servo system", Hydraulic, Pneumatic and Sealing, vol. 24, pp. 39-41, 2016.
[148]
G.Q. Xu, Study on transfer function model of electro-hydraulic position servo control system. Machinery Management Development, pp. 33-34. 2013
[149]
M. Li, G. Meng, J. Jing, J. Liu, and Z. Zhong, "Application of Modelica/MWorks on modeling, simulation and optimization for electro-hydraulic servo valve system", Theor. Appl. Mech. Lett., vol. 2, no. 6, p. 063007, 2012.
[http://dx.doi.org/10.1063/2.1206307]
[150]
Z.L. Qiu, Dynamic performance analysis and Simulation of electro-hydraulic proportional valve based on matlab/simulinkDevelopment and innovation of electromechanical products, vol. 31. pp. 69-72. 2018
[151]
L. Chu, D. Zhao, and W.H. Li, "Modeling and dynamic characteristic simulation of high-speed switching solenoid valve in electro-hydraulic braking system", Automot. Eng., vol. 39, pp. 61-65, 2017.
[152]
T. Wang, X.M. Ma, X. Liu, and X.T. Qi, "Model reference control method for electro-hydraulic servo system", J. of Xi’an Engineer-ing University, vol. 29, pp. 589-593, 2015.
[153]
Y.B. He, G.R. Yan, Z.D. Zhang, and J.X. Xu, "Neural network parallel adaptive predictive PI control for electro-hydraulic servo system", Aviation Dynamics, vol. 14, pp. 22-26, 1997.
[154]
T. Zhou, and H. Wang, "Application of genetic optimization BP neural network in identification of hydraulic servo system", Mech. Eng., vol. 12, pp. 60-63, 2020.
[155]
S.J. Yu, "Robust iterative learning control method for electro-hydraulic servo force control system", M.S. thesis, Taiyuan University of Technology, Taiyuan, China, 2012.
[156]
D.C. Zhang, "Research on application of fuzzy adaptive control in electro-hydraulic servo system", M.S. thesis, Taiyuan University of Science and Technology, Taiyuan, China, 2013.
[157]
Y.B. Dai, "Nonlinear predictive electro-hydraulic servo control system based on state monitoring", Machine Tools and Hydraulics, vol. 50, pp. 70-75, 2022.
[158]
P.F. Ji, F.B. Hou, and Y. Du, "Control Research on Electro-hydraulic Servo System of Injection Molding Machine Based on Hybrid Particle Swarm Optimization", Machine Tool and Hydraulic, vol. 48, pp. 132-135, 2020.
[159]
X.F. Chen, "Research on high-precision position servo control of electro-hydraulic servo actuator", Hydraulic, Pneumatic and Sealing, vol. 40, pp. 45-49, 2022.
[160]
X. Li, and X.Y. Wang, "Research on Optimization of isothermal forging electro-hydraulic servo system based on EtherCAT and ge-netic-BP neural network", Electr. Eng., vol. 36, pp. 534-538, 2019.
[161]
D.M. Wonohadidjojo, G. Kothapalli, and M.Y. Hassan, "Position control of electro-hydraulic actuator system using fuzzy logic con-troller optimized by particle swarm optimization", Int. J. Autom. Comput., vol. 10, no. 3, pp. 181-193, 2013.
[http://dx.doi.org/10.1007/s11633-013-0711-3]
[162]
M.H. SUN, Y.Q. Wang, and H. Wang, "Application of adaptive predictive control on electric-hydraulic force servo system of cold rolling mill", Machine Tool & Hydraulics, vol. 44, pp. 135-137, 2016.
[163]
K. Huang, M. Gong, and H.Y. Zhong, "Control strategy of multipoint jacking system based on generalized predictive adjacent cou-pling theory", Zhongguo Jixie Gongcheng, vol. 27, pp. 2009-2014, 2016.
[164]
X.D. Wang, H.X. Luo, S.L. Li, and J.Y. Zhao, "Research on intelligent PID control strategy of electro-hydraulic servo force control system", Machine Tools and Hydraulics, vol. 15, pp. 255-258, 1996.
[165]
J.W. Fang, F. Yang, and J.S. Li, "Simulation study on force loading optimal control of electro-hydraulic servo system", CST, vol. 34, pp. 281-285, 2017.
[166]
Y.J. Li, and X.Y. Cao, "Research on electro-hydraulic servo control system", ICS, vol. 29, pp. 38-39, 2016.
[167]
T. Zhou, and H. Cheng, "Design of parameter self-tuning fuzzy PID controller for electro-hydraulic servo system", Machine Tool and Hydraulic, vol. 48, pp. 135-139, 2020.
[168]
G.H. Han, Y. Cui, and F.L. Yu, "Semi-physical simulation of control strategy for electro-hydraulic servo system", J. Harbin Eng. Univ., vol. 21, pp. 73-78, 2016.
[169]
Z.Y. Wei, Y.Q. He, and Y. Sun, "Application of weighted PID control in electro-hydraulic servo power control system", Engineering and Testing, vol. 61, pp. 35-37, 2021.
[170]
S.D. Liu, and X.P. Yang, "Research on optimal control method based on electro-hydraulic servo system", Machine Tools and Hydraulics, vol. 24, pp. 78-79, 2003.
[171]
W.J. Song, H.H. Tan, M. Huang, and J. Ye, "Research on electro-hydraulic position servo control system", Hydraul. Pneum., vol. 11, pp. 116-121, 2019.
[172]
S.L. Duan, and M.Z. Wang, "Adaptive sliding mode robust tracking control for electro-hydraulic position servo system", China Mech. Eng, vol. 24, pp. 16-19, 2004.
[173]
G.Q. Li, Y.S. Gu, J. Li, Y.S. Li, and B.J. Guo, "Adaptive backstepping sliding mode control for passive electro-hydraulic servo system", J. Mil Eng., vol. 38, pp. 616-624, 2017.
[174]
"[-hydraulic servo system based on adaptive genetic algorithm", Machine Tool & Hydraulics, vol. 47, pp. 78-83, 2019.
[175]
X.J. Wang, M.Z. Liu, and S. Chen, "Predictive function and sliding model controller of continuous rotary electro-hydraulic servo motor applied to simulator", J. Jilin Univ., vol. 49, pp. 1547-1557, 2019.
[176]
T. Liu, J.S. Zheng, and W.J. Chen, "A baffle structure for electro-hydraulic servo valves", CN Patent 204591846U, 2015.
[177]
Y.L. Zuo, "A sliding valve structure of an electro-hydraulic servo valve and an electro-hydraulic servo valve", CN Patent 214699324U, 2021.
[178]
J.Y. Li, Y.K. Xie, S. Xie, and J.J. Zhang, "A double valve parallel control hydraulic cylinder electrohydraulic control system", CN Patent 110671373A, 2021.
[179]
J.Y. Li, Y.K. Xie, S. Xie, and J.J. Zhang, "An electro-hydraulic control system based on parallel control of two different valves", CN Patent 212272670U, 2021.
[180]
G.H. Han, Y.X. Zhao, and D.Y. Chen, "Sensitivity analysis of electro-hydraulic servo system", CN Patent 110470A, 2019.
[181]
X. Yue, and J.Y. Yao, "A sign integral robust control method for self-adjusting error of electro-hydraulic torque servo system. Jiangsu Province", CN Patent 105867133B, p. 1019.
[182]
X. Yue, and J. Y. Yao, "An output feedback control method for electro-hydraulic load simulator. Jiangsu Province", CN Patent 106154833B, 2019.
[183]
L. Gao, H.J. Xu, and H.F. Yu, "Electro-hydraulic servo controller and its construction method, electro-hydraulic servo system and op-eration machinery", CN Patent 113864292A, 2021.
[184]
X. He, "Electro-hydraulic servo control module, electro-hydraulic servo card", CN Patent 112731835A,, 2021.
[185]
S.S. Xie, H.S. Tian, J.B. Peng, L.T. Ren, and Y. Zhang, "Hot backup dual redundancy electro-hydraulic servo valve control system based on line fluid parameters", CN Patent 103939406B, 2015.
[186]
Q. Guo, F. Guo, D. Jiang, Y. Shi, M. Xu, X. C. Li, and Y. Yan, "A multi-electro-hydraulic servo actuator tracking synchronization control method based on backstepping control", CN Patent 110081046B, 2020.
[187]
T.H. Pan, G. Zheng, Y.Z. Fu, and X.H. Ye, "Fault diagnosis method and device, storage medium and electronic equipment for electro-hydraulic servo valve", CN Patent 110486350B, 2020.
[188]
T.H. Pan, Y.F. Wang, G. Zheng, and C. Liu, "A method and system for fault diagnosis of electro-hydraulic servo valve based on migration learning", CN Patent 111985158A, 2020.
[189]
S.S. Fei, Y.F. Zhou, S.L. Chu, and L.H. Huang, "An on-line adjustment device for electro-hydraulic servo valve", CN Patent 110030231B, 2017.
[190]
K. Wang, W.X. Kong, C.D. Zhou, C.J. Liu, J. Liu, S.T. Kong, and C.H. Yang, "Electro-hydraulic servo PID control method and system based on dynamic matrix feed-forward prediction", CN Patent 105388764B, 2020.
[191]
L.J. Zhang, L.H. Wang, S.F. Cui, Y.Q. Li, and W.J. Lu, "A micro flow measurement system and method for electro-hydraulic servo valve", CN Patent 109489971B, 2020.
[192]
D. Chi, B. Wang, L.M. Wu, X.T. Bao, B. Xu, and B. Wang, "A hydraulic protection device for electro-hydraulic servo control system with redundancy", CN Patent 211924607U, 2020.
[193]
C.M. Li, Y.B. Xiang, and S.L. Li, "An electro-hydraulic servo valve with zero drift suppression of acceleration", CN Patent 108533816B, 2019.
[194]
X.L. Liu, and Z. Li, "Intelligent control method for steering gear hydraulic load simulator based on neural network identification", CN Patent 109814383A, 2019.
[195]
X.L. Liu, and Y. Su, "Intelligent control method for electro-hydraulic servo system of aircraft steering gear", CN Patent 109696836B, 2022.
[196]
X.L. Liu, Z. Cao, K. Yuan, Z. Li, and Y. Su, "A buffer spring for electro-hydraulic load simulator of variable pitch aircraft steering gear", CN Patent 208457081U, 2019.
[197]
H. Wang, C.G. Kui, T. Wang, and Z.T. Yang, "A double valve controlled hydraulic cylinder parallel synchronous control hydraulic loading system for aircraft steering gear", CN Patent 108397433A, 2018.
[198]
Z.X. Jiao, Z.H. Li, Y.X. Shang, and S. Wu, "Steering gear command dynamic compensation control method for excess force of elec-tro-hydraulic load simulator", CN Patent 106055753B, 2019.
[199]
Z.X. Jiao, S.S. Han, Y.X. Shang, J.Y. Yao, and S. Wu, "Speed synchronization control method and system for load simulator", CN Patent 103577244A, 2014.
[200]
H.G. Xu, and D.K. Zheng, "Unidirectional friction-loaded electro-hydraulic load simulator without excess torque", CN Patent 104730935A, 2015.
[201]
G.H. Cao, T. Jiang, Z.H. Wang, H.P. Wang, C. He, and Y.G. Li, "Electro-hydraulic load simulator with low pressure oil pump", CN Patent 1017380B, 2013.
[202]
J.Y. Li, and H. Liang, "An electro-hydraulic load simulator with adjustable load and disturbance arm length", CN Patent 113341766A, 2021.
[203]
C.Y. Luo, and Q. Xu, "Impact analysis method of load simulator parameters based on SIMULINK", CN Patent 109426140B, 2022.
[204]
G.H. Zong, X.H. Zhang, S.S. Bi, X. Pei, J.J. Yu, and W. Li, "A load simulator based on parallel mechanism", CN Patent 102175441B, 2022.
[205]
B. Zhang, and Y.H. Sun, "A load simulator based on hysteresis braking", CN Patent 109949656A, 2019.