旋转直接驱动电液压力伺服阀稳定性分析
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同济大学 机械与能源工程学院,同济大学 机械与能源工程学院,同济大学 机械与能源工程学院,南京机电液压工程研究中心、航空机电系统综合航空科技重点实验室

中图分类号:

TH137.5

基金项目:

国家自然科学基金资助项目(51475332、51605333),流体动力与机电系统国家重点实验室开放基金资助项目(GZKF-201518)

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    摘要:

    针对最新研制的旋转直接驱动电液压力伺服阀(RDDPV)出现输出压力振荡问题;建立了其数学模型和简化框图,得到了RDDPV稳定性判据,并提出了解决方案。RDDPV取消了传统压力伺服阀的机械和液压反馈,采用马达转角内闭环和输出压力外闭环的电反馈伺服控制。研究表明,当阀芯处于进回油口中间位置附近,稳态液动力表现为阀芯位移的正反馈作用,导致整阀机械液压部分刚度为负,稳定性差;此时,马达转角内闭环电反馈刚度对整阀稳定性至关重要。数值模拟和试验表明,增加马达转角电反馈系数,增加了伺服阀电反馈刚度,提高了伺服阀的稳定性。

    Abstract:

    Aimed at the problem that the output pressure of newly developed rotary direct drive electrohydraulic pressure control servo valve (RDDPV) was oscillating, the mathematical model and block diagram of RDDPV were established, and the stability criteria was obtained. In RDDPV, the electrical feedback of motor rotational angle and output pressure are used instead of traditional mechanical or hydraulic feedback. When the spool valve near the middle position between inlet and outlet port, steady state flow forces provides the positive feedback on spool motion, leads to a negative stiffness of mechanical and hydraulic parts, and the stability of RDDPV is poor. In order to improve the stability of RDDPV, the electrical feedback stiffness of the servo valve was improved by increasing the electrical feedback coefficient of motor rotational angle. Numerical simulation and experiment results shown that the stability of RDDPV can be effectively improved by increasing the electrical feedback coefficient of motor rotational angle.

    参考文献
    [1] Vanderlaan R D, Meulendyk J W. Direct Drive Valve-Ball Drive Mechanism: U.S. Patent 4,672,992[P]. 1987-6-16.
    [2] Haynes L E, Lucas L L. Direct Drive Servo Valve: U.S. Patent 4,793,377[P]. 1988-12-27.
    [3] 王海玲.某型旋转直接驱动式伺服阀的研制[J].机床与液压, 2015, 43(22):81-83.WANG Hailing. Research on a Direct-drive Electro-hydraulic Servo-valve[J]. Machine Tool Hydraulics, 2015, 43(22):81-83. (in Chinese)
    [4] Charrier J J, Kulshreshtha A. Electric Actuation for Flight Engine Control System: Evolution, Current Trends Future Challenges[C]//45th AIAA Aerospace Sciences Meeting and Exhibit. 2007: 2007-1391.
    [5] 訚耀保.极端环境下的电液伺服控制理论及应用技术[M].上海:上海科学技术出版社,2012.YIN Yaobao.Electro-Hydraulic Servo Control Theory and Application Technology Under Extreme Environment [M].Shanghai: Shanghai Science and Technology Press, 2012.(in Chinese)
    [6] Hayashi S. Instability of Poppet Valve Circuit [J].JSME international journal.Ser. C,Dynamics,control,robotics,design and manufacturing,1995,38(3):357-366.
    [7] Porteiro J L F, Weber S T, Rahman M M. Experimental Study of Flow Induced Noise in Counterbalance Valves [C].New York: America Society of Mechanical, 1997: 557-562.
    [8] Kook H. Analysis of The Periodic Pressure Fluctuation Induced by Flow Over A Cavity [J]. Journal of Sound and Vibration, 2002(251): 823―846.
    [9] Geveci M, Oshkai P, Rockwell D. Imaging of The Self-Excited Oscillation of Flow Past a Cavity During Generation of a Flow Tone [J]. Journal of Fluids and Structures, 2003(18): 665-694.
    [10] Watton J. The Effect of Drain Orifice Damping on the Performance Characteristics of a Servovalve Flapper/Nozzle Stage [J]. Journal of Dynamic Systems, Measurement, and Control, 1987, 109(1): 19-23.
    [11] Li Hao, Li Songjing, Peng Jinghui. Study of Self-Excited Noise and Pressure Oscillations in a Hydraulic Jet-Pipe Servo-Valve with Magnetic Fluids [C]. Harbin: Space Control and Inertial Technology Research Center Of Harbin Institute of Technology, 2010: 442-447.
    [12] 陈元章.基于CFD的伺服阀衔铁组件啸叫分析[J].机床与液压,2013.3,41(5):70-74.CHEN Yuanzhang. Analysis on Whistling of the Armature Component of Servovalve Based on CFD[J]. Machine Tool Hydraulics,2013.3,41(5):70-74. (in Chinese)
    [13] Jelali M, Kroll A. Hydraulic servo-systems: Modelling, Identification and Control[M]. Springer Science Business Media, 2012.
    [14] Dasgupta K. Analysis of a Hydrostatic Transmission System Using Low Speed High Torque Motor[J]. Mechanism and machine theory, 2000, 35(10): 1481-1499.
    [15] 訚耀保, 原佳阳, 傅俊勇. 先导阀前腔串加阻尼孔的新型双级溢流阀特性分析[J]. 吉林大学学报(工学版), 2017, 47(1):129-136.YIN Yaobao, YUAN Jiayang, FU Junyong. Characteristics of Two-Stage Relief Valve With a Series Damping Orifice in Pilot Valve Front Chamber[J]. Journal of Jilin University(Engineering and Technology Edition), 2017, 47(1):129-136. (in Chinese)
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原佳阳,訚耀保,夏飞燕,方向.旋转直接驱动电液压力伺服阀稳定性分析[J].同济大学学报(自然科学版),2018,46(02):235~240

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  • 收稿日期:2017-01-04
  • 最后修改日期:2018-01-04
  • 录用日期:2017-11-15
  • 在线发布日期: 2018-03-20
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