ACTA AERONAUTICAET ASTRONAUTICA SINICA >
Characteristics of direct-acting airborne 2D electro-hydraulic pressure servo valve
Received date: 2017-03-31
Revised date: 2017-06-09
Online published: 2017-06-09
Supported by
National Natural Science Foundation of China (51375445); Public Welfare Project of Science Technology Department of Zhejiang Province (2016C31056)
A direct-acting Two Dimensional (2D) electro-hydraulic servo valve is designed, in which the main spool is driven by the 2D servo piston mechanism to get the load pressure as required. Linear Variable Differential Transformer(LVDT) is used for testing and forming closed loop position feedback.The displacement of piston can be controlled precisely using closed-loop feedback. The opening degree of the main spool connecting to the piston with a spring is changed by the force of the spring produced by the movement of the piston under the pressure difference on both sides to control the load pressure as accurately as possible. Based on the theory of squeeze oil film, a disc structure is applied to the main spool to increase the damping ratio and to improve the stability and reliability of the system. Static and dynamic characteristics are analyzed by simulating the mathematical model of the valve, and the feasibility of the prototype is verified in the experiment. The results demonstrate good characteristics of voltage follower and stable output, with the step response time being 30 ms, the hysteresis less than 3%, and the linearity less than 2%, when the system pressure is 28 MPa. Compared with traditional direct-acting proportional servo valve, the valve has the advantages of strong anti-pollution, high reliability, light weight and small volume (about 1/5 in mass and 1/7 in volume of the same kind of servo valve), and is very suitable for the airborne hydraulic braking system.
Key words： airborne; two-dimensional piston; pressure servo; LVDT; stability
ZUO Xiqing , RUAN Jian , LIU Guowen , YU Zheqing . Characteristics of direct-acting airborne 2D electro-hydraulic pressure servo valve[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2017 , 38(11) : 421294 -421294 . DOI: 10.7527/S1000-6893.2017.421294
[1] 闫耀保. 极端环境下的电液伺服阀控制理论及应用技术[M]. 上海:上海科学技术出版社, 2012:2-4. YAN Y B. Control theory and application technology of electro hydraulic servo valve in extreme environment[M]. Shanghai:Shanghai Scientific & Technical Publishers, 2012:2-4(in Chinese).
[2] 郑磊, 胡建波. 基于STAMP/STPA的机轮刹车系统安全性分析[J]. 航空学报, 2017, 38(1):320144. ZHENG L, HU J B. Safety analysis of wheel brake system based on STAMP/STPA[J]. Acta Aeronautica et Astronautica Sinica, 2017, 38(1):320144(in Chinese).
[3] 黄澄, 焦宗夏, 尚耀星. 考虑管路的飞机液压刹车系统压力振荡分析[J]. 北京航空航天大学学报, 2014, 40(2):210-215. HUANG C, JIAO Z X, SHANG Y X. Pressure oscillation analysis of aircraft hydraulic braking system considering pipeline[J]. Journal of Beijing University of Aeronautics and Astronautics, 2014, 40(2):210-215(in Chinese).
[4] ZHANG M, NIE H, WEI X H, et al. Research on modeling and simulation for aircraft anti-skid braking[C]//2nd International Symposium on Systems and Control in Aerospace and Astronautics. Piscataway, NJ:IEEE Computer Soceity, 2008:1-5.
[5] WEI J H, KONG X W, QIU M X, et al. Transient response of a valve control hydraulic system with long pipes[J]. Chinese Journal of Mechanical Engineering, 2004, 17(1):31-35.
[6] 路甬祥. 液压气动技术手册[M]. 北京:机械工业出版社, 2002:431-435. LU Y X. Hydraulic & pneumatic technical manual[M]. Beijing:Machinery Industry Press, 2002:431-435(in Chinese).
[7] 黄志坚, 王钦若. 电液伺服阀与比例控制装置使用与维修[M]. 北京:中国电力出版社, 2009:293-295. HUANG Z J, WANG Q R. Electro-hydraulic servo valve and proportional control device use and maintenance[M]. Beijing:China Electric Power Press, 2009:293-295(in Chinese).
[8] 孙卫华, 胡贵彦. 新型机载作动系统研究[M]. 北京:中国物资出版社, 2009:9-10. SUN W H, HU G Y. Research on new airborne actuating system[M]. Beijing:China Materials Press, 2009:9-10(in Chinese).
[9] RUAN J, UKRAINETZ P, BURTON R. Frequency domain modeling and identification of 2D digital servo valve[J]. International Journal of Fluid Power, 2000, 1(2):76-85.
[10] LI S H, RUAN J, BURTON R, et al. 2D simplified servo valve[J]. Chinese Journal of Mechanical Engineering, 2003, 16(2):132-135.
[11] RUAN J, BURTON R, UKRAINETZ P, et al. Two-dimensional pressure control valve[J]. Proceedings of the Institution of Mechanical Engineers-Part C -Journal of Mechanical Engineering Science, 2001, 215(9):1031-1039.
[12] RUAN J, BURTON R, UKRAINETZ P. An investigation into the characteristics of a two dimensional(2D) flow control valve[J]. Journal of Dynamic Systems Measurement & Control, 2002, 124(1):214-220.
[13] RUAN J, UKRAINETZ P, BURTON R. Hydraulic bridge for pressure control in a P-Q multiple line segment control valve[J]. International Journal of Fluid Power, 2003(4):1-7.
[14] RUAN J, BURTON R, UKRAINETZ P. Direct actuated digital servo valve[C]//The Ninth Scandinavian International Conference on Fluid Power, 2005:450-461.
[15] 李胜, 阮健, 孟彬. 2D数字阀滞环颤振补偿技术研究[J]. 农业机械学报, 2011(3):208-212, 218. LI S, RUAN J, MENG B. Dither compensation technology for hysteresis of 2D digital valve[J]. Chinese Society for Agricultural Machinery, 2011(3):208-212,218(in Chinese).
[16] 阮健. 电液直接数字控制[M]. 杭州:浙江大学出版社, 2000:59-61. RUAN J. Electro-hydraulic direct digital control[M].Hangzhou:Zhejiang University Press, 2000:59-61(in Chinese).
[17] 左希庆, 刘国文, 江海兵, 等. 2D电液伺服流量阀特性研究[J]. 农业机械学报, 2017,48(2):400-406. ZUO X Q, LIU G W, JIANG H B, et al. Characteristics of airborne 2D electro-hydraulic servo flow valve[J]. Chinese Society for Agricultural Machinery, 2017,48(2):400-406(in Chinese).
[18] 左希庆, 阮健, 李胜, 等. 波登管2D压力伺服阀反馈装置的特性研究[J]. 中国机械工程, 2017,28(4):451-455. ZUO X Q, RUAN J, LI S, et al. Research on characteristics of bourdon tube 2D pressure servo-valve feedback equipment[J]. China Mechanical Engineering, 2017,28(4):451-455(in Chinese).
[19] 王莉娜, 陈国定, 孙恒超. 轴承腔油滴沉积特性及油膜流动特征分析[J]. 航空学报, 2016, 37(10):3159-3169. WANG L N, CHEN G D, SUN H C. Characteristics analysis of oil droplet deposition and oil film flow in a bearing chamber[J]. Acta Aeronautica et Astronautica Sinica, 2016, 37(10):3159-3169(in Chinese).
[20] 夏胜枝, 欧阳明高, 周明. 高速强力电磁阀挤压油膜阻尼的研究[J]. 机械工程学报, 2003, 39(7):84-88. XIA S Z, OUYANG M G, ZHOU M. Analysis of squeeze film for high-speed and powerful solenoid valve[J]. Journal of Mechanical Engineering, 2003, 39(7):84-88(in Chinese).
[21] 左希庆, 阮健, 孙坚, 等. 基于挤压油膜理论的2D电液压力伺服阀稳定性分析[J]. 中国机械工程, 2017, 28(5):537-543. ZUO X Q, RUAN J, SUN J, et al. Stability analysis of 2D electro-hydraulic pressure servo valve based on squeeze oil film theory[J]. China Mechanical Engineering, 2017, 28(5):537-543(in Chinese).
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