Effect of sink flow on dual-valve electro-hydraulic excitation system

In this study, the main goal is to investigate the displacement gain characteristics of novel dual-valve Electro-Hydraulic Excitation system (EHES). Relative to conventional system, the dual-valve system can improve the amplitude range, but the range is always affected by some nonlinear factors. In order to analysis on the issue, a nonlinear mathematical model of dual-valve EHES is established based on Bernoulli and classical electro-hydraulic servo equation. Then, the results of numerical simulations by using of the MATLAB/Simulink software are compared with experimental results. Simulation and experimental results show that the sink flow mainly influences on the flow dynamic characteristics of dual-valve EHES. Because of that, dual-valve EHES only can improve 50 %-70 % of displacement within 5 to 50 Hz of excitation frequency and 45 %-80 % of displacement amplitude within 20 % to 100 % of command value.

[1]  Niko Herakovic,et al.  Modelling of Hydraulic Spool-Valves with Specially Designed Metering Edges , 2014 .

[2]  J Ruan,et al.  An electrohydraulic vibration exciter using a two-dimensional valve , 2009 .

[3]  Yi Liu,et al.  AMESim Based Numerical Analysis for Electrohydraulic Exciter Applied on New Tamper , 2012 .

[4]  Weijie Mao,et al.  Parameter-dependent vibration-attenuation controller design for electro-hydraulic actuated linear structural systems , 2012, Earthquake Engineering and Engineering Vibration.

[5]  Marek Sibielak,et al.  The Control System for a Vibration Exciter , 2013 .

[6]  Dehong Yu,et al.  State feedback integral control for a rotary direct drive servo valve using a Lyapunov function approach. , 2015, ISA transactions.

[7]  Zi Ming Kou,et al.  Numerical Simulation and Experimental Analysis of an Active Hydraulic Excitation System Based on Pulsating Flow , 2011 .

[8]  Jian Ruan,et al.  Output waveform analysis of an electro-hydraulic vibrator controlled by the multiple valves , 2014 .

[9]  Kyoung Kwan Ahn,et al.  Self-tuning of quantitative feedback theory for force control of an electro-hydraulic test machine , 2009 .

[10]  Guan,et al.  APPLICATION OF FRF ESTIMATOR BASED ON ERRORS.IN-VARIABLES MODEL IN MULTI-INPUT MULTI-OUTPUT VIBRATION CONTROL SYSTEM , 2007 .

[11]  Jian Zhuo Zhang,et al.  Study on High Frequency Hydraulic Exciter Based on Rotary Valve Control , 2012 .

[12]  Guo-fang Gong,et al.  Waveforms analysis and optimization of new electro-hydraulic excitation technology , 2014 .

[13]  Guo-fang Gong,et al.  Mechanism of electro-hydraulic exciter for new tamping device , 2014 .

[14]  Mao Hsiung Chiang,et al.  The Leveling Position Control of a Four-Axial Active Pneumatic Isolation System Using PWM-Driving Parallel Dual-On/Off Valves , 2011 .

[15]  Kou Ziming.  Characteristics Analysis and Development Summary on Hydraulic Exciting Ways of Vibrating Machine , 2007 .

[16]  Noriaki Satoh.  Frequency characteristics of electro-hydraulic vibrator. , 2002, Journal of UOEH.

[17]  Lu,et al.  Analysis on the Pressure Fluctuation Law of a Hydraulic Exciting System with a Wave-exciter , 2011 .

[18]  Jun Wang,et al.  Model predictive control of servo motor driven constant pump hydraulic system in injection molding process based on neurodynamic optimization , 2014, Journal of Zhejiang University SCIENCE C.

[19]  S. H. Wang,et al.  Hydraulic square-wave pressure generator with a specific rotating valve , 2009 .

[20]  Farid Golnaraghi,et al.  Effect of localized faults on chaotic vibration of rolling element bearings , 2008 .

[21]  Jian,et al.  Separate Control of High Frequency Electro-hydraulic Vibration Exciter , 2011 .