This paper researches the electro hydraulic control system of two-column shield hydraulic supports, takes the hydraulic support base advancing loop as the position servo control system, and studies its dynamic characteristics. It establishes the power amplifier, position sensor, hydraulic cylinder and loading mathematical model of the position servo control system, determines the model parameters of the advancing control system according to the shield hydraulic support used in the 1315 working face of GuoTun coal mine, and derives the opening loop transfer function of the valve controlled advancing cylinder. This paper also analyzes the stability of the control system of the advancing loop with the modern design method, and verifies the stability of the electro-hydraulic control system loop according to the simulation curve and the stability. By comparing with the valve core displacement and system flow curve while the system opening or closing, this paper explains the application effect of servo control system. It provides a new research idea and method for the study of the overall stability and effectively reduces the failure rate of electro-hydraulic control system of the hydraulic support. It also plays practical significance and value to improve the mining efficiency of the coal mining face.
[1]
Mohieddine Jelali,et al.
Hydraulic servo-systems
,
2003
.
[2]
Tian Mu-qin,et al.
One realization method for remote control of hydraulic support of the electro-hydraulic in coal mine face
,
2010,
2010 IEEE 11th International Conference on Probabilistic Methods Applied to Power Systems.
[3]
He Xuewen.
Integral Sliding Mode Control for Electrohydraulic Servo System
,
2011
.
[4]
Zhong De-hua.
Research and Application on Electro-hydraulic Servo Control System
,
2008
.
[5]
A. Kugi,et al.
Mathematical Modeling and Nonlinear Controller Design for a Novel Electrohydraulic Power-Steering System
,
2007,
IEEE/ASME Transactions on Mechatronics.
[6]
Can Zhao,et al.
Electro-hydraulic control research of hydraulic support hand-control directional valve with the MR fluid base
,
2010
.