Dynamic Characteristic Analysis of Hydraulic Servo System in a Mold Oscillating Mechanism

2014 ◽  
Vol 1025-1026 ◽  
pp. 183-191 ◽  
Author(s):  
Yong Hui Park ◽  
Hyun Chul Park
Keyword(s):  
Servo System ◽  
Characteristic Analysis ◽  
Operation Conditions ◽  
Design Variables ◽  
Hydraulic Servo ◽  
Natural Characteristic ◽  
Hydraulic Servo System ◽  
The Stability ◽  
Oil Gas ◽  
Force Equilibrium

In this study, a hydraulic servo system for mold oscillating mechanism was investigated. In order to check the efficiency and the stability of system, its geometrical designs, which change the natural characteristic of system, including a spool volume, area of piston, and so on were analyzed by a non-linear model. The model was composed of the equation of orifice, the continuity equation, and the force equilibrium including a variable effective bulk modulus belonging to operating oil, gas, and cylinder. All simulations were conducted by the MATLAB SIMULINK, and simulated as specific conditions corresponding real operation conditions in the steel industry. According to the analysis, the relation between a controller, servo design, and system performance was investigated with physical means. And, the fact that not compared to other design variables, the entrance shape on spool was dominant to determine the stability and the performance of system, was found. Furthermore, a fault detection method, and optimization problem including this work were discussed.

Simulation of Hydraulic Servo System Based on Dynamic Monitoring in Mechanical Engineering

2013 ◽  
Vol 644 ◽  
pp. 85-88
Author(s):  
Jia Dong Dong ◽  
Li Chen Gu
Keyword(s):  
Real Time ◽  
Mechanical Engineering ◽  
Servo System ◽  
System Model ◽  
Dynamic Monitoring ◽  
Belt Conveyor ◽  
Hydraulic Servo ◽  
Axis Position ◽  
Hydraulic Servo System ◽  
The Stability

Sensor system of the belt conveyor is designed, then corrective and alarm command is given. According to the signal of real-time monitoring, belt deviation state is determined, and roller axis position is adjusted in order to achieve the purpose of deviation – adjusting. Based on dynamic monitoring of the belt conveyor, corrective devices are constructed, and hydraulic servo system model is designed by Matlab software in this paper, then the stability of the system is analyzed.

Dynamic Modeling and Tracking Control Simulation for Large Electro-Hydraulic Servo System

2013 ◽  
Vol 416-417 ◽  
pp. 811-816 ◽  
Author(s):  
Feng Li ◽  
Kai Wang ◽  
Cheng Li Ma ◽  
Jie Yu
Keyword(s):  
Tracking Control ◽  
Data Exchange ◽  
Sliding Mode ◽  
Servo System ◽  
Simulation Models ◽  
Simulation Method ◽  
Operation Conditions ◽  
Software Interfaces ◽  
Hydraulic Servo ◽  
Hydraulic Servo System

The co-simulation method of one large electro-hydraulic servo system based on software interface is proposed in this paper. The rigid-flexible-coupling dynamic model of the electro-hydraulic servo mechanism was built through data exchange of SolidWorks, ANSYS and ADAMS, the hydraulic system model and control system framework was built by EASY5 environment, the controller was built by Simulink. The integration of simulation models for the large electro-hydraulic servo system was realized by software interfaces. In view of the poor operation conditions, the high requirement of control precision and real-time characteristics, adaptive fuzzy sliding mode control strategy was applied to position tracking control of the servo system. Simulation results verified the effectiveness of this method.

Model Reference Adaptive Control on a Hydraulic Servo System

2011 ◽  
Vol 268-270 ◽  
pp. 505-508
Author(s):  
Zhi Yong Qu ◽  
Zheng Mao Ye
Keyword(s):  
Servo System ◽  
Adaptive Controller ◽  
Fast Response ◽  
System Stability ◽  
Servo Systems ◽  
Hydraulic Servo ◽  
Hydraulic Servo System ◽  
Simulation Results ◽  
The Stability ◽  
Model Reference Adaptive

Hydraulic servo systems are usually used in industry. This kind of system is nonlinear in nature and generally difficult to control. The ordinary linear constant gain controller can cause overshoot or even loss of system stability. Application of adaptive controller to a nonlinear hydraulic servo system is investigated in this paper. The dynamic model of the system is given and the stability is also analyzed using Popov's criterion. The steady state error can be eliminated using adaptive controller combined with an integration term. Simulation results show the performance of adaptive controller with fast response and less overshoot

Study of Hydraulic Servo System Based on Fuzzy Sliding Mode Algorithm

2013 ◽  
Vol 753-755 ◽  
pp. 2674-2678
Author(s):  
Kun Yang ◽  
Cai Jun Liu ◽  
Shu Min Liu
Keyword(s):  
Control Algorithm ◽  
Sliding Mode ◽  
Servo System ◽  
Time Varying ◽  
External Interference ◽  
System A ◽  
Hydraulic Servo ◽  
Fuzzy Sliding Mode ◽  
Hydraulic Servo System ◽  
Position Servo

Based on the situation that the hydraulic position servo system is easily influenced by the external interference and the parameters of which are different with time-varying, the fuzzy control can soften the buffeting and the sliding algorithm has no the same problems as the hydraulic position servo system, a brandly-new fuzzy sliding control algorithm is designed. In the simulation process, within the parameters of simulated time-varying and outside strong interference, the results show that the hydraulic servo system based on fuzzy sliding mode control algorithm has a greater resistance to internal and external interference and time-varying parameters.

The Modeling and Control of the Hydraulic Servo System by Using On-Off Valve

2000 ◽  
Author(s):  
Xuanyin Wang
Keyword(s):  
Servo System ◽  
Mathematic Model ◽  
Hydraulic Cylinder ◽  
Servo Control ◽  
Linear Quadratic ◽  
Modeling And Control ◽  
Hydraulic Servo ◽  
Self Tuning ◽  
Hydraulic Servo System ◽  
And Control

Abstract This paper researches on the hydraulic servo system by using ordinary on-off valves. The mathematic model of an asymmetric hydraulic cylinder servo control system is built, and its characteristic is analysed here. To reduce the static and dynamic characteristic differences between forward and reverse motion of asymmetric cylinder, and improve system’s performance, a self-tuning linear quadratic gaussian optimum controller (SLQG) is designed successful. In the end, an asymmetric hydraulic cylinder servo system of paint robot is researched. The result shows that the above method is effective.

Sign in / Sign up

Export Citation Format

Share Document