scholarly journals Analysis of energy absorption characteristics of corrugated top beam of anti-impact hydraulic support

2021 ◽  
Author(s):  
JUN MAO ◽  
Chenghu GUO ◽  
MIAO XIE
Keyword(s):  
Control System ◽  
Simulation Analysis ◽  
Order Term ◽  
Response Speed ◽  
Hydraulic Cylinder ◽  
Phase Lag ◽  
Mobile Platforms ◽  
Hydraulic Cylinders ◽  
Hydraulic Servo ◽  
Uncertain Disturbance

Abstract To solve the problem that the response of the walking platform of bricklaying robot is slow and uncertain factors such as load change and friction of hydraulic cylinder affect the adjustment accuracy, an electro-hydraulic servo system with four hydraulic cylinders is designed. The system is an improved ADRC method. The available information of the whole system is fully considered, and the piston rod position deviations of the hydraulic cylinder is taken as the input of the whole controller to reduce the phase lag caused by the extended observer and improve the response speed of the control system. The position deviations of the piston rod in a cylinder is compensated by observation, and the high-order term and uncertain disturbance in the whole control system are defined as total disturbance, so the structure of the controller is simplified appropriately. Finally, MATLAB and AMESim are used for simulation analysis. The simulation results show that the improved ADRC method can significantly improve the response speed of the system and the suppression of uncertain disturbance. This research provides a theoretical basis for the research of masonry robot mobile platforms.

Research of Hydraulic Cylinders Dynamic Characteristic and Synchrocontrol on Horizontal Pipes Connector in Deep Sea

2012 ◽  
Vol 164 ◽  
pp. 421-424
Author(s):  
Zhuo Wang ◽  
Yan Jie Li ◽  
Bo Zhang ◽  
Wei Zhang ◽  
Y.Z. Zhang
Keyword(s):  
Dynamic Characteristic ◽  
Deep Sea ◽  
Hydraulic System ◽  
Pid Controller ◽  
Simulation Analysis ◽  
Hydraulic Cylinder ◽  
Horizontal Pipes ◽  
Differential Coefficient ◽  
Hydraulic Cylinders ◽  
Hydraulic Servo

The electro-hydraulic position-servo synchronization system of horizontal pipes connector was designed in order to connect two pipes in deep sea and make sure the journey of synchronization hydro-cylinders in the hydraulic system is less than 2 mm.Its transfer function of symmetric servo controlling oil-cylinder electro-hydraulic servo system were derived . Simulation analysis of its dynamic characteristic was done, and PID controller was applied on the system to regulate two hydraulic cylinder synchronization controls. In the end ,when the proportionality coefficient is Kp=0.55,integral coefficient is Ki=60,differential coefficient is Kd=0,the error of synchronic displacement was less than 0.5 mm, that achieved the request of the control system.

Simulation and Optimization Research of Multi-Stud Tensioning Machine Controlled by Servo Valve

2013 ◽  
Vol 664 ◽  
pp. 871-877
Author(s):  
Xiao Dong Tan ◽  
Wei Ji ◽  
Zhi Bo Luan
Keyword(s):  
Dynamic Characteristics ◽  
Pid Controller ◽  
Simulation Analysis ◽  
Mathematic Model ◽  
Hydraulic Cylinder ◽  
Simulation And Optimization ◽  
Hydraulic Cylinders ◽  
Hydraulic Servo ◽  
Hydraulic Servo System ◽  
The Stability

In this paper, we base on the simulation analysis of the electro-hydraulic servo system about dual hydraulic cylinders parallel driving Multi-Stud Tensioning Machine, focus on the dynamic characteristics of a single hydraulic cylinder (asymmetric hydraulic cylinder), make use of Matlab Simulink module to carry on to imitate, and design a PID controller to correct the system. The results of simulation prove correctness of the system mathematic model, and the stability of the system is obviously improved.

Design and Integrated Simulation of the Electro-Hydraulic Servo System Based on AMESim and Matlab

2010 ◽  
Vol 44-47 ◽  
pp. 1355-1359 ◽  
Author(s):  
Xiang Xu ◽  
Zhi Xiong Li ◽  
Hong Ling Qin
Keyword(s):  
Control System ◽  
Design Method ◽  
Design Procedure ◽  
Servo System ◽  
Hydraulic Cylinder ◽  
Fast Response ◽  
Simulation Design ◽  
Integrated Simulation ◽  
Hydraulic Servo ◽  
Hydraulic Servo System

Since electro-hydraulic servo system has fast response and highest control accuracy, it has been widely used in industrial application, including aircraft, mining, manufacturing, and agriculture, etc. With the fast development of computer science, it is feasible and available to evaluate the performance of the designed control system via virtual simulation before the practical usage of the system. In order to optimize the design procedure of the electro-hydraulic proportional controller, the co-simulation design method based on AMESim-Matlab is presented for the electro-hydraulic servo system in this paper. High accuracy of the mathematical model of electro-hydraulic servo system was full-fitted by the use of AMESim, and the advantage of high solving precision for large amount of calculation was full played using Matlab. The PID controller was employed to realize the efficient control of the motion of the hydraulic cylinder. The united simulation technique was adopted to verify the good performance of the designed control system. The simulation results suggest that the proposed method is effective for the design of electro-hydraulic servo systems and thus has application importance.

Study on Material-Cutting with Electro-Hydraulic Servo Synchronization Control System for Large Band Saw Equipment

2013 ◽  
Vol 675 ◽  
pp. 86-90
Author(s):  
Guo Jin Chen ◽  
Jing Ni ◽  
Tin Tin Liu ◽  
Hui Peng Chen ◽  
Ming Xu
Keyword(s):  
Control System ◽  
Force Feedback ◽  
Synchronization Control ◽  
Servo Drive ◽  
Nc System ◽  
Hydraulic Cylinders ◽  
Hydraulic Servo ◽  
Control Technologies ◽  
Band Saw ◽  
Movement Synchronization

Aiming at the cutting for various kinds of material, in order to solve the problems that the present large band saw equipment at home is poor in the synchronization of the sawing feed and is lack of the dedicated NC system, the paper introduces the electro-hydraulic servo drive and digital control technologies, researches the synchronous servo drive and cutting force feedback control technologies, and develops the sawing machine’s control system based on the above technologies. The NC system has been applied in the CNC band saw equipment of the large Portal style. The saw frame uses the structure driven synchronously by the dual hydraulic cylinders in order to guarantee the accuracy of the feed motion. The control system driven by the electro-hydraulic servo synchronization detects the implementation of a two cylinders and does the displacement feedback to achieve the movement synchronization on both ends of the portal frame using the synchronous control strategy. That ensures the movement accuracy for the CNC band saw equipment of the large Portal style and improves the cutting accuracy and efficiency of the equipment.

Simulation and Analysis on Main Synchronized Hydraulic Cylinder of Huge Hydraulic Press

2012 ◽  
Vol 233 ◽  
pp. 150-153
Author(s):  
Jin Yu ◽  
Ming Zhen Fan ◽  
Guo Qin Huang ◽  
Min Yu
Keyword(s):  
Closed Loop ◽  
Position Control ◽  
Response Speed ◽  
Hydraulic Cylinder ◽  
Hydraulic Press ◽  
Loop Control ◽  
Piston Cylinder ◽  
The Press ◽  
Hydraulic Cylinders ◽  
Position Control System

Nowadays, huge hydraulic press plays an important role in the heavy industry. The synchronized hydraulic cylinder is the key component, which will affect the performance of the press. Thus, a thorough investigation to the main cylinder is required. In this paper, a mathematical model was built for the position closed-loop control of active synchronous hydraulic cylinders, and transfer function of the corresponding single cylinder was deduced. Simulation and calibration of the working cylinder servo position control system was accomplished with MATLAB, so as to improve the response speed and stability of the single working cylinder system. The results showed that a single hydraulic piston cylinder had a better position control features, which offered a theory basis for the design of the main drivers of forging hydraulic machine synchronization system.

Direct-Drive Differential Volume Control Electro-Hydraulic Servo Control System

2013 ◽  
Vol 433-435 ◽  
pp. 991-994
Author(s):  
Zhu Xin Zhang ◽  
Tuo Jia
Keyword(s):  
Control System ◽  
Dynamic Performance ◽  
Hydraulic Cylinder ◽  
Servo Control ◽  
Volume Control ◽  
Direct Drive ◽  
Reciprocating Motion ◽  
Servo Control System ◽  
Hydraulic Servo ◽  
Motion Characteristics

Direct-drive volume control electro-hydraulic servo control system, derivation model of single-rod hydraulic cylinder system, pointed out that when the reciprocating motion characteristics are inconsistent. In order to solve this problem, proposed direct-drive differential volume control electro-hydraulic servo system design of its control system and analysis of system models. Through theoretical analysis, validate this proposed direct-drive bad dynamic volume control system, symmetric dynamic performance, improving control system reliability.

Dynamic Characteristics Research of Self-Swinging Control System with Valve-Controlled Cylinder Device for Liquamatic Fire Water Monitor

2010 ◽  
Vol 44-47 ◽  
pp. 1427-1431
Author(s):  
Guo Liang Hu ◽  
Zhi Gang Gao
Keyword(s):  
Control System ◽  
Simulation Analysis ◽  
Water Pressure ◽  
Water Channel ◽  
Hydraulic Cylinder ◽  
The Self ◽  
Controlled System ◽  
Pressure Water ◽  
Water Hydraulic ◽  
Hydraulic Valve

In order to satisfy the flexibility requirements of the fire fighting in some particular circumstances, a self-swinging control system with valve-controlled cylinder of the liquamatic fire water monitor was designed. The self-swinging control system was composed of water hydraulic cylinder, water hydraulic valve, water channel connection plate and mechanical feedback device. This controlled system was driven by the pressure water from the monitor body. The water hydraulic cylinder drives the monitor head to swing side by side, consequently, the cover areas of the jet water from the monitor head was increased. At the same time, the modeling and simulation analysis was carried out for the self-swinging control system using the AMESim software, the simulation results show that the self-swinging control system can self-swing in a particular frequency, and the frequency is increasing with the water pressure increasing.

Implementation of Precision Force Control for an Electro-Hydraulic Servo Press System

2012 ◽  
Vol 190-191 ◽  
pp. 806-809 ◽  
Author(s):  
Hong Ming Chen ◽  
Chun Sheng Shen ◽  
Ting En Lee
Keyword(s):  
Control System ◽  
Force Control ◽  
Force Sensor ◽  
Hydraulic Cylinder ◽  
Relief Valve ◽  
Servo Valve ◽  
Composite Control ◽  
Servo Press ◽  
Control Scheme ◽  
Hydraulic Servo

Based on the fuzzy method, a PC-based precision force control scheme is proposed for the electro-hydraulic servo press system. The main feature of proposed scheme is to develop a composite control of relief valve and flow servo valve. With the feedback of force sensor, the fuzzy-based control system is realized by LabVIEW for achieving the precision force control of hydraulic cylinder. In the experiments, a practical platform of hydraulic servo press system is used to demonstrate the effectiveness of proposed scheme. The testing results indicate the accurate output responses.

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