Design of the Hydraulic System of Lead Plate Coiling Machine

2014 ◽  
Vol 937 ◽  
pp. 336-340
Author(s):  
Hui Sen ◽  
Rui Bo Yuan ◽  
Rong Li
Keyword(s):  
Control System ◽  
Hydraulic System ◽  
Position Control ◽  
Torque Control ◽  
Tension Control ◽  
Hydraulic Motor ◽  
Relief Valve ◽  
Lead Plate ◽  
Hydraulic Servo ◽  
Close Loop Control

This paper mainly introduces the process of lead electrolysis, the structure and working principle of lead plate coiling machine and Its’ parts, coiling machine components. First of all, rewind section hydraulic system adopts a return to the oil throttle speed control, it is stable and can bear a certain change load, can overcome the stage before the tension fluctuation of the impaction to the rotation speed of hydraulic motor. Secondly, speed and tension control system adopt electro-hydraulic servo valve and proportional relief valve are respectively to the drum speed and output torque control,it has high precision and accurate in speed and tension control. contact coiling section use electro hydraulic servo position control system with close loop control to improve the accuracy of position control. Finally, calculate parameters of each working section of hydraulic control system , verify the hydraulic component model and the rationality of the hydraulic circuit.

Study Control System Based on Creep Test in High Density Baler

2010 ◽  
Vol 139-141 ◽  
pp. 1624-1627
Author(s):  
Wei Lee ◽  
Chun Guang Wang
Keyword(s):  
Control System ◽  
Data Acquisition ◽  
Creep Test ◽  
Hydraulic System ◽  
Electrical Contact ◽  
Hydraulic Cylinder ◽  
High Density ◽  
Hydraulic Control ◽  
Creep Tests ◽  
Relief Valve

Hydraulic transmission system controls hydraulic cylinder forward and backward movement freely, in order to achieve high density hydraulic baler work circulation. Creep test required hydraulic system to output constant stress, and study creep tests can not be completed when used succeeding the electrical contact style in the past time. The system used programmable logic controller (PLC) to instead of succeeding the electrical contact style and realized freely forward and backward movement of hydraulic cylinder, electro-hydraulic proportional relief valve can adjust hydraulic system and make it stepless pressure regulation and then degree of automation and reliability in hydraulic control system to be improved. This paper introduces aspects: including the selection, hardware configuration and program of PLC, meanwhile, giving specific realization method. Through the control system to study creep test in hydraulic baler, adopting the National Instrument (NI) company's multi-channel data acquisition card, which type is USB-6251,applying Labview8.2 to write data acquisition program on my own, the versatility and flexibility of system was verified, which was able to complete creep test successfully.

Modeling and Simulation of Electro-Hydraulic Proportional Position Control System with the Flexible Hose

2012 ◽  
Vol 468-471 ◽  
pp. 2094-2099 ◽  
Author(s):  
Yong Tian ◽  
Bo Liu ◽  
Hong Wei Gao ◽  
Wei Qi Li
Keyword(s):  
Mathematical Modeling ◽  
Control System ◽  
Dynamic Simulation ◽  
Hydraulic System ◽  
Position Control ◽  
Flexible Hose ◽  
Proportional Control ◽  
Power Bond Graph ◽  
Position Control System ◽  
Hose Model

A method which utilizes the power bond graph to establish the flexible hose model is described in this work. By using this method, the paper establishes mathematical modeling for the location of electro-hydraulic proportional control system with the flexible hose. And then, this article completes dynamic simulation by MATLAB and analyses the results of simulation. The effect of the flexible hose parameters on dynamics characteristics of the hydraulic system is also studied.

scholarly journals Modelling & Position Control for Electro-Hydraulic System

2019 ◽  
Vol 8 (4) ◽  
pp. 3841-3845 ◽  
Keyword(s):  
Control System ◽  
Hydraulic System ◽  
Position Control ◽  
Industrial Applications ◽  
Hydraulic Systems ◽  
System A ◽  
Complex Process ◽  
Highly Nonlinear ◽  
Back Stepping Control ◽  
And Control

Electro-hydraulic systems (EHS) are widely used in industrial applications due to the high-power density and accuracy. However, EHS are highly nonlinear which makes its modelling and control aspects a complex process. In this paper, we present the modelling and position control for an electro-hydraulic system (EHS). The mathematical modelling is carried out considering the non-linearities like friction, discharge coefficient and load mass present in the system. A back-stepping control scheme is developed for maintaining the accuracy in the position control. The closed-loop stability of the proposed control system is analyzed with Lyapunov’s theory. The performance of the control system under the effect of bounded external uncertainties is validated with simulation study. The study indicates that the proposed controller gives an effective motion control in presence of the system uncertainties.

Development of Stand-Alone Type Hydraulic Actuator for Valve Remote Control System

2011 ◽  
Vol 145 ◽  
pp. 48-52
Author(s):  
Min Kyu Park ◽  
Seok Jo Go ◽  
Jang Sik Park ◽  
Moon Ho Choi ◽  
Chang Dong Kim ◽  
...  
Keyword(s):  
Control System ◽  
Remote Control ◽  
Power System ◽  
Hydraulic System ◽  
Check Valve ◽  
Gear Pump ◽  
Hydraulic Actuator ◽  
Relief Valve ◽  
Remote Control System ◽  
Ac Motor

In the case of hydraulic power system of ships or marine facilities, many kinds of mechanical, electrical, hydraulic components are connected to each other very complicatedly. It is very hard to disassemble or reconfigure the hydraulic system. Therefore there are increasing demands from industry for a stand-alone type actuator and a valve remote control system. Valve remote control system (VRCS) is a convenient system which it possible to operate the valves installed in the cargo or ballast tanks from the remote wheelhouse. This paper is dealing with a new stand-alone type hydraulic actuator for a valve remote control system. The stand-alone type hydraulic actuator consists of a gear pump, an AC motor, a check valve, a relief valve and a controller. We try to design and implement the stand-alone type hydraulic actuator and this tries to be verified through an experiment. This research is a contribution to simplify a hydraulic system, improve responsibility of dynamic power system, and reduce an energy loss in a ships or marine facilities.

scholarly journals Research on the Nonlinear Characteristic of Flow in the Electro-Hydraulic Servo Pump Control System

Processes ◽  
2021 ◽  
Vol 9 (5) ◽  
pp. 814
Author(s):  
Tiangui Zhang ◽  
Gexin Chen ◽  
Guishan Yan ◽  
Cheng Zhang ◽  
Yuan Li ◽  
...  
Keyword(s):  
Control System ◽  
Hydraulic System ◽  
Dead Zone ◽  
Servo Motor ◽  
Saturation Zone ◽  
Output Displacement ◽  
Positive Displacement ◽  
System Flow ◽  
Displacement Pump ◽  
Hydraulic Servo

In an electro-hydraulic servo system, the system flow is used as an intermediate variable to control the output displacement/force/speed of the actuator, and it plays the role of a medium for energy transmission and conversion. Therefore, the control of the system flow is the essence of state control for the system actuator. The purpose of this paper is to study the non-linear characteristics of pump control system flow and pave the way for high-performance control of the system. Based on the flow partition idea, the system output flow is divided into the dead zone, load zone, and saturation zone. We establish a mathematical model of the hydraulic system to analyze and study the effect of the nonlinear characteristics of the servo motor and the positive displacement pump on the system flow partition characteristics. We focus on the effects of the positive displacement pump shear flow internal leakage, pressure difference flow internal leakage, oil compression, servo motor rotation friction, and servo motor torque reserve rate on the system flow output, and analyze the partition characteristics of the system flow under different working conditions. We provide a theoretical basis for a high-precision control strategy for a hydraulic system.

scholarly journals Bricklaying Robot Lifting and Levelling System

2021 ◽  
Vol 23 (4) ◽  
pp. B257-B264
Author(s):  
Piotr Wos ◽  
Ryszard Dindorf ◽  
Jakub Takosoglu
Keyword(s):  
Mathematical Model ◽  
Control System ◽  
Design Process ◽  
Hydraulic System ◽  
Servo Drive ◽  
Synchronization Errors ◽  
Position Errors ◽  
Hydraulic Servo ◽  
The Mathematical Model ◽  
Servo Drive System

The article presents the concept of building and controlling a Bricklaying Robotic System (BRS). The research presents the design process and how to control a four-cylinder electro-hydraulic servo drive system. The article presents a mathematical model and optimizes the process of aligning the mobile support platform of the masonry robot. The lifting mechanism was presented and its kinematic analysis performed. The mathematical model of the hydraulic system was described. The control system, designed for the masonry robot lifting platform, includes position errors for a single drive axis and synchronization errors between the axes.

Study on Simulation of Ocean Wave Generation System Based on SIMULINK

2013 ◽  
Vol 300-301 ◽  
pp. 133-139
Author(s):  
Shi Ming Wang ◽  
Jing He
Keyword(s):  
Control System ◽  
Hydraulic System ◽  
Axial Flow ◽  
External Input ◽  
Ocean Wave ◽  
Hydraulic Motor ◽  
Generation System ◽  
The Stability ◽  
Conversion Equation ◽  
System Power

Designed a generation system by using ocean wave power for seabed-base detector. The system is mainly composed of an energy conversion device, hydraulic system, power generation system and automatic control system. This paper showed the composition of each subsystem, including the structure of axial flow turbine and the conversion equation of PID control system, hydraulic motor system. The simulation model is established by using SIMULINK block of MATLAB software, gave the results in two different conditions, one have the stability external input and the other don’t meanwhile the hydraulic system will turn to accumulator circuit. The simulation results show that this system can provide stable power output as the real system design reference.

The Effects of Orifice Sizes on a Hydraulic Servo Valve Control System

2013 ◽  
Author(s):  
Marshall McNea ◽  
Shanzhong (Shawn) Duan
Keyword(s):  
Control System ◽  
Hydraulic System ◽  
Pressure Pulse ◽  
Dynamical Behavior ◽  
Servo Valve ◽  
External Orifice ◽  
Hydraulic Servo ◽  
Hydraulic System Design ◽  
Valve Control ◽  
Orifice Size

Precision control for a force controlled hydraulic system can be achieved through the use of a flow controlled servo valve. Servo valves can be manufactured with a spool that is overlapped, an under lapped, or has a zero lap. A servo valve with a zero lap is desirable for a responsive hydraulic system without leakage, but has the disadvantage of creating a pressure pulse upon opening the valve. The hydraulic system for this setup involves having a double end, double action actuator that will have a cyclic motion generating multiple pressure waves in the system. Including an orifice in the system, which will function as a dampener, can reduce the pressure pulses. Traditional locations for orifices have been in the spool and on the actuator piston. For this hydraulic system design an external orifice will be introduced into the system via the use of an orifice plate included in the hydraulic fittings. This change allows for the ability to change the orifice size. Changing the orifice size to determine the effects on the systems control will be analyzed. The intended outcome is to demonstrate that different sized orifice plates will cause changes to the control system behavior so that an experimental formula will be established for this approach of a zero lap valve with an external damper for reduction of overshooting of dynamical behavior of the valve spool.

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