Experiment Study on Performances of Servo Pump Used in Hydraulic Press Machine

2012 ◽  
Vol 516-517 ◽  
pp. 892-895 ◽  
Author(s):  
Jun Gao ◽  
Guo Yi Yan ◽  
Gen Yun Peng ◽  
Guan Nan Xi
Keyword(s):  
Energy Efficiency ◽  
Control System ◽  
Working Conditions ◽  
Hydraulic System ◽  
Test Bench ◽  
Hydraulic Press ◽  
Experiment Study ◽  
Two Systems ◽  
Positive Meaning ◽  
Valve Control

As we known, the energy efficiency of pump-control system is higher than valve-control system. So, using pump-control system to replace valve-control system has a positive meaning to improve the energy efficiency in hydraulic press machine. In order to research the performance of servo pump used in hydraulic press machines, the present study is conducted. First, a test bench for comparison of pump-control and valve-control system is established. In this test bench, the pump of former valve-control system and the servo pump are settled. These two pumps are switched by solenoid to supply oil for the hydraulic system. Then, host PC, target PC, I/O board and other hard-wares are connected. Soft-wares and the corresponding driver board are applied to collect data. In order to test the performances of the pressure, velocity and displacement under the condition of the valve-control system and pump-control system, the two systems are tested with the same working conditions. The performance of repeatability and energy efficiency are also obtained. The results show that it’s feasible to apply servo pump to hydraulic press machine. And under the pump-control condition, the velocity and pressure performance of press machine is more stable.

Research of New Servo-Hydraulic Press Based on the AC Servo Motor Control

2012 ◽  
Vol 522 ◽  
pp. 542-545 ◽  
Author(s):  
Lian Xia ◽  
Yang Xiao ◽  
Gui Shan Li ◽  
Hua Zhai ◽  
Jiang Han
Keyword(s):  
Motor Control ◽  
Control System ◽  
Hydraulic System ◽  
Hydraulic Press ◽  
Servo Motor ◽  
Electrical Control ◽  
Ac Servo ◽  
Hardware Component ◽  
Ac Servo Motor ◽  
Valve Control

Servo-hydraulic press is a kind of hydraulic press which has feedback device and can detect and feedback signals. Nowadays traditional servo-hydraulic press based on proportion-al servo valve control has been often used,but the study of this article is a new servo-hydraulic press based on the AC servo motor control. In this article, the hydraulic system of new servo-hydraulic press,and the electrical control system including the hardware component and software system have been mainly designed.

Design and Analysis of the Low-Speed Hydraulic Control System of 3.15MN Forging Press

2013 ◽  
Vol 690-693 ◽  
pp. 2210-2217
Author(s):  
Yi Bo Li ◽  
Ming Hui Huang ◽  
Qing Pan ◽  
Min Chen
Keyword(s):  
Control System ◽  
Hydraulic System ◽  
Hydraulic Press ◽  
System Structure ◽  
Hydraulic Control ◽  
Low Speed ◽  
Hydraulic Theory ◽  
Forging Press ◽  
The Mathematical Model ◽  
Hydraulic Control System

A low speed hydraulic control system applying to 3.15MN forging press isdesigned for isothermal forging processes. Based on the hydraulic theory andthe system structure, both the mathematical model and the simulation model ofthe hydraulic press are established with its features discussed. PID controlmethod is adopted and genetic algorithm is used to automatically tune theparameters of the controller to deal with nonlinearity and time-variant of thecontrolled plant. Co-simulation of the control system and hydraulic system isestablished to verify the feasibility of the design. It is proved by anisothermal forging of a turbine disc that the system has good performances andcan achieve an ultra speed control in the end.

Research on Angle Measurement of Loader's Steering-by-Wire System

2013 ◽  
Vol 373-375 ◽  
pp. 138-141
Author(s):  
Hai Xia Zhao ◽  
Zhi En Lv
Keyword(s):  
Control System ◽  
Automatic Control ◽  
Working Conditions ◽  
Hydraulic System ◽  
Steering System ◽  
Angle Measurement ◽  
Corner Detection ◽  
Steering Wheel ◽  
Steer By Wire ◽  
Wire System

The loader's steer-by-wire system combines the automatic control system and hydraulic system. The system cancels the mechanical or hydraulic connection between the steering wheel and the front wheels, which existed in the original steering system, optimizing the adaptation of the loaders steering systems road feeling to its working conditions, convenient for the integration with other systems, and harmonization of control. This paper puts forward a new measurement of a steer-by-wire system steering angel. It aims at more accurate corner detection, will design to optimize loader's steer-by-wire hydraulic system signal detection, and better meet the actual needs.

Analysis on Composite Action Control Strategy of Separate Meter-In Separate Meter-Out Control System

2014 ◽  
Vol 721 ◽  
pp. 342-348
Author(s):  
Wan Rong Wu ◽  
Jian Chao Yao
Keyword(s):  
Control System ◽  
Simulation Model ◽  
Working Conditions ◽  
Control Strategy ◽  
Hydraulic System ◽  
System Model ◽  
Transmission Model ◽  
Composite Action ◽  
Composite Control ◽  
Actuator System

Based on the shortcomings of traditional multi actuator composite action on its coordination and load adaptability, this paper has put forward a hydraulic system model where separate meter-in separate meter-out controls the multi actuator, according to different action working conditions of actuator, it has provided a composite control strategy based on pressure flow, and through AMEsim and MATLAB, it has established the composite action hydraulic transmission model of double-actuator system and simulation model of control system, and then conducted co-simulation to verify the designed controller’s good coordination and load adaptability to the separate meter-in and separate meter-out control system under different composite action working conditions.

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.

Energy Saving in Electro-Hydraulic System Using Adaptive Neuro-Fuzzy Controller

2013 ◽  
Vol 278-280 ◽  
pp. 1451-1458
Author(s):  
Kwanchai Sinthipsomboon ◽  
Issaree Hunsacharoonroj ◽  
Joseph Khedari ◽  
Po Ngaen Watcharin
Keyword(s):  
Energy Efficiency ◽  
Energy Consumption ◽  
Energy Saving ◽  
Hydraulic System ◽  
Power Flow ◽  
Fuzzy Controller ◽  
Nonlinear Effects ◽  
Experiment Study ◽  
Neuro Fuzzy ◽  
Potential Improvement

In industrial machinery units in which handle with high loads, hydraulic actuators are often used to actuate the manipulators. The nonlinear effects of the hydraulic system can be a problem if they disturb the energy efficiency of the hydraulic system. In this study, a designed Adaptive neuro-fuzzy Controller for electro-hydraulic system is developed to reduce the energy consumption. An intelligent neuro-fuzzy controller is employed to optimize the quantitative energy of fluid power flow of hydraulic system by the rotation of the electric motor via an inverter. Results of experiment study are presented showing the potential improvement in term of energy saving and pressure servo performance offered by this method.

Experimental Study on Energy Efficiency of Two-Cylinder Direct Driven Hydraulic System in a Large-Scale Test Bench

2021 ◽  
Author(s):  
Robert Hermansson ◽  
Ville Närvänen ◽  
Jyrki Kajaste ◽  
Olof Calonius ◽  
Matti Pietola ◽  
...  
Keyword(s):  
Energy Efficiency ◽  
Electric Motor ◽  
Hydraulic System ◽  
Large Scale ◽  
Test Bench ◽  
Position Control ◽  
Input Power ◽  
Total Efficiency ◽  
Servo Motor ◽  
High Dependency

Abstract In this research the energy efficiency of a pump controlled direct driven hydraulic (DDH) system is experimentally tested and analyzed. The test bench uses two cylinders’ cross-connection to rotate the middle joint of the 5-meter-long pivot arm which is loaded with unequal load of maximum 1685 kg. Originally the test bench is designed to study the application of DDH in the case of an articulated steering system, but in this research the system is treated as load lifting and load lowering application. The power pack of the test bench features a permanent magnet servo motor and a bent-axis, fixed-displacement hydraulic motor-pump unit. A separate charge pump circuit is attached, which also controls the servo motor and pump case temperature and takes care of fluid heat management as well as filtering. An extensive CAN-network is utilized for measurement and control. The motion of the test bench is driven with position control to give reproducible lifting and lowering cycles with different loads and velocities. Three motion cycles are executed involving three different loads, nine combinations in total, to study their effect on energy efficiency in load lifting and load lowering situations. Mechanical input power is measured between the electric motor and pump, hydraulic power is measured at the pump outlet and at the cylinder ports, and finally the mechanical output power is calculated for the cylinder-to-mechanical interface. Energy losses are determined as well as the overall energy efficiency of the hydraulic system. The research focuses on the hydraulic system and therefore the electric input power to the system and the regenerated electric power in load lowering is left out of the study. However, the regeneration potential in load lowering part of the cycles is measured as the available electric motor shaft power. In load lifting, the total energy efficiency of the hydraulic system was at its best at 82% when using the maximum additional load of 1685 kg and the lowest lifting velocity of 0.1 rad/s. Energy efficiency of load lowering was at its best in the same cycle with 77% of the energy recovered from the pump-motor’s shaft. High dependency on load and velocity was detected, because the total efficiency in lifting decreased to 44% with highest velocity (0.3 rad/s) and lowest load (445 kg). In lowering, during the same cycle, the total efficiency was −17%, meaning that gravity loading alone could not produce fast enough motion and that active input power was needed. In conclusion, very good energy efficiency could be achieved when operating against high enough loading. Operating at partial loads and with higher velocities will clearly reduce energy efficiency, emphasizing the need for careful dimensioning of all the power train components.

scholarly journals Design of control system of Multifunctional Loading and Unloading Equipment

2021 ◽  
Vol 252 ◽  
pp. 02019
Author(s):  
Zhenfeng Zhao ◽  
Chuanyun Yi ◽  
Yuansheng Deng ◽  
Leilei Han
Keyword(s):  
Control System ◽  
Remote Control ◽  
System Design ◽  
Working Conditions ◽  
Hydraulic System ◽  
Terminal Control ◽  
Electrical System ◽  
Working Mechanism ◽  
Main Structure ◽  
Loading And Unloading

The main structure of the multifunctional loading and unloading machine is analyzed and designed, including feeding conveyor, intermediate conveyor and unloading conveyor. According to the action of each part of the hydraulic system and electrical system design, in order to meet the needs of more working conditions, the working mechanism realized the overall slip, telescopic conveyor lifting, rotating, telescopic; Combined with the convenience of worker operation, three control modes of remote control, workbench control and terminal control are designed.

ON COMPARATIVE ANALYSIS OF PERFORMANCE OPTIMIZATION METHODS OF MULTI-PUMP UNITS

2020 ◽  
pp. 23-28
Author(s):  
A.I. Glushchenko ◽  
M.Yu. Serov
Keyword(s):  
Energy Efficiency ◽  
Control System ◽  
Comparative Analysis ◽  
Performance Optimization ◽  
Optimization Methods ◽  
Online Optimization ◽  
New Approach ◽  
Advantages And Disadvantages ◽  
Analysis Of Performance

В статье рассматривается вопрос совершенствования системы управления параллельно-работающими насосными агрегатами с целью повышения энергоэффективности их работы. Проведено сравнение и выявление недостатков существующих методов решения рассматриваемой проблемы. Предложена идея нового подхода на базе онлайн оптимизации. The problem under consideration is improvement of the energy efficiency of a control system of parallel-running pump units. Known methods used to solve this problem are considered. Their advantages and disadvantages are shown. Finally, the idea of a new approach, which is based on online optimization, is proposed.

scholarly journals Parameterization, Modeling, and Validation in Real Conditions of an External Gear Pump

2021 ◽  
Vol 13 (6) ◽  
pp. 3089
Author(s):  
Miquel Torrent ◽  
Pedro Javier Gamez-Montero ◽  
Esteban Codina
Keyword(s):  
Working Conditions ◽  
Test Bench ◽  
Fluid Dynamic ◽  
Graph Model ◽  
Field Tests ◽  
Black Box ◽  
Gear Pump ◽  
Volumetric Behavior ◽  
External Gear Pump ◽  
Standard Tests

This article presents a methodology for predicting the fluid dynamic behavior of a gear pump over its operating range. Complete pump parameterization was carried out through standard tests, and these parameters were used to create a bond graph model to simulate the behavior of the unit. This model was experimentally validated under working conditions in field tests. To carry this out, the pump was used to drive the auxiliary movements of a drilling machine, and the experimental data were compared with a simulation of the volumetric behavior under the same conditions. This paper aims to describe a method for characterizing any hydrostatic pump as a “black box” model predicting its behavior in any operating condition. The novelty of this method is based on the correspondence between the variation of the parameters and the internal changes of the unit when working in real conditions, that is, outside a test bench.

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