An Energy-Saving Way to Balance Variable Negative Load Based on Back-Stepping Control With Load Observer

2016 ◽  
Author(s):  
Jin Mengren ◽  
Wang Qingfeng
Keyword(s):  
Energy Saving ◽  
Hydraulic System ◽  
Control Algorithm ◽  
Chamber Pressure ◽  
Extra Energy ◽  
Power Machinery ◽  
Back Stepping Control ◽  
And Control ◽  
Balance Variable ◽  
Inlet Chamber

Traditionally, counterbalance valve (CBV) is widely used to counterbalance negative load of fluid power machinery. CBV introduces extra energy consumption and oscillation to hydraulic system especially for time varying system. The essence of its shortcoming is the inflexibility of the control architecture. In this article, a proportional orifice is adopted to counterbalance negative load, which makes the control strategy flexible. A load observer is proposed to demonstrate the load dynamically. A control algorithm based on back-stepping design is proposed in this paper afterwards, aiming at keeping the inlet chamber pressure of the actuator around a fairy small value. The control error is estimated, as well. A simulation for the process of the excavator booming down is carried out to verify the observer and control algorithm, which proves the energy-saving target achieved.

Load-Force-Adaptive Outlet Throttling: An Easily Commissionable Independent Metering Control Strategy

2016 ◽  
Author(s):  
Jan Lübbert ◽  
André Sitte ◽  
Benjamin Beck ◽  
Jürgen Weber
Keyword(s):  
Hydraulic System ◽  
Control Algorithm ◽  
Systematic Approach ◽  
Load Force ◽  
Chamber Pressure ◽  
The Novel ◽  
Test Rig ◽  
Mechanical Pressure ◽  
And Control ◽  
Inlet Chamber

This paper deals with a novel independent metering valve system which is intended to be used in medium sized mobile machines. The system uses a mechanical pressure compensator to enable a very simple SISO control algorithm which does not need any feedback parameters to be adjusted. The algorithm is capable of handling resistive and pulling loads at a certain desired velocity and inlet chamber pressure level. The paper gives a brief summary of the systematic approach to deriving the valves structure and compares different control approaches for the complete hydraulic system comprising several actuators. Special emphasis is given to the preferred solution, which is verified on a laboratory test rig consisting of reasonably priced mobile machine components. Furthermore a linear model of system and control structure is constructed to give detailed information regarding the dynamic characteristics of the controlled drive. The energetic benefits of the novel system architecture in comparison to a standard coupled metering flow sharing system are investigated by means of a levelling movement performed on the test rig and a simulated synthetic high power digging cycle.

The Hydraulic System Improvement of Copper Ingot Hot Rolling Equipment Based on Energy-Saving

2013 ◽  
Vol 364 ◽  
pp. 33-36
Author(s):  
Jian Jun Wang ◽  
Su Lan Hao ◽  
Lu Pan
Keyword(s):  
Energy Loss ◽  
Energy Saving ◽  
Hot Rolling ◽  
Hydraulic System ◽  
Power Efficient ◽  
System Improvement ◽  
Hot Rolled ◽  
And Control ◽  
System Power ◽  
Copper Ingot

In the design of hydraulic system, it is not only satisfied the transmission and control, but also needed to consider how to use the system power efficient and reliable. For a workshop of hot-rolled copper ingot production line hydraulic system, through the analysis of energy loss of hydraulic system, improved the hydraulic system of equipment for the purpose of energy-saving, and solved the problem in the process of transformation, achieved the purpose of energy-saving. These can provide reference for the energy-saving design and improvement of hydraulic system.

Control Strategy of Energy Saving Based on Intelligence-Fusion in Water Supply Engineering

2013 ◽  
Vol 401-403 ◽  
pp. 1822-1825
Author(s):  
De Qi Ren
Keyword(s):  
Water Supply ◽  
Energy Saving ◽  
Control Strategy ◽  
Comparative Research ◽  
Control Algorithm ◽  
Control Method ◽  
Pressure Control ◽  
Pressure Control System ◽  
And Control ◽  
Better Than

Aimed at the puzzle that it is heavy in energy consumption and not better in water quality to water supply engineering resulted in inappropriate control strategy, the paper explored the energy saving strategy and control mechanism of water supply system. In the paper, it discussed the cybernetics characteristic of water supply process, proposed the intelligence-fusion based control strategy and the energy saving executing strategy, and analyzed the control model of water supply purifying process and the control algorithm of constant pressure control system. The comparative research of simulation demonstrated that the proposed strategy would be better than conventional PID control method. The simulation results show that the strategy combined intelligence-fusion based control with speed control by inverter has better application prospect.

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.

A Study of Simulation of Hydropreumatic Suspension Experiment Rig Based on AMESim and Matlab/Simulink

2014 ◽  
Vol 599-601 ◽  
pp. 207-211
Author(s):  
Zhi Qiang Chao ◽  
Chu Ming Ning ◽  
Hua Ying Li
Keyword(s):  
Pid Control ◽  
Hydraulic System ◽  
Control Algorithm ◽  
Scientific Basis ◽  
Servo Control ◽  
Fuzzy Pid Control ◽  
Servo Control System ◽  
Hydraulic Servo ◽  
Excellent Control ◽  
And Control

By analyzing the mechanical and control module of electro-hydraulic servo control system of hydropreumatic suspension experiment rig, and finding the corresponding mathematical model, and constructing a controller with fuzzy PID control algorithm, and then using AMESim with the accurate modeling of the hydraulic system and Simulink with powerful data analysis and processing functions for system to simulate to verify the experiment rig excellent control performance, which can effectively provide a scientific basis for the optimization of vehicle safety and comfort.

Hydraulic Transmission and Control Technology Based on Energy-Saving

2013 ◽  
Vol 441 ◽  
pp. 845-849 ◽  
Author(s):  
Zhu Xin Zhang ◽  
Li Liang
Keyword(s):  
Energy Conservation ◽  
Energy Saving ◽  
Hydraulic System ◽  
Development Trend ◽  
Control Technology ◽  
High Efficient ◽  
And Control ◽  
Development Course ◽  
The Development Trend

Analyze the development course of hydraulic transmission and control technology from the perspective of energy conservation. Introduce several kinds of hydraulic components and hydraulic system of the application of energy conservation, the development trend of energy saving of hydraulic system is expounded. Provide some reference for reasonable design and high efficient application of hydraulic system.

Control System of Low Carbon and Energy-Saving Radiant Heating

2013 ◽  
Vol 385-386 ◽  
pp. 795-798
Author(s):  
Jin Hua Ding ◽  
Yu Jun Hu ◽  
De Quan Wang ◽  
Teng Gao ◽  
Ji Tian ◽  
...  
Keyword(s):  
Energy Saving ◽  
Control Algorithm ◽  
Heating System ◽  
Radiant Heating ◽  
Low Carbon ◽  
Radiation Heating ◽  
Large Space ◽  
Convection Heating ◽  
Control Principle ◽  
And Control

According to the characteristics of large space building's heating, the effect in energy saving and environmental protection is analyzed on Radiant heating and Convection heating. Then Radiant heating consists of burners, radiation pipe, reflection plate, vacuum blowers and exhausted pipe. Based on the requirement of the radiation heating system, the radiant heating controller is studied and developed with C8051F340 MCU. The control principle, control hardware, control algorithm and control software process are described. Implementation of HMI is on the touch screen by industrial series RS232 interface.

Residual Gas Reaction in the Electron Microscope: II The Design of a Gas-Control Chamber for Quantitative Observations

1969 ◽  
Vol 27 ◽  
pp. 82-83
Author(s):  
Chester J. Calbick ◽  
Richard E. Hartman
Keyword(s):  
Electron Beam ◽  
Electron Microscope ◽  
Local Environment ◽  
Chamber Pressure ◽  
Objective Lens ◽  
Ion Pump ◽  
Quantitative Studies ◽  
Precise Knowledge ◽  
Differential Pumping ◽  
And Control

Quantitative studies of the phenomenon associated with reactions induced by the electron beam between specimens and gases present in the electron microscope require precise knowledge and control of the local environment experienced by the portion of the specimen in the electron beam. Because of outgassing phenomena, the environment at the irradiated portion of the specimen is very different from that in any place where gas pressures and compositions can be measured. We have found that differential pumping of the specimen chamber by a 4" Orb-Ion pump, following roughing by a zeolite sorption pump, can produce a specimen-chamber pressure 100- to 1000-fold less than that in the region below the objective lens.

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