scholarly journals Hydraulic synchronizing lifting steel template based on AMEsim modeling simulation technology research

2021 ◽  
Vol 2087 (1) ◽  
pp. 012072
Author(s):  
Dongbei Li ◽  
Shenghui Wang ◽  
Xing Jin
Keyword(s):  
Difficult Problem ◽  
Heavy Load ◽  
Shunt Valve ◽  
High Rise ◽  
Modeling Simulation ◽  
Hydraulic Cylinders ◽  
Main Components ◽  
Concrete Casting ◽  
Lifting System ◽  
Synchronization Scheme

Abstract Steel formwork is used for concrete casting and forming, and plays a key role in the construction of high-rise buildings with asymmetrical large loads. In order to make the inner and outer formwork can be lifted synchronously, the difficult problem of unbalanced inner and outer formwork must also be overcome. According to the synchronization principle of the hydraulic lifting system and the performance parameters of its main components, AMESim model was created and the simulation was done for two hydraulic cylinders bearing the same heavy load and different weight load respectively. Therefore, the synchronization scheme of shunt valve is proposed.

ANALISA PENENTUAN SILINDER HIDROLIK PADA KONDISI OPTIMUM PINTU PENGURAS KOLAM PASIR PLTA BATANG AGAM

2021 ◽  
Vol 4 (2) ◽  
pp. 413-418
Author(s):  
Riza Muharni ◽  
Dytchia Septi Kesuma ◽  
Femi Earnestly
Keyword(s):  
Sea Level ◽  
Cylindrical Tube ◽  
Hydroelectric Power Plant ◽  
Hydraulic Cylinder ◽  
Hydroelectric Power ◽  
Optimum Load ◽  
Final Project ◽  
Hydraulic Cylinders ◽  
Hoisting System ◽  
Lifting System

The Batang Agam Hydroelectric Power Plant is a run of river type plant that has water purification stages before being used to turn a turbine generator. One of them is a sand pool that functions to deposit sand, mud and impurities carried by river water, where the drainage condition is currently experiencing some damage so it needs to be developed in the hoisting system of the fixed valve drain using a hydraulic lifting system and this requires initial analysis in the form of fixed valve loading at optimum conditions which then becomes the basis for determining the hydraulic cylinder.The research methodology in this writing includes field observations accompanied by a literature review. With the data obtained, we then analyze the optimum load on the Batang Agam hydropower fixed valve drain to be a reference in planning hydraulic cylinders as a hoisting system for the Sand pool fixed valve drain.From this final project, it can be concluded that the optimum load of the Batang Agam fixed valve drain at an elevation of 684.5 meters above sea level of 10472.95 kg equivalent to 10 tons is a conditional situation in the rainy season, and a medium load at an elevation of 683.7 meters above sea level of 9039.04 kg equivalent to 9 tons, Based on the calculation of hydraulic cylinder power at the optimum load obtained Ø cylindrical tube 360 mm, medium load obtained Ø cylindrical tube 320 mm.

scholarly journals DEVELOPMENT OF A DECISION SUPPORT SYSTEM FOR SOLVING CONTAINER LOADING PROBLEMS

Transport ◽  
2010 ◽  
Vol 25 (2) ◽  
pp. 138-147 ◽  
Author(s):  
Türkay Dereli ◽  
Gülesin Sena Daş
Keyword(s):  
Support System ◽  
Computational Algorithm ◽  
Real Life ◽  
Difficult Problem ◽  
Bees Algorithm ◽  
Container Transportation ◽  
Container Loading ◽  
Main Components ◽  
Fuel Costs ◽  
Critical Process

The globalization of supply chains and rising fuel costs are forcing container carriers both to minimize the number of trips and to maximize available container space. This makes container loading (CL) a critical process especially in real‐life applications. Container loading (CL), which is a difficult problem to be solved, has many applications in container transportation and distribution industries. This article presents a container loading support system (CLSS). The proposed CLSS composes of three main components, including a hybrid Bees Algorithm as the main computational algorithm, the graphical user interface (GUI) and a simulation program. The aim of the designed system is to make the packing pattern more visible to the user in order to simplify the loading process. An illustrative example ‐a CL problem from literature ‐ is also provided to introduce the operation of the system and to prove its efficiency.

Dual Hydraulic Cylinders Synchronized Control Strategy

2014 ◽  
Vol 898 ◽  
pp. 546-549
Author(s):  
Li Ping Liu
Keyword(s):  
Control Strategy ◽  
Pid Control ◽  
Single Neuron ◽  
Control Method ◽  
Synchronization Control ◽  
Depth Study ◽  
Hydraulic Cylinders ◽  
Single Neuron Pid ◽  
Lifting System ◽  
Synchronization Accuracy

Through the double cylinder synchronous lifting system in-depth study presents a master-slave control method and the single neuron PID control strategy for controlling synchronization accuracy. Simulation results show that this method can achieve higher precision synchronization control.

Study on Rotary Characteristics about Light Type Hydraulic Excavator

2011 ◽  
Vol 228-229 ◽  
pp. 1100-1106 ◽  
Author(s):  
Jing Yang ◽  
Long Quan ◽  
Yang Yang
Keyword(s):  
Hydraulic System ◽  
Operating Mode ◽  
Pressure Variation ◽  
Hydraulic Excavator ◽  
Heavy Load ◽  
Moments Of Inertia ◽  
System Pressure ◽  
Design Software ◽  
Main Components ◽  
D Model

In order to analyze rotary characteristics of light type hydraulic excavator, according to prototype’s real parameters, a 3-D model of excavator was built using Pro / E design software, and import into the software ADAMS to build the virtual excavator, while using the AMEsim software to build the main components of multi-way valve characteristics model, etc.. After the simulation model of hydraulic system was developed, rotary characteristics were simulated and researched through experiments with different moments of inertia which change in the heavy-load operating mode. On the basis of the analysis and comparison with the results of simulation and experiments, the law between hydraulic system pressure variation and energy consumption about light type hydraulic excavator was obtained with different moments of inertia when excavator rotating.

scholarly journals Design and Advanced Control of Intelligent Large-Scale Hydraulic Synchronization Lifting Systems

2019 ◽  
Vol 2019 ◽  
pp. 1-10
Author(s):  
Lijing Dong ◽  
Mingfu Qiu ◽  
Sing Kiong Nguang
Keyword(s):  
Control Strategy ◽  
Large Scale ◽  
Time Interval ◽  
Long Distance ◽  
Distributed Controller ◽  
Communication Time ◽  
Advanced Control ◽  
Hydraulic Cylinders ◽  
Lifting System ◽  
Synchronization Performance

Lifting systems are in great demand since more and more massive buildings or bridges tend to be shifted or lifted integrally. Hydraulic cylinders in traditional lifting systems are usually supplied by a common pump with an oil tank, which brings long distance hydraulic pipes and signal lines. This paper designs a new architecture of an intelligent lifting system, with self-contained hydraulic power supply system, wireless communication modules, and distributed controller. Based on the designed architecture of the intelligent lifting system, an advanced iterative learning control strategy is proposed to enhance its synchronization performance. With the proposed advanced control strategy, synchronization is achieved in a finite time interval even under the effect of communication time delays and saturations. The distributed controller of a lifting subsystem only uses the delayed information received from subsystems around. This is distinguished from traditional lifting systems, in which all of the lifting subsystems are normally controlled in a centralized way.

Design of Auto Lifting Control System Based on PLC

2014 ◽  
Vol 548-549 ◽  
pp. 1003-1006
Author(s):  
Fu Zhen Qin ◽  
Hai Yan Song ◽  
Xiao Ling Liu ◽  
Hai Chun Niu
Keyword(s):  
Control System ◽  
System Design ◽  
Control System Design ◽  
Mechanical Working ◽  
High Rise ◽  
The Core ◽  
Inspection And Maintenance ◽  
Lifting System ◽  
Working Efficiency ◽  
Working Method

Lifting system is widely applied to different range because it is quite convenient and intelligent, such as high-rise buildings. In order to improve the reliability and equipment working efficiency of the automatic control system, programmable controller (PLC) as the core controller is properly used during the control system design in the paper. Through the mechanical working method, the software control is used instead of more complex relay-contactor control which can greatly improve the mechanical failure inspection and maintenance convenience.

Research on the Ideal Cushion Method of Pneumatic Cylinder

2015 ◽  
Vol 779 ◽  
pp. 68-73 ◽  
Author(s):  
Hai Tao Wang ◽  
Long Wu Xu ◽  
Wei Xiong ◽  
Tian Ze Zhang
Keyword(s):  
Flow Rate ◽  
Theoretical Basis ◽  
High Speed ◽  
Characteristic Curve ◽  
Pneumatic Cylinder ◽  
Heavy Load ◽  
Hydraulic Cylinders ◽  
Pneumatic Cylinders ◽  
Temperature Equation ◽  
The Ideal

In the situation of high-speed or heavy load, pneumatic cylinders usually generate cushion failure like collision or rebound, so that the key question to be solved for the cylinders is cushion. In order to obtain a better cushion method, the paper used the ideal cushion characteristic curve of hydraulic cylinders for reference; and throttling area equation, temperature equation, flow rate equation and motion equation were established. By building the simulation module in Matlab/Simulink, the rule of throttling area approaching to the ideal cushion curve was found, which provide theoretical basis for the design of cylinders cushion devices.

Calculation & Analysis on Integral Mound-Lifting System of Shear Wall Construction in High-Rise Building

2012 ◽  
Vol 166-169 ◽  
pp. 770-775
Author(s):  
Fan Wang ◽  
Yun Sheng Zeng
Keyword(s):  
Outer Tube ◽  
Concrete Core ◽  
Core Tube ◽  
High Rise ◽  
Design Idea ◽  
Wall Construction ◽  
Cfst Columns ◽  
Lifting System ◽  
Calculation Analysis ◽  
Tube Structure

Kingkey building in Shenzhen is a kind of tube in tube structure which consists of outer tube and reinforced concrete core tube. The outer tube is composed of CFST columns. The article introduces the design idea and theory of the whole mould-lifting system during the work progress and analyses the security and global stability of steel platform and support columns in the system during the different construction stages, which is combined with the structure of the core tube and the construction characteristics.

Structural analysis of the photosynthetic membrane from Ectothiorhodospira halochloris

1983 ◽  
Vol 41 ◽  
pp. 740-741
Author(s):  
H. Engelhardt ◽  
R. Guckenberger ◽  
W. Baumeister
Keyword(s):  
Lattice Structure ◽  
Bacterial Species ◽  
Hexagonal Lattice ◽  
Reaction Centre ◽  
Photosynthetic Membrane ◽  
Rhodopseudomonas Viridis ◽  
Photosynthetic Membranes ◽  
Ectothiorhodospira Halochloris ◽  
Main Components

Bacterial photosynthetic membranes contain, apart from lipids and electron transport components, reaction centre (RC) and light harvesting (LH) polypeptides as the main components. The RC-LH complexes in Rhodopseudomonas viridis membranes are known since quite seme time to form a hexagonal lattice structure in vivo; hence this membrane attracted the particular attention of electron microscopists. Contrary to previous claims in the literature we found, however, that 2-D periodically organized photosynthetic membranes are not a unique feature of Rhodopseudomonas viridis. At least five bacterial species, all bacteriophyll b - containing, possess membranes with the RC-LH complexes regularly arrayed. All these membranes appear to have a similar lattice structure and fine-morphology. The lattice spacings of the Ectothiorhodospira haloohloris, Ectothiorhodospira abdelmalekii and Rhodopseudomonas viridis membranes are close to 13 nm, those of Thiocapsa pfennigii and Rhodopseudomonas sulfoviridis are slightly smaller (∼12.5 nm).

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