The Dynamic Behavior of the Rotational Mechanism of One Transfer Manipulator with Electro-Hydraulic Acting

2014 ◽  
Vol 555 ◽  
pp. 267-272
Author(s):  
Corneliu Cristescu ◽  
Catalin Dumitrescu ◽  
Liliana Dumitrescu ◽  
Ioana Ilie
Keyword(s):  
Mathematical Modeling ◽  
Computer Simulation ◽  
Dynamic Behavior ◽  
Theoretical Research ◽  
Transfer System ◽  
The Real ◽  
Technological Processes ◽  
System A ◽  
Technological Module ◽  
Sensitive Behavior

The paper presents the results obtained following the theoretical research of one rotation mechanism, regarding the dynamic behavior for one modern transfer system, a manipulator or robot in cylindrical co-ordinates, which belongs to a molding technological module based on the hydraulic presses. Using the mathematical modeling and the computer simulation, we can know the dynamic behavior of the rotation mechanism. Analyzing the dynamic behavior, it can identify the parameters with sensitive behavior and, finally, it can optimize the dynamic regimes according to the real requests of driving, in order to satisfy the technological processes.

The Dynamic Behavior of the Elevation Movement Mechanism of One Transfer Manipulator with Electro-Hydraulic Acting

2012 ◽  
Vol 463-464 ◽  
pp. 1313-1316 ◽  
Author(s):  
Corneliu Cristescu ◽  
Petrin Drumea ◽  
Liliana Dumitrescu ◽  
Ioana Ilie ◽  
Constantin Chiriţă
Keyword(s):  
Mathematical Modeling ◽  
Computer Simulation ◽  
Dynamic Behavior ◽  
Theoretical Research ◽  
The Real ◽  
Movement Mechanism ◽  
Technological Module ◽  
Vertical Elevation ◽  
Sensitive Behavior

The paper presents the results following the theoretical research of one vertical elevation mechanism regarding the dynamic behavior for one modern transfer systems, a manipulator or robot in cylindrical co-ordinates, which belongs to a molding technological module based on the hydraulic presses. Using the mathematical modeling and the computer simulation, it can identify the parameters with sensitive behavior and, finally, it can optimize the dynamic regimes according to the real requests of driving.

The Dynamic Behavior of the Prehension Mechanism of One Transfer Manipulator with Electro-Hydraulic Acting

2013 ◽  
Vol 332 ◽  
pp. 165-170 ◽  
Author(s):  
Corneliu Cristescu ◽  
Catalin Dumitrescu ◽  
Liliana Dumitrescu ◽  
Ioana Ilie
Keyword(s):  
Mathematical Modeling ◽  
Computer Simulation ◽  
Dynamic Behavior ◽  
Theoretical Research ◽  
The Real ◽  
Technological Module ◽  
Sensitive Behavior

The paper presents the results following the theoretical research of one prehension mechanism regarding the dynamic behavior for one modern transfer systems, a manipulator or robot in cylindrical co-ordinates, which belongs to a molding technological module based on the hydraulic presses. Using the mathematical modeling and the computer simulation, it can identify the parameters with sensitive behavior and, finally, it can optimize the dynamic regimes according to the real requests of driving.

Research Regarding the Dynamic Behavior of Linear Hydraulic Servo-Systems

2013 ◽  
Vol 325-326 ◽  
pp. 480-485
Author(s):  
Petrin Drumea ◽  
Corneliu Cristescu ◽  
Catalin Dumitrescu ◽  
Iulian Dutu ◽  
Ioana Ilie
Keyword(s):  
Mathematical Modeling ◽  
Numerical Simulation ◽  
Dynamic Behavior ◽  
Theoretical Research ◽  
Scientific Interest ◽  
Servo Systems ◽  
Hydraulic Motors ◽  
Hydraulic Servo ◽  
Computer Numerical Simulation ◽  
Theoretical Results

The paper presents the theoretical results of extensive research on the dynamic behavior of linear hydraulic motors, carried out in INOE 2000-IHP, in the framework of the NUCLEU Programmer. The research has been conducted both theoretically and experimentally, but, in this paper, is presented only the theoretical research. Theoretical research has taken place with the modern means of mathematical modeling and computer numerical simulation. The article presents some theoretical interested results obtained in the research, results that are of real scientific interest, but, also, with practical value through their use in the design of fluid power components and equipments.

A Fundamental Study on the Reversal Behavior of an Automobile Wiper Blade

2009 ◽  
Author(s):  
Masato Mizokami ◽  
Tsuneo Akuto ◽  
Takayuki Fukuda ◽  
Dai Yanagisawa ◽  
Masatsugu Yoshizawa
Keyword(s):  
Thin Layer ◽  
Dynamic Behavior ◽  
Analytical Model ◽  
Glass Surface ◽  
Water Layer ◽  
Fundamental Study ◽  
Fluid Force ◽  
The Real ◽  
System A ◽  
Time Histories

Automobile wiper systems provide a clear sight for drivers by creating a very thin layer of water about few dozen nano meters on a windshield. Several studies have been carried out to investigate the dynamic behavior of the wiper systems. However, there are few studies focused on reversal behavior of the wiper blade. Observation was conducted and analytical model is developed from the observation of the real wiper system. A water layer is considered in the analytical model between the wiper blade and the glass surface. The bottom of the model is assumed to always contact the water layer so that the fluid force is always applied. The dimensionless equations, which govern the wiping motion including the reversal behavior, were derived. The equations are discussed neglecting the nonlinear terms to understand the approximate movement and effect of the parameters. Moreover, the equation is solved numerically to obtain the time histories of the wiper blade. As a result, the effect of the fluid force, which acts on the wiper blade on the reversal behavior of the wiper blade, became clear.

MODELING THE HYDRAULIC CHARACTERISTICS OF DRAIN VALVE AND BURST FITTING OF AN AIRCRAFT ACCIDENT-RESISTANT FUEL SYSTEM

2020 ◽  
Vol 7 (3) ◽  
pp. 37-44
Author(s):  
KONSTANTIN NAPREENKO ◽  
◽  
ROMAN SAVELEV ◽  
ALEKSEY TROFIMOV ◽  
ANNA LAMTYUGINA ◽  
...  
Keyword(s):  
Mathematical Modeling ◽  
Hydraulic Resistance ◽  
Hydraulic Calculation ◽  
Fuel System ◽  
Hydraulic Characteristics ◽  
System A ◽  
Ansys Cfx ◽  
Calculation Results ◽  
Scale Experiment ◽  
Aircraft Accident

The article discusses methods for determining the hydraulic resistance of units of an accident-resistant fuel system. A detailed description of the need to create such fuel systems for modern helicopters is given. The development of such systems today is impossible without the use of the method of mathematical modeling, which allows to qualitatively solve problems arising in the design process. To obtain accurate research results, it is necessary to have a complete description of all elements and assemblies of the system. Methods for determining the hydraulic characteristics of AFS elements using the drag coefficient, reference literature and CFD codes are considered. As the investigated AFS units, a drain valve and burst fitting were studied in the article. A hydraulic calculation of these AFS elements ware performed, the simulation results are presented in the ANSYS CFX software package. Also as the calculation results of bursting fitting, the pressure distribution fields of full and static pressure, velocity and streamlines are also shown. An experimental setup for validating the results obtained using the mathematical modeling method is considered, as well as a methodology for conducting a full-scale experiment to determine the hydraulic resistance of the unit. Materials have been prepared for inclusion in a one-dimensional mathematical model of an accident-resistant fuel system.

МODERNIZATION TECHNOLOGY REPAIRING ACENTRIFUGAL WATER PUMP

2018 ◽  
pp. 48-51
Author(s):  
Sh.U. Yuldashev ◽  
D.T. Abdumuminova
Keyword(s):  
Production Process ◽  
Technological Process ◽  
Energy Efficient ◽  
Technical Support ◽  
Ultrasonic Processing ◽  
Water Pump ◽  
The Real ◽  
Technological Processes ◽  
Efficient Management ◽  
Pump Shaft

The article provides an overview of the principle of the pump D630-90, as well as methods for studying the real conditions of technical support to improve maintainability and optimize technological processes and systems. A technological process for the restoration of the shaft of a centrifugal water pump has been developed and an algorithm for managing it has been proposed, on the basis of which the system for energy-efficient management of the recovery area has been implemented. Also in the article some questions of use, metal-filled compound SK812, and also application of ultrasonic processing of a surface of a shaft of the centrifugal water pump of mark D630-90 are mentioned and considered. The developed technological process of pump shaft restoration showed that it is characterized by simplicity, it fits well into the production process of repair and can be widely used in repair shops.

scholarly journals A Tool for the Analysis and Characterization of School Mathematical Models

Mathematics ◽  
2021 ◽  
Vol 9 (13) ◽  
pp. 1569
Author(s):  
Jesús Montejo-Gámez ◽  
Elvira Fernández-Ahumada ◽  
Natividad Adamuz-Povedano
Keyword(s):  
Mathematical Modeling ◽  
Mathematical Models ◽  
Educational Research ◽  
Analysis Procedure ◽  
Real System ◽  
The Real ◽  
School Model ◽  
Corresponding Analysis ◽  
Three Components

This paper shows a tool for the analysis of written productions that allows for the characterization of the mathematical models that students develop when solving modeling tasks. For this purpose, different conceptualizations of mathematical models in education are discussed, paying special attention to the evidence that characterizes a school model. The discussion leads to the consideration of three components, which constitute the main categories of the proposed tool: the real system to be modeled, its mathematization and the representations used to express both. These categories and the corresponding analysis procedure are explained and illustrated through two working examples, which expose the value of the tool in establishing the foci of analysis when investigating school models, and thus, suggest modeling skills. The connection of this tool with other approaches to educational research on mathematical modeling is also discussed.

Call for Manuscripts for the 2015 Focus Issue: Mathematical Modeling

2013 ◽  
Vol 18 (9) ◽  
pp. 571
Keyword(s):  
Mathematical Modeling ◽  
Mathematical Models ◽  
Real World ◽  
The Real

This call for manuscripts is requesting articles that address how to use mathematical models to analyze, predict, and resolve issues arising in the real world.

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