scholarly journals Introductory Mechatronics Course Created To Fulfill A Freshman Level Engineering Requirement

2020 ◽  
Author(s):  
Tammy Gammon
Keyword(s):  
Engineering Requirement

Study on Mathematical Model of High Speed Milling Force for Plastic Mold Steel 3Cr2Mo

2011 ◽  
Vol 291-294 ◽  
pp. 710-714
Author(s):  
Jun Min Xiao ◽  
Ying Xu
Keyword(s):  
Experimental Data ◽  
Mathematical Model ◽  
High Speed ◽  
High Hardness ◽  
Milling Force ◽  
High Speed Milling ◽  
Engineering Requirement ◽  
Practical Engineering ◽  
Cad Cam ◽  
Plastic Mold

Mold steel 3Cr2Mo has been used widely in manufacturing of plastic mold formed parts, owing to fine mechanical properties. However, it is also very difficult to cut mold formed parts of steel 3Cr2Mo due to high hardness. Ordinary NC cutting method of steel 3Cr2Mo is unable to relate to modern mold manufacturing due to bad cutting property, so it is extremely significant for improving cutting property of steel 3Cr2Mo to study the high speed milling technology. On the basis of improving the traditional cutting force formula, the mathematical model of high speed milling force for steel 3Cr2Mo was derived and solved by using the experimental data and constructing matrix equation based on MATLAB software. Comparing with experimental data, the error of mathematical model of high speed milling force could be controlled within 6 percent. Due to high precision the model of high speed milling force can meet practical engineering requirement and has great value in the fields of CAD/CAM/CAE.

Nanoemulsion with Controlled Rheology under Different Temperature for Effective Removal of Oil-based Drilling Fluid in Offshore Drilling

2021 ◽  
Author(s):  
Renzhou Meng ◽  
Chengwen Wang ◽  
Xiliang Dong ◽  
Chao Xiong
Keyword(s):  
High Temperature ◽  
Low Temperature ◽  
Rheological Properties ◽  
Drilling Fluid ◽  
Offshore Drilling ◽  
Emulsion Droplets ◽  
Effective Removal ◽  
Engineering Requirement ◽  
Important Means ◽  
The Stability

Abstract Oil-based drilling fluid (OBDF) is an important means for offshore drilling, but it would affect the cementing quality. Nanoemulsions shows potential for OBDF removal, but how to prepare nanoemulsion meeting the engineering requirement is lack of good understanding. Moreover, nanoemulsions usually behave badly under low/high temperature, which would restrict the application. Revealing removal mechanisms of nanoemulsion and improving nanoemulsion stability at different temperature are of great significance. The nanoemulsion could rapidly spread on the wellbore surfaces, cause the adhering OBDF to curl into little droplets, and solubilize the removed OBDF. The removal efficiency can reach more than 98%. Low temperature and higher concentration of dispersed phase both increased the viscosity of nanoemulsions stabilized by surfactants. PEGs can induce the bridging of emulsion droplets at low temperature, leading to significant increase of nanoemulsions viscoelasticity at low temperature (around 5°C). To control the rheological properties of nanoemulsions, a hydrophobic association polymer, HAAP, was proposed. Nanoemulsions containing HAAP does not gel at low temperature (< 15°C). And the viscoelasticity of nanoemulsions increased slightly when the temperature is higher than 70°C because of the thermoassociating behavior of polymer, which can ensure the stability of the nanoemulsions at high temperature. This paper is helpful to establish a generic route for preparing nanoemulsions with controlled rheological properties under different temperature, which is benefit for their applications in offshore.

Research on a Variable Degree of Freedom Luffing Mechanism, Part I

2013 ◽  
Vol 842 ◽  
pp. 433-438
Author(s):  
Xiao Guang Yao ◽  
Yong Bao Feng ◽  
Xiao Song Guo ◽  
Chang Lin Ma
Keyword(s):  
Degrees Of Freedom ◽  
Work Conditions ◽  
Degree Of Freedom ◽  
Dynamic Equations ◽  
Variable Degree ◽  
Analytic Model ◽  
Body System ◽  
Electric Control ◽  
Engineering Requirement ◽  
Relationship Of

According to the special engineering requirement, a novel luffing mechanism with variable degree of freedom is presented in this study. The mechanism is assumed to be an ideal rigid body system and the degrees of freedom in different work conditions are calculated. Then the kinematic equations of mechanism are obtained by the geometrical and motional relationship of the components; meanwhile, the dynamic equations of mechanism are deduced by the Newton's mechanical law. The analytic model can be employed for the calculation and analysis of the mechanism features; furthermore, it can be used for the design of hydraulic and electric control system.

Engineering Characteristics of Concrete Made of Desert Sand from Maowusu Sandy Land

2012 ◽  
Vol 174-177 ◽  
pp. 604-607 ◽  
Author(s):  
Bao Hong Jin ◽  
Jian Xia Song ◽  
Hai Feng Liu
Keyword(s):  
High Strength Concrete ◽  
Civil Engineering ◽  
High Strength ◽  
Fine Aggregate ◽  
Sandy Land ◽  
Strength Concrete ◽  
Engineering Characteristics ◽  
Desert Sand ◽  
Fine Grain ◽  
Engineering Requirement

The desert sand from Maowusu sandy land is very fine aggregate. Currently, there are no national specifications concerning the application of desert sand with very fine grain. To apply the desert sand to concrete in civil engineering, concrete specimens made of the desert sand had been tested in order to clarify its engineering characteristics. On the basis of determined chemical composition and physical characteristics of the desert sand, the mechanical properties of concrete made of fine aggregate from Maowusu sandy land were investigated. The results of the tests indicated that the desert sand could be used as a fine aggregate in concrete for general civil engineering. At the same time, the desert sand was used to confect high strength concrete, the strength and workability of which met general engineering requirement, which provided references for high strength concrete preparation in these regions

A New Calculation System for Straightening Force

2009 ◽  
Vol 628-629 ◽  
pp. 113-118
Author(s):  
Min Chen ◽  
X.M. Jiang ◽  
Zu Xin Zhao ◽  
X.B. Huang
Keyword(s):  
Beam Theory ◽  
Social Benefits ◽  
Mechanics Of Materials ◽  
Engineering Requirement ◽  
Calculation System

Based on the thorough analysis of the disadvantage of the traditional calculation system for straightening force, the new calculation system for straightening force is built according to the analysis of roller-shaped curve, flattening straightening and bend straightening with the application of mechanics of materials and bend beam theory. It is testified by practical use that the calculating accuracy of the new calculation system for straightening force satisfies the actual engineering requirement. New six-rollers straightening machines are designed and manufactured according to the new calculation system, which obtain notable economical and social benefits.

Design of a Self-Tunning Temperature Controller for a Coal Sample Burning Point Detecting Instrument

2011 ◽  
Vol 103 ◽  
pp. 354-360
Author(s):  
Xiao Yan Chen ◽  
Chao Yi Dong ◽  
Guang Zhi Dai
Keyword(s):  
Time Delay ◽  
Coal Sample ◽  
Physical Property ◽  
Recursive Least Squares ◽  
National Standard ◽  
Temperature Control System ◽  
Sample Heating ◽  
Engineering Requirement ◽  
Key Techniques ◽  
Point Detection

The burning point of coal sample is a crucial physical property of coal, and it is also a key technical parameter for the exploitation, transportation, and application of coal. The national standard for coal sample burning point detection prescribes a strict rising rate of temperature when coal samples being heated. To meet with this engineering requirement, we introduce a scheme of a coal sample burning point detecting instrument, which is based on an AT89C55 MCU. The characteristics, key techniques, and solutions of the temperature control system are introduced with respect to the instrument. We employ a self-tunning Dahlin controller with a Recursive Least Squares with Exponential Forgetting (RLSEF) algorithm to solve the control problems of this time-delay, big inertia, and time-variable plant (coal sample heating furnace). Simulations show that the self-tunning Dahlin controller is able to not only compensate the time-delay and big inertia of the plant and but also adapt to the variations of plant parameters, so that the requirement for the rising rate of temperature can be fulfilled effectively.

scholarly journals Development of a Universal Locomotive Frame Using System Engineering Methods

2020 ◽  
Author(s):  
I.N. Kabanov
Keyword(s):  
Life Cycle ◽  
Optimal Design ◽  
Production Process ◽  
Systems Engineering ◽  
Systematic Approach ◽  
System Engineering ◽  
Technological Preparation ◽  
Function Design ◽  
Cycle Systems ◽  
Engineering Requirement

The article presents the practice of using systems engineering methods in the development of a universal locomotive frame. The work is aimed at developing the optimal design of the locomotive frame, which will simplify the production process of the unit and save on design and technological preparation of production. The advantages of applying a systematic approach to working with requirements, identifying the required functions and forming the structural structure of the product are described. Keywords: locomotive, frame, life cycle, systems engineering, requirement, function, design.

System Based Code: Basic Structure

2002 ◽  
Author(s):  
Yasuhide Asada ◽  
Masanori Tashimo ◽  
Masahiro Ueta
Keyword(s):  
Performance Improvement ◽  
System Reliability ◽  
Cost Reduction ◽  
Basic Structure ◽  
Nuclear Industry ◽  
Theoretical Structure ◽  
Engineering Requirement ◽  
Reliability Performance ◽  
Theoretical Procedure

This paper introduces the basic theoretical structure of the “System Based Code” which has initially been proposed by the authors intending to give nuclear industry a leap of progress in the system reliability, performance improvement and cost reduction. The System Based Code intends to give a theoretical procedure to optimize the reliability of the system by administrating every related engineering requirement throughout the life of the system: from design to decommissioning.

A Color Error Correction Mode for Digital Camera

2010 ◽  
Vol 44-47 ◽  
pp. 3706-3710
Author(s):  
Han Kun Ye
Keyword(s):  
Color Space ◽  
Digital Camera ◽  
Color Management ◽  
Experimental Sample ◽  
Color Target ◽  
Polynomial Curve ◽  
Engineering Requirement ◽  
Color Error ◽  
Image Production ◽  
Color Conversion

Digital camera is the one of the main devices in the computer and multimedia technology and its color management model is the key to guarantee the color consistency in the succedent image production and transfers. The paper presents a color conversion model for digital camera based on polynomial curve generation. First, color rendering principle of digital camera is analyzed. Then digital camera data is pretreated to a unitary field to deduce final model. Third, standard color target is taken for experimental sample and substitutes color blocks in color shade district for complete color space to solve the difficulties of experimental color blocks selecting; Fourth, the model using polynomial curve generation algorithm to correct color error is deduced; Finally, the realization and experiment results show that, compared with some methods which have relatively high accuracy, the algorithm can improve color conversion accuracy and can satisfy the engineering requirement in digital camera color management

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