scholarly journals Optimization of technological factors of magneticelectric strengthening

2020 ◽  
Vol 65 (4) ◽  
pp. 404-412
Author(s):  
L. M. Akulovich ◽  
A. V. Miranovich ◽  
M. M. Dechko
Keyword(s):  
Magnetic Induction ◽  
Design Method ◽  
Technological Factor ◽  
Powder Coating ◽  
Optimality Criteria ◽  
Technological Factors ◽  
Control Factors ◽  
Limit Value ◽  
Optimal Values ◽  
Process Productivity

In order to determine the optimal values of technological factors for electromagnetic hardening process (EMHP), an experimental study of the process of applying ferromagnetic Fe – 2 % V powder coating on 30ХГС (GOST 4543- 71) steel parts was conducted. The process productivity and coating continuity were selected as the target parameters for the EMHP optimization. By applying the experimental design method, based on 5-factor central composite rotatable uniform plan, we have created stochastic models, expressed in regression functions of the second order. It has been determined that the magnetic induction value in the working gap is the most significant technological factor, affecting both target parameters. With the increasing induction magnitude the process productivity and the coating continuity increase non-linearly until the maximum limit value, which was attributed to the forming of current-conductive chains in the working gap, that have varying electrical conductivity and different directions relative to the lines of magnetic field forces. In order to determine the optimal EMHP mode we have solved the problems of finding maximums for greatest productivity and coating continuity within the constraints of the studied factor range. The discovered EMHP-modes, optimal for each separate parameter, coincide only in the value of the magnetic induction and the discharge density. The optimal values for the other control factors belong to different areas of factor range for different optimization parameters. To determine the EMHP modes, balanced against the both parameters, the problem of multicriteria optimization was solved. The obtained solution reveals that the density of discharge currents produces the biggest impact on the process productivity and the coating continuity within the balanced modes. At the same time the high continuity of the coating is achieved by the supplementing increase of peripheral speed of the processed workpiece, which leads to evener distribution of the intensively supplied mass of the ferromagnetic powder on the treated surface. The recommended technological modes of EMHP have been determined, based on the generalized optimality criteria.

MODEL OF SOCIAL POTENTIAL OF CHILDHOOD IN THE RUSSIAN REGIONS: THE RESULTS OF EXPERIMENTS

2019 ◽  
pp. 152-162
Author(s):  
A.G. Filipova ◽  
A.V. Vysotskaya
Keyword(s):  
Third Wave ◽  
Russian Regions ◽  
The Third ◽  
Control Factors ◽  
Social Potential ◽  
System Input ◽  
Optimal Values ◽  
Fixed Ideal ◽  
And Control ◽  
Selection Of

The article presents the results of mathematical experiments with the system «Social potential of childhood in the Russian regions». In the structure of system divided into three subsystems – the «Reproduction of children in the region», «Children’s health» and «Education of children», for each defined its target factor (output parameter). The groups of infrastructure factors (education, health, culture and sport, transport), socio-economic, territorial-settlement, demographic and en-vironmental factors are designated as the factors that control the system (input parameters). The aim of the study is to build a model îf «Social potential of childhood in the Russian regions», as well as to conduct experiments to find the optimal ratio of the values of target and control factors. Three waves of experiments were conducted. The first wave is related to the analysis of the dynam-ics of indicators for 6 years. The second – with the selection of optimal values of control factors at fixed ideal values of target factors. The third wave allowed us to calculate the values of the target factors based on the selected optimal values of the control factors of the previous wave.

scholarly journals THE STATIC OPTIMIZATION TASK OF OPTIMAL DESIGN OF NONLINEAR ELECTRONIC SCHEME

2019 ◽  
pp. 109-115
Author(s):  
Didmanidze Ibraim ◽  
Donadze Mikheil
Keyword(s):  
Optimal Design ◽  
Optimality Criteria ◽  
Pareto Optimal Solutions ◽  
Optimal Solutions ◽  
Design Task ◽  
Optimization Task ◽  
Minimum Capacity ◽  
Optimal Values ◽  
The Given ◽  
Selection Of

The article deals with such an important selection of the elements of electronic scheme of the given configuration, when the certain requirements of technical task are satisfied and at the same time the selected optimality criteria reach the extreme value. The gives task has been solved by the method of one-criterion optimization, in particular, the method of center gravity. To formalize the given scheme we have compiled a mathematical model of optimization, which considers the requirements of technical task. The optimal design task of the presented electronic scheme was brought to the task of multi criteria optimization. The computational experiments have been resulted in the Pareto-optimal solutions, from which there was selected a compromise on that corresponds to the minimum capacity, required by the scheme. According to the optimal values of resistors, we have conducted a computerized analysis of the transient process of the given electronic scheme with the help of a computer program Electronics Workbench.

scholarly journals Influence of sodium alginate on the formation of the structure of the products from chopped and minced meat

2021 ◽  
Vol 30 ◽  
pp. 01023
Author(s):  
Anna Vasyukova ◽  
Marina Kononenko ◽  
Alexander Moshkin ◽  
Maxim Vasyukov ◽  
Anatoly Kushnarenko ◽  
...  
Keyword(s):  
Moisture Content ◽  
Mathematical Models ◽  
Sodium Alginate ◽  
Design Method ◽  
Meat Products ◽  
Optimal Ratio ◽  
Optimal Values ◽  
Minced Meat ◽  
Natural Additive

The paper presents the results of using algae as a natural additive to chopped semi-finished meat products. The optimal ratio is set by means of the design method and the results of organoleptic assessment. The mathematical models that help to determine the optimal values of the factors and C, W and T (concentration of the components, moisture content and duration of mincing) are obtained.

scholarly journals Peningkatan Mutu Proses Pembuatan Cat Solvent dengan Metode Taguchi di PT JI

2018 ◽  
Vol 17 (1) ◽  
pp. 46
Author(s):  
Hery Hamdi Azwir ◽  
Mahfud Mufadhol
Keyword(s):  
Taguchi Method ◽  
Manufacturing Process ◽  
Process Capability ◽  
Powder Coating ◽  
Optimal Level ◽  
Average Percentage ◽  
Control Factors ◽  
Additional Process ◽  
Increase Productivity ◽  
First Time

In a manufacturing process, quality is not only seen from the final product, but also manufacturing process.  PT JI located in Cikarang is a company that produces paints and powder coating. Currently, the company has problems with 24.16% products that need rework or additional process. To increase productivity, PT JI applies the A3 project that is Right First Time (RFT). RFT is how to create a product with a one-time process and produce a product that has good quality on the first test. The average percentage of total RFT products in September 2016-January 2017 was 75.84%. This result is still below the company target of 80%. This study found the source of problems analyzed the manufacturing process using control chart, process capability, fishbone, and pareto. Taguchi method and ANOVA are applied to improve the design process. The application of the Taguchi Method shows that the factors which influence the value of viscosity quality are number of White Spirit, Number of Genekyd, Total Tio2 (kaolin), and mixing temperature, where each factor has an optimal level of 26.01%, 56.07%, 18.78% and 45oC. Then, it is found that all control factors have significant effect on viscosity value from ANOVA analysis. The application of this Taguchi method increases the process capability to Cp = 1.68 and Cpk = 1.43 from Cp = 0.29 and Cpk = 0.18, as well as an increase in RFT percentage of 5.78% or to 81.62% over the last two months.

Improvement Design of Adhesive Layer on Honeycomb Structure for Railway Vehicle System by Uniform Design Method

2020 ◽  
Vol 830 ◽  
pp. 53-58
Author(s):  
Yung Chang Cheng ◽  
Pongsathorn Pornteparak
Keyword(s):  
Design Method ◽  
Uniform Design ◽  
Equivalent Stress ◽  
Adhesive Layer ◽  
Honeycomb Structure ◽  
Von Mises Stress ◽  
Railway Vehicle ◽  
Original Design ◽  
Control Factors ◽  
Von Mises

The purpose of this paper focuses on adhesive layer strength while having a thermal cycling of honeycomb composite sandwich structure by using the uniform design of experiments method improving the von Mises stress of honeycomb structure. Three system parameters of the honeycomb structure are selected as the control factors to be improved. Uniform design of experiment is applied to create a set of simulation experiments. Applying ANSYS/Workbench software, the finite element modelling is investigated and the von Mises stress of the honeycomb structure is calculated under metal-honeycomb core flatwise tensile test. From the numerical results, the best honeycomb structure dimension of all the experiments which causes the smaller von Mises stress is selected as the improved version of design. Finally, the best model of the experiments which causes the minimum equivalent stress is regarded as the improved version of design. Compared with the original design, the result of ASTM C297 improved version is 17.386 MPa, which mean improved 36.28%, ASTM C364 improved version is 19.015 MPa, which mean improved 25.26%, ASTM C365 improved version is 16.86 MPa, which mean improved 12.35%.

Universal Design Considering Physical Characteristics of Diverse Users

2019 ◽  
Vol 13 (4) ◽  
pp. 517-525
Author(s):  
Masato Inoue ◽  
Wataru Suzuki ◽  
◽  
Keyword(s):  
Universal Design ◽  
Design Method ◽  
Physical Characteristics ◽  
Design Solution ◽  
User Requirements ◽  
User Characteristics ◽  
Control Factors ◽  
Design Variables ◽  
Noise Factors

To achieve a universal design that satisfies diverse user requirements associated with aging and internationalization, designers must make a decision based on diverse user requirements. Designers have generally incorporated average human physical characteristics in their designs. Thus, user limitations are critically important. Traditional design methods often regard engineering and product design as iterative processes based on point values. However, when user information is represented as a point value, the resulting product satisfies only that specific user group and does not necessarily satisfy diverse user groups. This study proposes a universal design method that obtains diversely ranged design solutions for user requirements. The proposed method defines diverse user requirements, design variables, and user characteristics as sets, which range in value. To represent user information accurately, users are classified into numerous groups using classification techniques. Design variables are divided into two types: control and noise. Control factors are designer-controllable variables that are based on design specifications. Noise factors are designer-uncontrollable variables representing user characteristics. To derive a ranged design solution set, designers clarify the relationship between performance and design variables. Ranged solutions satisfying required performance are derived for each group using all relational expressions and ranged variable values. The combinations of divided design variables that cannot satisfy the required performance are eliminated from the design proposal, and the narrowed range of design variables become ranged solutions. The ranged solutions are derived for each group, and the common range of design variables is the ranged solution for all users. This paper chooses the design problem of the strap height of a train as a case study of the proposed universal design method. In this case study, we consider diverse user requirements based on the variability of physical characteristics. This paper discusses the suitability of our proposed approach for obtaining ranged solutions that reflect the physical characteristics of diverse users.

Parameter Optimization of a Five-Axis Tool Grinder Using Grey Relational Analysis

2010 ◽  
Vol 458 ◽  
pp. 246-251 ◽  
Author(s):  
Jenn Yih Chen ◽  
Bean Yin Lee
Keyword(s):  
Grey Relational Analysis ◽  
End Mill ◽  
Relational Analysis ◽  
Control Factors ◽  
Planning And Design ◽  
End Mills ◽  
Optimal Values ◽  
Inspection Machine ◽  
Grey Relational ◽  
Five Axis

This paper uses the grey relational analysis to find the optimal values of parameters of the servo drives and the controller of a five-axis CNC tool grinder in order to improve precision of grinding and accuracy of end mills. The experimental planning and design are based on the Taguchi method. There are totally six control factors in the experiments, and each factor has three levels. An L18 orthogonal array was applied for the experiments, and each experiment was repeated three times. The grey relational approach was then employed to find the optimal values to the drives and the controller. These values were utilized for grinding a ball nose end mill of cemented tungsten carbide with two-flute and 6 mm in outside diameter. Finally, a well-known tool measuring and inspection machine was used to measure the geometric parameters of the end mill for the initial design and the optimal design. Experimental results show that the grinding time is reduced up to 6.02 ％, and the precision of the ball nose end mill is also improved. Thus, the results demonstrate the effectiveness of the proposed approach.

Torques for Electromechanical Integrating Toroidal Drive

2005 ◽  
Vol 219 (8) ◽  
pp. 801-811 ◽  
Author(s):  
L Xu ◽  
J Huang
Keyword(s):  
Magnetic Induction ◽  
Electromagnetic Theory ◽  
Limit Value ◽  
Load Carrying ◽  
Tooth Number ◽  
Electric Parameters ◽  
Magnetic Induction Intensity ◽  
Driving Torque ◽  
Electromechanical Coupled ◽  
Periodic Changes

In this study, an electromechanical integrating toroidal drive is proposed and its operating principle is introduced. The equations of electromechanical coupled force and the rotor torque for the drive are given by means of electromagnetic theory and mechanical principle. The influenced factors of the rotor torque are analysed and their influences are obtained. There are periodic changes in the rotor torque and the change mainly depends on the tooth number of planet. The changes of the rotor torque along with mechanical and electric parameters of the drive and the limit-driving torque of the drive are presented. The limit driving torque is influenced by rotating angle of the planet and other factors. The minimum limit value decides the load-carrying ability of the drive. The equal-limit torque conditions between planet-worm and planet-stator are discussed. In order to obtain the equal-limit torque, a deterministic relation should be met among the current of the worm, the magnetic induction intensity of the permanent magnet stator, and the airgap thickness.

Micromotion Analysis of a Dental Implant System

2021 ◽  
pp. 519-530
Author(s):  
R. Manimaran ◽  
Vamsi Krishna Dommeti ◽  
Emil Nutu ◽  
Sandipan Roy
Keyword(s):  
Dental Implant ◽  
Design Method ◽  
Uniform Design ◽  
Fe Analysis ◽  
The Novel ◽  
Element Analysis ◽  
Control Factors ◽  
Improved Design ◽  
Uniform Design Method ◽  
Implant System

The objective of project is to reduce the micromotion of novel implant under the static loads using function of uniform design for FE analysis. Integrating the features of regular implant, a new implant model has been done. Micromotion of the novel implant was obtained using static structural FE analysis. Compared to the existing International team for implantology implants, the micromotion of the novel implant model was considerably decreased by static structural analysis. Six control factors were taken for achieving minimizes the micromotion of novel dental implant system. In the present work, uniform design technique was used to create a set of finite element analysis simulation: according to the uniform design method, all FE analysis simulation; compared to the original model, the micromotion is 0.01944mm and micromotion of improved design version is 0.01244mm. The improvement rate for the micromotion is 35.02%.

Multicriteria optimization of technological parameters for obtaining composite material Pb-C and carbon coating

2020 ◽  
pp. 166-174
Author(s):  
С.Н. Сергеенко ◽  
А.Н. Васильев ◽  
Д.В. Василенко
Keyword(s):  
Composite Material ◽  
Multicriteria Optimization ◽  
Carbon Coating ◽  
Lead Acid Battery ◽  
Technological Parameters ◽  
Carbon Coatings ◽  
Graphite Content ◽  
Technological Factors ◽  
Battery Electrode ◽  
Optimal Values

Предложена методика и проведена многокритериальная оптимизация значений технологических факторов получения порошкового композиционного материала Pb-C и углеродных покрытий. Определены оптимальные значения: - содержания и типа армирующих нитей, обеспечивающих повышенный комплекс механических свойств при минимальном содержании армирующих нитей; - содержания графита и продолжительности механической активации шихты, обеспечивающих повышенные значения прочности на срез и твердости композиционного материала Pb-C электрода свинцово-кислотного аккумулятора при утилизации отходов. На основе проведенной многокритериальной оптимизации предложены улучшенные технологические схемы изготовления композитов. A technique is proposed and a multicriteria optimization of the values of technological factors for obtaining a powder composite material Pb-C and carbon coatings is carried out. The optimal values have been determined: - the content and type of reinforcing threads, providing an increased set of mechanical properties with a minimum content of reinforcing threads; - the graphite content and the duration of the mechanical activation of the mixture, providing increased values of shear strength and hardness of the composite material Pb-C lead-acid battery electrode during waste disposal. Basierend auf der Multikriteria-Optimierung werden verbesserte technologische Schemata für die Herstellung von Verbundwerkstoffen vorgeschlagen.

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