scholarly journals Optimisation of air-distributor channel structural parameters based on Taguchi orthogonal design

2020 ◽  
Vol 21 ◽  
pp. 100685 ◽  
Author(s):  
Guozeng Feng ◽  
Shuya Lei ◽  
Yuejiao Guo ◽  
Dachuan Shi ◽  
Jiu Bing Shen
Keyword(s):  
Orthogonal Design ◽  
Structural Parameters ◽  
Taguchi Orthogonal Design

scholarly journals Finite Element- and Design of Experiment-Derived Optimization of Screw Configurations and a Locking Plate for Internal Fixation System

2019 ◽  
Vol 2019 ◽  
pp. 1-15 ◽  
Author(s):  
Wei Sheng ◽  
Aimin Ji ◽  
Runxin Fang ◽  
Gang He ◽  
Changsheng Chen
Keyword(s):  
Finite Element ◽  
Internal Fixation ◽  
Locking Plate ◽  
Orthogonal Design ◽  
Structural Parameters ◽  
Uniform Design ◽  
Fracture Site ◽  
Element Analysis ◽  
Internal Fixation System ◽  
Fixation System

Objectives. The optimization for the screw configurations and bone plate parameters was studied to improve the biomechanical performances such as reliable internal fixation and beneficial callus growth for the clinical treatment of femoral shaft fracture. Methods. The finite element analysis (FEA) of internal fixation system under different screw configurations based on the orthogonal design was performed and so was for the different structural parameters of the locking plate based on the combination of uniform and orthogonal design. Moreover, orthogonal experiment weight matrixes for four evaluation indexes with FEA were analyzed. Results. The analytical results showed the optimal scheme of screw configuration was that screws are omitted in the thread holes near the fracture site, and single cortical screws are used in the following holes to the distal end, while the double cortical screws are fixed in thread holes that are distal to the fracture; in the other words, the length of the screws showed an increasing trend from the fracture site to the distal end in the optimized configuration. The plate structure was optimized when thread holes gap reached 13 mm, with a width of 11 mm and 4.6 mm and 5 mm for thickness and diameter of the screw, respectively. The biomechanical performance of the internal fixation construct was further improved by about 10% based on the optimal strain range and lower stress in the internal fixation system. Conclusions. The proposed orthogonal design and uniform design can be used in a more efficient way for the optimization of internal fixation system, which can reduce the simulation runs to about 10% compared with comprehensive test, and the methodology can be also used for other types of fractures to achieve better internal fixation stability and optimal healing efficiency, which may provide a method for an orthopedist in choosing the screw configurations and parameters for internal fixation system in a more efficient way.

scholarly journals Surface Roughness Prediction Model for Machining O1 Die Steel Through EDM

2019 ◽  
Vol 4 (2) ◽  
Author(s):  
Jai Prakash ◽  
Ashish Agarwal ◽  
Vipin
Keyword(s):  
Mathematical Model ◽  
Surface Roughness ◽  
Current Pulse ◽  
Process Parameters ◽  
Design Method ◽  
Orthogonal Design ◽  
Die Steel ◽  
Orthogonal Design Method ◽  
Roughness Prediction ◽  
Taguchi Orthogonal Design

The objective of this paper is to generate a mathematical model in order to minimize the value of surface roughness (Ra) through EDM by constructing an objective function consisting of combination of process parameters. Taguchi orthogonal design method of experiments with three process parameters viz., current, pulse-on-rate, pulse-off-rate were used to generate 25 numbers of experiments L25 at five levels. Experiments were carried out in Electronica S50 (CNC) EDM. Data obtained for performance measurement was subjected regression analysis using ANOVA. Equation was obtained for the surface roughness as a function of current, pulse-on rate, pulse-off-rate.It is found that discharge current, pulse-on-rate, and pulse-off-rate have significant effect on the Ra. Higher values of current and pulse-on-rate increased surface roughness. Lower current, lower pulse-on-rate and relatively higher pulse-off-rate produced a better surface finish.

scholarly journals Modal characteristics of harmonic gear transmission flexspline based on orthogonal design method

Open Physics ◽  
2021 ◽  
Vol 19 (1) ◽  
pp. 819-827
Author(s):  
Leyu Wei ◽  
Jie Yang ◽  
Changlu Wang ◽  
Xingxing Wang ◽  
Xinmeng Liu
Keyword(s):  
Finite Element ◽  
Optimal Design ◽  
Natural Frequencies ◽  
Design Method ◽  
Orthogonal Design ◽  
Structural Parameters ◽  
Gear Transmission ◽  
Modal Characteristics ◽  
Orthogonal Design Method ◽  
The Stability

Abstract The flexspline features several modal characteristics that are related to its structural parameters, which could impose an impact on the stability and reliability of the system of harmonic gear transmission. In this article, we have integrated the method of orthogonal design with the approach of finite element, so as to study the modal characteristics of flexspline under varying structural parameters. Furthermore, we have analyzed the ways of how varying structural parameters could impose an impact on the first eight-order natural frequencies of flexspline. In addition, by adopting the method of range and variance analysis for the obtained data, we have examined the influence imposed by varying structural parameters on the modal characteristics of flexspline, which could lay a foundation for the optimal design of the structural parameters of flexspline.

Structural Parameters Optimization of Waveform Generator Based on LS-SVM and Simulated Annealing Algorithm

2012 ◽  
Vol 268-270 ◽  
pp. 871-874
Author(s):  
Yu Liang Yang ◽  
Jun Qi Qin ◽  
Chang Chun Di ◽  
Yan Feng Yang
Keyword(s):  
Simulated Annealing ◽  
Simulated Annealing Algorithm ◽  
Regularization Parameter ◽  
Design Method ◽  
Orthogonal Design ◽  
Structural Parameters ◽  
Parameters Optimization ◽  
Waveform Generator ◽  
Sample Data ◽  
Annealing Algorithm

For the structural design problem of waveform generator, selected diameter of rubber block, hardness and thickness of block 1 and block 2 as five design variables. Firstly, adopted orthogonal design method, and built initial sample data. Secondly, adopted LS-SVM to exercise the sample data, and selected regularization parameter and kernel function width of LS-SVM based on QPSO algorithm. Finally, optimized the structural parameters of waveform generator based on simulated annealing algorithm. The research provided a theoretic basis for the design of waveform generator.

Roughness Optimization of Electroless Ni-B Coatings Using Taguchi Method

2011 ◽  
Vol 1 (3) ◽  
pp. 53-71 ◽  
Author(s):  
Suman Kalyan Das ◽  
Prasanta Sahoo
Keyword(s):  
Process Parameters ◽  
Orthogonal Design ◽  
Bath Temperature ◽  
Vital Role ◽  
Reducing Agent ◽  
Coating Process ◽  
X Ray ◽  
Electron Microscopes ◽  
Electroless Ni ◽  
Taguchi Orthogonal Design

In this paper, the authors present an experimental study of roughness characteristics of electroless Ni-B coatings and optimization of the coating process parameters based on L27 Taguchi orthogonal design. Three coating process parameters are considered viz. bath temperature, reducing agent concentration, and nickel source concentration. It is observed that concentration of reducing agent together with bath temperature play a vital role in controlling the roughness characteristics of the coatings. The analysis yields the optimum coating parameter combination for minimum roughness. A reduction of about 15% is observed in roughness at the optimal condition compared to the initial condition. The microstructure, composition, and the phase content of the coating are also studied with the help of scanning electron microscopes energy dispersive X-ray analysis, and X-ray diffraction analysis, respectively.

Parametric Optimization of Process Parameters on the Response of Microhardness of Electroless Ni-P Coating

2018 ◽  
Vol 06 (01n02) ◽  
pp. 1850003 ◽  
Author(s):  
Subhasish Sarkar ◽  
Rishav Kumar Baranwal ◽  
Shubhankar Banerjee ◽  
Aditya Prakash ◽  
Rupam Mandal ◽  
...  
Keyword(s):  
Process Parameters ◽  
Orthogonal Design ◽  
Copper Substrate ◽  
Bath Temperature ◽  
Sodium Hypophosphite ◽  
Nickel Sulphate ◽  
X Ray ◽  
Optimization Of Process Parameters ◽  
The Individual ◽  
Taguchi Orthogonal Design

The present work deals with the synthesis of chemically deposited nickel–phosphorous (Ni–P) coating on copper substrate. The process parameters are optimized for maximum hardness based on L[Formula: see text] Taguchi orthogonal design with three process parameters, viz., bath temperature, concentration of nickel Sulphate (a nickel source) and concentration of sodium hypophosphite (a reducing agent), respectively. This is considered and fitted into an L[Formula: see text] orthogonal array (OA) to find out the optimized condition for improved hardness of the coating. The optimized results were obtained from 35[Formula: see text]g/L of Nickel Sulphate, 20[Formula: see text]g/L of Sodium Hypophosphite and 90∘C of temperature. Analysis of variance (ANOVA) was performed to determine the significance of the individual process parameters. ANOVA showed that the factor Nickel Sulphate, the interaction between Sodium Hypophosphite and Temperature were significant in determining the hardness of the coating deposited in the optimized condition. The surface morphology, compositional and phase structure analysis of optimized sample are conducted with the help of scanning electron microscope (SEM), energy-dispersive X-ray analysis and X-ray diffraction (XRD) analyzer, respectively.

Numerical Investigation Based on Orthogonal Design of Structural Parameters on Large-Diameter DTH Hammer Bit

2013 ◽  
Vol 774-776 ◽  
pp. 1442-1445
Author(s):  
Zhi Qiang Zhao ◽  
Li Jia Li ◽  
Kun Bo ◽  
Xu Sheng He ◽  
Jun Feng Chai
Keyword(s):  
Numerical Investigation ◽  
Design Method ◽  
Orthogonal Design ◽  
Structural Parameters ◽  
Large Diameter ◽  
Technical Problem ◽  
Theory Analysis ◽  
Air Volume ◽  
Orthogonal Design Method ◽  
Reverse Circulation

To achieve cutting transport with air reverse circulation in dry and shallow large-diameter holes of rock-socketed pile, and to solve the technical problem with airlift and pump reverse circulation, a large-diameter reverse circulation bit innovatively designed based on ejecting. Meanwhile, the orthogonal design method applied to explore the application feasibility of ejector theory in use of in air reverse circulation drilling. Through theory analysis, three key geometry parameters of air reverse circulation bit have proved to have direct affect on the function of cutting transport, including the diameter of nozzles (Dn), the number of nozzles (N), the angle of inclination (θs). The results have shown that reverse circulation effect of large-diameter bit designed based on ejecting is valid and stable. Further while the air volume of GQF-16 hammer bit goes to 90m3/min, a configuration of parameters with Dn=20mm, N=3, θs=35°are the most ideal parameter combinations.

The Effects of Parameter Settings on Shrinkage and Warpage in Injection Molding through Cadmould 3D-F Simulation and Taguchi Method

2012 ◽  
Vol 229-231 ◽  
pp. 2536-2540 ◽  
Author(s):  
Mohd Hilmi Othman ◽  
Shazarel Shamsudin ◽  
Sulaiman Hasan
Keyword(s):  
Injection Molding ◽  
Process Parameters ◽  
Orthogonal Design ◽  
Simulation Software ◽  
P Value ◽  
Packing Pressure ◽  
Filling Time ◽  
Main Effects ◽  
The Impact ◽  
Taguchi Orthogonal Design

This study is focused on the effects of process parameters in plastic injection molding towards shrinkage and warpage problem of High Density Polyethylene (HDPE) specimen. The aim was to identify the main effects of different process parameters on warpage and shrinkage defects via numerical simulation software and experimental validation. Series of simulations were carried out using Cadmould 3D-F in order to utilize the combination of process parameters based on three level of L9 Taguchi orthogonal design. The Signal to Noise (S/N) ratio and the Analysis of Variance (ANOVA) were used to optimize the levels and to point out the impact of the process parameters on warpage and shrinkage. From the results, it showed that the most affected parameter on the warpage and shrinkage is packing time, with the P value of 48.93%, followed by melting temperature with 40.58%. The filling time and packing pressure were not a significant factor because they only contribute 7.30% and 3.19% of P value, respectively.

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