Static Analysis and Parameter Optimization of the Grab Bucket

2011 ◽  
Vol 130-134 ◽  
pp. 2625-2628 ◽  
Author(s):  
Xian Long Wang ◽  
Qing Hua Liang ◽  
Wei Zhong Guo
Keyword(s):  
Optimal Design ◽  
Objective Function ◽  
Static Analysis ◽  
Optimum Design ◽  
Parameter Optimization ◽  
Optimization Model

This paper aims to provide an optimum design for the grab bucket on the port, analyze the parameters related to its grabbing function from static aspect. Taking the minimum grabbing moment as static elevation indicators, a nonlinear multi-variable optimization model was established taking the grabbing torque as the objective function. A function atlas was drawn on this purpose. The Matlab GA toolbox has been used in optimal design of the key parameters of grab bucket which used to be designed according to experiences, to improve the grab torque which leads to better performance and the higher efficiency of the grab bucket .In the end, an case was studied to demonstrate its effectiveness.

scholarly journals Optimal design for improving torque performance of permanent magnet motor

2018 ◽  
Vol 7 (2.12) ◽  
pp. 292
Author(s):  
Tae Kyoung Bang ◽  
Kyung Hun Shin ◽  
Jeong In Lee ◽  
Cheol Han ◽  
Sung Kook Cho ◽  
...  
Keyword(s):  
Optimal Design ◽  
Taguchi Method ◽  
Objective Function ◽  
Permanent Magnet ◽  
Optimum Design ◽  
Optimization Process ◽  
Bldc Motor ◽  
Original Design ◽  
Design Point ◽  
Design Variables

Background/Objectives: This paper deals with the optimal design of the BLDC motor considering a rotor structure that is used to electrically drive tools. Generally, electrically driven tools employ the BLDC motor, which should be able to operate in high-speed and high-vibration environments. However, it has the disadvantages of a high torque ripple and significant waveform fluctuation. Therefore, it is necessary to optimize it according to the usage condition.Methods/Statistical analysis: In improving the torque performance, this study performed the optimization process by employing the Taguchi method, which can achieve a robust design based on the design variables. In the optimization process, the objective functions are set using a weighting ratio depending on the importance of the objective function as back EMF, torque performance, and loss. Through the optimization process, the optimal design point that improved the performance of the objective function is derived. The improved design that applied the optimal design point is compared with the original design by using the finite element method (FEM) analysis results.Findings: In this study, the optimum design of the motor according to the design variables and the objective function is derived through the optimum design method using the Taguchi method by adopting the motor for the electrically driven tool as the interior permanent magnet type BLDC motor and the FEM results. Moreover, by comparing the analysis results with the optimized model and the initial model, the optimum design point that satisfies the restriction specification and the rated specification was found.Improvements/Applications: The optimum design point was found by using the Taguchi method and the loss and torque characteristics were improved. 

One Optimum Design Method of Dry-Type Air-Cored Reactors

2011 ◽  
Vol 130-134 ◽  
pp. 3229-3232
Author(s):  
Li Ping Zheng ◽  
Hai Yu ◽  
Ju Feng Dou
Keyword(s):  
Genetic Algorithm ◽  
Optimal Design ◽  
Optimum Design ◽  
Optimization Model ◽  
Design Method ◽  
Improved Genetic Algorithm ◽  
Terminal Voltage ◽  
Set Up ◽  
Correlated Parameters ◽  
Inductive Potential

The process of designing a dry-type air-cored reactor is one repeated way of computing and regulating the correlated parameters, and it is very complex and time-consuming. Therefore, Genetic Algorithm is introduced in this paper, for the purpose of reducing error between total inductive potential of coils and the terminal voltage, we set up the optimization model of an air-cored reactor, and the Improved Genetic Algorithm is adopted to make an optimal design for the air-cored reactor. The results show that designed accuracy can be greatly improved.

Shape Optimization of Hydraulic Structures: an Example of an Optimum Design of a Fish Passage

10.29007/2k64 ◽  
2018 ◽  
Author(s):  
Pat Prodanovic ◽  
Cedric Goeury ◽  
Fabrice Zaoui ◽  
Riadh Ata ◽  
Jacques Fontaine ◽  
...  
Keyword(s):  
Numerical Model ◽  
Shape Optimization ◽  
Objective Function ◽  
Optimum Design ◽  
Optimization Problem ◽  
A Priori ◽  
Coupled System ◽  
Fish Passage ◽  
Hydraulic Structures ◽  
Design Variables

This paper presents a practical methodology developed for shape optimization studies of hydraulic structures using environmental numerical modelling codes. The methodology starts by defining the optimization problem and identifying relevant problem constraints. Design variables in shape optimization studies are configuration of structures (such as length or spacing of groins, orientation and layout of breakwaters, etc.) whose optimal orientation is not known a priori. The optimization problem is solved numerically by coupling an optimization algorithm to a numerical model. The coupled system is able to define, test and evaluate a multitude of new shapes, which are internally generated and then simulated using a numerical model. The developed methodology is tested using an example of an optimum design of a fish passage, where the design variables are the length and the position of slots. In this paper an objective function is defined where a target is specified and the numerical optimizer is asked to retrieve the target solution. Such a definition of the objective function is used to validate the developed tool chain. This work uses the numerical model TELEMAC- 2Dfrom the TELEMAC-MASCARET suite of numerical solvers for the solution of shallow water equations, coupled with various numerical optimization algorithms available in the literature.

COMPARISON OF TWO OPTIMIZATION MODELS FOR CONSTRUCTING PATTERNS IN THE METHOD OF LOGICAL ANALYSIS OF DATA

2020 ◽  
pp. 10-13
Author(s):  
Р.И. Кузьмич ◽  
А.А. Ступина ◽  
С.Н. Ежеманская ◽  
А.П. Шугалей
Keyword(s):  
Objective Function ◽  
Optimization Model ◽  
Logical Analysis ◽  
Optimization Models ◽  
Logical Analysis Of Data

Предлагаются две оптимизационные модели для построения информативных закономерностей. Приводится эмпирическое подтверждение целесообразности использования критерия бустинга в качестве целевой функции оптимизационной модели для получения информативных закономерностей. Информативность, закономерность, критерий бустинга, оптимизационная модель Comparison of two optimization models for constructing patterns in the method of logical analysis of data Two optimization models for constructing informative patterns are proposed. An empirical confirmation of the expediency of using the boosting criterion as an objective function of the optimization model for obtaining informative patterns is given.

scholarly journals Research on Aerosol Retrieval Algorithm of Multi-parameter Optimization Model

2021 ◽  
Vol 658 (1) ◽  
pp. 012039
Author(s):  
Jiabao Yue ◽  
Donghai Xie ◽  
Jie Yu ◽  
Lin Zhu ◽  
Zhengyang He
Keyword(s):  
Parameter Optimization ◽  
Optimization Model ◽  
Retrieval Algorithm ◽  
Aerosol Retrieval

Improvement of the Static and Dynamic Characteristics of Magnetic Head Sliders by Optimum Design

1999 ◽  
Vol 122 (1) ◽  
pp. 280-287 ◽  
Author(s):  
Hiromu Hashimoto ◽  
Yasuhisa Hattori
Keyword(s):  
Objective Function ◽  
Optimum Design ◽  
Amplitude Ratio ◽  
Optimization Technique ◽  
Hard Disk Drives ◽  
Maximum Amplitude ◽  
Disk Surface ◽  
Operating Conditions ◽  
Magnetic Head ◽  
Design Variables

The aim of this paper is to develop a general methodology for the optimum design of magnetic head sliders in improving the spacing characteristics between a slider and disk surface under static and dynamic operating conditions of hard disk drives and to present an application of the methodology to the IBM 3380-type slider design. To generate the optimal design variables, the objective function is defined as the weighted sum of the minimum spacing, the maximum difference in the spacing due to variation of the radial location of the head, and the maximum amplitude ratio of the slider motion. Slider rail width, taper length, taper angle, suspension position, and preload are selected as the design variables. Before the optimization of the head, the effects of these five design variables on the objective function are examined by a parametric study, and then the optimum design variables are determined by applying the hybrid optimization technique, combining the direct search method and successive quadratic programming. From the obtained results, the effectiveness of optimum design on the spacing characteristics of magnetic heads is clarified. [S0742-4787(00)03701-2]

Framework for investigating the effect of different design lives on the design of bridges

2021 ◽  
Author(s):  
Egor Svechnikov ◽  
Johan Maljaars ◽  
Bert Snijder ◽  
Johan de Boon ◽  
Eize Drenth
Keyword(s):  
Optimal Design ◽  
The Netherlands ◽  
Optimum Design ◽  
Functional Capacity ◽  
Road Network ◽  
Developed Countries ◽  
Research Activities ◽  
Design Life ◽  
National Road ◽  
Structural Solutions

<p>Many developed countries have a national road network including a significant number of bridges in need of renovation or replacement in the coming years. The reason for this is their technical and functional capacity becoming insufficient due to aging and changes in societal demands. Therefore, these bridges need to be adjusted or replaced. National authorities in The Netherlands currently require a design life of 100 years for new bridges, however nowadays it seems reasonable to have a certain flexibility for this parameter. Since the selected design life has its implications on structural solutions and choice of materials, the identification of the optimal design life for bridges seems necessary. This paper gives a summary on the issue regarding the optimum design life of bridges and it highlights the framework of the upcoming research activities.</p>

Optimum Design of Magnetic Head Slider Under Static and Dynamic Operation Conditions of Hard Disk Drive

1999 ◽  
Author(s):  
Yasuhisa Hattori ◽  
Hiromu Hashimoto ◽  
Masayuki Ochiai
Keyword(s):  
Objective Function ◽  
Hard Disk Drive ◽  
Optimum Design ◽  
Hard Disk ◽  
Disk Drive ◽  
Magnetic Head ◽  
Head Slider ◽  
Dynamic Operation ◽  
Operation Conditions ◽  
Design Variables

Abstract The aim of this paper is to develop the general methodology for the optimum design of magnetic head slider for improving the spacing characteristics between head slider and disk surfaces under the static and dynamic operation conditions of hard disk drive and to present an application of the methodology to IBM 3380-type slider design. In the optimum design, the objective function is defined as the weighted sum of minimum spacing, maximum difference of spacing due to variation of radial location of head and maximum amplitude ratio of slider motion. Slider rail width, taper length, taper angle, suspension position and preload are selected as the design variables. Before the optimization of magnetic head slider, the effects of these five design variables on the objective function are examined by the parametric study, and then the optimum design variables are determined by applying the hybrid optimization technique combining the direct search method and the successive quadratic programming (SQP). From the results obtained, the effectiveness of optimum design on the spacing characteristics of magnetic head slider is clarified.

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