Innovation Design of Complex Equipment Based on the Multi-Granularity Structures

2011 ◽  
Vol 338 ◽  
pp. 115-119
Author(s):  
Bin Ren ◽  
Guo Dong Yi
Keyword(s):  
Mathematical Model ◽  
Optimal Design ◽  
Injection Molding ◽  
Customer Needs ◽  
Complex Equipment ◽  
The Individual ◽  
Customer Demands

Innovation design is a process that makes it easily to satisfy individual customer demands. This study is aimed to realize the innovation design of complex equipment with better satisfaction to the individual customer needs. Firstly, the optimization mathematical model of innovation design was established. Secondly, structural repository of multi-granularity was developed to support innovation design. Finally, in the application of the design of hydro cylinder of injection molding equipment, we demonstrated that our method successfully generated new designs with optimal design lifetime.

Optimal design and mathematical model applied to establish bioassay programs

2006 ◽  
Vol 123 (4) ◽  
pp. 457-463 ◽  
Author(s):  
G. Sánchez ◽  
J. M. Rodríguez-Díaz
Keyword(s):  
Mathematical Model ◽  
Optimal Design

Multi-Object Multi-Discipline Probabilistic Design of High-Pressure Turbine Blade-Tip Radial Running Clearance

2013 ◽  
Vol 572 ◽  
pp. 551-554
Author(s):  
Wen Zhong Tang ◽  
Cheng Wei Fei ◽  
Guang Chen Bai
Keyword(s):  
Mathematical Model ◽  
High Pressure ◽  
Optimal Design ◽  
Mechanical System ◽  
High Accuracy ◽  
Probabilistic Design ◽  
High Pressure Turbine ◽  
Surface Method ◽  
Blade Tip ◽  
The Mathematical Model

For the probabilistic design of high-pressure turbine (HPT) blade-tip radial running clearance (BTRRC), a distributed collaborative response surface method (DCRSM) was proposed, and the mathematical model of DCRSM was established. From the BTRRC probabilistic design based on DCRSM, the static clearance δ=1.865 mm is demonstrated to be optimal for the BTRRC design considering aeroengine reliability and efficiency. Meanwhile, DCRSM is proved to be of high accuracy and efficiency in the BTRRC probabilistic design. The present study offers an effective way for HPT BTRRC dynamic probabilistic design and provides also a promising method for the further probabilistic optimal design of complex mechanical system.

scholarly journals Time Coordination of Periodic Passenger Train Connections in Conditions of Single-Track Lines

2021 ◽  
Vol 2021 ◽  
pp. 1-17
Author(s):  
Filip Lorenz ◽  
Vit Janos ◽  
Dusan Teichmann ◽  
Michal Dorda
Keyword(s):  
Mathematical Model ◽  
Mathematical Programming ◽  
Real Data ◽  
Real Problem ◽  
Single Track ◽  
Railway Stations ◽  
Optimization Software ◽  
Proposed Model ◽  
The Individual ◽  
The Given

The article addresses creation of a mathematical model for a real problem regarding time coordination of periodic train connections operated on single-track lines. The individual train connections are dispatched with a predefined tact, and their arrivals at and departures to predefined railway stations (transfer nodes) need to be coordinated one another. In addition, because the train connections are operated on single-track lines, trains that pass each other in a predefined railway stations must be also coordinated. To optimize the process, mathematical programming methods are used. The presented article includes a mathematical model of the given task, and the proposed model is tested with real data. The calculation experiments were implemented using optimization software Xpress-IVE.

scholarly journals A modelling approach to estimate the sensitivity of pooled faecal samples for isolation of Salmonella in pigs

2005 ◽  
Vol 2 (4) ◽  
pp. 365-372 ◽  
Author(s):  
Mark E Arnold ◽  
Alasdair Cook ◽  
Rob Davies
Keyword(s):  
Mathematical Model ◽  
Individual Sample ◽  
Sensitive Test ◽  
Sample Weight ◽  
Sample Weights ◽  
Test Sensitivity ◽  
Faecal Samples ◽  
Using Data ◽  
The Individual ◽  
Modelling Approach

The objective of this study was to develop and parametrize a mathematical model of the sensitivity of pooled sampling of faeces to detect Salmonella infection in pigs. A mathematical model was developed to represent the effect of pooling on the probability of Salmonella isolation. Parameters for the model were estimated using data obtained by collecting 50 faecal samples from each of two pig farms. Each sample was tested for Salmonella at individual sample weights of 0.1, 0.5, 1, 10 and 25 g and pools of 5, 10 and 20 samples were created from the individual samples. The highest test sensitivity for individual samples was found at 10 g (90% sensitivity), with the 25 g test sensitivity equal to 83%. For samples of less than 10 g, sensitivity was found to reduce with sample weight. Incubation for 48 h was found to produce a more sensitive test than incubation for 24 h. Model results found increasing sensitivity with more samples in the pool, with the pools of 5, 10 and 20 being more sensitive than individual sampling, and the pools of 20 being the most sensitive of those considered.

scholarly journals Optimal Design for Injection Molding

2009 ◽  
pp. 511-552
Author(s):  
Kalonji K. Kabanemi ◽  
Abdessalem Derdouri ◽  
Jean-François Hétu
Keyword(s):  
Optimal Design ◽  
Injection Molding

Optimal Design of a Six-Bar Linkage for an Anthropomorphic Three-Jointed Finger Mechanism

1992 ◽  
Author(s):  
Jichuan Zhang ◽  
Gongliang Guo ◽  
William A. Gruver
Keyword(s):  
Mathematical Model ◽  
Nonlinear Programming ◽  
Optimal Design ◽  
Transmission Efficiency ◽  
Degree Of Freedom ◽  
Optimal Parameters ◽  
Joint Friction ◽  
Robotic Devices ◽  
End Effectors ◽  
Human Finger

Abstract We treat the design of a three-jointed, anthropomorphic, finger mechanism for prostheses and robotic end-effectors. Based on the study of configurations for the human finger, we propose a six-bar linkage with one degree of freedom for the finger mechanism. A model of the fingertip displacement of the mechanism is derived by a vector analysis approach. We study the effects of joint friction on the transmission efficiency. By measuring the joint positions of a human finger, we develop a mathematical model of the pinching and holding configurations for the human finger. Optimal parameters for the finger mechanism are obtained by nonlinear programming based on motion posture, locus, transmission efficiency, and weight subject to geometric and bionic constraints. Simulations indicate that the mechanism is useful in a variety of prosthetic and robotic devices.

Mathematical Model of Multi-Layer Wall with Phase Change Material and its Use in Optimal Design

2013 ◽  
Vol 649 ◽  
pp. 295-298
Author(s):  
Lubomir Klimes ◽  
Pavel Charvát ◽  
Josef Stetina
Keyword(s):  
Mathematical Model ◽  
Optimal Design ◽  
Phase Change ◽  
Phase Change Material ◽  
Control Volume ◽  
Operational Conditions ◽  
Volume Method ◽  
The Mathematical Model ◽  
Change Material

The paper deals with the mathematical model of the multi-layer wall containing the phase change material (PCM). The model utilizes the effective heat capacity method for modeling the latent heat of phase change and the control volume method is used for the discretization of the model. The utilization of the model is then demonstrated on the problem of the optimal design of the multi-layer wall with the PCM. The TMY2 data for the city of Brno were used in simulations as operational conditions. The main attention is aimed at the determination of the optimal thickness of the PCM layer for the multi-layer wall design with various thicknesses of the masonry.

The Optimal Structure Design of Mold in Powder Injection Molding Based on the Numerical Simulation

2009 ◽  
Vol 16-19 ◽  
pp. 55-59
Author(s):  
Zhen Xing Zheng ◽  
Wei Xia ◽  
Yuan Biao Wu
Keyword(s):  
Numerical Simulation ◽  
Optimal Design ◽  
Injection Molding ◽  
Mathematic Model ◽  
Structure Design ◽  
Powder Injection Molding ◽  
Powder Injection ◽  
Green Is ◽  
Clamp Force

The quality of the green and the shaping efficiency are affected by the mold structure during the course of powder injection molding (PIM). Based on the numerical simulation, the mathematic model for the optimal design of the gating and runner system in PIM mould is constructed. The method is testified by the Moldflow software and the experiment. From the result, it is suggested that the clamp force and the shape cycle are clearly decreased, the green is densified and the samples’ density error of the green is decreased after the optimal design of the mold structure. Furthermore, the number of trial mold is reduced and the shape efficiency is improved.

Sign in / Sign up

Export Citation Format

Share Document