Performance Prediction of Assembly Based on Dynamic Alignment

2012 ◽  
Vol 271-272 ◽  
pp. 657-662 ◽  
Author(s):  
Fei Wan ◽  
Guo Xi Li ◽  
Zhi Hua Rao
Keyword(s):  
Experimental Data ◽  
Mechanical System ◽  
Process Parameters ◽  
Dynamic Characteristics ◽  
Performance Prediction ◽  
Computational Experiments ◽  
Process Performance ◽  
The Status ◽  
Alignment Process ◽  
Dynamic Alignment

To change the status of time-consuming and over-reliance on technicians in mechanical system alignment process, performance prediction based on dynamic alignment was proposed. The mapping relationship between alignment process parameters and machine dynamic characteristics was established. A large number of computational experiments are implemented by adjusting the value of process parameters in order to learn and anticipate experimental data and also find out the rules of process parameters on machine dynamic characteristics. The method can optimize the alignment process, guide technician alignment, modify the theory mapping, and improve the alignment efficiency.

Research on Dynamic Alignment for Sophisticated System Based on ACP Technology

2012 ◽  
Vol 630 ◽  
pp. 473-478 ◽  
Author(s):  
Fei Wan ◽  
Guo Xi Li ◽  
Jing Zhong Gong ◽  
Bao Zhong Wu
Keyword(s):  
Experimental Data ◽  
Dynamic Simulation ◽  
Process Parameters ◽  
Simulation Software ◽  
Contact Theory ◽  
Dynamic Parameters ◽  
Agent Model ◽  
The Status ◽  
Alignment Process ◽  
Dynamic Alignment

To change the status of time-consuming and over-reliance on technicians in mechanical system alignment process, the ACP technology is presented. The mapping between alignment process parameters and dynamic parameters was established through contact theory to build the agent model for parts. While the second mapping between dynamic parameters and machine dynamic characteristics is calculated by dynamic simulation software to conduct computational experiments. Experimental data is analyzed in order to implement data mine, optimize the alignment process, guide technician alignment, modify the theory mapping and improve the alignment efficiency.

Research on Complex Precision Mechanical System Assembly Parallel Control System

2012 ◽  
Vol 215-216 ◽  
pp. 1267-1275
Author(s):  
Bao Zhong Wu ◽  
Jing Qiu ◽  
Guo Xi Li ◽  
Jing Zhong Gong
Keyword(s):  
Decision Making ◽  
Control System ◽  
Mechanical System ◽  
Process Optimization ◽  
Dynamic Characteristics ◽  
Main Process ◽  
Assembly Process ◽  
Alignment Process ◽  
Parallel Control

To achieve the assembly process control of aerospace complex precision mechanical systems and ensure its dynamic characteristics, parallel control theory and methodology is used in the assembly process. The main point is: assembly parallel control system is built corresponding to the actual assembly ones. The ultimate quality of assembly is guaranteed via alignment influence analysis on the dynamics characteristics of the assembly joint structural and the assembly machine and the dynamic characteristics-oriented alignment process optimization and decision-making to carry out computing operator and process decision-making in the assembly process. The dissertation ,regarding space sophisticated mechanical system assembly and its dynamic characteristics as study object, introduced the parallel control thought, presented the overall framework of assembly parallel control, built the assembly parallel control system(APCS) and given the main process and implement of assembly parallel control.

Fuzzy Modeling to Simulate Surface Roughness in CNC Turning of AISI 1045 Steel

2011 ◽  
Vol 486 ◽  
pp. 262-265
Author(s):  
Amit Kohli ◽  
Mudit Sood ◽  
Anhad Singh Chawla
Keyword(s):  
Experimental Data ◽  
Surface Roughness ◽  
Process Parameters ◽  
Fuzzy Model ◽  
Fuzzy Modeling ◽  
Cnc Machine ◽  
Model Based ◽  
Aisi 1045 Steel ◽  
Aisi 1045 ◽  
1045 Steel

The objective of the present work is to simulate surface roughness in Computer Numerical Controlled (CNC) machine by Fuzzy Modeling of AISI 1045 Steel. To develop the fuzzy model; cutting depth, feed rate and speed are taken as input process parameters. The predicted results are compared with reliable set of experimental data for the validation of fuzzy model. Based upon reliable set of experimental data by Response Surface Methodology twenty fuzzy controlled rules using triangular membership function are constructed. By intelligent model based design and control of CNC process parameters, we can enhance the product quality, decrease the product cost and maintain the competitive position of steel.

scholarly journals Data intelligence for process performance prediction in biologics manufacturing

2021 ◽  
pp. 107226
Author(s):  
Nishanthi Gangadharan ◽  
David Sewell ◽  
Richard Turner ◽  
Ray Field ◽  
Matthew Cheeks ◽  
...  
Keyword(s):  
Performance Prediction ◽  
Process Performance

Performance prediction of transonic axial multistage compressor based on one-dimensional meanline method

2021 ◽  
pp. 095765092199881
Author(s):  
Yingying Zhang ◽  
Shijie Zhang
Keyword(s):  
Experimental Data ◽  
Mass Flow ◽  
Flow Separation ◽  
Performance Prediction ◽  
Factor Model ◽  
Separation Method ◽  
Prediction Program ◽  
Blockage Factor ◽  
Reliability And Robustness ◽  
Work Done

This study proposes a 1D meanline program for the modeling of modern transonic axial multistage compressors. In this method, an improved blockage factor model is proposed. Work-done factor that varies with the compressor performance conditions is added in this program, and at the same time a notional blockage factor is kept. The coefficient of deviation angle model is tuned according to experimental data. In addition, two surge methods that originated from different sources are chosen to add in and compare with the new method called mass flow separation method. The salient issues presented here deal first with the construction of the compressor program. Three well-documented National Aerodynamics and Space Administration (NASA) axial transonic compressors are calculated, and the speedlines and aerodynamic parameters are compared with the experimental data to verify the reliability and robustness of the proposed method. Results show that consistent agreement can be obtained with such a performance prediction program. It was also apparent that the two common methods of surge prediction, which rely upon either stage or overall characteristic gradients, gave less agreement than the method called mass flow separation method.

scholarly journals The status of CMV as a human pathogen

1988 ◽  
Vol 100 (1) ◽  
pp. 1-15 ◽  
Author(s):  
P. D. Griffiths ◽  
J. E. Grundy
Keyword(s):  
Experimental Data ◽  
Human Body ◽  
Primary Infection ◽  
Immune Surveillance ◽  
Infectious Agent ◽  
Human Pathogen ◽  
The Status

Cytomegalovirus (CMV) is a common infectious agent which is well adapted to its host. Following primary infection, which is almost always asymptomatic in people with normal immunity, the virus establishes latency at sites which are unknown. The virus is probably maintained in this latent state by immune surveillance mechanisms since immunosuppression frequently leads to reactivation of virus.Cytomegalovirus has been identified in most anatomical areas of the human body. The aim of this article is to define criteria for pathogenicity so that clinical and experimental data can be reviewed to determine if CMV is likely to cause disease at these various clinical sites. Thus, patients have been shown to die frequentlywithCMV but do they diefromit?

The Method for Determining the Vibration-Damping Elements for the Mechanical System to Obtain the Desired Amplitude Value

2014 ◽  
Vol 657 ◽  
pp. 644-648 ◽  
Author(s):  
Andrzej Dymarek ◽  
Tomasz Dzitkowski
Keyword(s):  
Mechanical System ◽  
Dynamic Characteristics ◽  
Vibration Reduction ◽  
Mechanical Systems ◽  
Vibration Damping ◽  
Displacement Velocity ◽  
Synthesis Methods ◽  
Resonance Frequencies

The paper presents the use of synthesis methods to determine the parameters of passive vibration reduction in mechanical systems. Passive vibration reduction in a system is enabled by units called dampers whose values are determined on the basis of the method formulated and formalized by the authors. The essence of the method are, established at the beginning of a task, dynamic characteristics in the form of the resonance and anti-resonance frequencies, and amplitudes of displacement, velocity or acceleration of vibration.

Textiles and perishable materials

2018 ◽  
Author(s):  
Johanna Banck-Burgess
Keyword(s):  
Experimental Data ◽  
Everyday Life ◽  
Iron Age ◽  
Raw Materials ◽  
Visual Representations ◽  
Detailed Knowledge ◽  
Textile Production ◽  
Funerary Rituals ◽  
The Status

This chapter challenges traditional views on Iron Age dress. Recent research has greatly enhanced our understanding of how textiles were manufactured in Iron Age Europe. The variety of qualities, textures, techniques, raw materials, colours, and cuts give insights into the detailed knowledge of the craftspeople involved. Textiles used for dress, blankets, or furniture fittings were appreciated not only for their appearance, but also for the quality of the work. In everyday life, their optical qualities were used to express and signal gender, social roles and status, while the labour expended on textiles found in wealthy burials underlines both the status of the deceased and the extent of conspicuous consumption in funerary rituals—for instance, for wrapping grave furniture and goods. The chapter also looks at experimental data showing how labour-intensive textile production was, and the types of clothing and accessories found in different archaeological contexts or depicted in visual representations.

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