scholarly journals Analytical method of designing a comparable milling machine model based on Matlab/Simulink

2017 ◽  
Vol 14 ◽  
pp. 300-305
Author(s):  
Bashir Osman ◽  
Haitao Zhu
Keyword(s):  
Analytical Method ◽  
Milling Machine ◽  
Machine Model ◽  
Matlab Simulink ◽  
Model Based

Optimizing the Step-Feed Ratio and Modeling the Effluents of Aerobic Tank with ASM1 in ECOSUNIDE Process

2012 ◽  
Vol 178-181 ◽  
pp. 526-530
Author(s):  
Ruo Gu Li ◽  
Yan Qiu Zhang
Keyword(s):  
Organic Matter ◽  
Activated Sludge ◽  
Ammonia Nitrogen ◽  
Feed Ratio ◽  
Optimum Ratio ◽  
Matlab Simulink ◽  
Activated Sludge Model ◽  
Model Based ◽  
Autotrophic Bacteria ◽  
Optimum Model

The step feed model based on the Activated Sludge Model No.1 (ASM1) and the optimum model of the ammonia nitrogen (SNH) removal in wastewater were established. Four aeration tanks under the different step feed ratios were simulated by Matlab Simulink. The results show that single-feeding is conducive to the removal of readily biodegradable substrate (SS) and the growth of heterotrophic organisms (XBH), and to lower the biodegradable substrate (XS) at the same time. The SS, XS, and SNH concentrations are 1.36, 5.98, and 3.02 mg/L respectively in effluent. However, the step-feeding is conducive to the SNH removal, and the autotrophic bacteria (XBA) growth. Under the step feed ratio (25/25/25/25%), the SS, XS, and SNH concentrations are 2.64, 10.79, and 2.61 mg/L respectively. Under the optimum ratio (28.7/23.6/20.4/27.2%), step-feeding could further facilitate the removal of SNH and hinder the removal of organic matter, their concentrations are 2.70, 10.98, and 2.47 mg/L respectively.

Application and Research of Digital Technology in Optimal Design of CNC Floor Boring and Milling Machine

2012 ◽  
Vol 429 ◽  
pp. 111-115
Author(s):  
Zhen Long Leng ◽  
Jin Feng Yang ◽  
Qun Ping Liu ◽  
Xun Deng
Keyword(s):  
Numerical Simulation ◽  
Optimal Design ◽  
Digital Technology ◽  
Three Dimensional ◽  
Milling Machine ◽  
Machine Model ◽  
Digital Modeling ◽  
Key Technologies ◽  
The Cost ◽  
Interference Checking

This paper focuses on application of the three-dimensional digital modeling, numerical analysis and optimization, digital control and other key technologies which provide technical support for the design and development in CNC floor boring and milling machine manufactruing. The three-dimensional digital modeling, digital assembly, interference checking help to eliminate some hidden trouble before processing and assembly. Numerical simulation reduces the cost and shortens the cycle of designand manufactruing in the optimal design of the machine. This technique has been successfully applied to a CNC Floor Boring and Milling Machine Model, which has been running for three years and achieved satisfactary economic result.

scholarly journals Research on TANH Material Constitutive Model Based on Analytical Method

2020 ◽  
Vol 56 (9) ◽  
pp. 252
Author(s):  
HAO Xiaole ◽  
YUE Caixu ◽  
CHEN Zhitao ◽  
LIU Xianli ◽  
LIANGS Y ◽  
...  
Keyword(s):  
Constitutive Model ◽  
Analytical Method ◽  
Material Constitutive Model ◽  
Model Based

Virtual Model of Tool Path for Milling Machine at Classical Design Base

2013 ◽  
Vol 282 ◽  
pp. 235-241 ◽  
Author(s):  
Ján Semjon ◽  
Peter Demeč ◽  
Jozef Svetlík
Keyword(s):  
Computer Aided Design ◽  
Tool Path ◽  
Milling Machine ◽  
Coordinate Systems ◽  
Machine Model ◽  
Tool Paths ◽  
True Value ◽  
Classical Design ◽  
Ideal Tool ◽  
Aided Design

This article focuses on issue of proposal ideal tool paths for machine tools. Model of machine consists from 6 basic knots where milling machine disposes spindle placed in the horizontal direction are. Based on mathematical analysis we can detect the movement of machine axes for uncertainty investigated. The calculated values can be compared with machine model developed in Computer - Aided Design. Defining the shape of workpiece as well as assigning an appropriate instrument can be determined by true value of precision workpiece. After substituting the values of specific dimensions we get the final position of vectors point for contact in tool coordinate systems at individual model solids.

Fault Diagnosis and Prognosis in Rotating Machines Carried Out by Means of Model-Based Methods: A Case Study

2013 ◽  
Author(s):  
A. Vania ◽  
P. Pennacchi ◽  
S. Chatterton
Keyword(s):  
Diagnostic Methods ◽  
Rotating Machines ◽  
Machine Model ◽  
Large Power ◽  
Machine Vibration ◽  
Vibration Data ◽  
Machine Maintenance ◽  
Model Based ◽  
Diagnosis And Prognosis ◽  
Fault Diagnosis And Prognosis

Diagnostic methods, based on mathematical models, can be used to identify the most common faults and malfunctions of rotating machines by minimizing the error between experimental vibration data and the corresponding theoretical response of the rotor system caused by a specific set of excitations. These techniques allow the severity and location of the fault to be estimated. Moreover, depending on the fault characteristics, model-based prognostic techniques can be used to study appropriate corrective actions that can eliminate the cause of the malfunctions or reduce the machine vibration levels. This paper shows the results of a diagnostic analysis carried out to investigate the cause of the high vibration of the HP-IP steam turbine of a large power unit that occurred, during the runups, when approaching the first balance resonance. The numerical results confirmed the suspect that this high vibration was caused by a shaft bow. Then, the machine model was used also to study and optimize a corrective action that allowed the operating speed to be reached and the shaft bow to be eliminated by means of the turbine heating caused by a load rise. The successful results obtained with the machine maintenance carried out considering the indications provided by the model-based diagnostic and prognostic analyses are shown and discussed.

Research on the Information Extraction of the Whole Machine Simple Model and Characteristics Reproduction

2010 ◽  
Vol 34-35 ◽  
pp. 1052-1057
Author(s):  
Qing Fu Wang ◽  
Hong Lin Zhao ◽  
Zhi Heng Wu ◽  
Guang Peng Zhang ◽  
Dong Hui Mu ◽  
...  
Keyword(s):  
Quantitative Analysis ◽  
Dynamic Characteristics ◽  
Data File ◽  
Simplified Model ◽  
Milling Machine ◽  
Machine Model ◽  
Static And Dynamic Characteristics ◽  
Vertical Milling ◽  
Vertical Milling Machine ◽  
Machine Structure

The static and dynamic characteristics calculating of the whole machine structure by finite element method lead to dense grid nodes, which is not conducive to rapid quantitative analysis. Therefore, a simplified model and the corresponding static and dynamic characteristics are needed. This paper presents a simplified model using key nodes kept principle and a corresponding software which reads data from resulting data file, extracts information such as coordinates, static and dynamic displacement of relevant nodes from reading data and draws simplified models of the whole machine structure and static and dynamic deformation of it. Take XK173 Vertical Milling Machine as the case research object, establish a complete machine model, analyze the static and dynamic characteristics and reproduce that using simplified model by software. The result shows that the Vertical Milling Machine nodes are reduced from the original 153 238 nodes to156 nodes. It well preserves machine structure and static and dynamic characteristics, and lays foundations for simplifying follow-up quantitative analysis.

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