An Experimental Study on the Impact on Vari-Speed Milling to the Capacity Machine Tool

2011 ◽  
Vol 188 ◽  
pp. 648-651
Author(s):  
Xiao Qiang Xue ◽  
Ning He ◽  
Liang Li ◽  
Wei Zhao ◽  
Qi Wang
Keyword(s):  
Experimental Study ◽  
Comparative Analysis ◽  
Machine Tool ◽  
Proper Time ◽  
Constant Speed ◽  
Cutting Depth ◽  
Stability Lobes ◽  
Parameters Selection ◽  
The Stability ◽  
The Impact

The axial limit cutting depth(LCD) of constant speed were studied, and the stability lobes were gotten by expriments and simulation. The vari-speed milling selected various parameters was investigated by expriments,also.The experimental results show that varying speed milling approach improves the limit cutting depth on proper time and prope parameters selection. According to the comparative analysis of the exprimental results of constant speed and vari-speed milling, it was obtained whether the varying speed milling approach was to be chosen and how to select proper parameters, should be reference to the stability lobes of constant speed.

scholarly journals Experimental Study of the Chaotic Jerk Circuit Application for Chaos Shift Keying

2021 ◽  
Vol 58 (4) ◽  
pp. 55-68
Author(s):  
F. Capligins ◽  
A. Litvinenko ◽  
A. Aboltins ◽  
E. Austrums ◽  
A. Rusins ◽  
...  
Keyword(s):  
Experimental Study ◽  
Voltage Drop ◽  
Experimental Studies ◽  
Chaotic Synchronization ◽  
Channel Noise ◽  
Error Feedback ◽  
Shift Keying ◽  
The Stability ◽  
Chaos Shift Keying ◽  
The Impact

Abstract The paper presents a study of the chaotic jerk circuit (CJC) employment capabilities for digital communications. The concept of coherent chaos shift keying (CSK) communication system with controlled error feedback chaotic synchronization is proposed for a specific CJC in two modifications. The stability of chaotic synchronization between the two CJCs was evaluated in terms of voltage drop at the input of the slave circuit and the impact of channel noise using simulations and experimental studies.

Influence of Helix Angle in Low Immersion Milling Forces and Stability Analysis: down-Milling, up-Milling and Slotting

2011 ◽  
Vol 308-310 ◽  
pp. 1565-1570
Author(s):  
Muhammad Masud Akhtar ◽  
Xiang Huang ◽  
Wen Liang Chen ◽  
Zi Xiong Lin
Keyword(s):  
Order Approximation ◽  
Helix Angle ◽  
Good Surface ◽  
Zero Order Approximation ◽  
Stability Lobes ◽  
Good Surface Finish ◽  
The Stability ◽  
Prediction Control ◽  
Milling Forces ◽  
The Impact

Chatter is the most obscuring phenomenon and significant amount of research has been documented regarding prediction, control and elimination of chatter. Chatter is still a main hindrance in achieving good surface finish and productivity. This paper presents the influence of helix angle of milling cutter in down-milling, up-milling and slotting operation. Altintas multi-frequency solution (MFS) is advanced by adding the impact of helix angle in milling forces. A comparison is made for stability lobes diagram based on the helix angle model for different helix angles against the Altintas multi-frequency solution model (MFS) and zero order approximation (ZOA) model. The comparison shows that for small helix angle the stability lobes follow the Altintas (MFS) model and for high helix angle the stability lobes follow the Altintas (ZOA) model. The experimental results prove the simulations. Introduction

scholarly journals 1708 year in the Belarus: an comparative analysis of the three biggest battles blind spots

2019 ◽  
pp. 31-39
Author(s):  
O. N. Slisarenko
Keyword(s):  
Comparative Analysis ◽  
Military Operations ◽  
The South ◽  
Russian Army ◽  
Main Motive ◽  
Long Time ◽  
The Stability ◽  
Real Picture ◽  
The Impact ◽  
Great Northern War

The article is devoted to one of the key moments of the Great Northern war – the campaign of the Swedish king Charles XII to Moscow. The historians of this campaign until now has not come to a consensus about what caused the sudden turn of the Swedish army to the South with a main route to Moscow. In the article on the basis of the analysis of historiographical achievements of recent years, a comparative analysis of military operations that took place on the territory of Belarus in the summer – autumn of 1708. In this period there were three major battles at the crossings of important water boundaries: when Golovchino, Maletichy and Lesnaja. All of them had different outcomes, so it is interesting to analyze in detail the features of these battles. The author believes that the Russian army managed to combine the impact on the Swedish army of different kind of troops: guards infantry, horse dragoon regiments and irregular cavalry (cossacks, kalmyks and tatars). The Russian army tried to weaken the enemy forces by creating difficulties in supply. The main motive for turning to the South of Charles XII was the loss of a military convoy, accompanied by a corps Lewenhaupt. The degree of reliability of the sources covering the events of the Great Northern war on the territory of Belarus in 1708 is analyzed. Based on the method of comparative analysis of sources, the author attempts to restore the real picture of the events. The conclusion is made about deliberate distortion of facts in the official Russian historiography in order to create a positive image of Tsar Peter I and his associates both in the international arena and within the country. The stability of this tradition for a long time is revealed.

scholarly journals Level Detection Equipment for Measuring the Influence of Different Leveling Accuracies on Linear Error

2021 ◽  
Vol 2021 ◽  
pp. 1-15
Author(s):  
Shao-Hsien Chen ◽  
Chi-Li Ji
Keyword(s):  
Machine Tool ◽  
Low Cost ◽  
Numerical Control ◽  
Fuzzy Regression ◽  
Rectilinear Motion ◽  
Kinematic Error ◽  
Cnc Machine ◽  
Allowable Error ◽  
The Stability ◽  
The Impact

This study developed a level detection equipment which is used in computer numerical control (CNC) machine tool to determine the impact of leveling accuracy on rectilinear motion accuracy. When the CNC precision machine tool has accuracy deterioration under external load or internal stress, mainly caused error is leveling error, this research and development equipment can immediate to analyze and measurement. The allowable error of leveling accuracy can be obtained after experimental validation. The kinematic error relatively increases with leveling error. When the leveling accuracy is within the allowable error, the kinematic error relatively decreases. The main kinematic error items measured in this study include EXX, EBY, EAX, and EYY. The level detection equipment is developed in this study, and the fuzzy regression analysis is used for modeling. The model that has high accuracy in the test of the X -axis is R 2 = 0.9764 and P = 0.0506 , and Y -axis is R 2 = 0.9756 and P = 0.0524 . In terms of filtering, Kalman filtering is used for signal processing, the measured values and X -axis and Y -axis after filtering are improved by 94.1% and 86.2%, respectively, the repeatability of this system is about A grade capability of precision (Cp), resolution is ±0.0001°, and the stability is at least B grade capability of accuracy (Ca). This equipment has the advantages of low cost, high precision, and 2-axis measurement. This machine tool which has the straightness increases with X and Y axes’ leveling accuracy errors, when the X / Y leveling accuracy is within ±0.01 mm/m, and there is the best straightness and conforms to the ISO230 standard (Lee et al., 2020).

An experimental study on the impact of the rear track width on the stability of agricultural tractors using a test bench

2011 ◽  
Vol 48 (4) ◽  
pp. 319-323 ◽  
Author(s):  
I. Gravalos ◽  
T. Gialamas ◽  
S. Loutridis ◽  
D. Moshou ◽  
D. Kateris ◽  
...  
Keyword(s):  
Experimental Study ◽  
Test Bench ◽  
Track Width ◽  
Agricultural Tractors ◽  
The Stability ◽  
The Impact

Experimental Study of the Impact of Component Nominal Deviations on the Stability of Vilnius Chaotic Oscillator

2020 ◽  
Author(s):  
Darja Cirjulina ◽  
Dmitrijs Pikulins ◽  
Ruslans Babajans ◽  
Davis Daniels Anstrangs ◽  
Iheanacho Chukwuma Victor ◽  
...  
Keyword(s):  
Experimental Study ◽  
Chaotic Oscillator ◽  
The Stability ◽  
The Impact

scholarly journals Experimental Study on Stability Analysis of a Structure during Excavation beneath This Structure

2020 ◽  
Vol 2020 ◽  
pp. 1-14
Author(s):  
Yichen Miao ◽  
Baoxian Liu ◽  
Changwu Liu ◽  
Zhile Shu ◽  
Haikuan Wu
Keyword(s):  
Experimental Study ◽  
Stability Analysis ◽  
Model Test ◽  
Scale Model ◽  
Engineering Practice ◽  
Underground Space ◽  
Strain Change ◽  
Concrete Building ◽  
The Stability ◽  
The Impact

In order to create more underground space, it was important to investigate the impact of excavation on the preexisting building. In this paper, a scale model test was conducted to analyze the stability of the structure during excavation. The model consisted of underpinning piles preinstalled in clay, with a reinforced concrete building placed on underpinning piles. The strain and settlement of the structure were observed to reveal the time settlement of columns and the time strain of beams, columns, and piles during excavation. The results showed that the strain change of beams was small, and strain values of columns were getting higher. And underpinning piles had great strain variations. They were of great significance to underpinning design and engineering practice.

Experimental study of thermohydraulic characteristics and irreversibility analysis of novel axial corrugated tube with spring tape inserts

2020 ◽  
Vol 92 (3) ◽  
pp. 30901
Author(s):  
Suvanjan Bhattacharyya ◽  
Debraj Sarkar ◽  
Ulavathi Shettar Mahabaleshwar ◽  
Manoj K. Soni ◽  
M. Mohanraj
Keyword(s):  
Heat Transfer ◽  
Experimental Study ◽  
Thermal Performance ◽  
Working Fluid ◽  
The Novel ◽  
Heat Exchanger Tube ◽  
Heat Transfer Augmentation ◽  
Corrugated Tube ◽  
The Impact ◽  
Exchanger Tube

The current study experimentally investigates the heat transfer augmentation on the novel axial corrugated heat exchanger tube in which the spring tape is introduced. Air (Pr = 0.707) is used as a working fluid. In order to augment the thermohydraulic performance, a corrugated tube with inserts is offered. The experimental study is further extended by varying the important parameters like spring ratio (y = 1.5, 2.0, 2.5) and Reynolds number (Re = 10 000–52 000). The angular pitch between the two neighboring corrugations and the angle of the corrugation is kept constant through the experiments at β = 1200 and α = 600 respectively, while two different corrugations heights (h) are analyzed. While increasing the corrugation height and decreasing the spring ratio, the impact of the swirling effect improves the thermal performance of the system. The maximum thermal performance is obtained when the corrugation height is h = 0.2 and spring ratio y = 1.5. Eventually, correlations for predicting friction factor (f) and Nusselt number (Nu) are developed.

Dietary Vitamin and Stability of Oral Anticoagulation: Proposal of a Diet with Constant Vitamin K1 Content

1997 ◽  
Vol 77 (03) ◽  
pp. 504-509 ◽  
Author(s):  
Sarah L Booth ◽  
Jacqueline M Charnley ◽  
James A Sadowski ◽  
Edward Saltzman ◽  
Edwin G Bovill ◽  
...  
Keyword(s):  
Dietary Intake ◽  
Vitamin K ◽  
High Performance ◽  
Case Reports ◽  
Food Composition ◽  
Dietary Guidelines ◽  
Dietary Vitamin ◽  
Vitamin K1 ◽  
The Stability ◽  
The Impact

SummaryCase reports cited in Medline or Biological Abstracts (1966-1996) were reviewed to evaluate the impact of vitamin K1 dietary intake on the stability of anticoagulant control in patients using coumarin derivatives. Reported nutrient-drug interactions cannot always be explained by the vitamin K1 content of the food items. However, metabolic data indicate that a consistent dietary intake of vitamin K is important to attain a daily equilibrium in vitamin K status. We report a diet that provides a stable intake of vitamin K1, equivalent to the current U.S. Recommended Dietary Allowance, using food composition data derived from high-performance liquid chromatography. Inconsistencies in the published literature indicate that prospective clinical studies should be undertaken to clarify the putative dietary vitamin K1-coumarin interaction. The dietary guidelines reported here may be used in such studies.

Sign in / Sign up

Export Citation Format

Share Document