Nonlinear Dynamics as a Tool in Selection of Working Conditions for Radial Ball Bearing

2019 ◽  
pp. 49-58 ◽  
Author(s):  
Ivana D. Atanasovska ◽  
Dejan B. Momcilovic ◽  
Radivoje M. Mitrovic ◽  
Natasa D. Soldat ◽  
Nikola Nesic
Keyword(s):  
Nonlinear Dynamics ◽  
Working Conditions ◽  
Ball Bearing ◽  
Selection Of

Global Selection of Features for Nonlinear Dynamics Characterization of Emotional Speech

2012 ◽  
Vol 5 (4) ◽  
pp. 517-525 ◽  
Author(s):  
Patricia Henríquez Rodríguez ◽  
Jesús B. Alonso Hernández ◽  
Miguel A. Ferrer Ballester ◽  
Carlos M. Travieso González ◽  
Juan R. Orozco-Arroyave
Keyword(s):  
Nonlinear Dynamics ◽  
Emotional Speech ◽  
Global Selection ◽  
Selection Of

scholarly journals Human Factor in Smart Industry: A Literature Review

2020 ◽  
Vol 12 (1) ◽  
pp. 87-111 ◽  
Author(s):  
Vander Luiz Silva ◽  
João Luiz Kovaleski ◽  
Regina Negri Pagani ◽  
Alana Corsi ◽  
Myller Augusto Santos Gomes
Keyword(s):  
Literature Review ◽  
Working Conditions ◽  
Industry 4.0 ◽  
Human Performance ◽  
Human Factor ◽  
Physical And Mental Health ◽  
Professional Career ◽  
Smart Industry ◽  
Constant Improvement ◽  
Selection Of

Purpose of the study: The objective of this study is to identify the benefits and challenges of smart industry concept to the human factor, based on the concept of Industry 4.0.Methodology/approach: A systematic literature review was elaborated, based on structured protocols for the selection of a bibliographic portfolio of articles. A bibliometric analysis of the data and content analysis was performed.Originality/relevance: The article discusses human work, focusing on theoretical and practical contributions of international literature. The focus scenario is smart industry, a concept in constant improvement, which currently has acquired influences from Industry 4.0.Main results: The discussions lead us to ponder on human factor in smart industries in the categories physical and mental health at work, human performance and professional career in general. The conclusions points to the need to ensure adequate working conditions in cognitive and psychic aspects, among others.Theoretical and methodological contributions: We present major literature articles, smart industry definitions, main technologies, and grouping benefits and challenges to the human factor.

Studies of the Modelling Accuracy of Steam Turbine Control Systems for Diagnostic Tests of Automatic Synchronizers

2013 ◽  
Vol 199 ◽  
pp. 61-66
Author(s):  
Grzegorz Redlarski ◽  
Janusz Piechocki ◽  
Mariusz Dąbkowski
Keyword(s):  
Angular Velocity ◽  
Control Systems ◽  
Working Conditions ◽  
Synchronous Generator ◽  
Angular Speed ◽  
Velocity Control ◽  
Reliable Operation ◽  
Relevant Field ◽  
The Impact ◽  
Selection Of

One of the important factors that affect the reliable operation of the power system and the rapid restitution after disaster is a quick and effective combining synchronous electric power facilities to operate in parallel [. Hence, diagnostics of automatic synchronizers at every stage of their life, from building a prototype, through the whole life, until removing such devices from the operation, is an extremely important and responsible activity. In ordinary practice, this action is performed by dedicated test of mechatronics systems, called simulators [2, , in close to real - or even more restricted - conditions. One of the major limitations in the relevant field undoubtedly concerns the selection of an appropriate structure and implementation of models of the angular velocity control systems involved in the process of connection. These models must be simple enough to allow computation with a frequency of kHz, and, at the same time, developed enough to be able to form diverse and close to real working conditions. For these reasons, classical approach is not possible, allowing the use of well-known Parks model [ of the synchronous generator and the complex - and often nonlinear [. Hence, considered above-mentioned requirements and indicated constraints, to test the automatic synchronizer the designers of mechatronics systems use a number of simplifications during modeling of the angular speed control systems [. However, models are not detailed enough to study the impact of changes in the shape of relevant characteristics under the influence of changes the angle of phase discrepancy in the process of connecting. Hence, this paper presents the results of the research of the currently used method of modeling the most commonly used control systems of angular velocity, in the respective systems.

MODELING OF PUMP OPERATION CONDITIONS IN GRAVITY-PRESSURE COMBINED SYSTEMS

2017 ◽  
Vol 168 (48) ◽  
pp. 35-44
Author(s):  
Ireneusz Nowogoński ◽  
Ewa Ogiołda ◽  
Marlena Kubiszyn
Keyword(s):  
Working Conditions ◽  
Dynamical Analysis ◽  
Active Volume ◽  
Pump Operation ◽  
Operation Conditions ◽  
Pump Station ◽  
Pumping Stations ◽  
Pump Stations ◽  
Systems Simulation ◽  
Selection Of

The paper presents the problem of working conditions in gravitationalpressure systems simulation. The practical example takes into account the dynamical analysis of a system equipped with 10 pump stations with different functions. Both local press stations, local stations for shallowing network and transit pumping stations between the towns were used. The model allowed to optimize the active volume of the pump station tanks, the selection of pumps, including the frequency of power on and the time of holding the sewage.

scholarly journals The regions of parametric instability of brush-contact device electromagnetic circuit in unstable working conditions

2015 ◽  
Vol 1 ◽  
pp. 84
Author(s):  
O.I. Kozyreva ◽  
I.V. Plokhov ◽  
Y. N. Guraviev ◽  
I. E. Savraev ◽  
A. V. Ilyin
Keyword(s):  
Working Conditions ◽  
Electromagnetic Waves ◽  
Parametric Instability ◽  
Dissipative System ◽  
Degree Of Freedom ◽  
Contact Device ◽  
Instability Regions ◽  
Oscillation Equation ◽  
Selection Of

<p class="R-AbstractKeywords"><span lang="EN-US">The method to determine parametric instability regions of the electromagnetic circuit of the secluded brush contact of brush-contact device with using the oscillation equation  Mathieu II order for a dissipative system with one degree of freedom is developed. Recommendations on the selection of the parameters of the external damping device to eliminate the instability of electromagnetic waves in unstable working conditions brush-contact device are  given.</span></p>

scholarly journals The Quality Improvement of Periodic Medical Examinations of Working People and Professional Aptitude Expertise

2018 ◽  
Vol 3 (2) ◽  
pp. 30-36
Author(s):  
LA A Strizhakov ◽  
SA A Babanov ◽  
DS S Budash ◽  
AG G Baikova
Keyword(s):  
Risk Assessment ◽  
Quality Improvement ◽  
Working Conditions ◽  
Occupational Risk ◽  
Primary And Secondary Prevention ◽  
Existing Problems ◽  
Working People ◽  
Special Assessment ◽  
Medical Examinations ◽  
Selection Of

Aims - to analyze the historical aspects of the formation of the national normative framework in the field of primary and periodic medical examinations, to discuss the existing problems in the carrying out of primary and periodic medical examinations of workers and also to make suggestions for quality improvement of primary and periodic medical examinations and for introduction of occupational risk assessment into the practice of primary and periodic medical examinations. Conclusion. For quality improvement of primary and periodic medical examinations, for efficiency improvement of primary and secondary prevention of occupational diseases it is considered to be necessary to take the following suggestions: - fuller coverage of working people by periodic medical examinations; - thorough selection of organizations that perform the special assessment of working conditions; - the use of the results of the special assessment of working conditions for improving working conditions and informing workers about working conditions; - implementation of occupational risk assessment into practice of primary and periodic medical examinations; - the use of modern methods of molecular and genetic screening;

Measuring and Analyzing the Moment of Friction in Double-Row Ball Bearings

2013 ◽  
Vol 199 ◽  
pp. 149-154
Author(s):  
Robert Korbut ◽  
Jerzy Nachimowicz
Keyword(s):  
Experimental Data ◽  
Working Conditions ◽  
Ball Bearing ◽  
Ball Bearings ◽  
Double Row ◽  
The Moment ◽  
Working Resistance ◽  
The Given

On the basis of the experiment, the changes in the moment of friction in the double-row ball bearing were estimated. The experimental data indicated the presence of significant differences between the average values of the moment of friction in the whole spectrum of the rotational speeds that were examined. At the same time it was observed that there exist certain characteristic rotational speeds at which the given bearing is informed by a greater working resistance. It may indicate the presence of both optimal and unfavourable working conditions for these bearings; the conditions during which there occur minimal or, respectively, maximal resistances (in a given situation). The results of the examination were analyzed statistically; the after-examination samples were closely observed and this further visual scrutiny proved that during the work of the bearing, the lubricant was displaced.

Automation of component selection of ball-bearing support of drilling bit

2016 ◽  
Vol 90 (1-4) ◽  
pp. 1059-1065
Author(s):  
B. S. Chetverikov ◽  
M. S. Chepchurov ◽  
I. A. Teterina
Keyword(s):  
Ball Bearing ◽  
Component Selection ◽  
Drilling Bit ◽  
Selection Of
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