Vibration Control in Industrial Plant: A Methodological Approach

1987 ◽  
Vol 109 (4) ◽  
pp. 335-342
Author(s):  
D. Miconi
Keyword(s):  
Mathematical Models ◽  
Vibration Control ◽  
Methodological Approach ◽  
Graphic Representation ◽  
Industrial Plant ◽  
Design Stage ◽  
Machine Foundation ◽  
Damping Characteristics ◽  
Effective Instrument

The present paper is a report on the construction of nomograms to ascertain the domain of elastic-inertial-damping characteristics required in vibrating machine-foundation systems, in order to ensure that ergonomic and other technical constraints are complied with. Nomograms, which are the graphic representation of mathematical models in nondimensional form, prove to be an effective instrument for orientation in the design stage.

scholarly journals A Comprehensive Study on the Optimal Design of Magnetorheological Dampers for Improved Damping Capacity and Dynamical Adjustability

Actuators ◽  
2021 ◽  
Vol 10 (3) ◽  
pp. 64
Author(s):  
Liankang Wei ◽  
Hongzhan Lv ◽  
Kehang Yang ◽  
Weiguang Ma ◽  
Junzheng Wang ◽  
...  
Keyword(s):  
Optimal Design ◽  
Optimization Methods ◽  
Design Stage ◽  
Damping Capacity ◽  
Damping Force ◽  
Simulation And Optimization ◽  
Damping Characteristics ◽  
Hysteretic Characteristics ◽  
Gap Width ◽  
Comprehensive Study

Purpose: We aim to provide a systematic methodology for the optimal design of MRD for improved damping capacity and dynamical adjustability in performing its damping function. Methods: A modified Bingham model is employed to model and simulate the MRD considering the MR fluid’s compressibility. The parameters that describe the structure of MRD and the property of the fluid are systematically examined for their contributions to the damping capacity and dynamically adjustability. A response surface method is employed to optimize the damping force and dynamically adjustable coefficient for a more practical setting related to the parameters. Results: The simulation system effectively shows the hysteretic characteristics of MRDs and shows our common sense understanding that the damping gap width and yoke diameter have significant effects on the damping characteristics of MRD. By taking a typical MRD device setup, optimal design shows an increase of the damping force by 33% and an increase of the dynamically adjustable coefficient by 17%. It is also shown that the methodology is applicable to other types of MDR devices. Conclusion: The compressibility of MR fluid is one of the main reasons for the hysteretic characteristics of MRD. The proposed simulation and optimization methods can effectively improve the MRD’s damping performance in the design stage.

scholarly journals Diagnostics of supercapacitors

2018 ◽  
Vol 182 ◽  
pp. 01009 ◽  
Author(s):  
Valeriy Martynyuk ◽  
Oleksander Eromenko ◽  
Juliy Boiko ◽  
Tomasz Kałaczyński
Keyword(s):  
Mathematical Model ◽  
Mathematical Models ◽  
Methodological Approach ◽  
Frequency Dispersion ◽  
Technical Condition ◽  
Transient Processes ◽  
Nonlinear Frequency ◽  
Diagnostic Reliability ◽  
General Reliability ◽  
The Mathematical Model

The paper represents the mathematical model for diagnostics of supercapacitors. The research objectives are the problem of determining a supercapacitor technical condition during its operation. The general reliability of diagnostics is described as the methodological and instrumental reliabilities of diagnostics. The instrumental diagnostic reliability of supercapacitor includes the probabilities of errors of the first and second kind, α and β respectively. The methodological approach to increasing the reliability of supercapacitor diagnostic has been proposed, in terms of multi-parameter supercapacitor diagnostic by applying nonlinear, frequency dependent mathematical models of supercapacitors that take into account nonlinearity, frequency dispersion of parameters and the effect of transient processes in supercapacitors. The more frequencies, operating voltages and currents are applied in the supercapacitor diagnostics, the more methodological reliability of diagnostics will increase in relation to the methodological reliability of supercapacitor diagnostics when only one frequency, voltage and current are applied.

SIMULATION MODEL OF TECHNOLOGICAL MINERAL DRESSING PROCESSES

2012 ◽  
Vol 03 (03) ◽  
pp. 1250008
Author(s):  
VAN CHI NGUYEN ◽  
A. V. PETROV
Keyword(s):  
Simulation Model ◽  
Economic Efficiency ◽  
Design Stage ◽  
Graph Method ◽  
Control Information ◽  
Structural Graph ◽  
Effective Instrument ◽  
Plant Simulation ◽  
And Control ◽  
Operating Plant

The authors worked out a simulation model of technological mineral dressing processes, in which two simulations of technological mineral dressing processes methods are used: transformed structural graph method and method of separation characteristics. The first method makes it possible to simulate technological mineral dressing processes at the design stage in conditions of feedstock, equipment and control information shortage. The second method is an effective instrument for operating plant simulation at the reengineering stage. Productivity and economic efficiency evaluations of the mineral dressing plant are appended to the model.

RESEARCH OF RELIABILITY AT THE DESIGN STAGE OF COMPLEX TECHNICAL SYSTEMS

2020 ◽  
pp. 1-20
Author(s):  
V. M. Trukhanov ◽  
S. S. Basova ◽  
G. V. Trukhanov ◽  
G. I. Kuprovskiy
Keyword(s):  
Mathematical Models ◽  
Present Article ◽  
Design Stage ◽  
Calculation Methods ◽  
Reliability Indices ◽  
Design Reliability ◽  
Complex Technical Systems ◽  
Technical Systems

The issues of nomenclature choice of reliability indices and methods of reliability distribution between components of product have been considered in the present article. Calculation methods of design reliability of expensive nondiscarding objects like movable mountings and also mathematical models of design reliability, which taking into account random and nonrandom failures. The technique of calculation and achievement of required level reliability has been represented.

135 Damping characteristics of bridge with newly developed vibration control

2004 ◽  
Vol 2004 (0) ◽  
pp. _135-1_-_135-6_
Author(s):  
Toru OKADA ◽  
Koichi Honke ◽  
Katsunori Yasuda ◽  
Yoshikazu Shimizu ◽  
Takeshi Abe ◽  
...  
Keyword(s):  
Vibration Control ◽  
Damping Characteristics

scholarly journals A Review Predictive Mathematical Modeling of Alkali-Silica Reaction in Concrete: evolution, current understanding and the knowledge gaps

2021 ◽  
Vol 10 (11) ◽  
pp. e449101119810
Author(s):  
Dhiego Henrique Ferreira Revoredo ◽  
Ana Cecília Vieira Nobrega ◽  
Arnaldo Manoel Pereira Carneiro ◽  
João Emanuell Araújo Marciano
Keyword(s):  
Mathematical Modeling ◽  
Literature Review ◽  
Mathematical Models ◽  
State Of The Art ◽  
Meta Analysis ◽  
Methodological Approach ◽  
Phenomenological Approach ◽  
Alkali Silica Reaction ◽  
Long Time ◽  
Concrete Degradation

Predictive mathematical models have been proposed in alkali-silica reaction (ASR). Predicting concrete degradation and its effects on mechanical properties is of interest given the long time until degradation becomes critical for intervention and recovery, and difficult structural access for predictive and corrective monitoring and treatment. The present paper presents a general overview of the evolution of the aforementioned predictive mathematical models, interrelating them to the maturation of the phenomenological state of the art associated with ASR.  For this purpose, a systematic literature review was used, followed by bibliometric analysis and meta-analysis. In this study, 104 articles from 1974 to 2020 were selected, of which 31 articles were reviewed on the topic of mathematical modeling of ASR. The results of the method indicated the importance of the methodological approach of literature review to provide a comprehensive and chronological view of the evolution of ASR consolidated in the literature. It was found that the mathematical models have evolved considering the phenomenological approach of ASR.

Modelling and Analysis of Dynamic Properties of Drive Systems With Gears

1999 ◽  
Author(s):  
Ctirad Kratochvíl ◽  
Vladimír Kotek ◽  
Tomáš Březina ◽  
Jiří Krejsa
Keyword(s):  
Mathematical Models ◽  
Dynamic Analysis ◽  
Dynamic Properties ◽  
Structural Complexity ◽  
Design Stage ◽  
Drive Systems ◽  
Marked Tendency

Abstract Contemporary trends show a marked tendency for solution of problems of dynamic analysis of drive systems as early as the design stage. It shows that during the modelling of complex drive systems it is necessary to respect its structural complexity and therefore it is necessary to make the models of particular drive subsystems first and then to combine it altogether. In the paper authors present some methods of creation of suitable mathematical models of complex drive systems respecting the drive structure. The methods are then applied onto real tasks. Examples are included.

METHODOLOGICAL APPROACH TO FORECASTING THE COSTS OF CREATING AN AUTOMATED RATING SYSTEM

2021 ◽  
Vol 2 (10) ◽  
pp. 21-26
Author(s):  
Anastasia S. Krasnikova ◽  
◽  
Alexander G. Podolsky ◽  
Keyword(s):  
Mathematical Models ◽  
Methodological Approach ◽  
Rating System ◽  
Automated System ◽  
Factors Affecting ◽  
Planning Decisions ◽  
Main Factors ◽  
The Cost

The article presents a methodological approach to forecasting the costs of creating an auto-mated rating system, which allows taking into account the costs of development, production and installation of its components. Economic and mathematical models are presented that take into account the main factors affecting the cost of creating components of an automated system, allowing to obtain adequate forecast esti-mates for making informed planning decisions.

Sign in / Sign up

Export Citation Format

Share Document