scholarly journals Automatic method of the technical state changes model generation

2021 ◽  
Vol 351 ◽  
pp. 01001
Author(s):  
Michał Pająk
Keyword(s):  
Technical State ◽  
Technical Diagnostics ◽  
Model Generation ◽  
Automatic Method ◽  
Operational Parameters ◽  
Operation Process ◽  
Time Histories ◽  
Complex Technical System ◽  
State Changes ◽  
Real Complex

One of the main objectives of technical diagnostics is identification the technical state of the machine. The technical state is described by the values of the object cardinal features. Unfortunately, during the operation process, some of the values of these features cannot be measured. It is proposed to estimate the values of the cardinal features based on their initial values and the influence of the forcing factors described by the time histories of the parameters of the operation process. Due to the limited knowledge of the correlation between operational parameters and forcing factors it was modelled in form of fuzzy Mamdani models. In the paper universal automatic method of the models generation was presented. Thanks to it, it was possible to generate the model of the technical state changes in automatic manner. The results of the usage of the generated model in case of real complex technical system can be found at the end of the paper.

scholarly journals Identification of the operating parameters of a complex technical system important from the operational potential point of view

2017 ◽  
Vol 232 (1) ◽  
pp. 62-78 ◽  
Author(s):  
Michał Pająk
Keyword(s):  
Point Of View ◽  
Technical System ◽  
Technical State ◽  
Universal Method ◽  
Operational Parameters ◽  
State Evaluation ◽  
Evaluation Point ◽  
Time Histories ◽  
Complex Technical System ◽  
Operational Potential

The most important processes which take place in a technical system are the operation and service processes. Knowing the actual technical state of the system, it is possible to make a decision whether the system can operate or should be serviced. The efficiency of the system operation and the possibility of the failure occurrence strongly depend on the relevancy of this decision. The technical state of the system is described by the system features affected by the time histories of its operational parameters. Unfortunately, the amount of the operational parameters can be significant. Therefore, it becomes purposeful to identify the operational parameters significant from the system technical state evaluation point of view. In the article, the universal method of the significant operational parameters identification and the research carried out in a real industrial system to verify its correctness and the accuracy are presented.

scholarly journals FUZZY MODEL OF THE OPERATIONAL POTENTIAL CONSUMPTION PROCESS OF A COMPLEX TECHNICAL SYSTEM

2020 ◽  
Vol 18 (3) ◽  
pp. 453
Author(s):  
Michał Pająk
Keyword(s):  
Fuzzy Model ◽  
Technical System ◽  
Technical State ◽  
Model Quality ◽  
Operation Process ◽  
Time Histories ◽  
Complex Technical System ◽  
Working Parameters ◽  
The Impact ◽  
Operational Potential

During the operation process of a system its technical state is changed. The changes take place because of the wearing factors impact. The impact depends on the flow and intensity of the operation process what is characterized by the time histories of the working parameters. Simultaneously, the changes of the technical state are correlated with the changes of the amount of the operational potential included in a system. In order to avoid the inability state occurrence the amount of this potential should be higher than the boundary value. The amount of the operational potential included in a system is determined by the values of the cardinal features of it but in the case of the real technical system the values cannot always be measured. Therefore, the amount of the operational potential and the technical state of the system cannot always be determined online. To solve this problem the model of the operational potential consumption process was created and presented in the paper. The model uses artificial intelligence techniques to calculate the change of the operational potential amount by determining the changes of the cardinal features of the system on the basis of the time histories of the working parameters. The verification of the model quality was performed using the pulverized boiler OP-650k-040 operating in the power plant. The description of the conducted research and the results of the verification were presented in the end of the paper proving the adequacy of the model implementation in the case of industrial objects.

MEASURE COMPLEX SUPPORTING SAFETY AND EFFECTUVE OPERATION OF MUNICIPAL BUSES UNDER WINTER CONDITIONS

2020 ◽  
Vol 2020 (10) ◽  
pp. 37-41
Author(s):  
Sergey Bulatov
Keyword(s):  
Residual Life ◽  
Technical State ◽  
Manufacturing Equipment ◽  
Winter Conditions ◽  
On Line ◽  
State Changes ◽  
The City

The effectiveness of manufacturing equipment use taking into account its productivity and reliability for faulty parts of transmission units in municipal buses is estimated. The on-line mode is the most effective method of control allowing the tracking of the processes of technical state changes in municipal buses. As a result of monitoring there were obtained selected data on PAZ-3205 municipal bus operated under winter conditions in the city of Ohrenburg. During the trip there was recorded 39.1 l/100km petrol consumption. The residual life of the PAZ-3205 municipal bus was 1800km.

“Analysis of pesticide residues in fruits and vegetables using gas chromatography-high resolution time-of-flight mass spectrometry”

2015 ◽  
Vol 7 (5) ◽  
pp. 2162-2171 ◽  
Author(s):  
Noelia Belmonte Valles ◽  
Samanta Uclés ◽  
Natalia Besil ◽  
Milagros Mezcua ◽  
Amadeo R. Fernández-Alba
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
High Resolution ◽  
Pesticide Residues ◽  
Fruits And Vegetables ◽  
Time Of Flight ◽  
Automatic Method ◽  
Operational Parameters ◽  
Resolution Time ◽  
Flight Mass Spectrometry

This work reports a study on the operational parameters and development of a rapid automatic method for determining pesticide residues in fruit and vegetables using gas chromatography-high resolution time-of-flight mass spectrometry.

Applied Problems of Marine Mechanical Systems Technical Condition Estimation

2017 ◽  
Author(s):  
Неменко ◽  
Aleksandra Nemenko ◽  
Никитин ◽  
Mihail Nikitin
Keyword(s):  
Mathematical Modeling ◽  
Time Series ◽  
Mechanical Systems ◽  
Technical Condition ◽  
Technical Diagnostics ◽  
Operational Parameters ◽  
Physical Processes ◽  
Minimum Loss ◽  
Condition Estimation

We consider the problems of technical diagnostics of marine mechanical systems such as machinery and other mechanisms. We propose effective techniques of mathematical modeling concerning physical processes during operation of these systems, machines and mechanisms. We describe algorithms of time series far forecast for operational parameters, ways of time series composition with minimum loss of accuracy and application of all of this for the prevention of breakdowns and other accidents.

Vibrations in the Assessment of Construction State

2014 ◽  
Vol 617 ◽  
pp. 136-141 ◽  
Author(s):  
Bogdan Żółtowski ◽  
Mariusz Żółtowski
Keyword(s):  
Modal Analysis ◽  
Technical State ◽  
Dynamic State ◽  
Dynamic Evolution ◽  
Technical Diagnostics ◽  
System Behavior ◽  
Evolution Time ◽  
State Evaluation ◽  
State Diagnosis

The knowledge of the dynamic state and structure of the system allows to describe its behavior, and allows creating prognosis models of the system behavior in the function of dynamic evolution time, based on the model of the technical state symptoms growth. Most often, however, there are no known equations describing behaviors of the system in the function of dynamic evolution time, which accounts for the need to apply new tools to examine the dynamic state. There is, therefore, the requirement to experimentally verify analytical technical models as the proper one is a model which is verified in practice. An experiment is, therefore, often only an inspiration for further researches leading to the optimization of the construction. In this work presented are chosen problems of machines’ technical state diagnosis with the use of identification and technical diagnostics methods. Relations between methods of dynamic state evaluation and methods of technical state evaluation were indicated. Example modal analysis results illustrate the complexity of projecting dynamic state researches into diagnostic researches of machine state evaluation.

scholarly journals Computer Simulation in Predicting Biochemical Processes and Energy Balance at WWTPs

2018 ◽  
Vol 30 ◽  
pp. 03007 ◽  
Author(s):  
Jakub Drewnowski ◽  
Ewa Zaborowska ◽  
Carmen Hernandez De Vega
Keyword(s):  
Computer Simulation ◽  
Energy Balance ◽  
Biogas Production ◽  
Pollutant Emissions ◽  
Actual Process ◽  
Operational Parameters ◽  
Biochemical Processes ◽  
Batch Tests ◽  
Operation Process ◽  
And Control

Nowadays, the use of mathematical models and computer simulation allow analysis of many different technological solutions as well as testing various scenarios in a short time and at low financial budget in order to simulate the scenario under typical conditions for the real system and help to find the best solution in design or operation process. The aim of the study was to evaluate different concepts of biochemical processes and energy balance modelling using a simulation platform GPS-x and a comprehensive model Mantis2. The paper presents the example of calibration and validation processes in the biological reactor as well as scenarios showing an influence of operational parameters on the WWTP energy balance. The results of batch tests and full-scale campaign obtained in the former work were used to predict biochemical and operational parameters in a newly developed plant model. The model was extended with sludge treatment devices, including anaerobic digester. Primary sludge removal efficiency was found as a significant factor determining biogas production and further renewable energy production in cogeneration. Water and wastewater utilities, which run and control WWTP, are interested in optimizing the process in order to save environment, their budget and decrease the pollutant emissions to water and air. In this context, computer simulation can be the easiest and very useful tool to improve the efficiency without interfering in the actual process performance.

scholarly journals Integrated model of port oil piping transportation system safety including operating environment threats

2017 ◽  
Vol 42 (1) ◽  
pp. 131-142
Author(s):  
Krzysztof Kołowrocki ◽  
Ewa Kuligowska ◽  
Joanna Soszyńska-Budny
Keyword(s):  
General Model ◽  
Transportation System ◽  
Integrated Model ◽  
Technical System ◽  
Operating Environment ◽  
System Safety ◽  
Safety Function ◽  
Operation Process ◽  
Safety Parameters ◽  
Complex Technical System

Abstract The paper presents an integrated general model of complex technical system, linking its multistate safety model and the model of its operation process including operating environment threats and considering variable at different operation states its safety structures and its components safety parameters. Under the assumption that the system has exponential safety function, the safety characteristics of the port oil piping transportation system are determined.

scholarly journals Frequency response function shape differences as a sign of bricks elements destruction diagnostics

2021 ◽  
Vol 332 ◽  
pp. 01021
Author(s):  
Mariusz Żółtowski ◽  
Raimondas Šadzevičius
Keyword(s):  
Modal Analysis ◽  
Frequency Response Function ◽  
Technical State ◽  
Dynamic State ◽  
Dynamic Evolution ◽  
Technical Diagnostics ◽  
System Behavior ◽  
Evolution Time ◽  
State Evaluation ◽  
State Diagnosis

The knowledge of the dynamic state and structure of system allows describing its behavior and allows creating prognosis models of the system behavior in the function of dynamic evolution time, based on the model of the technical state symptoms growth. Most often, there are no known equations describing behaviors of the system in the function of dynamic evolution time, which accounts for the need to apply new tools to examine the dynamic state. In this article authors shows chosen problems of technical state diagnosis with the use of identification and technical diagnostics methods such as experimental modal analysis. Relations between methods of dynamic state evaluation and methods of technical state evaluation were indicated. Example modal analysis results illustrate the complexity of projecting dynamic state researches into diagnostic researches of state evaluation.

scholarly journals A Method for Determining the Usability Potential of Ship Steam Boilers

2016 ◽  
Vol 23 (4) ◽  
pp. 105-111 ◽  
Author(s):  
Łukasz Muślewski ◽  
Michał Pająk ◽  
Bogdan Landowski ◽  
Bogdan Żół Żółtowski
Keyword(s):  
Technical System ◽  
Steam Boiler ◽  
Operational Parameters ◽  
Large Power ◽  
System A ◽  
Steam Boilers ◽  
Operational Decision Making ◽  
Complex Technical System ◽  
Rational Control ◽  
Operational Processes

Abstract Ship large-power steam boiler may serve as an example of complex critical technical system. A basis for rational control of operation of such system is knowledge on its capability of fulfilling the tasks to which it was intended. In order to make it possible to apply computer aiding to operational decision-making the capability should be described analytically. In this paper it was proposed to express the capability of ship steam boiler ( considered a complex system) to perform service tasks, by calculating components of its usability potential in a given instant t. To this end , was distinguished a set of steam boiler fundamental features which formulate space of its technical states. Values and characteristic intervals of the features were defined and this way sub-spaces of serviceability and non-serviceability states of the object in question were determined. Next, in the considered space, technical state of the boiler and its usability potential was determined. Owing to this it become possible to quantitatively express the steam boiler functioning capability which served as a basis for elaborating an algorithm for controlling the operational processes of a complex technical system under action. In this paper is also described a way of application of the presented method to calculation of ship steam boiler usability potential, which may be especially instrumental in the case of operational control of the boilers of the kind , equipped with interstage reheaters, i.e. those operating with high values of operational parameters.

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