scholarly journals Algorithm for controlling the process of buffer wastewater neutralization

2021 ◽  
pp. 27-35
Author(s):  
Anatolii Zhuchenko ◽  
Ruslan Osipa ◽  
Liudmyla Osipa ◽  
Lesia Ladieva
Keyword(s):  
Control System ◽  
Process Control ◽  
Control Systems ◽  
Block Diagram ◽  
Domestic Wastewater ◽  
Automated Control ◽  
Diagram Method ◽  
Industrial Enterprises ◽  
Treatment Facilities

In Ukraine, the condition of surface water near industrial enterprises is extremely critical. The operation of enterprises leads to intensive water pollution with industrial and domestic wastewater. Therefore, improving the quality of treatment facilities through the introduction of automated control systems is an urgent problem. For the operation of automated control systems for typical cleaning processes, a software package is required, which is developed on the basis of appropriate algorithmic software and mathematical models of processes. To obtain them, methods of mathematical and simulation modeling and block diagram method of algorithmization were used. In order to assess the quality of the developed algorithm for controlling the process of buffer wastewater neutralization during operation, a comparison of control system operation based on this algorithm with the most successful foreign variants of neutralization control systems was made. Simulation for the average values of operating parameters Q = 75 m3 / h, CP = 75 g / l, and Ck = 2 g / l at minimum b = 0.02 g / l pH and maximum buffer value b = 0.47 g / l pH, and also with  unidirectional extreme combination of parameters Q = 50 m3 / h, CP = 100 g / l, b = 0,02 g / l pH and Q = 100 m3 / h, CP= 50 g / l, for minimum b = 0.02 g / l pH and maximum buffering value  b = 0.47 g / l pH shows that the best quality of transient processes is for the control system operating on the basis of the developed algorithm. For any combination of parameters, the transients for this control system provide better quality transients. Studies have shown that the control system based on the developed algorithm in comparison with the previously proposed systems provides better process control by reducing the time of transients and reducing the dynamic deviation of the output parameters, which improves the quality of wastewater treatment. Given the non-stationary process and high requirements for the cleaning parameters, manual control of this process is beyond the power of even an experienced operator. The developed mathematical model describing the dynamics of the wastewater neutralization reactor with buffer properties and the process control algorithm made it possible to proceed to the development of the control system software, which is necessary for the automated control of this process.

scholarly journals DEVELOPMENT OF A SYSTEM FOR AUTOMATED CONTROL OF THE BRICK FIRING PROCESS IN A RING FURNACE

2020 ◽  
pp. 5-11
Author(s):  
А. У. Тахгириев ◽  
А. С-С. Хамзаев ◽  
У. А. Вагапов
Keyword(s):  
Control System ◽  
Block Diagram ◽  
Process Control System ◽  
Firing Process ◽  
Development Environment ◽  
Automated Control ◽  
Automated Control System ◽  
Automated Process Control System ◽  
Ring Furnace

В данной статье приводится описание технологического процесса обжига керамического кирпича в кольцевой печи Гофмана. Проанализирован существующий уровень автоматизации объекта. Приведено обоснование для внедрения автоматизированной системы управления процессом обжига кирпича и вариант структурной схемы системы автоматизированного управления. Также представлены основные характеристики интегрированной среды разработки SIMPLE-SCADA, выбранной для организации операторского уровня автоматизированной системы управления технологическим процессом. Для определения показателей качества системы определены прямые и косвенные оценки качества функционирования системы управления. This article describes the technological process of firing ceramic bricks in a ring Hoffmann furnace. The existing level of object automation is analyzed. The justification for the introduction of an automated control system for the brick firing process and a variant of the block diagram of the automated control system is given. The main characteristics of the integrated development environment SIMPLE-SCADA, selected for the organization of the operator level of the automated process control system, are also presented. To determine the quality indicators of the system, direct and indirect assessments of the quality of the management system are determined.

scholarly journals TO THE QUESTION OF BUILDING PRECEDENTIAL CONTROL SYSTEMS BASED ON SUPPORT-DISTURBED MOVEMENT

2019 ◽  
pp. 17-24
Author(s):  
Mikhail Yurievich Gudkov ◽  
Alexey Sergeyevich Dobrynin ◽  
Alexander Sergeyevich Koynov
Keyword(s):  
Control System ◽  
Process Control ◽  
Control Systems ◽  
Integrated Management ◽  
Control Object ◽  
Process Control System ◽  
Automated Control ◽  
Quality Of Control ◽  
Communication Devices ◽  
Technological Object

The article considers the problem of the modern automated control systems which operate in the difficult conditions of constantly changing multi-factorial effects of the environment. Such systems should be considered as multi-mode, non-stationary human-technical systems, since they realize the integrated management of a complex technological object. As a rule, these systems are influenced by both environmental factors and complex man-machine mechanisms and technical means (such as communication devices with an object, programmable controllers - PLC), which constitute the control infrastructure, which ultimately leads to additional complexity and errors, additional management problems and reduced overall management quality. The approach to building an automated process control system is claimed to be based on using reference libraries and control algorithms (precedents), which are selected depending on the changing environmental conditions and the assets used, as well as on the logistics support. Despite the use of modern software and hardware in many systems, such as PLC, very often the quality of control leaves much to be desired. This is due to the fact that the control object changes over time for various reasons, and the control algorithm remains unchanged, which leads to a decrease in the efficiency of functioning of such systems. The generalized structure of the precedent process control system is described, which highlights the approach to the control of a technological object within the framework of the well-known concept of support-disturbed movement, which is suitable for building robust control systems for technological objects with substantial nonstationarity.

scholarly journals Statics simulation of the sulphate iron-containing wastewater neutralization process

2021 ◽  
pp. 15-21
Author(s):  
Anatolii Zhuchenko ◽  
Ruslan Osipa ◽  
Liudmyla Osipa ◽  
Dmytro Kovaliuk
Keyword(s):  
Mathematical Model ◽  
Wastewater Treatment ◽  
Control System ◽  
Control Systems ◽  
Ferrous Sulfate ◽  
Technological Systems ◽  
Automated Control ◽  
Initial Concentration ◽  
Neutralization Process

At the present stage of technical progress, all industries face an extremely complex problem of creating reliable barriers that prevent the penetration of industrial emissions into the environment. Currently, the issues of stabilizing the quality of wastewater treatment have become especially important in connection with the task of developing wastewater-free industrial complexes. Among the complex scientific and technical problems associated with this task, the problem of stable and reliable maintenance of water quality parameters at the outlet of technological systems is crucial, as leakage of pollutants immediately affects the state of basic production, disrupting its technology and infecting ecosystems. The focus of industry on a sharp reduction in emissions and on the creation of industrial cycles with circulating water supply requires intensive efforts to improve the wastewater treatment technology, the introduction of high-performance processes and devices, as well as the synthesis of control systems for typical wastewater treatment processes. For the performance of automated control systems for typical cleaning processes, it is necessary to develop a software package on the basis of appropriate mathematical models of typical processes. To obtain them, methods of mathematical and simulation modeling and variance analysis were used. In order to assess the quality of modeling, the presented mathematical model describing the statics of the neutralization process for ferrous sulfate water was tested for compliance. To do this, two experiments were performed (the first at an initial concentration of sulfuric acid of 800 [mg/l] and ferrous sulfate of 4000 [mg/l] and the second at an initial concentration of sulfuric acid of 800 [mg/l] and ferrous sulfate of 2000 [mg/l]). First of all, a precondition for the reproducibility of experimental results was verified using the Cochrane test. The mathematical model was verified for adequacy on the basis of Fisher's criterion for the significance level q = 0.05 with degrees of freedom j1 = 16 and j2 = 17. For the first experiment, Grozr = 0.50557 and Gmab = 0.73; i.e., Grozr < Gmab and dispersions are homogeneous. Frozr = 1.0225 and Fmab = 2.4 and thus Frozr < Fmab, and there is no reason to say that the model is inadequate. For the second experiment, Grozr = 0.50308 and Gmab = 0.73; i.e., Grozr < Gmab and dispersions are also homogeneous. Frozr = 1.0005 and Fmab = 2.4 and thus Frozr < Fmab, which also indicates that the model is adequate. The issue related to the performance of technological systems for wastewater treatment in non-stationary modes is directly dictated by the specific operating conditions of treatment facilities, which are expressed by the instability of parameters at their inlet. The inability to apply the necessary technological action to the flow in time is a serious obstacle to the implementation of the cleaning depth, which is guaranteed by the physicochemical basis of the methods incorporated in technological systems and requiring cleaning standards. The operator cannot handle this complex task manually. On the basis of the proposed mathematical model, a structural-parametric diagram of the automated process control system has been developed, which makes it possible to proceed to the elaboration of algorithms and software for the control system necessary for automated control of the wastewater treatment process.

scholarly journals Methodology of software development for artificial microclimate control systems

2020 ◽  
pp. 21-31
Author(s):  
Ihor Golinko ◽  
Pavlo Gikalo
Keyword(s):  
Control System ◽  
Software Development ◽  
Control Systems ◽  
Mass Exchange ◽  
Air Conditioning ◽  
Block Diagram ◽  
Dew Point ◽  
Program Logic ◽  
Air Conditioners ◽  
Exchange Processes

The specificity of accelerated software development for microcontrollers is considered. The software development technique for a program-logic controller is presented on the example of an algorithm for controlling the industrial premises microclimate. The method of “dew point” for the control system of industrial air conditioning. The analysis of the functioning of the control system of industrial air conditioning according to the “dew point” method has been carried out and a block diagram of the control system of an artificial microclimate has been proposed. Structurally, the mathematical description of an artificial microclimate system is presented, which takes into account the nonlinearity of mass-exchange processes of air preparation. It can be used by specialists to implement computer-integrated technologies and to analyze and adjust the parameters of the control system of industrial air conditioners.

scholarly journals Model of an intelligent control system for an irrigation complex

2021 ◽  
pp. 103-108
Author(s):  
Dmitry Aleksandrovich Solovyev ◽  
Galina Nickolaevna Kamyshova ◽  
Dmitry Alexandrovich Kolganov ◽  
Nadezhda Nickolaevna Terekhova
Keyword(s):  
Control System ◽  
Control Systems ◽  
Intelligent Control ◽  
Process Automation ◽  
Automated Control ◽  
Simple Process ◽  
Intelligent Control System ◽  
Irrigation Technologies ◽  
Traditional Approaches ◽  
Precision Irrigation

The article presents the results of modeling an intelligent control system for an irrigation complex. The introduction of precision irrigation technologies requires the development of new approaches to technical support. Traditional approaches based on simple process automation often do not lead to effective solutions. An approach based on the model of intellectualization of automated control systems is proposed. The structure of the intelligent control system for the irrigation complex is substantiated, which is based on an artificial neural network.

Probabilistic model of functioning of an automated control system for electrical equipment of industrial enterprises in Vietnam in the event of an accident

2021 ◽  
Vol 93 ◽  
pp. 199-207
Author(s):  
N. G. Topolsky ◽  
◽  
E. A. Meshalkin ◽  
E. N. Mineev ◽  
Nguyen Le Duy ◽  
...  
Keyword(s):  
Control System ◽  
Fire Safety ◽  
Electrical Equipment ◽  
Residual Current ◽  
Automated Control ◽  
Industrial Facilities ◽  
Industrial Enterprises ◽  
Risk Of Injury ◽  
Automated Control System ◽  
Degree Of Risk

Introduction. Ensuring fire safety of industrial facilities depends on how correctly the automated systems for detecting and extinguishing a fire are selected, how quickly and efficiently the necessary preventive measures are taken to minimize the likelihood of a fire and damage from it. Assessment of the degree of risk of injury to people and damage caused by accidents is associated with the task of predicting the indicators of reliability and residual life of a functioning system. The most important issue is the establishment of the permissible periods for the further operation of residual current devices at a specific value of the risk of an accident. One of the features of industrial facilities is the presence of a large number of electrical equipment that creates the risk of major accidents accompanied by fires and explosions. Timely detection of the pre-fire state of electrical equipment is ensured through the use and development of an automated control system for electrical equipment. Goals and objectives. Assessment of the degree of risk of injury to people and damage to them in case of accidents when predicting reliability indicators in an automated control system for electrical equipment. Methods. To obtain the results, general scientific and special methods of scientific knowledge were used: analysis, synthesis, generalization, which were based on the provisions of the theory of probability, the theory of reliability. Research results. An assessment of the occurrence of an emergency is carried out based on elementary statistics and discrete Poisson distribution. Conclusions. The use of an automated control system for electrical equipment upon detection of leakage currents allows increasing the level of fire safety of industrial enterprises, as well as determining the life cycle of residual current devices during its operation. Keywords: accident, analysis, fire, explosion, risk, statistics, reliability, electrical equipment

Reducing the Impact of Source Information Uncertainty in Intelligent Automated Thermal Process Control Systems in Ensuring Reliable Operation of Power Equipment

Vestnik MEI ◽  
2021 ◽  
Vol 3 (3) ◽  
pp. 78-87
Author(s):  
Edik K. Arakelyan ◽  
◽  
Ivan A. Shcherbatov ◽  
Keyword(s):  
Control System ◽  
Process Control ◽  
Control Systems ◽  
Process Control System ◽  
Power Equipment ◽  
Source Information ◽  
Equipment Operation ◽  
Process Control Systems ◽  
Automated Process ◽  
The Impact

The uncertainty of the source information is used to solve key tasks in an intelligent automated thermal process control system affects the calculation of control actions, the implementation of equipment optimal operating modes and, as a result, leads to degraded reliability. As a rule, this type of information can be qualitative (the use of expert knowledge) or quantitative in nature. In this regard, it is extremely important to reduce the impact of uncertainty. The aim of the study is to identify the types and origins of uncertainty in the source information used by an intelligent automated process control system and to develop approaches to reduce its impact on the reliability of power equipment operation. The approaches used to ensure the specified indicators of reliability, efficiency and environmental friendliness in modern intelligent automated process control systems are based on predictive strategies, according to which the technical condition of equipment and specific degradation processes are predicted. This means that various types of uncertainty can have a significant negative impact. To reduce the influence of uncertainty of the initial information that affects the reliability of power equipment operation, the use of artificial neural networks is proposed. Their application opens the possibility to predict the occurrence of equipment defects and failures based on retrospective data for specified forecast time intervals. A method for reducing the impact of anomalies contained in the source information used in an intelligent process control system for energy facilities is demonstrated. Data omissions and outliers are investigated, the elimination of which reduces the impact of uncertainty and improves the quality of solving key problems in intelligent automated process control systems. Experimental studies were carried out that made it possible to identify the mathematical methods for removing omissions and anomalies in the source information in the best way. Methodological aspects of eliminating various types of uncertainty that exist in managing of power facilities by means of intelligent automated process control systems at the key stages of the power equipment life cycle are described.

More from the Mill

2000 ◽  
Vol 122 (10) ◽  
pp. 82-87
Author(s):  
Michael Valenti
Keyword(s):  
Cold Rolling ◽  
Control Systems ◽  
Rolling Mill ◽  
Space Shuttle ◽  
State Of The Art ◽  
Steel Strip ◽  
Cold Rolling Mill ◽  
Automated Control ◽  
The World

This article focuses on the launch of Sputnik that transfixed the world by Carpenter Technology Corp. By incorporating advanced processing equipment, including a rolling mill, shape controller, annealing furnaces, wet grinders, and leveler with state-of-the-art automated control systems, Carpenter has improved the productivity and quality of its high value strip at a time when Space Shuttle launchings are taken in stride. The Carpenter specialty strip facility installed a cold rolling mill designed by Joseph Frohling GmbH of Olpe, Germany, in November last year, to increase rolling capacity and guarantee that the steel strip it produces meets the desired shape and thickness. In the Frohling mill, strip passes between two working rolls that reduce its thickness to sizes between 0.150 and 0.008 inch, at speeds up to 1500 feet per minute. Carpenter also installed three Ebner vertical annealing furnaces. Coiled strip on mandrels is unwound through each furnace, annealed, then rewound continuously to promote productivity.

Creation of Fuzzy Control Table with Data Mining

2013 ◽  
Vol 760-762 ◽  
pp. 1080-1083
Author(s):  
Jun Gao
Keyword(s):  
Data Mining ◽  
Control System ◽  
Fuzzy Control ◽  
Control Systems ◽  
Association Rule ◽  
New Method ◽  
Data Mining Techniques ◽  
Fuzzy Control System

A good fuzzy control table is the key to a fuzzy control system, and the systems performance mainly depends on the quality of the table. Based on analyzing fully the principles of a typical fuzzy control systems and the procedures of building a fuzzy control table, this paper presents a new method of applying the boolean association rule data mining techniques to mining of fuzzy control table directly from the database of manual operating records.

INTERVAL LOGIC FOR PROCESS CONTROL SYSTEM SPECIFICATION

1991 ◽  
Vol 01 (03) ◽  
pp. 303-326
Author(s):  
PETER P.K. CHIU ◽  
Y.S. CHEUNG
Keyword(s):  
Control System ◽  
Process Control ◽  
Control Systems ◽  
Process Control System ◽  
Time Interval ◽  
System Specification ◽  
Time Intervals ◽  
Process Control Systems ◽  
Sequential Processes ◽  
Interval Logic

A new methodology for the specification of process control systems involving time interval information and verification of their design is proposed. The specification is based on interval logic and a time-interval operator is defined. By means of this operator, time interval information is incorporated in the specification. Thus properties that involve time intervals can be verified. Moreover, combinational and sequential processes can be specified. An application example for a process control system is demonstrated.

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