Process Control and Systems Commons^™

Mathematical Modeling Of Processes Of Diagnostics Of Technical And Technological Objects, Azizbek Nodirbekovich Yusupbekov, Khurshid Salim Ugli Turayev

Chemical Technology, Control and Management

The work is an introduction to the technical diagnostics of technical (or technological) objects. It discloses the basic concepts and definitions of the reliability of dynamic systems as objects of diagnostic reference knowledge and their diagnosis. Structural schemes of diagnosing objects with individual and combined channels of influence are analyzed. Questions of rational construction of base of reference knowledge are stated.

Uncertainty Of The Ultrasonic Method For Determining The Strength Of Concrete, Ortagoli Sharipovich Hakimov, Zamira Khudoyberdiyevna Ernazarova

Chemical Technology, Control and Management

The issues of measuring the strength of concrete by the method of surface sounding by ultrasound are considered. A measurement model and formulas for estimating the total standard measurement uncertainty, information about the standards used, measurement tools and methods, and environmental parameters are given. Information about the estimation of uncertainty in the form of "eight steps", such as: measurement task; mathematical model of measurement; analysis of input values; observation results; correlations; uncertainty budget; expanded uncertainty; measurement result. It has been established that the uncertainty of type B of the ultrasonic method for determining the strength of concrete is much less …

Quality Control Of Combustion Of Gaseous Fuel In Furnaces, Azamat Toirovich Rajabov

Chemical Technology, Control and Management

The issues of research and development of systems for monitoring the availability and quality of the process of fuel combustion in industrial furnaces are interpreted. The perspective of using new elements in control systems - communication sensors for the presence and quality in gas-burning installations and furnaces are shown. A method has been developed to control the optimal aeration coefficient based on the extreme of the total integral amplitude-frequency characteristic of the flame conductivity pulsations, which makes it possible to control the quality characteristics of gas-burner devices and control the ratio of the components of the combustible mixture with high …

Regular Algorithms For Adaptive Identification Of Linear Non-Stationary Systems, H.Z. Igamberdiyev, H.I. Sotvoldiev, U.F Mamirov

Chemical Technology, Control and Management

The article deals with the formation of regular algorithms for adaptive parametric spline identification of linear non-stationary systems. Analyzed the issues of constructing adaptive identification of continuous linear non-stationary systems with monotonic and sign-constant parameters. In this case, in a non-stationary system, the entire observation interval is in some way divided into sub-intervals. Identification is carried out at each of the parameter constancy intervals, while the parameter matrix is re-evaluated for the next interval. The input data of the system are determined with an error depending on the error of approximating the state of the system by splines and approximating …

Real-Time Monitoring Of Cell Death Progress Using Capacitance Spectroscopy, Suyang Wu

Electronic Theses and Dissertations

Biologics, including the monoclonal antibody (mAb), has experienced rapid development in the last decade. However, the price of biologics is often prohibitively high because of the low process efficiency. Delaying the inevitable cell death improves the productivity of upstream bioprocessing, whose success relies on monitoring the cell death onset that indicates the timing for preventive actions.

This study proposes to develop a real-time monitoring model that quantifies the dying cell percentage in lab-scale bioreactors using capacitance spectroscopy. The capacitance spectroscopy contains cell death-related information due to various physical properties changes during the cell death process, e.g., cytoplasmic conductivity change. The …

Control Of The Facial Design Process Of Innovative Developments, Yusuf Shodiyevich Avazov

Chemical Technology, Control and Management

The role and place of visual design in the process of creating an innovative development have been stated. It is shown that the tasks of the face stage of the product life cycle are devoted to systemic issues, in the center of which is the resolution of the contradiction between the desired and the achievable. The first is determined by the need to create a new system of a higher level, and the achievable is determined by the level of development of science, technology and production technology, as well as by the conditions of operation and repair. The work is …

Information Software And Devices For Energy Efficiency Management And Control, Narzullo Nuriddinovich Mirzoyev

Chemical Technology, Control and Management

The article provides information on modern methods of management and control of energy efficiency at industrial enterprises. This includes the software needed to manage and monitor energy efficiency, as well as the formation of a database. In addition, a structural diagram of an intelligent power monitoring system has been developed and its elements have been selected. Describes the principle of operation of an intelligent measuring device, its connection to the network, conversion of analog signals to digital, channels and ranges of signal transmission, metrological characteristics. The article details the capabilities and benefits of smart meters.

Control System Synthesis With Self-Adapting Regulator By Interactive Adaptation Method, Isamiddin Xakimovich Siddikov, Renata Nikolayevna Izmaylova

Chemical Technology, Control and Management

The research results on the creation of a self-adapting control system for a nonlinear dynamic object based on the theory of intelligent control using interactive adaptation methods have been presented. The lack of an accurate description and the nonlinearity of the dynamic properties of the object under study, the presence of mutual influence of cross communication channels in the control circuits, as well as the influence of various types of uncertainties associated with the lack of a priori information about the process, significantly complicate the solution of the problem of synthesis of highly efficient control systems for dynamic objects, which …

Analysis Of Water Treatment Methods For Circulating Water Supply In Industrial Plants, Djalolitdin Paxritdinovich Mukhitdinov, Nilufar Abdusomi Kizi Yunusova

Chemical Technology, Control and Management

This scientific paper deals with the problem of extracting Ca2+ and Md2+ salts from water in order to prevent the formation of scale on the heating surfaces of heat exchange equipment. The features, advantages and disadvantages of chemical, membrane and ion exchange methods of water treatment have been evaluated. It has been shown that the chemical method of water purification can be used only for the preparation of industrial water at large stations (at the same time, high residual hardness prevails in the water, the equipment has low productivity), and the membrane method requires pretreatment of water, creation of overpressure …

Algorithms For Modal Control Synthesis In Multi-Dimensional Dynamic System, Husan Zakirovich Igamberdiev, Jasur Usmonovich Sevinov, Oqila Husanovna Boyeva

Chemical Technology, Control and Management

Algorithms for the synthesis of modal control of a multidimensional dynamic system with concentrated parameters in the state space have been presented. The problems of modal control of a multidimensional dynamic system have been formulated for the case when the matrix representation of a closed system has a simple structure. The conditions for the solvability of the problem of modal control of a multidimensional dynamic system by means of output feedback have been obtained. To give numerical stability in the procedure of pseudo-circulation of matrices, it is proposed to use the concepts of regular methods in the form of scalar …

Ultrasonic Extraction Of Instant Forms Of Plant Substrates In Industrial Production, Shakhnoza Abduvaxitovna Sultanova, Jasur Safarov, Azamat Bakir O'G'Li Usenov, Doston Ishmuhammat Ogli Samandarov, Qobil Akmal Ogli Mukhiddinov

Chemical Technology, Control and Management

In recent years, both in our country and abroad, ultrasonic extraction methods have been increasingly used in industrial production, which is associated with the extraction of various substances and compounds from natural plant substrates. Domestic and foreign experience shows that this method has significant advantages over traditional methods and can significantly increase the efficiency and profitability of industrial enterprises, producing complete and functional food products.

This article discusses a brief theory of ultrasonic cavitation and the experience of extracting substrates from plants. Different results have been compared and analyzed.

Analysis Of Grain Product Drying Methods, Azizbek Nodirbekovich Yusupbekov, Dilmurod Egamberganov

Chemical Technology, Control and Management

Various drying methods and grain characteristics have been studied. The advantages and disadvantages of various grain drying methods were obtained. The use of the following methods of drying grain products is very useful for speeding up the drying process, reducing waste, achieving more flexible process management and delivering all the nutrients of dried grain and grain products to the subsequent production process. The technological approaches that increase the efficiency of high-quality production after drying grain products, the requirements for modern grain dryers have analyzed. The ways of overcoming the problem of high energy consumption in the process of drying grain …

Implementation Of Distance Learning At Universities Using The Experience Of The Honeywell Process Control Laboratory At Tashkent State Technical University, Nodirbek Rustambekovich Yusupbekov, Adilov Tulkunovich Farukh, Isakova Ismailovna Sitora

Chemical Technology, Control and Management

The experience of modernization of the Honeywell Process Control Laboratory at Tashkent State Technical University has been considered (which is equipped with upgraded equipment (simulators for simulating various technological processes, distance learning tools). As a result, the quality of the demonstration of process control mechanisms increased the availability of theoretical and practical knowledge in the field of automated control systems. They also considered the teaching methods necessary for a modern student – remote access in real time, when students pass a knowledge test, consult with teachers, etc.

Error Of Contactless Converters Of High Currents Of Monitoring And Control Systems From The Influence Of Currents Of Neighboring Buses, A.M. Plakhtiev, Gayratjon Gaziev, Y.A. Meliboev, O. Doniyorov

Chemical Technology, Control and Management

The article presents the general principles of construction of contactless ferromagnetic converters of large direct currents, the main requirements for them, and the results of the development of one of the developed wide-range magnetomodulation contactless converters of control and control systems concerning large electric power facilities. The developed converter, unlike the known ones, have a wide range of controlled currents, increased accuracy and sensitivity, a technological design, and small weight and dimensions at low material consumption and cost. The errors of contactless wide-range magnetomodulation converters from the influence of currents of neighboring buses connected by and the opposite direction are …

Implementation Of The Pid Control Law Of A Multidimensional Dynamic System, Khurshid Salim Ugli Turayev

Chemical Technology, Control and Management

Most industrial automation facilities are multi-circuit with a significant influence of cross-links between the goals. The paper develops a system for automatic parameter adjustment of a programmable logic controller that implements the proportional-integral-differential control law of a multidimensional dynamic object. The issues of decentralized management of multidimensional dynamic objects are discussed. The control system is based on the method of independent synthesis with static compensation of the impact of cross-links. Additional software has been developed to determine the parameters of the control system. After setting the necessary parameters, the process of automatic adjustment of the controller parameters starts. Self-tuning procedures …

Optimization In The Application Of Varnishes Barrier On Cartonboard Packaging, Andre Ramalheiro De Andrade, Maria Isabel Rodrigues Phd, Eduardo Luiz Machado Phd

Journal of Applied Packaging Research

In this work adjustments in the rotogravure printing process are proposed to the varnish water vapor transmission rate (WVTR) aiming to obtain results smaller than 20g/m²/24h. One case study was used for the propositions for improvements, where focused on varnish application process in a gravure printer for an eight-printing unit cartonboard packaging, maximum printing speed of 175 m/min and a 285 g/m² weight cartonboard. The possible variables that influenced the WVTR result were selected from the technical expertise of the people involved in the project, the analysis in the printing process with the application of directed trials using experimental designs …

Rotary Furnace Lining To Reduce Thermal Stress, Zamira Mukhamedbaeva, Erkin Kurbanov, Abduvali Mukhamedbaev

CHEMISTRY AND CHEMICAL ENGINEERING

The aim of the study is to reduce the thermal stresses of the lining in the areas adjacent to the flare sintering zone of rotary kilns intended for the production of cement clinker. It is proposed to use a lining made of parallel rows of alternating chamotte and chromium-magnesite refractory products to reduce thermal stresses in the areas adjacent to the flare sintering zone by up to 20%, increase the service life of the lining by 1.1-1.2 times as a result of equalizing thermal stresses in the areas of the sintering zone. Optimization of the initial raw material mixture, in …

Computer Simulation Of Particle Velocity In A Cyclone, Askar Artikov, Botir Usmonov, Dilshod Karabaev, Anvar Ulmasbaev, Lola Akabirova

CHEMISTRY AND CHEMICAL ENGINEERING

The article sets the goal of determining and calculating the speed of accelerated movement of particles in the gas-dust flow of an air cyclone, depending on the size of the cyclone, the physical properties of the particle and the gas-dust flow. A method for constructing a computer model of the motion of a particle in a roaring gas-dust flow of a cyclone is presented. The sequence of formalization of the computer model of the process of sedimentation of particles of a gas-dust flow of a cyclone unit is based on the theoretical foundations of aerodynamics and touches on the most …

Problems Of Modeling And Control Of The Technological Process Of Ore Grinding, Djalolitdin Pakhritdinovich Mukhitdinov, Sanjar Boybutayev

Chemical Technology, Control and Management

The article analyzes the methods of mathematical modeling of the closed-loop process of fine grinding of ore in order to predict the composition of the crushed raw material. Analyzed modeling methods that consider the control of classification of crushed raw materials and finished products by the size of the recirculating load, simulation modeling methods, methods that use neuro-phase netthe research apparatus, in which the fuzzy logic apparatus serves as a fundamental component for the formation of conclusions. The materials presented in the article reflect the theoretical substantiation and generalization of the accumulated practical experience in modeling and control of the …

Structural-Parametric Analysis And Synthesis Of Control Systems With Two Degrees Of Freedom, Azizbek Nodirbekovich Yusupbekov, Khurshid Salim Ugli Turayev

Chemical Technology, Control and Management

Automatic tuning of the parameters of PID - regulators is proposed by means of a modified experiment that takes into account the influence of elements and circuits in the form of additive uncertainty. The use of a multiply connected control scheme with two degrees of freedom for decoupling is proposed in order to facilitate the implementation of a mechanism for combating the phenomenon of integral saturation. Equations are derived for the transition from a circuit with one degree of freedom to a circuit with two degrees of freedom for the general and special cases of a two-dimensional system, which makes …

Algorithm For The Synthesis Of The Control System Of A Double Mass Elastic Dynamic Object, Isomiddin Khakimovich Siddikov, Gulchekhra Rakhimjonovna Alimova, Davronbek Abdalimovich Khalmatov

Chemical Technology, Control and Management

There are dealt with the creation of a control system for a dynamic object with an elastic property, described by a system of second-order differential equations, further transformed into two polynomial equations in matrix form in a paper. In order to solve the problem of synthesizing the control system, two matrix polynomials with unknown parameters were introduced into the system of equations, which is the transfer function of the controller, the order of which is two, giving the system the properties of astatism. To solve the delivered problem posed, the matrix polynomial equation was transformed into a matrix linear equation …

Preparation Of Meta-Nitrobenzoylhydrazone Ferrocenoylacetone And Synthesis On Its Basis, Zilola Abduraxmonovna Sulaymonova, Bako Bafayevich Umarov Doctor Chemical Science, Professor

Chemical Technology, Control and Management

β-diketone-ferrocenoylacetone was obtained by Claisen condensation. Meta-nitrobenzoylhydrazone of ferrocenoylacetone (H₂L) was synthesized by the interaction of meta-nitrobenzoic acid hydrazide with ferrocenoylacetone. On its basis, complexes with copper(II) and nickel(II) ions were synthesized. The obtained compounds were characterized by the methods of elemental analysis, IR-, ¹H NMR andelectronic spectroscopy. The research results showed that H₂L in solution exists in the form of a tautomeric mixture: hydrazone, α-hydroxyazine, and cyclic 5-hydroxypyrazoline forms. According to the results of IR and ¹H NMR spectra, the complexes were assigned a planar-square structure, and in them the doubly deprotonated …

Application Of Methods Of Intermittent Ventilation Of Industrial Premises Using A Digital Data Transmission System, Yuriy Shipulin, Abdullayev Temur, Jamolidin Usmanov, Shahnoza Ergasheva

Chemical Technology, Control and Management

The article is devoted to topical applied issues, the application of methods of intermittent ventilation of industrial buildings using a digital data transmission system. The requirements for the parameters of the environment are determined, which include: composition, purity, temperature, air humidity, the content of positive and negative ions, the presence of fields of various origins (thermal, optical, biological, gas, and electromagnetic). The authors of the article argue that some of the listed parameters can be supported by ventilation and air conditioning (SCA) systems.

It is shown that when the controlled parameters are limited to a multidimensional area, the SCA control …

Algorithms For Controlling The State Of Executive Mechanisms, Farkhod Kasimov, Mirkhalil Ismailov

Chemical Technology, Control and Management

When constructing automatic control systems, the main attention often is paid to determining the optimal parameters of system regulators than other elements that make up the system. The executive mechanisms also significantly affect the function quality of the control system. In this article, the actuators were considered as a sub-system within the control system and control algorithms with open and closed-loop communication relative to the actuators were investigated. To assess the real state of the actuators, and improved control structure with sensors installed on the moving parts has been developed. For this structure, an algorithm for evaluating and controlling the …

Artificial Neural Networks For Measuring The Moisture Of Bulk Materials, Erkin Uljaev, Shohrux Nurali O‘G‘Li Narzullayev

Chemical Technology, Control and Management

One of the urgent tasks of industrial production is improving the quality of verification of received, manufactured, and stored products, reducing energy consumption in the production of a final product. The solution to this problem is impossible without the creation of devices that control the quality indicators of materials within the limits of the permissible error. One of the most common indicators of the quality of bulk materials is moisture. In the national economy and industrial production, it is required to determine the moisture content of more than 500 different substances and materials. The paper shows the possibility of using …

Formalization Of The Procedure For Choosing The Optimality Criterion And Formulation The Problem Of Ammonium Nitrate Production Control, Husan Zakirovich Igamberdiev, Uktam Farkhodovich Mamirov

Chemical Technology, Control and Management

The article discusses the questions of formalization of the procedure for choosing an optimality criterion and setting the problem of controlling the production of ammonium nitrate. The analysis of the technical and economic features of the considered production is carried out. As a criterion for the efficient operation of ammonium nitrate production, such a technological indicator as specific technological costs for the main stages, determined by the interval of quasi-stationarity of the object, is used, i.e. the time of its stable work. To solve the control problem, it is proposed to use the decomposition of the control problem into a …

Models And Fuzzy Microclimate Control System In The Storage Of Archival Documents, Avaz Marakhimov Scd, Prof, Abdushukur Abdullaev

Chemical Technology, Control and Management

In this article, the main object of research is the creation of appropriate microclimatic conditions to ensure reliable and high-quality storage of archival documents, as well as automatic control of the optimal values of the main parameters of the external and internal environment that directly affect the quality of storage. To control the microclimate, three categories of models for automatic control of these parameters are considered separately in the archives: the “white box”, “black box” and “gray box " models. The results of the analysis of the advantages and disadvantages of the considered models are presented. The generalized structure …

Developing Algorithms For Automating The Processes Of Forming The Optimal Structural Composition Of Production - Technological Modules, Alisher Mamajanov, Sarvar Botir Ugli Nabiyev

Chemical Technology, Control and Management

In this research, we developed appropriate algorithms for the formation of the optimal structural composition of production - technological modules (PTM) based on the automation of the processes of determining and ensuring the functional-parametric compatibility (FPC) of their components. These algorithms are based on the developed mathematical models on the basis of the use of analytical methods for implementing the interconnection between the main components of the PTM.

A Study On Dynamic Characteristics Of A New Remote Transformer Current Converter Without Compensating Capacitor, Sulton Faizullaevich Amirov, Nargisa Kamilovna Babanazarova, Nurullo Rahmatullaevich Yuldashev

Chemical Technology, Control and Management

In this research paper, analytical equations of the transient characteristics of a new remote transformer current converter without a compensating capacitor have been obtained when a stepwise, linearly increasing, sinusoidal and sinusoidal with a damped amplitude of effects was applied to their input. It has been shown that the developed current converter can be represented in the structural schemes of monitoring and control systems in the form of a series-connected real differentiating link without statism and inertial (aperiodic) link of the first order, and in the case of neglecting active losses in the magnetic circuit and when the converter is …

Problem Solving Methods For Synthesis Of Physical Principles Of Mechatronic Module Operations In Intelligent Robotic Systems, Nazarov Khayriddin Nuritdinovich

Chemical Technology, Control and Management

The scientific paper investigates the methods for solving problems of synthesis of physical principles of operation of mechatronic modules of intelligent robotic systems are considered.

In addition, it deals with the specifics of the process of synthesis of the physical principles of the operation of mechatronic modules using predicate models, list models and information matrices of physical and technical effects.

It shows the interpretation of the components of the model of the system for the synthesis of the physical principles of operation of mechatronic modules of intelligent robotic systems and automatic control and the features of the synthesis algorithm for …