Electrical and Computer Engineering Commons^™

Preprocessing Of Speech Signals For The System Of Recognition And Spectral Analysis Of Speech, Sherzod Nematov, Y Kamolova

Technical science and innovation

Having a digital representation of a speech signal, we can think about metrics, that is, the parameters of this signal, with the help of which the program can recognize sounds, words and sentences with approximately the same result that a healthy hearing aid and a healthy human brain give.

Imitation Models Of The Railway Organization For Railway Transport Flows, J Usmonov, T Djuraev

Technical science and innovation

Considered the questions of solving the problem of optimization of cargo traffic management in the railway transport throughout the logistics chain, organizing the formation and implementation of cargo loading plans that do not allow exceeding the maximum and reduce the minimum levels of availability of a particular cargo on the destination road. And also the article justifies the solution of the problem of finding the maximum flow in the railway network, it is noted that in any transport network the maximum flow is equal to the minimum capacity. If the flow is maximal, then there is a section whose transmission …

Evaluation Of The Thickness Of Vacuum Metal And Semiconductor Coatings Using Computer Programs, Bahrom Igamov, Ilkhom Bekpulatov, Aleksey Kamardin, Tulkun Kamilov, Ilhom Turapov, D Igamova

Technical science and innovation

Comparative studies of the thickness of coatings of such metals as Cu, Ag, Cr, Co, and also Mn4 Si7 on polished substrates made of Si, Si O2 / Si structure, ST - 50 glass ceramic, mica were carried out. The coatings were deposited in vacuum using thermal evaporation and magnetron sputtering. The thickness and uniformity of deposited coatings on rotating substrates are estimated by optical measurements and computer simulation. Mathematical models for the formation of coatings on flat substrates have been developed. The possibility of the optimal position of the substrate for the formation of functional coatings uniform in thickness …

Predictive Analysis And Synthesis, Modeling And Control Of Complex Technological Processes And Systems, Zhahongir Sherboyevich Bekqulov

Chemical Technology, Control and Management

Consider the theoretical underpinnings of practically predictive analysis and synthesis, modeling and automatic control of complex chemical technological processes and systems, and the evolution of advanced (or advanced) APC (Advanced Process Control) control of technological processes and industries. The current state of industrial automation systems and the characteristics of their deployment are highlighted. The features of each stage of the analysis and synthesis of APC - advanced process control for complex dynamic objects are disclosed. The real situation and features of the implementation of industrial automation systems of industrial enterprises are reflected.

Virtual Analyzers For Increasing The Intelligence Of Industrial Process Control Systems, Umidjon Abdimajotovich Ruziev Phd, Marufjon Kobuljanovich Shodiev

Chemical Technology, Control and Management

It is shown that the development and implementation of virtual analyzers of the quality of the final industrial products is an effective tool for increasing the efficiency of industrial production. The methodology and stages of development of virtual analyzers for predicting the quality of products, monitoring non-measurable or difficult-to-measure parameters of continuous and periodic technological processes are considered, and issues of supporting and adapting a virtual analyzer during its operation without restructuring are also considered.

Algorithm For Calculating The Parameters Of A Multi-Position Electromagnetic Linear Mechatronic Module, Nazarov Khayriddin Nuritdinovich, Matyokubov Nurbek Rustamovich, Temurbek Omonboyevich Rakhimov

Chemical Technology, Control and Management

Currently, in the world in the field of science, engineering and technology, including in mechatronics and robotics, the creation of multi-coordinate mechatronic systems that perform power and control functions is becoming of paramount importance, this is due to a number of important positive qualities of the systems, such as simplicity and compactness of the design, the possibility of obtaining significant efforts, high accuracy and stability of the establishment of fixed positions, ease of control and high reliability. This article presents the calculation of the parameters of multi-position mechatronic modules based on linear execution elements. In the construction of this model, …

New Transformer Changer Static Characteristics Measuring Angle Silences Difference, Sultan Faizullayevich Аmirov, Nurulla Raxmatullayevich Yuldashev

Chemical Technology, Control and Management

Presented the specific features of the new transformer converter, which measures the difference in angular displacement, and examines the nonlinearity levels of static characteristics, sensitivity and static characteristics. Studies have shown that in a new measuring device, where one of the two moving parts consists of a magnetic conductor made in the form of an Archimedean spiral made of ferromagnetic material, the balance of the magnetic bridge changes not only depending on the angle of rotation of it’s shoulder resistances. the current is disturbed by the change in the magnitude of the combined air gap depending on the angle of …

Design Lifecycle Management Of Technological Processes, Yusuf Shodiyevich Avazov

Chemical Technology, Control and Management

The issues of life cycle management of design processes of complex technological processes are considered. An analysis of works devoted to the automated design of technological processes and industries, product life cycle management, and the use of predominant modeling in design is presented. A structure for the implementation of the design of technological processes is proposed and it’s components are described. An algorithm is proposed to reduce the life cycle of the design of a technological process. The sequence of selection of the most optimal project options with the help of the proposed algorithm is described. It is shown that …

Developing Advanced Process Control System For Manufacturing Processes Using Virtual Analyzer, Elyor Erkinovich Samadov

Chemical Technology, Control and Management

This research reflects outlines the main potential features of Advanced Process Control (APC) systems for improved control of technological processes and production. It is shown developing APC systems using a virtualized analyzer (VA) is a very effective technique to increase the efficiency of industrial production. This research reflects the main steps of generating VA as part of the APC system and also describes the key features of each step-in terms of analyzer synthesis.

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 …

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 …

Analysis And Selection Of Methods And Sensors For Controlling The Width Of The Working Slot Of The Harvesting Devic Cp., E Uljaev, U M. Udabydullaev, A A. Abdulkhamidov, S M. Erkinov Master

Technical science and innovation

A review and analysis of known works on the automation of control and regulation-monitoring of the width of the working slots of the harvesting apparatus (НA) of the cotton harvester, in particular, the automation of control and regulation of working units, which determines the indicators of the quality of the harvest and the productivity of the cotton harvester, is carried out. It has been substantiated that in order to increase the efficiency of the functioning of the cotton picker, automatic control and management systems are needed that perform the functions of information-measuring and control systems that perform horizontal and vertical …

Protection Of Transport Structures From Natural Emergencies, Shavkat Х. Abduazimov, Ravshan S. Razikov, Gani A. Kurbanov

Technical science and innovation

In the mountainous and foothill areas of the republic in spring and late autumn, heavy rains and floods cause landslides on the slopes, landslides as a result of coagulation of most of the land. At the same time, careless grazing of livestock on the slopes, felling of trees in the foothills, as a result of strong floods, the water flow on the slopes flows downhill, washing away all the debris, rocks and sand, endangering the movement of passenger and freight trains. . This article aims to protect against the above-mentioned situations, to ensure the safety of transport facilities. At the …

Combined Devices Of Facts Technology, Bahrom Ravshanovich Normuratov Associate Lecturer, Misrikhan Misrikhanov, Shukhrat Khamidov

Technical science and innovation

FACTS - Flexible Alternative Current Transmission System technology is a family of devices, each of which can be used individually and in concert with other devices to control the interrelated parameters of the electrical power system. The mission of FACTS technology is to improve the control of power flows in both steady-state and transient modes of EPS. Flexibility of Electric Power Transmission, applied as "The ability to adapt to changes in transmission system or operating conditions while maintaining sufficient operating limits in steady-state and transient modes". Controlled Flexible AC Transmission Lines - Flexibility from Electric Power Transmission means "AC Power …

Features Of Atom Spectra Ca, Ba, Sr, M A. Tursunov, A B. Zon, D A. Tashmuxamedova, A X. Xaydarov, S S. Pak, Z A. Alimova

Technical science and innovation

This paper deals with the issues of atomic spectroscopy of multiphoton ionization of alkaline earth atoms. The cycle of researches, which substantially complements the modern understanding of the physical essence of processes, is described. The analysis and generalization of the obtained experimental and available theoretical materials are carried out, and studies on the influence of the correlation of valence electrons on the process of multiphoton ionization of alkaline earth atoms are presented in detail. The appearance of intense intercombination transitions coincides in n with a sharp change in the magnitude of the quantum defect. Since an abrupt change in the …

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 …