Engineering Commons^™

Research On Data Collection And Transmission Technologies For Automatic Control Of High-Frequency Ozonators In Water Disinfection, P.I. Kalandarov, D.R. Ermanova, N.Zh. Duisenov, M.Zh. Koshkinbayeva, B.B. Shynzhigit, D.A. Abdullaeva, Kh.Kh. Abdullaev

Chemical Technology, Control and Management

This scientific work analyzes the research on data collection and transmission technologies for automatic control of high-frequency ozonators in water disinfection. The purpose of the study is to improve disinfection efficiency and optimize the system's operation by using IoT and artificial intelligence technologies in the control of ozonators. During the study, data collected by sensors were processed in real time through an IoT system and analyzed using artificial intelligence. Results showed that the efficiency of ozonator control increased by 25%, and ozone consumption was reduced by 20%. The use of a PID controller allowed for a 15% reduction in the …

A New Method Of Determination Of Intercalibration Intervals Of Measuring Instruments Of Physico-Chemical Quantities Taking Into Account The Uncertainty Of Measurements, Sh.M. Masharipov, P.M. Matyaqubova

Chemical Technology, Control and Management

This paper presents a new method that can be applied in the field of metrology to determine and change the intercalibration periodicity during the operation of measuring instruments (certified standard chemical samples) used in the field of state metrological control and supervision. In modern metrology, the key issue is the determination and correction of intercalibration periodicity during the use of measuring instruments. The present paper presents a new method that can be applied in the sphere of state metrological control and supervision to improve the accuracy and reliability of measurements. The proposed method is intended only for exemplary measuring instruments …

The Problem Of Optimal Control Of Gas-Fired Furnace Operation, Azamat Toirovich Rajabov

Chemical Technology, Control and Management

The formulation of the problem of optimal control of gas-burning furnace operation in the glass industry is carried out. The main stages of solving this problem, starting from mathematical modeling of the investigated process and ending with the task of optimizing the furnace thermal regime, are considered. The model describes the evolution of temperature fields of fuel combustion, combustion rate, gas movement and emission concentration changes depending on control actions. Model-based control predicts the behavior of the system for the prediction horizon and selects optimal control actions on the object.

Troubleshooting And Diagnostics Of Electronic Computing Devices Using The Object Model Creation Method, Gulmira Shuxratovna Abidova, Asad Xolboy O’Gli Shosalmanov

Chemical Technology, Control and Management

This paper presents a major challenge in fault diagnosis for electronic computing equipment is developing an object model tailored to support diagnostic tasks. Effective fault localization requires establishing a link between the diagnostic process and the object model. This connection should enable direct observation of diagnostic points and organize all potential defect and fault sources to clearly show their impact on each diagnostic point and the relevant parameters. Achieving this necessitates comprehensive information about parameter values, expected variations, and the permissible relationships between network elements that generate these parameters. Therefore, building a robust model is essential to facilitate accurate fault …

Algorithms For Minimizing The Boundary Values Of The Quadratic Quality Criterion Based On Approximation Methods, Yulduz Mukhtarkhodzhaevna Abdurakhmanova

Chemical Technology, Control and Management

This paper considers approximation methods for solving optimization problems while discussing the possibility to reduce the large amount of calculations. Hence, the approximation range is selected in accordance with the optimal value of the quality indicator. To do this, the upper and lower boundaries are being calculated followed by generating the control sequences that minimize the specified boundaries. The next step is to find an approximate solution. An approximate solution to the dual control problem comes from the problem of optimal control of a linear Gaussian system with a quadratic quality criterion and unknown parameters. For the dual control problem, …

Neural Network Models Of Adaptive Position-Trajectory Control Systems Of Moving Objects, Dildora Usmonovna Sevinova

Chemical Technology, Control and Management

This article is devoted to neural network models of adaptive position-trajectory control systems of moving objects. Neural network models of adaptive positional-trajectory control systems of moving objects have been developed on the basis of proportional-differential adjusters, which allow for quick calculation and determination of nonlinear characteristics of the system. Also, the kinematic scheme of the multi-link industrial robot is presented for describing the motion of the multi-link industrial robot according to the specified traction and positions, and for representing the input forces and training in the neural network. Mathematical models for calculating the linear and rotational movements of the manipulator …

System Of Monitoring And Control Of Thermal Regime In Gas-Fired Furnaces, U.U. Kholmanov

Chemical Technology, Control and Management

The system of monitoring and control of thermal regime in gas furnaces is considered, the description of which includes temperature sensors, control systems and optimization algorithms. Attention is paid to monitoring, which allows to ensure stability and efficiency of furnace operation. The existing approaches to thermal regime control are analyzed. Examples of implementation of these systems are given, as well as the prospects for their development with regard to modern trends in automation and digitalization.

Development Of Structures Of Intellectual Control Systems Of The Rectification Process, Shodievich Avazov Yusuf

Chemical Technology, Control and Management

Rectification processes, which are considered complex technological processes, and the development of structures of intelligent systems for controling the work of rectification devices and columns, which serve to organize them, were considered. The need to build intelligent control systems is based on the fact that the progress of the rectification process is affected by a large number of factors, including temperature, pressure, consumption, temperature difference, concentration of mixtures, properties of light and heavy volatile components. The structure of an intelligent control system based on the situational control method for rectification devices is proposed. The architecture of the proposed intelligent control …

Self-Calibration Of Smart Sensors Based On Fuzzy Logic, U.A. Ruziev, M.K. Shodiev

Chemical Technology, Control and Management

The paper discusses and analyzes the application of fuzzy logic methods for self-calibration of measuring devices. In particular, the principles of constructing measurement devices based on fuzzy logic, based on linguistic variables and rules, are considered, which makes it possible to take into account various conditions and requirements of production processes. To illustrate the effectiveness of the proposed methods, the results of experiments on measuring and classifying process parameters using fuzzy logic algorithms are presented. The study also covered fuzzy rule methods for evaluating and processing measurement data based on expert knowledge and linguistic variables. Fuzzy rule-based systems are shown …

Implementation Of The Method Of Fuzzy Control Of The Rectification Process Based On Fuzzy Logic, Yusuf Shodievich Avazov, Kamola Rustamovna Abdullaeva

Chemical Technology, Control and Management

The method of controlling the rectification process using fuzzy control based on fuzzy logic is studied. The structural scheme of the rectification process control system based on fuzzy logic is proposed. The analysis of the operation of the fuzzy rectifier is also carried out by comparing the human with the elements of fuzzy thinking. It is shown that the logical thinking of the human is similar to the functions performed by the fuzzy rectifier and the work of the components of the intellectual control system. The terms of linguistic variables are presented to reflect the rectification process of multi-component mixtures. …

Numerical Simulation Of Gas Flow In A Direct-Flow Cyclone, V.S. Toptalov, S.U. Ganieva, O.M. Flisyuk, Kh.S. Nurmukhamedov

Chemical Technology, Control and Management

A numerical model of gas flow in a direct-flow cyclone of two different configurations is presented. The main task of the simulation was to determine the gas velocity field in the apparatus and analyze the presence of a turbulent wake of the stabilizer swirled, which can have a negative impact on the efficiency of the apparatus. During the study, it was found that when the gas flow is disrupted by the stabilizer of the swirler, a turbulent wake is formed, into which trapped particles can fall. The solution to this problem is to lengthen the stabilizer and increase its diameter. …

Research And Justification Of The Optimal Optical And Design Parameters Of The Activated Sludge Concentration Measuring Device For Biological Wastewater Treatment, Siroj Sobirovich Nurov, Makhsud Idrisovich Makhmudov, Uktam Farxodovich Mamirov

Chemical Technology, Control and Management

This article discusses the optimization of the design and optical parameters of an activated sludge concentration measuring device through experimental studies in laboratory conditions in order to improve the metrological characteristics of the meter. In particular, based on the optimality criteria, a more suitable type of photodetector for the meter is compared and selected; for the selected photodetector, the optimal distance with the emitter is determined, which is modern LEDs that emit light of a selective wavelength of radiation and under a certain degree of illumination. Based on the experiments conducted, it was determined that the optimal thickness between the …

Flow Distribution In Magnetic Circuits Of Measuring Transducers With Distributed Parameters And A Concentrated Longitudinal Excitation Winding, Kamila Jurayeva, Javharbek Fayzullayev, Usmon Mukhtorov

Chemical Technology, Control and Management

The given paper presents the flow distribution in magnetic circuits of measuring transducers with distributed resistance parameters of long ferromagnetic rods and the magnetic capacitance between them and a concentrated excitation winding using the example of a magnetic circuit of a new magnetically elastic tensile force measuring transducer. It is shown that in such magnetic circuits, the magnetic voltage and magnetic flux into the section of the excitation winding installation have maximum values, gradually decreasing from this section toward the end parts of the magnetic circuit. Suppose the rate of change of the magnetic voltage along the coordinate is practically …

Fuzzy Models And Optimization By Distillation Units In The Aspen Hysys Software Environment, Nodirbek Rustambekovich Yusupbekov, Farux Tulkunovich Adilov, Janibek Alibekovich Aytbaev

Chemical Technology, Control and Management

Developed fuzzy models and optimization of a deethanizer distillation column in the Aspen HYSYS software environment. This article presents the results of studies related to fuzzy modeling of distillation columns using the example of a typical deethanizer. A fuzzy computer model and optimization based on mathematical process modeling have been developed, which describes in detail technological processes using differential equations of energy transfer, material balance, hydraulics, and physicochemical kinetics inside the distillation column.

Impact Of Low-Altitude Technology On Low-Altitude Industry Development From Perspective Of Low-Altitude Economy, Yong Wang, Yusen Yang, Jimin Zeng, Zhenglong He, Zongxi Cen

Bulletin of Chinese Academy of Sciences (Chinese Version)

Low-altitude economy, as a typical representative of new quality productive forces and a strategic emerging industry, has become an important engine for promoting high-quality economic development and achieving technological self-reliance and self-improvement in China. This study systematically reviews the development trajectory of low-altitude economy, deeply elucidates the connotations and characteristics of low-altitude technology and its impact mechanisms on low-altitude industrial development, providing theoretical support for constructing a modernized low-altitude economic system. It finds that the concept of low-altitude economy has undergone a paradigm shift from industry terminology to economic formation, gradually completing the institutionalization process from strategic planning to legal …

Development Index Assessment And Future Prospects Of China’S Low-Altitude Economy, Jiaoe Wang, Delin Du, Zhuo Chen, Wenwei Tan

Bulletin of Chinese Academy of Sciences (Chinese Version)

With the gradual opening of low-altitude airspace and continuous advancements in low-altitude technology, the low-altitude economy has ushered in significant development opportunities, emerging as a quintessential example of new quality productive forces and garnering widespread attention from both the state and society. However, given China’s vast territory, the development trends and foundational conditions of the low-altitude economy vary considerably across regions, presenting distinct challenges and prospects. To accurately assess the development trends of the low-altitude economy, this study constructs an evaluation framework based on five dimensions, namely, innovation efficacy, industrial strength, scenario vitality, development potential, and support capability, and conducts …

Innovative Integration Of Modern Facade Design With Traditional Bubungan Tinggi Facade: Towards A Sustainable Home, Nursyarif Agusniansyah, Gusti Novi Sarbini

ASEAN Journal on Science and Technology for Development

This study investigates the transformation of Bubungan Tinggi, a traditional Banjar house with a high roof, into a modern home through the integration of modern facade design with traditional Bubungan Tinggi facade elements. Bubungan Tinggi is a monumental artifact in South Kalimantan representing the collective memory of the Banjar community with its distinctive typology and anatomy. With its unique typology and anatomy, this particular building has evolved into an iconic structure that symbolizes the collective memory of the Banjarese people.

This study uses a qualitative approach with design experiments to explore the integration of facade design, new form, and contemporary …

Learning Outcomes, Benefits, And Challenges Of International Research Experiences For Students (Ires): An Exploratory Study Of An Ires Program In China, Yousef Jalali, James Barilla, Kirsten Davis, Vinod Lohani, Rolf Müller

Journal of International Engineering Education

Despite the increasing number of international programs targeting students’ learning of research and intercultural skills, there has been limited holistic investigation of students’ experiences employing both qualitative and quantitative methods. In this study, we incorporated several measures to explore students’ experiences in an International Research Experiences for Students (IRES) program, which benefited from the existing partnership between Virginia Tech in the U.S. and Shandong University in China. We examined students’ intercultural competence and interdisciplinary research skills and explored students’ stories of their lived experiences across three cohorts, each with five students, who completed the IRES program. Both open-ended survey responses …

Global Horizons: Assessing The Impact Of Study Abroad Programs On Intercultural Competence Development Pre-College Technology Students, Aparajita Jaiswal, Muna Sapkota

Journal of International Engineering Education

Across fields, college and university graduates are increasingly expected to perform effectively in diverse, multi-cultural work environments. Given this reality, Higher Education Institutions (HEIs) are actively designing strategies to help students develop intercultural skills. Prior research has revealed that deliberately structured study abroad programs are an effective approach to nurturing intercultural competence among graduates. Consciously designed study abroad programs can provide students with opportunities to learn and reflect on their experiences. In this study, we aim to understand the impact of a study abroad program on pre-freshmen students enrolled in a College of Technology. Using a mixed-methods design, we examined …

A Plugin-Based Unreal Engine Adapter For Hla-Based Distributed Simulation, Mei Yang, Peng Wang

Journal of System Simulation

Abstract: With the wide application of game engine-based simulation in transportation, military and other fields, the demand for interoperability between game engine and traditional simulations is becoming increasingly strong. For the HLA-based integration of Unreal Engine and the traditional simulations, a plugin-based Unreal Engine adapter for distributed simulation is designed, which enables the rapid development of Unreal Engine federate and the efficient integration. The simulation shows the feasibility of the plugin-based Unreal Engine adapter.

Research On Sequential Design Methods For Satellite Combat Simulation Tests, Yanlin Wang, Zhijun Cheng, Zichen Wang, Jian Zhong

Journal of System Simulation

Abstract: Aiming at the problem that satellite monitoring mission simulation tests cannot take into account the number of sample points and model accuracy in the complex test space, a hybrid sequential test design method for satellite simulation tests based on sample density and local nonlinearity is proposed. Voronoi division is used to describe the density of discrete point distribution, and the nonlinearity is measured with the help of Taylor expansion and sample point neighborhood gradient information. The two are combined to calculate the hybrid metrics, and the sample points are ranked and new ones are added until the stopping criterion …

Improving Nsga-Iii Algorithm For Solving High-Dimensional Many-Objective Green Flexible Job Shop Scheduling Problem, Yigang Xu, Yong Chen, Chen Wang, Yunxian Peng

Journal of System Simulation

Abstract: Aiming at the poor initial solution quality and low local search efficiency of NSGA-III in solving the many-objective flexible job shop scheduling model, an improved NSGA-III (NSGA-III-TV) is proposed. Based on MSOS encoding, the different mixed initialization strategies are adopted for OS and MS chromosomes to improve the quality of initial solutions. Based on the critical path, an improved N6 neighborhood structure is used for neighborhood search, which effectively reduce the completion time and reducing search randomness. Three effective mutation operators are employed to expand the search space and improve the convergence capability in the later stages. Test results …

Multi-Objective Energy-Efficient No-Wait Flow Shop Scheduling Based On Hybrid Discrete State Transition Algorithm, Cong Wang, Jiaying Yu, Hongli Zhang

Journal of System Simulation

Abstract: A hybrid discrete state transition algorithm (HDSTA) is designed to solve the energyefficient no-wait flow shop scheduling problem (EENWFSP) minimizing makespan and total energy consumption. According to the characteristics of the problem, the coding method of job sequence and speed matrix is designed, and the heuristic algorithm is used to obtain the high-quality initial solution. According to the properties of EENWFSP, solving and allocating four discrete operators. The swap, shift and symmetry operators are embedded in secondary state transition are used for job sequence optimization, and the substitute operators are used for machine speed optimization. The speed substitute strategy …

Adaptive Recognition Method Of Capability Boundary Parameters For Unmanned Autonomous Systems, Jinwen Li, Peng Wang, Youmei Pan, Xinyao Hui

Journal of System Simulation

Abstract: To effectively cope with the dimension curse in simulation testing and reduce the number of simulations times needed in the traditional full-space parameter traversal, it is necessary to obtain specific simulation data to accurately reflect the modeling characteristics of the test data to obtain the informative and representative samples of the original data with a smaller number of simulations. A digital simulation test model for adaptive recognition ;/of capability boundary parameters for UAS is proposed. The model is initially constructed with a good point set with a multi-weight structure; In combination with an adaptive kernel function boundary point recognition, …

Operational Effectiveness Analysis Method Based On Spherical Fibonacci Lattice, Weiran Guo, Jiahao Zhou, Xiang Huang, Xin Zhao

Journal of System Simulation

Abstract: An operational effectiveness modeling and computing method based on spherical Fibonacci lattice is proposed to address the low simulation accuracy and computational efficiency of large-scale sampling for traditional latitude and longitude grids. The formal description of operational effectiveness in command information systems and the generation method of spherical Fibonacci grid points are provided. A command information systems capability analysis framework is constructed, which focuses on ensuring the continuous mission support and uses the responsibility area of combat tasks as a reference. Through a top-down system design approach, a layered and decoupled combat effectiveness computing framework is proposed which studies …

Ground Robot Relocation Method Based On Uav Point Cloud Map, Hongzhi Huang, Kai Yan, Changfeng Liu, Jianwen Wang, Bin Luo

Journal of System Simulation

Abstract: In response to the challenge of relocalization in air-ground collaborative systems without the support of Global Navigation Satellite System (GNSS), and the associated issues of insufficient accuracy, a coarse-to-fine relocalization algorithm based on a three-dimensional point cloud map is proposed. The algorithm eliminates the influence of invalid point clouds from the sky and ground through index filtering, performs coarse localization by extracting global features from the point cloud and applying truncated least squares estimation, and then employs voxel-based iterative closest point (ICP) for precise optimization to obtain the more accurate localization results. A ground robot localization and autonomous navigation …

Research On Digital Twin Technology Of Coal Mine Tunneling Machine System, Xingwang Cai, Yaoqiang Pei, Jihua Yang, Ruifeng Pang

Journal of System Simulation

Abstract: Aiming at the problems in coal mine tunneling operations, including complex geological structures, harsh on-site conditions, low automation of excavation equipment, and frequent safety incidents, a digital twin solution is proposed. PLC as hardware core, MQTT protocol, and EMQX as foundation, through the integration of IoT, internet, digital twins, and virtual reality technologies, the mapping rules for parameter matrices and a fault cause analysis table are established, which realize the functions such as data collection, processing during excavation, data mapping between equipment and twin models, data storage, process simulation, remote control, intelligent fault detection, and early warning, and significantly …

Research On Application Of Intelligent Indication Signs In Improving Efficiency Of Crowd Evacuation, Heng Niu, Yanbin Han, Liang Li, Weilin Chen, Sijie Niu, Qingtao Hou

Journal of System Simulation

Abstract: Aiming at the low emergency evacuation efficiency of dense crowds in confined spaces, a crowd evacuation guidance model based on intelligent signs is constructed in this paper. A balanced congestion strategy to optimize the signs layout and a social network search-based sign guidance weights optimization method are proposed to improve evacuation efficiency. Simulation experiments show that the optimized intelligent sign layout can effectively alleviate the local congestion during evacuation and reduce the time consumption of pedestrians caused by congestion. The optimized intelligent sign guidance weights can further balance the utilization rate of exits, which is conducive to making full …

Garage Agv Path Planning And Simulation Based On Improved Dwa, Zongfang Ma, Linxuan Zhang, Lin Song, Jia Wang

Journal of System Simulation

Abstract: Aiming at the path planning and real-time obstacle avoidance of AGV in complex path environment of intelligent garage, an improved hybrid algorithm combining ant colony algorithm and dynamic window method is proposed. In the global planning, the adaptive adjustment of pheromone volatilization coefficient and the fusion of angle parameters are introduced to establish the garage direction pheromone matrix to increase the guidance ability of target points, expand the direction selectivity of ants. In the local planning, the improved DWA of the obstacle distance evaluation subfunction based on elliptic equation is designed. By extracting the global path node of the …

Adaptive Tracking Control For Omnidirectional Vehicle Based On Characteristic Modeling, Lei Cheng, Haoyou Wang, Xinjie Chen

Journal of System Simulation

Abstract: Aiming at the stable and high-precision tracking control of omnidirectional mobile vehicles affected by their own characteristics and external disturbances, an adaptive tracking control approach for omnidirectional vehicles based on characteristic modeling is designed. The characteristic model is established by integrating the model properties into the characteristic parameters, and the characteristic parameters are estimated online by using the projected gradient method. A full coefficient adaptive control law based on the characteristic model is designed, and the stability of the proposed control method is analyzed by using Lyapunov theory. The effectiveness and rationality of the proposed adaptive control scheme are …