The Concept Of Constructing Set-Theoretic Models Of Structures Of Intelligent Multi-Axis Mechatronic Robot Modules,
2021
Professor of Mechatronics and Robotics, Department of Electronics and Automation, Tashkent state technical university named after Islom Karimov
The Concept Of Constructing Set-Theoretic Models Of Structures Of Intelligent Multi-Axis Mechatronic Robot Modules, Nazarov Khayriddin Nuritdinovich, Matyokubov Nurbek Rrustamovich, Temurbek Omonboyevich Rakhimov, Pulatov Rustambek Alisher Ugli
Bulletin of TUIT: Management and Communication Technologies
The article discusses the features and areas of application of multi-axis electromagnetic mechatronic modules in modules of mechatronic and robotic systems that allow not only to increase productivity and improve the quality of manufactured products, but also by replacing heavy, monotonous and sometimes associated with a risk to human health, manual labor with a machine to release a person for creative constructive work. The generalized structure of a multi-axis mechatronic module is presented; multiple theoretical models of construction principles for the study of electromagnetic mechatronic modules of robots and robotic systems are constructed. In this case, the main attention is …
Data-Driven Tools Guided By First-Principles For Scale Modeling,
2021
Tuskegee university
Data-Driven Tools Guided By First-Principles For Scale Modeling, Sadegh Poozesh
Progress in Scale Modeling, an International Journal
For decades, traditional scale-modeling techniques have been relying on first-principles models (FPMs). FPMs have been used to find non-dimensional numbers (PIs) and identify normalized underlying forces and energies behind the phenomenon in focus. The two main challenges with FPM-based PIs extraction are finding the relevant PIs and proper correlations between PIs. The emergence and surge of data-driven modeling (DDM) provide a new opportunity to leverage experimental data in model development across scales/plants. In this paper, first, the two mentioned issues in PIs development will be elaborated to reveal the gap, and second, a new insight into scale modeling and similarity …
A Geometric Description Of The Set Of Stabilizing Pid Controllers,
2021
Southern Illinois University Edwardsville
A Geometric Description Of The Set Of Stabilizing Pid Controllers, Keqin Gu, Qian Ma, Huiqing Zhou, Mahzoon Salma, Xingzi Yang
SIUE Faculty Research, Scholarship, and Creative Activity
This article developed a new method to described the set of stabilizing PID control. The method is based on D-parameterization with natural description of the set. It was found that the stability crossing surface is a ruled surface that is completely determined by a curve known as discriminant. The discriminant is divided into sectors at the cusps. Corresponding to the sectors, the stability crossing surface is divided into positive and negative patches. A systematic study is conducted to identify the regions with a fixed number of right half-plane characteristic roots. The crossing directions of characteristic roots for positive patches and …
Process Modeling And Techno-Economic Analysis Of Micro- Encapsulated Carbon Sorbents (Mecs) For Co2 Capture In A Fixed Bed And Moving Bed Reactors,
2021
West Virginia University
Process Modeling And Techno-Economic Analysis Of Micro- Encapsulated Carbon Sorbents (Mecs) For Co2 Capture In A Fixed Bed And Moving Bed Reactors, Goutham Kotamreddy
Graduate Theses, Dissertations, and Problem Reports (ETD)
Carbon capture, utilization, and storage (CCUS) is seen as a suite of technologies to curb the carbon dioxide emissions from the atmosphere and plays a crucial role to meet the net zero emissions target for many countries by 2050. One of the major sources for CO2 emissions is combustion of fossil fuels. Various innovative capture technologies are being explored because the state-of-the-art monoethanolamine (MEA) based carbon capture technology has drawbacks such as corrosion, energy penalty. There are several potential solvents that have lower energy penalty, but they are highly viscous or may turn into solid phase in the absorber …
Quantifying The Impact Of Load-Following On Gas-Fired Power Plants,
2021
WVU
Quantifying The Impact Of Load-Following On Gas-Fired Power Plants, Yifan Wang
Graduate Theses, Dissertations, and Problem Reports (ETD)
Due to rapid penetration of renewables into the grid, natural gas combined cycle (NGCC) power plants are being forced to cycle their loads more frequently and rapidly than for which they were designed. However, the impact of load-following operation on plant efficiency and equipment health are currently poorly understood. The objective of this work is to quantify the impact of load-following on the gas-fired plants by developing high-fidelity multi-scale dynamic models. There are four main tasks in this project. First, dynamic model of an NGCC power plant has been developed. The main components of the NGCC plants are the gas …
Dynamic Modelling And Control Of Grid-Level Energy Storage Systems,
2021
West Virginia University
Dynamic Modelling And Control Of Grid-Level Energy Storage Systems, Sai Pushpitha Vudata
Graduate Theses, Dissertations, and Problem Reports (ETD)
The focus of this work is on two energy storage technologies, namely pumped storage hydroelectricity (PHS) and secondary batteries. Under secondary battery technologies, two potential technologies for grid-scale storage, namely high-temperature sodium-sulfur (NaS) battery and vanadium redox flow battery (VRFB), are investigated. PHS is a largescale (>100 MW) technology that stores and generates energy by transporting water between two reservoirs at different elevations. The goal is to develop a detailed dynamic model of PHS and then design the controllers to follow the desired load trajectory accurately with high efficiency. The NaS battery and VRFB are advanced secondary batteries which …
Multimodel Operability Framework For Design Of Modular And Intensified Energy Systems,
2021
West Virginia University
Multimodel Operability Framework For Design Of Modular And Intensified Energy Systems, Vitor Gazzaneo
Graduate Theses, Dissertations, and Problem Reports (ETD)
In this dissertation, a novel operability framework is introduced for the process design of modular and intensified energy systems that are challenged by complexity and highly constrained environments. Previously developed process operability approaches are reviewed and further developed in terms of theory, application, and software infrastructure. An optimization-based multilayer operability framework is introduced for process design of nonlinear energy systems. In the first layer of this framework, a mixed-integer linear programming (MILP)-based iterative algorithm considers the minimization of footprint and achievement of process intensification targets. Then, in the second layer, an operability analysis is performed to incorporate key features of …
Dynamic Optimization Algorithms For Baseload Power Plant Cycling Under Variable Renewable Energy,
2021
West Virginia University
Dynamic Optimization Algorithms For Baseload Power Plant Cycling Under Variable Renewable Energy, Rebecca Hyen Hae Kim
Graduate Theses, Dissertations, and Problem Reports (ETD)
The growing deployment of variable renewable energy (VRE) sources, such as wind and solar, is mainly due to the decline in the cost of renewable technologies and the increase of societal and cultural pressures. Solar and wind power generation are also known to have zero marginal costs and fuel emissions during dispatch. Thereby, the VRE from these sources should be prioritized when available. However, the rapid deployment of VRE has heightened concerns regarding the challenges in the integration between fossil-fueled and renewable energy systems. The high variability introduced by the VRE as well as the limited alignment between demand and …
Fermentability Of Concentrated Sulfuric Acid Hydrolyzates From Aspenwood And Pinewood,
2020
Department of Chemical and Mining Engineering, University of Dar es Salaam
Fermentability Of Concentrated Sulfuric Acid Hydrolyzates From Aspenwood And Pinewood, Kando Janga
Tanzania Journal of Engineering and Technology (TJET)
The fermentability of hydrolyzates derived from two-stage concentrated sulfuric acid hydrolysis of Trembling aspen (Populus tremula) and Scots pine (Pinus sylvestris) were investigated. Three types of hydrolyzates were produced at mild, moderate and high decrystallization severity conditions. Portions of each of the original hydrolyzates were concentrated by vacuum evaporation to increase the sugar fraction to simulate industrial applications. Both sets of hydrolyzates were fermented anaerobically using Saccharomyces cerevisiae ATCC 96581. After 23 hours of fermentation, complete glucose consumption was observed for all the original hydrolyzates, with no signs of inhibition. The ethanol yields from these hydrolyzates ranged from 68% to …
Machine Learning Based Applications For Data Visualization, Modeling, Control, And Optimization For Chemical And Biological Systems,
2020
Louisiana State University
Machine Learning Based Applications For Data Visualization, Modeling, Control, And Optimization For Chemical And Biological Systems, Yan Ma
LSU Doctoral Dissertations
This dissertation report covers Yan Ma’s Ph.D. research with applicational studies of machine learning in manufacturing and biological systems. The research work mainly focuses on reaction modeling, optimization, and control using a deep learning-based approaches, and the work mainly concentrates on deep reinforcement learning (DRL). Yan Ma’s research also involves with data mining with bioinformatics. Large-scale data obtained in RNA-seq is analyzed using non-linear dimensionality reduction with Principal Component Analysis (PCA), t-Distributed Stochastic Neighbor Embedding (t-SNE), and Uniform Manifold Approximation and Projection (UMAP), followed by clustering analysis using k-Means and Hierarchical Density-Based Spatial Clustering with Noise (HDBSCAN). This report focuses …
Pressure-Compensated Temperature Control In Rectification Column,
2020
Shahrisabz Branch of the Tashkent Institute of Chemical Technology
Pressure-Compensated Temperature Control In Rectification Column, Norkobilov Adham, Turakulov Zafar, Kamolov Azizbek, Talipov Hojiakbar
CHEMISTRY AND CHEMICAL ENGINEERING
The focus of this work is to study the control of a rectification column (RC) for separating n-butane (nC4) and n-pentane (nC5) mixtures. Two control structures based on conventional temperature control (TC) and pressure-compensated control (PTC) structures are studied and compared using Aspentech software. The control performance of TC and PTC are investigated in terms of the control of component purities in both distillate and bottoms streams, under various disturbances in feed and pressure conditions. Due to pressure compensation, PTC is superior to TC in terms of purity and impurity control under disturbances in feed and pressure conditions. Accordingly, simulation …
Integrated Cyberattack Detection And Resilient Control Strategies Using Lyapunov-Based Economic Model Predictive Control,
2020
Wayne State University
Integrated Cyberattack Detection And Resilient Control Strategies Using Lyapunov-Based Economic Model Predictive Control, Henrique Oyama, Helen Durand
Chemical Engineering and Materials Science Faculty Research Publications
The use of an integrated system framework, characterized by numerous cyber/physical components (sensor measurements, signals to actuators) connected through wired/wireless networks, has not only increased the ability to control industrial systems, but also the vulnerabilities to cyberattacks. State measurement cyberattacks could pose threats to process control systems since feedback control may be lost if the attack policy is not thwarted. Motivated by this, we propose three detection concepts based on Lyapunov‐based economic model predictive control (LEMPC) for nonlinear systems. The first approach utilizes randomized modifications to an LEMPC formulation online to potentially detect cyberattacks. The second method detects attacks when …
Process Improvement And Microbial Characterisation Of Biological Nitrogen Removal For Tropical Wastewater With Low Chemical Oxygen Demand/Nitrogen Ratio,
2020
Universiti Malaya
Process Improvement And Microbial Characterisation Of Biological Nitrogen Removal For Tropical Wastewater With Low Chemical Oxygen Demand/Nitrogen Ratio, How Seow Wah
Student Works (2020-2029)
Malaysia has one of the most established biological nitrogen removal in wastewater treatment plants (WWTPs) among the developing Southeast Asian countries. The current WWTPs’ design and operating guidelines in Malaysia are mainly derived from other developed countries with more experiences in operating biological nitrogen removal. These design guidelines are good practices for WWTPs in the temperate climate region, but may not be optimal for the local wastewater characteristics and tropical climate in Malaysia. The local wastewater industry is keen to improve the design and operation of WWTPs to reduce the energy consumption and operating cost, which helps to foster a …
A Study Of Security Problems In Big Data And Their Solutions,
2020
Tashkent University of Information Technologies named after Muhammad al-Khwarizmi Address: 108, Amir Temur st., 100200, Tashkent city, Republic of Uzbekistan E-mail: [email protected], Phone:+998-93-508-31-23
A Study Of Security Problems In Big Data And Their Solutions, Nozima Akhmedova
Chemical Technology, Control and Management
Statistical data on information security that concerns Big Data and is the most important for enterprises are provided. Based on this data, we studied problems such as the lack of big data practices and protection, the lack of techniques for protecting big data, the lack of standards for protecting big data, the lack of regulation of big data and ecosystems, security problems in Big Data, and proposed several proposals to improve the security of systems that use this technology.
Optimal Ratio Of Primary And Secondary Clarifier Characteristics In Wastewater Treatment Plants,
2020
The head of department “Energy Audit”, Bukhara Engineering Technological Institute, Bukhara, Uzbekistan, E-mail: [email protected], Phone: (+99899) 7061166;
Optimal Ratio Of Primary And Secondary Clarifier Characteristics In Wastewater Treatment Plants, Makhsud Idrisovich Makhmudov, Zafarbek Esanovich Kuziev, Siroj Sobirovich Nurov, Sanjar Siroj Ugli Sidikov
Chemical Technology, Control and Management
The issues of optimization of aerobic biological wastewater treatment processes are considered. Optimal ratios of characteristics and sizes of primary and secondary sedimentation tanks, as well as their relationship with the concentration of activated sludge by volume, are revealed. Graphical representations of the dependence of the volumes of primary, secondary and total volumes of structures on the concentration of activated sludge in cleaning processes with low and high loads are obtained. Experimental studies have shown that the concentration of activated sludge in the aeration tank and the silt index directly affect the deposition characteristics of activated sludge, in particular the …
Conceptual Basis For Modeling Multi-Cordinate Mechatronic Robot Modules,
2020
Tashkent State Technical University named after Islam Karimov Address: 2, University str., 100095, Tashkent, Uzbekistan
Conceptual Basis For Modeling Multi-Cordinate Mechatronic Robot Modules, Yusupbekov Azizbek Nodirbekovich, Nazarov Khayriddin Nuritdinovich, Matyokubov Nurbek Rustamovich, Temurbek Omonboyevich Rakhimov
Chemical Technology, Control and Management
The conceptual foundations of modeling multi-coordinate mechatronic modules of robots are considered. The use of a multi-coordinate mechatronic movement module in robots made it possible to obtain at the output of one module several linear and angular coordinates, which reduces the weight and dimensions of the robot and thereby improves its dynamic characteristics. The proposed original concept of the mathematical description of a multi-coordinate mechatronic module, which is focused on displaying their structural and operating features. A structural diagram of a developed industrial robot operating in a Cartesian coordinate system and built on the basis of a multi-coordinate mechatronic module …
Ecg Processing And Analysis Technique Based On Neural Network Learning Vector Quantization,
2020
Tashkent State Technical University, Address: 2 Universitetskaya st., 100095, Tashkent city, Republic of Uzbekistan E-mail: [email protected], Phone: +998-93-535-17-30;
Ecg Processing And Analysis Technique Based On Neural Network Learning Vector Quantization, Talat Madievich Magrupov, Sherzod Kalandarovich Nеmatov, Yokubjon Talatovich Talatov
Chemical Technology, Control and Management
The main parameters of the electrocardiogram (ECG) were processed on the basis of the neural network apparatus. A decision support algorithm for ECG analysis using a neural network for learning vector quantization is proposed. For the study was chosen such features as the duration of QRS complex, RR interval, amplitude of R-wave and the change in the slope of ST segment and heart rate, which are five inputs to the neural network learning vector quantization. Methods of pre-processing and analysis of extraction of ECG functions based on the ECG database of a medical institution in Matlab are presented. The generalized …
Capacity Transformer Of Coaxial And Cylindrical Form Of Humidity Meter,
2020
Doctor of technical sciences, Professor, Information processing, and control systems department at Tashkent State Technical University named after Islam Karimov, Tashkent, Uzbekistan, E-mail: [email protected];
Capacity Transformer Of Coaxial And Cylindrical Form Of Humidity Meter, Erkin Uljaev, Utkirjon Murodillaevich Ubaydullaev, Shohrux Nurali O'G'Li Narzullaev
Chemical Technology, Control and Management
The question of development and calculation of construction of a coaxial and cylindrical form of the capacity transformer of a humidity meter is considered. As basic data, the sizes and the materials ditches allowing to measure the humidity of different volumes of bulks from 5 to 50 gr are selected. As materials of a ditch, plastic are selected, and as tanks, the magnetizing materials are selected. It is briefly cited the advantages and disadvantages of ways to measure humidity and the basic dielectric characteristics of capacitive converters. The electrical replacement scheme of the proposed capacitive converter was provided and the …
Static Characteristics Of Thermal Humidity Converters Of Liquid Materials In Continuous Flow,
2020
Tashkent State Technical University, Address: 2 Universitetskaya st., 100095, Tashkent city, Republic of Uzbekistan;
Static Characteristics Of Thermal Humidity Converters Of Liquid Materials In Continuous Flow, N.I. Avezova, P.R. Ismatullaev, Paraxat Matyakubova
Chemical Technology, Control and Management
Thermal systems with distributed heat sources based on a pipeline segment with radial holes are proposed for the development of designs of thermal humidity converters for liquid materials. Across the liquid flow there are tubular arguments with cylindrical heat-sensitive elements, on the surface of which the heating element winding was wound, which significantly increased their sensitivity, speed, reliability and allowed the use of standard semiconductor heat-sensitive elements.
A Study Of Static And Dynamic Characteristics Of Multifunctional Signal Converters,
2020
Tashkent University of Information Technologies named after Muhammad al-Khwarizmi Address: 108, Amir Temur st., 100200, Tashkent city, Republic of Uzbekistan E-mail: [email protected], Phone:+998-94-343-54-91
A Study Of Static And Dynamic Characteristics Of Multifunctional Signal Converters, Akmal Abdumalikov
Chemical Technology, Control and Management
The issues of continuity, accuracy, speed and reliability of signal conversion, which are the main problems of quality control and management of production processes, remain relevant. Research shows that in practice there are different signal variables, the study of which is highly formalized in a number of modeling tasks and basic classification studies, in particular transients in converters, its sources and elements requires a unified mathematical approach, that is, visual, highly formalized modeling and research based on it. The paper presents a graph model of multifunctional signal converters that provide microprocessor and electronic devices with signals in the form of …
