Engineering Commons^™

Generalized Structural-Parametric Conceptual Model Of The Electromagnetic Mechatronic Module, N.R. Matyokubov, T.O. Rakhimov

Chemical Technology, Control and Management

This article is dedicated to developing a generalized structural-parametric conceptual model of the electromagnetic mechatronic module. The design of a mechatronic module based on an electromagnetic linear motor, which performs reciprocating movements in space along different coordinates simultaneously, is presented. This module is used to enhance the functional capabilities of mechatronic systems and robotic complexes employed in modern automotive, textile, mining, metallurgy, and energy industries. It also serves to improve technical characteristics such as operational accuracy and speed. Based on this design, a computational scheme has been constructed using a van-equivalent T-shaped four-pole circuit model of the mechatronic module. It …

Selecting The First Approach Speed Of The Igm-2k Measuring Head When Controlling The Installation Error Of Housing Parts On Tncd Machines, A.M. Abduvaliev

Chemical Technology, Control and Management

Theoretical analysis and experimental studies have been conducted on the automatic control process for installation errors of body parts using the IGM-2K measuring head on numerically controlled machines. The results of the experimental study are presented, detailing the actual values of control errors and the time costs associated with automatic approach methods using the IGM-2K for checking the base points of body part surfaces on these machines. An algorithm for selecting the first approach speed F1 for IGM-2K has been developed. In accordance with the developed algorithm, the optimal values F1 are determined for a different range of installation errors …

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 …

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, …

Improvement Of Methods And Means For Increasing The Accuracy Of Instruments For Measuring The Flow Of Liquids And Gases, U.A. Ruziyev, E.E. Ortikov

Chemical Technology, Control and Management

The work is devoted to the issue of increasing the accuracy of liquid flow measurement devices, containing a primary measuring transducer for measuring the pressure drop in a narrowed section of a pipeline, temperature sensors, a microprocessor, non-volatile memory, and a communication interface. To reduce uncertainty, the liquid flow measurement temperature compensation of the flow-measuring transducer is performed based on the readings of the temperature sensor installed in the measurement environment. The secondary transducer readings are calibrated based on the temperature sensor readings installed in the computing unit of the measuring device. For reliable measurement of the gas-liquid media flow, …

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.

Diagnosis Of Malfunctions In Servo Systems Considering Dynamic, Khurshid Salim Ugli Turaev

Chemical Technology, Control and Management

This study analyzes methods of fault-tolerant control and automatic fault diagnosis in servo systems considering dynamic redundancy. The application of diagnostic and fault-tolerant control methods is critical for addressing reliability and safety challenges in servo systems. Dynamic redundancy ensures the ability to respond quickly to faults in individual system components and minimizes their impact on overall system performance. The research examines approaches to fault detection, ensuring continuous operation of automated systems, and methods for their effective resolution. The practical significance of the study lies in the use of modern technologies to enhance the performance and fault tolerance of servo systems.

Method Of Selecting Elements And Designing Intelligent Optoelectronic Converters, Yuriy Gennadiyevich Shipulin, Zebiniso Akmalovna Zayniddinova, Rustam Mukhamadjonovich Rakhimov

Chemical Technology, Control and Management

The article is devoted to the method of selecting elements and designing intelligent optoelectronic displacement transducers. It is proposed that morphological tables be used to expand the principles of building intelligent multifunctional optoelectronic converters. Choosing the optimal structure of intelligent multifunctional optoelectronic converters allows you to use a combination of advanced techniques to improve the design and use the morphological matrix of the main elements to choose a new structure of elements and designs of intelligent multifunctional optoelectronic converters.

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.

Research Of Electromagnetic Interference Effects On The Operational Stability Of A Measuring Device, Erkin Uljaev, Elyor Faxriddinovich Khudoyberdiev, Utkirjon Murodillayevich Ubaydullayev, Shohrux Nurali O‘G‘Li Narzullayev

Chemical Technology, Control and Management

The article explores the impact of electromagnetic interference on the performance of measuring devices used in industrial environments. An experimental analysis of sensor parameters and the influence of electromagnetic fields on their accuracy was conducted. Testing methodologies utilizing shielding technologies were developed to enhance interference resistance. The results confirm the efficiency of protective shielding in ensuring stable device operation under various interference sources.

Methods Of Synthesis Of Regulators For Nonlinear Dynamic Systems, O.O. Zaripov, D.A. Akhmedov

Chemical Technology, Control and Management

Methods and algorithms for the synthesis of regulators for nonlinear dynamic systems are given, based on various approaches to the formation of a control device. We considered synthesis methods based on phase space, Lyapunov function method, vibration control, feedback linearization method, velocity gradient method, lag feedback method, adaptive, robust, intelligent approaches, fuzzy logic, systems with a variable structure, etc. All the methods of synthesis of nonlinear regulators discussed above give a solution to the problem only for rather narrow classes of objects. Therefore, the problem of building regulators for nonlinear systems in many cases has not yet been solved.

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. …

Enhanced Shoulder-Surfing Cued Recall Graphical Password System: Sequential Passpoint, Titus D. Fofung

Cybersecurity Graduate Research Symposium

During the past two decades, many graphical passwords have been used widely as an alternative to text-based passwords. However, most graphical password systems are plagued by shoulder-surfing problems, usability, and remembering capability. This study proposed a new graphical password called SPP (Sequential PassPoint), allowing users to remember three click-points on two images in specified order and image order. When the image order changes, the click order is reversed. Two decoy images for three random clicks were introduced to enhance the security of SPP. The proposed SPP system was validated both theoretically and empirically

Quantum Computing, Geopolitics, And Latin America, Heriberto Acosta-Maestre

Cybersecurity Graduate Research Symposium

No abstract provided.

Experimental Study To Assess The Role Of Environment And Device Type On The Success Of Social Engineering Attacks: The Case Of Judgment Errors, Tommy Pollock

Cybersecurity Graduate Research Symposium

No abstract provided.

Assessing Organizational Investments In Cybersecurity And Financial Performance Before And After Data Breach Incidents Of Cloud Saas Platforms, Munther B. Ghazawneh

Cybersecurity Graduate Research Symposium

No abstract provided.

Examining Consumers' Selective Information Privacy Disclosure Behaviors In An Organization's Secure E-Commerce Systems, Patrick I. Offor

Cybersecurity Graduate Research Symposium

No abstract provided.

Actuation And Stabilization Of Volume-Efficient Origami-Inspired Mechanisms, Hunter T. Pruett

Theses and Dissertations

Trends in the aerospace industry are driving payloads to be smaller and less expensive while yet delivering comparatively large antennas. Deployable reflectarray antennas (RA) are the object of much research to meet these demands because they operate in a flat plane and are easier to stow than parabolic reflector antennas. Because they operate in flat plane, deployable RAs are well-suited to thickness-accommodated origami-inspired mechanisms. This work addresses pattern selection and modification, thickness accommodation, actuation, and stabilization of origami-inspired mechanisms intended to be used as RAs. First, a modified Miura-ori pattern termed volume-efficient Miura-ori (VEMO) is introduced, selected for its ability …

Synthesis Of Neuronal Network Dynamics For Optimal Stimulus Encoding And Retention, Bethanna Thompson

McKelvey School of Engineering Graduate Student Theses & Dissertations

A central goal in neuroscience is to understand the relationship between the structure and activity of the brain and the resulting experience of thought and behavior that the brain underpins. Within this goal is the specific study of working memory: the process of storing, managing, and integrating incoming sensory information in the context of ongoing tasks. The process of working memory is foundational to higher cognition and reasoning, determining how we comprehend and interact with the world around us. The neural circuits responsible for working memory are seemingly able to store and process afferent stimuli with other recent or relevant …

Sunrise Propulsion Subsystem Leak Rate Measurement Methodology, Alex Kirkman, Brittany Woytko, Holly Walen, Bret Maughan

Space Dynamics Laboratory Publications

As part of the integration and testing for Sun Radio Interferometer Space Experiment (SunRISE), it was necessary to characterize the propellent leak rate of the fully assembled propulsion subsystem for each satellite to ensure compliance with performance requirements. SunRISE utilized a cold gas system for its propulsion subsystem, using R-236fa propellant inside a tank made from a monolithic 3D printed SLA material. It was not possible to accurately characterize the propellent leak rate via weight by measuring the mass loss from the tank. This is due to the SLA material having both a high absorbance rate of water in normal …

Multiscale Analysis Of Thermal Barrier Coated Cfrp Composites Under Thermal Loading, Devin Nielsen, Trenton M. Ricks, Juhyeong Lee

Mechanical and Aerospace Engineering Student Publications and Presentations

Carbon-fiber reinforced polymer (CFRP) composites are commonly used in high performance applications. Although offering several advantages (i.e., superior specific properties and improved structural rigidity), traditional CFRP composites often exhibit poor thermal stability due to a low matrix thermal decomposition temperature. The effective operating temperature of the CFRP composites can be raised by applying an outermost, protective thermal barrier coating (TBC) layer. Prefabricated high void content ceramic TBCs are ideal for composite applications due to their high thermal stability and relatively low thermal conductivity. In this paper, the thermo-mechanical response of the TBCCFRP composite laminate subjected to 500°C are assessed through …

Understanding Orbits: Orbit Facts, Robert J. Twiggs

Robert "Bob" Twiggs STEM Education Collection

A PowerPoint Presentation created by Professor Bob Twiggs titled "Understanding Orbits: Orbit Facts" from October 22, 2024.

Understanding Orbits: Just Enough To Make You Dangerous, Robert J. Twiggs

Robert "Bob" Twiggs STEM Education Collection

A PowerPoint presentation created by Professor Bob Twiggs titled "Understanding Orbits: Just enough to make you dangerous" from October 22, 2024.

Advancing Data-Driven Disaster Debris Characterization And Quantification, Jasmine Bekkaye

LSU Doctoral Dissertations

Natural hazards generate tremendous amounts of debris that negatively impact communities and overwhelm waste management infrastructure. The challenge in disaster debris planning and management stems from inconsistent and scarce post-disaster debris quantity data due to the chaotic nature of recovery operations. This leads to a limited understanding of key factors influencing disaster debris generation across hazards and regions, hindering the accuracy and efficiency of modeling. With the increasing availability of comprehensive post-disaster waste datasets, the capacity to understand debris generation is expanding. This dissertation aims to fill knowledge gaps on disaster debris generation as follows: (1) investigate existing technologies for …

Origami And Kirigami-Inspired Sandwich Panels For Uam Primary Structural Applications, Kalyan Raj Kota, Juhyeong Lee

Mechanical and Aerospace Engineering Faculty Publications

Foldcore sandwich panels (FSPs) provide highly tailorable structural and multifunctional performance over legacy sandwich panels made with honeycomb or foam cores. In FSP manufacturing, skins and foldcore are made from any flat sheets of unitary or hybrid materials, folded into a desired pattern. Two common folding mechanisms include origami and kirigami: origami core is involved with folding only, while kirigami core is associated with a strategic combination of folding and cutting. Material and core geometry can be determined to satisfy the applications’ performance requirements. Overall, origami- or kirigami-inspired FSPs have the potential to revolutionize the ways to design and …

Wing-Shaped Leading-Edge Stealth Composites Using An Over-Expanded Honeycomb Core And A Periodic Pattern Etched On Ni-Coated Glass Fabric For Lightning Strike Protection, Seonghaeng Heo, Hannah Jang, Shanigaram Mallesh, Dongjun Hong, Byeongsu Kwak, Juhyeong Lee, Youngwoo Nam

Mechanical and Aerospace Engineering Faculty Publications

This paper proposes an RF-stealth sandwich composite, designed in a leading-edge shape, using Ni-coated glass fabric and an over-expanded honeycomb core, which incorporates a highly conductive nickel-coated glass fabric for lightning strike protection. The presented structure was designed and fabricated using nickel-coated glass fiber, which effectively absorbs electromagnetic (EM) waves, and an SWCNT-coated over-expanded honeycomb core, which improves sheet resistance properties. The designed RAS was subjected to an artificial lightning strike with the waveform of component A. Pristine and damaged RAS specimens from the artificial lightning strikes were measured using a free-space measurement system. The fabricated RAS specimens demonstrated satisfactory …

Magnetic Resonance Imaging Of Ultrasound Fields For Visualization And Measurement Of Pressure Amplitudes, Paul-Emile Victor Passe-Carlus

Theses and Dissertations

In vivo pressure estimations for therapeutic ultrasound has the potential of rendering treatments using non-invasive ultrasound targeting safer and more reliable. By quantifying pressures and their respective spatial locations, better acoustic predictions and models can be made. In this thesis, we aim to measure a pressure field from a piezo-electric transducer through a ballistic gel medium by using an external gradient coil to encode the pressure field in a way that can be read and quantified using an MRI scanner. We describe the methods and the results pertaining to visualizing a pressure field. The setup was able to capture pressure …

Development Of Temperature Measurement And Control Of 3d Printed Microfluidic Devices Towards Biomolecular Analysis, Derek A. Sanchez

Theses and Dissertations

Microfluidics are devices with channels or reservoirs that have dimensions in the range of micrometers. They have an increasing role in biological analysis processes due to their ability to use very small sample volumes. Many microfluidic processes rely heavily on precise temperature measurement and control. Advances in 3D printing have led to high resolution digital light processing stereolithography (DLP-SLA) printers capable of using bio-compatible materials, available at BYU. This custom 3D printer has a resolution of 7.6 µm in the XY plane and 10 µm in the Z axis. Combined with a custom-made resin, we can produce microfluidic features as …

Design And Analysis Of Optimal Energy Efficient Routing Protocols For Lifetime Maximization And Qos Enhancement In Wireless Body Area Networks, Karthikeyan S

Theses and Dissertations

In recent times, Wireless Body Area Networks (WBAN) a subsection of Wireless Sensor Networks (WSN) a promising technology for the future healthcare realm with cutting-edge technologies that can assist healthcare professionals like doctors, nurses and biomedical engineers which enables one-to-one care by implementing Tele-Medicine and Tele-Health solutions. Machine Learning (ML) and Internet of Things (IoT) enabled medical big data is the future of the healthcare sector and Medical Technology-based industries leading to applications in other sectors such as fitness tracking for commercial purposes, Sportsperson health monitoring to track their day-to-day activities and wearable devices for critical and emergency care.

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