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Development of Electrical Resistance Tomography Applying Vertical Metallic Column

Journal of Physics: Conference Series 2021年第1期1874卷

作者： Suzanna binti Ridzuan Aw Ruzairi bin Hj Abd Rahim Yasmin binti Abdul Wahab Farah Hanan binti Azimi Lia Safiyah binti Syafie Raja Siti Nur Adiimah binti Raja Aris Faculty of Engineering Technology University College TATI (UC TATI) Telok Kalong 24000 Kemaman Terengganu Process Tomography and Instrumentation Engineering Research Group (PROTOM-i) INFOCOMM Research Alliance Faculty of Electrical Engineering Universiti Teknologi Malaysia 81310 UTM Skudai Johor Malaysia Department of Instrumentation & Control Engineering (ICE) Faculty of Electrical & Electronics Engineering Universiti Malaysia Pahang 26600 Pekan Pahang Malaysia

Majority of industrial pipelines and process vessels are constructed from conducting composites. This paper focusing on the hardware and software development of laboratory test Electrical Resistance Tomography (ERT) measurement methods to obtain the cross-sectional image of the conductivity distribution of gas bubble phantom in a static vertical metallic column filled with water. The system with sixteen sensors implementation was investigated on a stainless steel vertical column of 100 mm inner diameter. The conducting boundary strategy was applied as the measurement strategy. Software for the current study was developed using Graphical User Interface (GUI) application program in MATLAB. The software contains many functions to ease user to get necessary information from the research done. The cross section image of the bubble phantom was reconstructed using Linear Back Projection (LBP) algorithm after the data collection process was completed. The system has been tested and can successfully generate the phantom under test.

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Study of Interaction between Operational Clock-Frequency and Energy Consumption of Microcontrollers for Wireless Sensor Applications 4

Study of Interaction between Operational Clock-Frequency and...

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4th International Conference on engineering, Applied Sciences and Technology, ICEAST 2018

作者： Jayasvasti, Subhawat Isarakorn, Don Instrumentation and Control Engineering Department Faculty of Engineering King Mongkut's Institute of Technology Ladkrabang Bangkok Thailand

This work focuses on the diagnosis of energy consumption of commonly used microcontrollers with various driving clock-frequency. The interaction among the driving clock-frequency, processing time and current consumption are determined to be a guidance for the design of low-power wireless sensor applications. In implementation, the microcontrollers are supposed to process the data following the operational procedures of wireless sensor application, which is programmed to solve mathematical equation with various driving clock-frequencies, and then sleep to reduce the power consumption. With a single circle procession, the current consumption at each driving clock-frequency are captured and analyzed. As the results, the current consumption is proportional to the driving clock-frequency, however energy consumption is minimized at highest clock-frequency. © The Authors, published by EDP Sciences, 2018.

关键词： Microcontrollers

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LQR/PID controller design of PLC-based inverted pendulum

LQR/PID controller design of PLC-based inverted pendulum

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2018 International MultiConference of Engineers and Computer Scientists, IMECS 2018

作者： Sirisantisamrid, Kaset Wongvanich, Napasool Gulpanich, Suphan Tammarugwattana, Narin Department of Instrumentation and Control Engineering Faculty of Engineering King Mongkut’s Institute of Technology Ladkrabang Bangkok Thailand

ISBN: (纸本)9789881404886

This paper presents an LQR based PID controller to control the inverted pendulum system. The control design employs a control zoning approach whereby the entire pendulum system is divided into two regions: a normal pendulum region and the inverted pendulum region where the system is approximately linear close to the upright position. The LQR architecture is used to obtain optimal gains for the PID controller. An algebraic approach is also presented for selection of Q and R matrices. Experimental implementations with a PLC based system show that the computed gains yield the most stable controlled responses compared to the gains chosen through trial and errors. © 2018 Newswood Limited. All rights reserved.

关键词： controllers

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Force-based Feedback for Haptic Device of Mobile Assembly Robot

Force-based Feedback for Haptic Device of Mobile Assembly Ro...

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International Workshop on Electric Drives: Optimization in control of Electric Drives (IWED)

作者： Aleksandr Lukin Galina L. Demidova Anton Rassõlkin Toomas Vaimann Hamid Roozbahani Faculty of Control System and Robotics ITMO University Saint Petersburg Russia Department of Electrical Power Engineering and Mechatronics Tallinn University of Technology Tallin Estonia Laboratory of Intelligent Machines Lappeenranta University of Technology Lappeenranta Finland

ISBN: (数字)9781728141589

ISBN: (纸本)9781728141596

This paper describes the control system for twin serial robot manipulators, installed on TIERA mobile robot, focusing in Robot Operating system (ROS) based control network and haptic feedback. Forward and inverse kinematics were used to translate the angular positions of Geomagic touch into joint angles of both UR10 manipulators. Force feedback allows the operator to sense forces applied to both grippers of robotic arms simultaneously using two Geomagic touch. Field tests of TIERA have shown that haptic feedback was established accurately, directions of forces inside the haptic device correspond with directions of forces affecting the gripper, and the current scaling coefficient is enough to sense forces on the haptic device.

关键词： Manipulators Robot sensing systems Robot kinematics Haptic interfaces Software

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Effects of mn substitution on magnetic properties of zno nanoparticles

Effects of mn substitution on magnetic properties of zno nan...

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International Conference on Magnetism and Its Application, ICMIA 2019

作者： Asih, Retno Dhari, Rosana Martina Baqiya, Malik Anjelh Astuti, Fahmi Harsono, Heru Saiyasombat, Chatree Kawamata, Takayuki Noji, Takashi Sato, Hidetaka Kato, Masatsune Watanabe, Isao Darminto Department of Physics Faculty of Science Institut Teknologi Sepuluh Nopember Surabaya60111 Indonesia Meson Science Laboratory RIKEN Nishina Center Wako351-0198 Japan Department of Physics Faculty of Mathematic and Natural Science University of Brawijaya Malang65145 Indonesia Synchroton Light Research Institute 111 University Avenue Muang District Nakhon Ratchasima3000 Thailand Department of Applied Physics Graduate School of Engineering Tohoku University Sendai980-8579 Japan Center of Excellence in Automotive Control and System Institut Teknologi Sepuluh Nopember Surabaya60111 Indonesia

ISBN: (纸本)9783035717044

Effects of Mn-substitution on magnetic properties of Zn1-xMnxO (MZO) nanoparticles with x= 0.00, 0.03, 0.05 and 0.07 have been investigated along with their local structure. The study on Mn K-edge XANES spectra of MZO reveals that the oxidation state increases by the Mn-substitution, which further implies that MZO exhibits a mixed valence state of Mn3+/Mn4+. The local structure analysis on Mn K-edge EXAFS spectra shows that the coordination number (CN) of Mn reduces by increasing Mn concentration, thus the amount of oxygen vacancy (VO) increases by the Mn-substitution. Interestingly, the magnetization of MZO also tend to increase as the Mn concentration increases. The M(H) curves exhibit linear (paramagnetic) behavior, showing no evidence of room-temperature ferromagnetism. Our results show that the magnetism of MZO is related to the correlation between the Mn magnetic moment and VO. © 2020 Trans Tech Publications Ltd, Switzerland.

关键词： Oxygen vacancies

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Design of robust controller applied for series elastic actuators in controlling Humanoid's joint

arXiv

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arXiv 2021年

作者： Luu, Anh Khoa Lanh Duong, Van Tu Nguyen, Huy Hung Kim, Sang Bong Nguyen, Tan Tien National Key Laboratory of Digital Control and System Engineering Ho Chi Minh City University of Technology VNU-HCM Hochiminh city Viet Nam Department of Mechatronics Ho Chi Minh City University of Technology VNU-HCM Hochiminh city Viet Nam Faculty of Electronics and Telecommunication Saigon University Viet Nam Pukyong National University Busan Korea Republic of

Although the application of Series elastic actuators (SEAs) in the biomechatronic field has proved its appropriation in many aspects so far, the problems of maintaining the stability for the SEAs still remains. This paper proposes a robust controller so that to overcome the drawbacks of the previous researches. Firstly, a mathematical model considering both the SEAs and the hip joint of humanoid UXA-90 is obtained. Secondly, a reference input of the proposed controller that is achieved from desired hip joint's angle in a walking cycle is utilized. Then, a backstepping based sliding mode force control approach is employed to ensure the precise movement of robot's link as well as meeting the requirement of robustness for the whole system, which is significant for the task of walking of a humanoid. Finally, some simulations are carried out to verify the quality and effectiveness of the proposed controller. © 2021, CC BY.

关键词： Sliding mode control

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control of an Off-Grid PV system based on the Backstepping MPPT controller

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Procedia Manufacturing 2020年 46卷 715-723页

作者： Hanane Yatimi Youness Ouberri Sara Chahid Elhassan Aroudam Modeling and Simulation of Mechanical System Team Physics Department Faculty of Sciences Abdelmalek Essaadi University Sebta Ave. Mhannech II BP 2121 39002 Tetouan Morocco Systems Control and Decision Ensit Engineering School 90000 Tangier Morocco Physical Chemistry Department Faculty of Sciences Cádiz University 11510 Puerto Real (Cádiz) Spain

This work presents the modeling and the control of an Off-grid Photovoltaic (PV) system which consisted of a monocristalline PV module, a DC load, a DC-DC boost converter and a maximum power point tracking (MPPT) bloc. The output characteristic of the PV module is nonlinear and changes with solar irradiance and temperature. So, for given climatic conditions, the PV module output power is maximal when its voltage equals to a certain value. When temperature and solar irradiance change, the duty cycle of the converter considered as the control law is continuously adjusted to track the maximum power point (MPP) of the module. This paper highlights the non-linear Backstepping controller to extract the maximum power from the PV system. Asymptotic stability of the system is verified through Lyapunov stability analysis. The simulations results show that the proposed controller offers fast and accurate tracking of the MPP whatever is the change of the climatic conditions.

关键词： PV system Boost converter MPPT Backstepping control (BC)

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Queueing theory based accelerated traffic discharging model in front of emergency vehicle on intersection

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International Journal of Vehicle Autonomous systems 2019年第3期14卷 213-238页

作者： Sumaryo, Sony Halim, Abdul Ramli, Kalamullah Joelianto, Endra Department of Electrical Engineering Faculty of Engineering Universitas Indonesia Depok16424 Indonesia School of Electrical Engineering Telkom University Bandung Indonesia Instrumentation and Control Research Group Faculty of Industrial Technology Institute of Technology Bandung Bandung Indonesia

Intelligent Transportation system (ITS) is the integration between communication networks, real-time control, and information technology. The system is expected to perform more complex traffic arrangements, in particular traffic management of emergency vehicles. Implementation with traffic signal pre-emption alone is not enough to give space for the emergency vehicle to cross an intersection safely, especially if the lane street has only one lane. The paper proposes a new model of traffic discharge acceleration based on queueing theory approach. In the proposed model, two performance indicators are introduced which are: speed of normal traffic in front of the emergency vehicle and travelling time of the emergency vehicle. The aim is that the emergency vehicle could reach a destination within a certain time and a constant speed. Moreover, the delay should be managed to a minimum. Linear and exponential acceleration formulas of the traffic in front of the emergency vehicle are derived and then validated. Performances of the model are tested against the models in the literature. Simulation results show the proposed model leads to better assurance that emergency vehicle is not delayed significantly. Based on the validation test, a formula has also been developed according to the proposed model. Copyright © 2019 Inderscience Enterprises Ltd.

关键词： Queueing theory

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Performance and behavior analysis of piezoelectric energy harvesting floor tiles 5

Performance and behavior analysis of piezoelectric energy ha...

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5th International Conference on engineering, Applied Sciences and Technology, ICEAST 2019

作者： Panthongsy, Phosy Isarakorn, Don Hamamoto, Kazuhiko Janphuang, Pattanaphong Faculty of Engineering Department of Instrumentation and Control Engineering King Mongkut's Institute of Technology Ladkrabang Bangkok10520 Thailand Department of Information Media Technology School of Information and Telecommunication Engineering Tokai University 2-3-23 Takanawa Minato-ku Tokyo108-8619 Japan Synchrotron Light Research Institute 111 University Avenue Muang District Nakhon Ratchasima30000 Thailand

ISBN: (纸本)9781728100678

This paper presents the performance and behavior analysis of two unlike piezoelectric energy harvesting floor tiles in which they are functioned with different frequency up-conversion strategies to achieve the high energy conversion efficiency from low and variable-frequency vibration as the human footstep. One of such strategies is to convert the frequency of piezoelectric bimorph up through the magnetic interaction between a permanent magnet and an iron plate, while another one is achieved on that through the mechanical impact between a cover plate and a wall of the floor tile. Experimentally, the floor tiles having one piezoelectric bimorph inside of them are prototyped and then mounted to their individual input-exciting kit to investigate the energy harvesting performance. The input-exciting kits are employed to simulate the human footstep on floor tiles. The results show that the floor tile with frequency up-converting mechanism based on mechanical impact should be a better option for energy harvesting from human footstep due to the low-profile structure and good energy harvesting performance. Moreover, its operational way can result in long-lasting piezoelectric bimorph. When a cover plate is actuated to move down with the velocity of 54.13 mm/s and then released, the floor tile can produce the average power of 0.82 mW at load resistance approximately of 55.68 kΩ. © 2019 IEEE.

关键词： Energy harvesting

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Approximation of second order dead time system using generalized Laguerre functions

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AIP Conference Proceedings 2022年第1期2425卷

作者： Martin Tůma Pavel Jura Vilém Kárský Central European Institute of Technology CEITEC BUT Brno University of Technology Technicka 12 616 00 Brno Czech Republic Department of Control & Instrumentation Faculty of Electrical Engineering and Communication Brno University of Technology Technicka 12 616 00 Brno Czech Republic

The aim of this text is to show that when approximating a 2nd order system with one double pole and with a dead time (DT), the approximation with the generalized Laguerre Function (GLF) for large DT gives better results than with the simple Laguerre function (SLF). For a given required integral square error (ISE), the GLF series has a smaller number of terms. However, for small DT, there is an area in which the SLF approximation gives a smaller ISE error.

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