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Design and Implementation of a Tree Climbing Robot

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Design and Implementation of a Tree Climbing Robot

International Conference on Advanced Engineering Theory and Applications, AETA 2022

作者： Vu, Tri-Vien Bui, Manh-Tuan Nguyen, Quang-Thang Dang, Minh-Hieu Modeling Evolutionary Algorithms Simulation and Artificial Intelligence Faculty of Electrical and Electronics Engineering Ton Duc Thang University Ho Chi Minh City Viet Nam Phước Long B Ho Chi Minh City Industry and Trade College 20 Tang Nhon Phu District 9 Ho Chi Minh City Viet Nam Undergraduate Student From Faculty of Electrical and Electronics Engineering Ton Duc Thang University Ho Chi Minh City Viet Nam

ISBN: (纸本)9789819987023

This work proposes a straightforward climbing mechanism for a tree climbing robot. The proposed robot consists of a body, a lower- and an upper-gripper. Each gripper has four fingers that actuated by an electric series elastic linear actuator. The body is equipped an electric linear actuator that help the robot to be extended or collapsed. Four loadcell sensors are attached at the end of the elastic elements to measure their corresponding compression forces which are proportional to the holding forces of the grippers. Three ultrasonic sensors are used to measure the linear actuator stroke displacements which would be used to control the holding forces, estimate the tree diameters and/or the tree heights. The robot is remotely controlled through a long-range radio frequency communication by using a Lora32 receiver and transmitter. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2024.

关键词： Machine design

Solution of the gardner problem on the lock-in range of phase-locked loop

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arXiv

arXiv 2017年

作者： Kuznetsov, N.V. Leonov, G.A. Yuldashev, M.V. Yuldashev, R.V. Modeling Evolutionary Algorithms Simulation and Artificial Intelligence Faculty of Electrical and Electronics Engineering Ton Duc Thang University Ho Chi Minh Viet Nam Faculty of Mathematics and Mechanics Saint-Petersburg State University Dept. of Mathematical Information Technology University of Jyaskyla Institute of Problems of Mechanical Engineering

The lock-in frequency and lock-in range concepts were introduced in 1966 by Floyd Gardner to describe the frequency differences of phase-locked loop based circuit for which the loop can acquire lock within one beat, i.e. without cycle slipping. These concepts became popular among engineering community and were given in various engineering publications. However, rigorous mathematical explanations of these concepts turned out to be a challenging task. Thus, in the 2nd edition of Gardner's well-known work Phaselock Techniques he wrote that "despite its vague reality, lock-in range is a useful concept" and posed the problem "to define exactly any unique lock-in frequency". In this paper an effective solution for Gardner's problem on the definition of the unique lock-in frequency and lock-in range is discussed. The lock-in range and lock-in frequency computation is explained on the example of classical second-order PLL with lead-lag and active proportional-integral filters. The obtained results can also be used for the lockin range computation of such PLL-based circuits as two-phase PLL, two-phase Costas loop, BPSK Costas loop, and optical Costas loop (used in intersatellite communication). Copyright © 2017, The Authors. All rights reserved.

关键词： Phase locked loops

Intelligent Computing & Optimization 1

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丛书名： Lecture Notes in Networks and Systems

1000年

作者： Pandian Vasant Gerhard-Wilhelm Weber José Antonio Marmolejo-Saucedo Elias Munapo J. Joshua Thomas

Fuzzy Luenberger Observer for Sensorless Control of Induction Motor Drive

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Fuzzy Luenberger Observer for Sensorless Control of Inductio...

International Conference on Advanced Engineering Theory and Applications, AETA 2022

作者： Nguyen, Quang Thanh Nguyen, Trung Van Tran, Binh Ngoc Nguyen, Dung Quang Vo, Hau Huu Phan, Liem Dung Brandstetter, Pavel Faculty of Electrical and Electronics Engineering Ton Duc Thang University Ho Chi Minh City Viet Nam Department of Facility Management Ton Duc Thang University Ho Chi Minh City Viet Nam Modeling Evolutionary Algorithms Simulation and Artificial Intelligence Faculty of Electrical and Electronics Engineering Ton Duc Thang University Ho Chi Minh City Viet Nam R&P Electronics Company Limited Ho Chi Minh City Viet Nam Faculty of Electrical Engineering and Computer Science VSB–Technical University of Ostrava Ostrava Czech Republic

ISBN: (纸本)9789819987023

The paper presents integration of fuzzy logic into adaptation mechanism of Luenberger observer for sensorless pulse width modulation-direct torque controlled (PWM-DTC) induction motor (IM) drive. At first, DTC strategy and PWM technique are described. Next, basic mathematical model for state representation, adaptive signal and proportional-integral (PI) adaptation mechanism of Luenberger observer is shown. However, the PI adaptation mechanism cannot ensure desired motor speed responses in both dynamic and steady-state operations of IM drive. Fuzzy logic control theory is added to overcome the disadvantage of PI adaptation mechanism via update proportional gain and integral constant time of PI controller. simulations of sensorless control for two adaptation mechanisms are carried out at different reference speeds. Speed deviations are utilized to evaluate the performance of two adaptation mechanisms at both dynamic and steady-state operations. Theoretical assumptions of high performance of fuzzy logic are validated by assessments. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2024.

关键词： Fuzzy logic

Performance of RIS-Assisted Two-Way Communications with Phase Noise

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Performance of RIS-Assisted Two-Way Communications with Ph...

International Conference on Advanced Engineering Theory and Applications, AETA 2022

作者： Tu, Lam-Thanh Nguyen, Tan N. Tran, Phuong T. Van Huynh, Van Trung Duy, Tran Nguyen, Nhat-Tien Voznak, Miroslav Communication and Signal Processing Research Group Faculty of Electrical and Electronics Engineering Ton Duc Thang University Ho Chi Minh city Viet Nam Wireless Communications Research Group Faculty of Electrical and Electronics Engineering Ton Duc Thang University Ho Chi Minh city Viet Nam Modeling Evolutionary Algorithms Simulation and Artificial Intelligence Faculty of Electrical and Electronics Engineering Ton Duc Thang University Ho Chi Minh city Viet Nam Posts and Telecommunications Institute of Technology Ho Chi Minh city Viet Nam VSB—Technical University of Ostrava Ostrava Czech Republic

ISBN: (纸本)9789819987023

The performance of two-way full-duplex communications with the help of reconfigurable intelligent surface (RIS) under phase noise is investigated in this work. Particularly, we study the outage probability, the average rate of each end-user, and the average sum rate of the whole network under both optimal phase-shift and random phase-shift design. simulation results via the Monte-Carlo method are given to confirm the advantages of the optimal design compared with the random one and to unveil the impact of some essential parameters such as the number of RIS elements, and the number of quantization bits on the system performance. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2024.

关键词： Phase noise

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丛书名： Lecture Notes in Networks and Systems

1000年

作者： Pandian Vasant Vladimir Panchenko Elias Munapo Gerhard-Wilhelm Weber J. Joshua Thomas Rolly Intan Mohammad Shamsul Arefin

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丛书名： Lecture Notes in Networks and Systems

1000年

作者： Pandian Vasant Vladimir Panchenko Elias Munapo Gerhard-Wilhelm Weber J. Joshua Thomas Rolly Intan Mohammad Shamsul Arefin

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丛书名： Lecture Notes in Networks and Systems

1000年

作者： Pandian Vasant Vladimir Panchenko Elias Munapo Gerhard-Wilhelm Weber J. Joshua Thomas Rolly Intan Mohammad Shamsul Arefin

ISBN: (数字)9783031508875

ISBN: (纸本)9783031508868

This book of;is another proof of Springer’s;on the lively interface of;It is a Master Piece of what our community of Academics and Experts can provide when an;is supported by;and Experience of the World-Leader;The 7th edition of;took place at Baitong Hotel & Resort on October 26–27, 2023, with tremendous support from the global research scholars across the planet. Objective was to celebrate “;” with researchers, scholars, experts and investigators in;across the globe,to share knowledge, experience and innovation—a marvelous opportunity for discourse and mutuality by novel research, invention and creativity.;This proceedings book of the 7th;is published by Springer Nature—

关键词： Computational intelligence artificial intelligence

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丛书名： Lecture Notes in Networks and Systems

1000年

作者： Pandian Vasant Vladimir Panchenko Elias Munapo Gerhard-Wilhelm Weber J. Joshua Thomas Rolly Intan Mohammad Shamsul Arefin