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International Conference on Unmanned Aircraft Systems (ICUAS)

作者： Viní cius Pacheco Bacheti Alexandre Santos Brandã o Má rio Sarcinelli-Filho Graduate Program on Electrical Engineering Federal University of Esp&#x00ED rito Santo Brazil Department of Electrical Engineering Federal University of Vi&#x00E7 osa Brazil

ISBN: (数字)9781665405935

ISBN: (纸本)9781665405942

This paper addresses the problem of package delivery by a drone taking off of a ground vehicle, flying towards a desired delivery point and flying back to land on the ground vehicle. Specifically, the final step, when the drone approaches the ground vehicle and lands on it is dealt with here. To do that a ground mobile robot, a Pioneer 3-DX unicycle platform, is used to play the role of the delivery truck, whereas the drone is the Bebop 2 quadrotor. To control such a formation the leader-follower control paradigm is adopted, in which the Pioneer 3-DX is the leader and the quadrotor is the follower, which mimics the movement of the leader. According to such a control paradigm, the two vehicles are independently controlled. A first controller is responsible for the leader and a second one is responsible for the follower. Aiming at a package delivery application, the leader robot is programmed to follow a given path, thus playing the role of a delivery truck, whereas a trajectory-tracking controller is designed for the follower, having the leader as the trajectory to be tracked. Therefore, the leader-follower control paradigm fits quite well the application in mind, which is the reason for this proposal. Simulation results considering such a system are presented here, which validate the proposed approach.

关键词： Simulation MIMICs Autonomous aerial vehicles Land vehicles Trajectory Proposals Mobile robots

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A High Efficiency Hybrid Modular Multilevel Converter with a SiC Device-Based External Shaping Module

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IEEE Transactions on Power electronics 2025年

作者： Ren, Peng Guo, Qi Hou, Yuchao Tu, Chunming Zhu, Donghai Sun, Kai Wang, Lei Xiao, Fan Hunan University College of Electrical and Information Engineering Changsha410082 China Tsinghua Shenzhen International Graduate School Shenzhen518000 China Huazhong University of Science and Technology State Key Laboratory of Advanced Electromagnetic Technology School of Electrical and Electronic Engineering Wuhan430074 China Tsinghua University State Key Lab of Power Systems Department of Electrical Engineering Beijing100084 China

In order to improve the waveform quality and efficiency of medium voltage modular multilevel converter (MMC), a hybrid MMC (HMMC) topology with an external shaping module is proposed. Each arm of the HMMC consists of N half-bridge submodules (HSMs) based on Si IGBT, while a full-bridge submodule (FSM) based on SiC MOSFET on the ac side. Furthermore, a 2N+1 level hybrid modulation strategy is proposed for this topology. The HSMs operate in the low-frequency state to output the staircase wave voltage, while the FSM operates in the high-frequency state to reduce the harmonics of the output voltage. It makes full use of the advantages of low on-state loss of Si devices and low switching loss of SiC devices. Additionally, the energy fluctuation of the HMMC submodules is analyzed in detail, and a voltage balancing scheme is proposed. In the end, the feasibility and effectiveness of the proposed topology and modulation method are validated by simulation and experimental studies on a single-phase HMMC. Moreover, the comparison of cost and loss between HMMC and existing MMCs proves that the proposed HMMC can better balance the device cost and operating loss. © 1986-2012 IEEE.

关键词： Silicon carbide

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Is Attention All You Need for EEG to Predict Neurological Outcomes in Cardiac Arrest?

Is Attention All You Need for EEG to Predict Neurological Ou...

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2024 IEEE-EMBS International Conference on Biomedical and Health Informatics, BHI 2024

作者： Dionisio, Jefferson Rizwan, Muhammad Suzuki, Hidetaka Hassan, Kazi Mahmudul Chanpornpakdi, Ingon Lin, Lian-Yu Tanaka, Toshihisa Lin, Che Tokyo University of Agriculture and Technology Tokyo Japan Japanese Red Cross Musashino Hospital Department of Emergency and Critical Care Tokyo Japan National Taiwan University College of Medicine and Hospital Division of Cardiology Department of Internal Medicine Taipei Taiwan Artificial Intelligence of Things Taiwan International Graduate Program Academia Sinica Taipei Taiwan National Taiwan University Department of Electrical Engineering Taipei Taiwan Graduate Institute of Communication Engineering National Taiwan University Taipei Taiwan National Taiwan University Center for Advanced Computing and Imaging in Biomedicine Taipei Taiwan Department of Smart Medicine and Health Informatics National Taiwan University Taipei Taiwan

ISBN: (纸本)9798350351552

Sudden cardiac arrest (SCA) poses a significant health challenge, necessitating accurate predictions of neurological outcomes in comatose patients, where good outcomes are defined as the recovery of most cognitive functions. Electroencephalogram (EEG) serves as a valuable biomarker for monitoring neurological states due to its rich, time-dependent information. This study aims to predict neurological outcomes using early EEG data by employing the Transformer model, which leverages multi-headed attention to identify patterns in lengthy sequences such as hour-long EEG recordings. Unlike traditional methods that use subsampled EEG epochs, we utilize the entire EEG sequences, subdivided into time steps, allowing our model to capture detailed temporal patterns via the attention mechanism. Moreover, we trained our proposed model using each EEG recording as an individual data sample but evaluated our model through aggregated patient-wise predictions. This approach allows us to boost the data sample size. Our results demonstrate promising predictive performance, achieving an AUROC of 0.82 and AUPRC of 0.90 on the holdout test set and an AUROC of 0.73 and AUPRC of 0.93 on an external test set with patient-wise predictions. This study highlights the potential of utilizing attention mechanisms to capture important time series progressions across EEG sequences for improving SCA prognosis. © 2024 IEEE.

关键词： Electroencephalography

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Tikhonov Regularization Based Control Allocation for Underactuated Input-Affine Systems

Tikhonov Regularization Based Control Allocation for Underac...

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IEEE Latin American Robotics Symposium, LARS

作者： Júnio Eduardo de Morais Daniel N. Cardoso Guilherme V. Raffo Graduate Program in Electrical Engineering Universidade Federal de Minas Gerais Belo Horizonte Brazil Dept. of Electrical Engineering Universidade Federal de Minas Gerais Belo Horizonte Brazil Dept. of Electronic Engineering Universidade Federal de Minas Gerais Belo Horizonte Brazil

This paper proposes a novel control allocation method for underactuated input-affine nonlinear mechanical systems, based on the Tikhonov regularization. A hardware-in-the-loop experiment is conducted using an unmanned aerial manipulator to corroborate the effectiveness of the proposed method. The results demonstrate that, in comparison with the classic Moore-Penrose pseudo-inverse control allocation method, the proposed Tikhonov regularization-based control allocation is computationally faster and attenuates additive noise terms within the generalized input vector. Besides, it reduces the residual error between the desired and applied generalized input when the input coupling matrix is ill-posed.

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Capacity Planning of Access Point Deployment for Indoor Positioning System

Capacity Planning of Access Point Deployment for Indoor Posi...

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2021 International Conference on Power, Energy and Innovations, ICPEI 2021

作者： Thitinaruemit, Aphirak Sitjongsatapom, Suchada Prongnuch, Sethakarn Mahanakorn University of Technology The Electrical Engineering Graduate Program Faculty of Engineering and Technology Bangkok Thailand Faculty of Engineering and Technology Dept. of Electronic Engineering Bangkok Thailand Suan Sunandha Rajabhat University Faculty of Industrial Technology Dept. of Computer Engineering Bangkok Thailand

ISBN: (纸本)9781665402163

This paper present the network design and capacity planning of access point (AP) deployment for indoor positioning system. The estimation of WiFi distance is described briefly how to measure the signal strength of AP. Co-channel interference is a key for network design of access point installation for network capacity. The objective function for network capacity planning of AP deployment is to optimize the number of access point and location for indoor positioning system concerning with the minimized co-channel interference. Simulations are tested to install AP for lecture hall in university. Capacity planning design of wireless AP deployment is proposed for indoor position systems in terms of the received signal strength indications (RSSI). We assume the situation is supported for the crowded conference. The requirement of the results of wireless AP positioning in crowded conference rooms are placing the wireless AP in forms of overlap the signal in order to get the strong signal. Experimental results have been tested their received signal of WiFi APs with the 2.4GHz frequency using the receiver installed in laptops to check the signal. The empirical results shown that the strength of RSSI will be received a signal of -44 dBm at a distance of approximately 20 meters. © 2021 IEEE.

关键词： Signal receivers

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A Study on Giant Magnetostrictive Actuator for Interior Sound Control System of the Ultra-Compact Mobility: Fundamental Consideration on Formation of the Giant Magnetostrictive Phases Depending on Heat Treatment Condition 27

A Study on Giant Magnetostrictive Actuator for Interior Soun...

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27th International Conference on electrical Machines and Systems, ICEMS 2024

作者： Kato, Taro Naganuma, Ryusei Bando, Koki Sawada, Kentaro Wenbao, Wu Kobayashi, Ikkei Kuroda, Jumpei Uchino, Daigo Ogawa, Kazuki Ikeda, Keigo Endo, Ayato Kato, Hideaki Narita, Takayoshi Furui, Mitusaki Tokyo University of Technology Department of Mechanical Engineering 1404-1 Katakura Hachioji-shi Tokyo192-0982 Japan Sustainable Engineering Program Graduate School of Engineering Tokyo University of Technology 1404-1 Katakura Hachioji-shi Tokyo192-0982 Japan Tokai University Kitakaname 4-1-1 Kanagawa Hiratsuka-shi259-1292 Japan Tokai University Kitakaname 4-1-1 Kanagawa Hiratsuka-shi259-1292 Japan Numazu College Department of Mechanical Engineering Ohoka 3600 Shizuoka Numazu-shi410-0022 Japan Aichi University of Technology Department of Electronic Robotics 50-2 Manori Nishisako-machi Aichi Gamagori-shi443-0047 Japan Hokkaido University of Science Department of Mechanical Engineering 7-Jo 15-4-1 Maeda Teine Hokkaido Sapporo006-8585 Japan Fukuoka Institute of Technology Department of Electrical Engineering Wajiro Higashi 3-30-1 Higashi-ku Fukuoka Fukuoka-shi811-0295 Japan Tokai University Department of Mechanical System Engineering Kitakaname 4-1-1 Kanagawa Hiratsuka-shi259-1292 Japan

ISBN: (纸本)9784886864406

An active noise control system using giant magnetostrictive actuator has been proposed as a countermeasure for interior noise of the ultra-compact mobilities, which is a new transportation tools. In this paper, as basic research toward the development of the proposed giant magnetostrictive actuator for active noise control, we conduct experiments on the material properties when terbium, dysprosium, and iron powder, which make up the giant magnetostrictive material, are mixed and the heat treatment conditions are changed. In this study, the heat treatment temperature was varied from 800°C to 1100°C in 100°C incrementsbased on the equilibrium state temperature of each material, and the heat treatment time was set in 30-minute increments from 1 hour to 3 hours. As a result, TbFe2 was confirmed after heat treatment at an electric furnace temperature of 1000°C for 3 hours, although its strength was insufficient. © 2024 The Institute of electrical Engineers of Japan.

关键词： Active noise control

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A Wideband Bandpass Power Divider with Improved Isolation Performance 4

A Wideband Bandpass Power Divider with Improved Isolation Pe...

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4th International Applied Computational Electromagnetics Society Symposium in China, ACES-China 2021

作者： Gao, Xin Zhang, Nan Wang, Xiaolong Ma, Jian Chen, Chun-Ping Ma, Zhewang College of Electronic Science and Engineering Jilin University Changchun China Kanagawa University Department of Electrical Electronics and Information Engineering Yokohama Japan Graduate School of Science and Engineering Saitama University Saitama Japan

ISBN: (纸本)9781733509619

With improved isolation performance, a wideband bandpass power divider is newly reported. Four transmission zeros of S-{22} and S-{23} can be got, and the amplitude of both S-{22} and S-{23} can be controlled below -20 dB by adding an extra isolation resistor. The mathematical conditions are presented, the several design examples are listed, and the S-parameters of different cases are compared. For verification, a wideband power divider is shown with text{FBW} =78% at f-{0}=2.5 text{GHz}. © 2021 Applied Computational Electromagnetics Society (ACES).

关键词： Scattering parameters

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Experimental Evaluation of a Lightweight and Backdrivable Powered Knee Prosthesis for Transfemoral Amputees

Experimental Evaluation of a Lightweight and Backdrivable Po...

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Colombian Caribbean Conference (C3), IEEE

作者： Pedro Ulhoa Guilherme Fiorezi Teodiano Filho Rafhael Andrade Department of Electrical Engineering Universidade Federal do Espírito Santo Vitória Brazil Department of Mechanical Engineering Universidade Federal do Espírito Santo Vitória Brazil Graduate Program in Electrical Engineering Universidade Federal do Espírito Santo Vitória Brazil Graduate Program in Mechanical Engineering Universidade Federal do Espírito Santo Vitória Brazil

Rehabilitation of amputees is still mostly limited to passive technology that cannot provide energy to the gait and contribute to a better experience and comfort of walking. To address this shortcoming, active prostheses have been introduced with actuators capable of generating and dissipating energy in a controlled way. However, proposed designs of powered leg prosthesis still present heavy and bulky structure or low backdrivable actuators, which reduce the volitional control and comfort of the user. This work presents the development and control of a lightweight and highly backdrivable powered knee prosthesis. The designed actuator is composed by a coaxial motor-reducer with a 200 W brushless DC motor in series with a harmonic drive with a 51:1 ratio. After assembled the leg prosthesis weights just 3.64 kg. Bench tests were performed to validate the model and tune a position-based controller. Then, a custom force sensor was implemented to measure ground reaction force and identify gait phases so an impedance controller can regulate joint torque. The powered prosthesis was experimented in three able-bodied subjects walking on a treadmill using both the position and impedance controller. The prosthesis presented high backdrivability in bench tests and the treadmill results shown that the proposed impedance controller was more effective to follow the healthy knee trajectory compared to the position controller. In future works we plan to evaluate the prosthesis in amputee subjects.

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Loading Pressure Effects on the Bonded Interface Structure in Atomic Diffusion Bonding Using Thick Au Films

Loading Pressure Effects on the Bonded Interface Structure i...

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IEEE International Workshop on Low Temperature Bonding for 3D Integration (LTB-3D)

作者： K. Noguchi M. Uomoto T. Shimatsu Frontier Research Institute for Interdisciplinary Sciences (FRIS) Tohoku University Sendai Japan Department of Electronic Engineering Graduate School of Engineering Tohoku University Sendai Japan Research Institute of Electrical Communication (RIEC) Tohoku University Sendai Japan

Atomic diffusion bonding (ADB) using Au(300 nm) film on each side was examined. With 20 MPa loading pressure, ADB in air of wafers was successful. Results indicated grain growth occurring at the bonded interface along... 详细信息

ISBN: (数字)9798331519919

ISBN: (纸本)9798331519926

关键词： Gold Annealing Pressure effects Conferences Loading Diffusion bonding Bonding Three-dimensional integrated circuits

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Energy Harvesting Design for Cooperative Reconfigurable Intelligent Surface with Multi-Agent Deep Reinforcement Learning

Energy Harvesting Design for Cooperative Reconfigurable Inte...

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Intelligent Data and Security (IDS), IEEE International Conference on

作者： Yihang Tao Jun Wu Qianqian Pan Xiuzhen Chen School of Electronic Information and Electrical Engineering Shanghai Jiao Tong University Shanghai China Graduate School of Information Production and Systems Waseda University Fukuoka Japan Department of Systems Innovation School of Engineering the University of Tokyo Tokyo Japan

ISBN: (数字)9798350389487

ISBN: (纸本)9798350389494

Cooperative reconfigurable intelligent surface (Cooperative- RIS)-assisted communication systems have been proven to provide more smart computing and communication ability than single-RIS or multi-distributed-RIS systems regarding beamforming gain and channel diversity. However, the increased number of deployed RISs brings heavier energy consumption, which makes the cooperative- RIS system less sustainable. The majority of previous works mainly study energy harvesting (EH) for single- RIS systems which cannot be directly applied to the cooperative- RIS systems. In this paper, we study the EH for cooperative- RIS-assisted communication systems. Specifically, we first model the cooperative beamforming and EH optimization as a non-convex problem. Besides, we propose a multi-agent deep deterministic policy gradient (MADDPG)-based EH efficiency maximization scheme for cooperative RISs while satisfying an acceptable sum rate. Finally, experimental results show the effectiveness of our proposed scheme.

关键词： Energy consumption Communication systems Array signal processing Simulation Optimization methods Reconfigurable intelligent surfaces Deep reinforcement learning

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