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IEEE Conference on Decision and Control

作者： Yorick Broens Hans Butler Roland Tóth Department of Electrical Engineering Eindhoven University of Technology Eindhoven The Netherlands ASML Veldhoven The Netherlands Systems and Control Laboratory Institute for Computer Science and Control Hungary

ISBN: (数字)9781665467612

ISBN: (纸本)9781665467629

The ever increasing need for performance results in increasingly rigorous demands on throughput and positioning accuracy of high-precision motion systems, which often suffer from position dependent effects that originate from relative actuation and sensing of the moving-body. Due to the highly stiff mechanical design, such systems are typically controlled using rigid body control design approaches. Nonetheless, the presence of position dependent flexible dynamics severely limits attainable position tracking performance. This paper presents two extensions of the conventional rigid body control framework towards active control of position dependent flexible dynamics. Additionally, a novel control design approach is presented, which allows for shaping of the full closed-loop system by means of structured H ∞ co-design. The effectiveness of the approach is validated through simulation using a high-fidelity model of a state-of-the-art moving-magnet planar actuator.

关键词： Linear systems Mechatronics Costs Control design Tracking Dynamics Observers

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SSRN

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SSRN 2024年

作者： Ren, Yingying Li, Qiuli Guo, Yangyang Pedrycz, Witold Xing, Lining Liu, Anfeng Song, Yanjie School of Computer Electronics and Information Guangxi University Nannig China Guangxi Key Laboratory of Multimedia Communications and Network Technology China China School of Systems Science Beijing Jiaotong University Beijing China Department of Electrical and Computer Engineering University of Alberta Edmonton Canada Systems Research Institute Polish Academy of Sciences Poland Faculty of Engineering and Natural Sciences Department of Computer Engineering Sariyer Istanbul Turkey School of Electronic Engineering Xidian University Xian China School of Electronic Engineering Central South University Changsha China College of Systems Engineering National University of Defense Technology Changsha China

With the rapid development of the satellite industry, the information transmission network based on communication satellites has gradually become a major and important part of the future satellite ground integration network. However, the low transmission efficiency of the satellite data relay back mission has become a problem that is currently constraining the construction of the system and needs to be solved urgently. Effectively planning the task of satellite ground networking by reasonably scheduling resources is crucial for the efficient transmission of task data. In this paper, we hope to provide a task execution scheme that maximizes the profit of the networking task for satellite ground network planning considering feeding mode (SGNPFM). To solve the SGNPFM problem, a mixed-integer planning model with the objective of maximizing the gain of the link-building task is constructed, which considers various constraints of the satellite in the feed-switching mode. Based on the problem characteristics, we propose a distance similarity-based genetic optimization algorithm (DSGA), which considers the state characteristics between the tasks and introduces a weighted Euclidean distance method to determine the similarity between the tasks. To obtain more high-quality solutions, different similarity evaluation methods are designed to assist the algorithm in intelligently screening individuals. The DSGA also uses an adaptive crossover strategy based on similarity mechanism, which guides the algorithm to achieve efficient population search. In addition, a task scheduling algorithm considering the feed-switching mode is designed for decoding the algorithm to generate a high-quality scheme. The results of simulation experiments show that the DSGA can effectively solve the SGNPFM problem. Compared to other algorithms, the proposed algorithm not only obtains higher quality planning schemes but also has faster algorithm convergence speed. The proposed algorithm improves data tra

关键词： Profitability

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On modal observers for beyond rigid body H∞ control in high-precision mechatronics

arXiv

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arXiv 2022年

作者： Broens, Yorick Butler, Hans Tóth, Roland The Department of Electrical Engineering Eindhoven University of Technology Eindhoven Netherlands ASML Veldhoven Netherlands The Systems and Control Laboratory Institute for Computer Science and Control Hungary

The ever increasing need for performance results in increasingly rigorous demands on throughput and positioning accuracy of high-precision motion systems, which often suffer from position dependent effects that originate from relative actuation and sensing of the moving-body. Due to the highly stiff mechanical design, such systems are typically controlled using rigid body control design approaches. Nonetheless, the presence of position dependent flexible dynamics severely limits attainable position tracking performance. This paper presents two extensions of the conventional rigid body control framework towards active control of position dependent flexible dynamics. Additionally, a novel control design approach is presented, which allows for shaping of the full closed-loop system by means of structured H∞ co-design. The effectiveness of the approach is validated through simulation using a high-fidelity model of a state-of-the-art moving-magnet planar *** Codes 37M15 © 2022, CC BY.

关键词： Closed loop systems

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Miniaturized MIMO Antenna Designed for Biomedical Telemetry System

Miniaturized MIMO Antenna Designed for Biomedical Telemetry ...

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Antennas and Propagation & USNC/URSI National Radio science Meeting

作者： Mohamed Benaissa Abdelhalim Chaabane Hussein Attia Telecommunications and Smart Systems Laboratory Faculty of Science and Technology Ziane Achour University of Djelfa Djelfa Algeria Laboratoire des Télécommunications-LT Université 8 Mai 1945 Guelma Guelma Algeria Electrical Engineering Department Interdisciplinary Research Center for Communication Systems and Sensing King Fahd University of Petroleum and Minerals Dhahran Saudi Arabia

ISBN: (数字)9798350369908

ISBN: (纸本)9798350369915

This research presents an ultra-miniaturized MIMO antenna system tailored for efficient operation within the 2.45 GHz of the industrial, scientific, and medical (ISM) band, specifically addressing the requirements of biomedical implants. The proposed MIMO antenna showcases exceptional compactness, occupying a small volume of 2.65 mm 3 (i.e., $4.9\ \text{mm} \times 4.5 \text{mm} \times 0.12\ \text{mm}$ ). This compact design is achieved through the strategic utilization of meandered resonators. Despite its highly miniaturized form and slotted ground ensuring high isolation between ports, the antenna system attains a good peak gain of -26.8 dB at 2.45 GHz. This achievement is particularly noteworthy, highlighting the antenna's suitability for biomedical telemetry systems. Additionally, the antenna exhibits omnidirectional radiation patterns. This characteristic ensures consistent and reliable signal coverage in diverse orientations, meeting the specific needs of the targeted application. The emphasis on ultra-miniaturization underscores the practicality of this antenna system and its potential applications in biomedical devices.

关键词： Antenna measurements Slot antennas Biomedical telemetry Volume measurement Conferences Implants Reliability Resonators Gain Antenna radiation patterns

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Improving the initialization speed for long-range NRTK in network solution mode

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science China(Technological sciences) 2020年第5期63卷 866-873页

作者： ZHANG Ming LÜJinHu BAI ZhengDong LIU Hui FAN ChengCheng Key Laboratory of Systems and Control Institute of Systems ScienceAcademy of Mathematics and Systems ScienceChinese Academy of SciencesBeijing 100190China School of Automation Science and Electrical Engineering Beihang UniversityBeijing 100191China Institute of Geomatics Tsinghua UniversityBeijing 100084China GNSS Research Center Wuhan UniversityWuhan 430079China Guangxi Zhuang Autonomous Region Remote Sensing Information Surveying and Mapping Institute Nanning 530023China

Initialization speed is one of the most important factors in network real time kinematic(NRTK)*** to the low correlation among the error sources of reference stations,it is difficult to fix reference station ambiguities of long-range NRTK *** traditional reference stations ambiguity resolution(AR)methods,baselines are usually solved independently which is called baseline solution(BS)mode in this *** the correlations among baselines are not taken into consideration in ambiguities estimation,the AR speed is ***,tens of minutes or longer time is required to *** propose a network solution(NS)mode approach,in which the correlations among the double-difference ambiguities(DDAs)as well as double-difference ionospheric delays(DDIDs)of different baselines are considered in estimating float ambiguity *** results show that the float ambiguity solutions obtained are more accurate with an improved ***,initialization speed is significantly increased by 18%in NS mode.

关键词： initialization speed network real time kinematic(NRTK) reference station ambiguity resolution(AR) network solution(NS)mode baseline solution(BS)mode

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Efficient Ultra-Compact Antenna for 2.45 GHz ISM Band Wireless Connectivity in Biomedical Devices

Efficient Ultra-Compact Antenna for 2.45 GHz ISM Band Wirele...

引用

International Conference on Image and Signal Processing and their Applications (ISPA)

作者： Mohamed Benaissa Abdelhalim Chaabane Djelloul Aissaoui Hussein Attia Telecommunications and Smart Systems Laboratory Faculty of Science and Technology Ziane Achour University of Djelfa Djelfa Algeria Laboratoire des Télécommunications-LT Université 8 Mai 1945 Guelma Guelma Algeria Electrical Engineering Department Interdisciplinary Research Center for Communication Systems and Sensing King Fahd University of Petroleum and Minerals Dhahran Saudi Arabia

ISBN: (数字)9798350309249

ISBN: (纸本)9798350309256

This study presents an innovative ultra-miniaturized antenna system designed for 2.45 GHz ISM band operation, tailored to the distinct requirements of biomedical implants. The proposed antenna boasts an exceptional level of compactness, with a mere 3.3 mm 3 in volume and physical dimensions of 3 mm × 3 mm × 0.37 mm. In a three-layer body model incorporating skin, fat, and muscle, the antenna system achieves an impressive peak gain of -25.4 dB at 2.45 GHz while maintaining a remarkable impedance bandwidth of -10 dB, spanning 33.8%. This accomplishment is particularly noteworthy, given the antenna’s compact design. Additionally, it exhibits outstanding omnidirectional radiation patterns. Furthermore, an evaluation and analysis of the antenna’s specific absorption rate (SAR) are conducted. These results emphasize the practicality and potential applications of this antenna system within biomedical devices.

关键词： Wireless communication Biological system modeling Implants Bandwidth Specific absorption rate Impedance Gain

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Micro-Stack Airborne P- and L-Band Sar Tomography for 3d Forest Mapping: Cross-Validation at Two Forest Sites in Hebei and Hainan, China

SSRN

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SSRN 2024年

作者： Wang, Longxiang Xiang, Wei Zhang, Heng Deng, Yunkai Song, Hongjun Wang, Jili Liu, Dacheng Lu, Hongliang Zhao, Lei Space Microwave Remote Sensing System Department Aerospace Information Research Institute Chinese Academy of Science Beijing100190 China School of Electronics Electrical and Communication Engineering University of Chinese Academy of Science Beijing100049 China Qilu Aerospace Information Research Institute Jinan250100 China Research Institute of Forest Resources Information Technique Chinese Academy of Forestry Beijing100091 China Key Laboratory of Forestry Remote Sensing and Information System National Forestry and Grassland Administration Chinese Academy of Forestry Beijing100091 China

The vertical structure and height of the forest are crucial for forest resource management and carbon stock. Tomographic Synthetic Aperture Radar (TomoSAR) technology effectively extracts precise three-dimensional (3D) forest information utilizing multi-baseline SAR image stacks. However, airborne TomoSAR implementation encounters several challenges. First, conventional TomoSAR imaging approaches require at least six acquisitions for a reasonable 3D reconstruction. Second, the instability of the flight trajectories could result in the interferograms decoherence. Third, excessive flight passes are laborious and inefficient, which is difficult for the large-scale 3D forest mapping. To overcome these limitations, this paper proposes a micro-stack TomoSAR imaging approach for forest height retrieval using the double iterative adaptive residual approach (DIARA). The DIARA is a spectral estimation approach based on iterative adaptation of inner and outer layers and residual optimization function, aiming to improve data processing efficiency and accuracy. To validate the effectiveness and robustness of the DIARA, micro-stack airborne P- and L-band SAR data are comprehensively analyzed to obtain tomograms and retrieve forest height in the Saihanba Forest Farm, Hebei, and the Diaoluoshan Nature Reserve, Hainan, China, respectively. Especially, the airborne L-band TomoSAR is applied to retrieve the vertical structure of tropical forests for the first time in *** DIARA significantly enhances the recovery of ground scattering signals and successfully detects the weak scatterers beneath dense forest canopy through residual processing. The LiDAR canopy height model (CHM) is used for comparison and evaluation. Furthermore, the four indicators R2, MAE, MAPE, and RMSE of the P-band TomoSAR result derived from only four acquisitions are 0.628, 0.625 m, 3.68%, and 0.771m, respectively. Similarly, the R2, MAE, MAPE, and RMSE of the L-band TomoSAR result are 0.837, 1.051 m, 6.709%

关键词： Synthetic aperture radar

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Motion Planning Integrated with Vehicle-Terrain Interactions for Off-Road Autonomous Ground Vehicles 27

Motion Planning Integrated with Vehicle-Terrain Interactions...

引用

27th IEEE International Conference on Intelligent Transportation systems, ITSC 2024

作者： Yin, Jianhua Zhan, Xianyuan Ji, Tianying Xu, Bingrong He, Yi Zhang, Daqing Li, Lingxi Wuhan University of Technology Intelligent Transportation Systems Research Center Wuhan430063 China Engineering Research Center of Transportation Information and Safety Ministry of Education Wuhan430063 China Chongqing Research Institute Wuhan University of Technology Chongqing China Institute for Ai Industry Research Tsinghua University Beijing100084 China Shanghai Artificial Intelligence Laboratory Shanghai200232 China Tsinghua University Department of Computer Science and Technology Beijing100084 China School of Automation Wuhan University of Technology Wuhan430070 China College of Mechanical and Electrical Engineering Hunan Agricultural University Changsha410128 China Sunward Intelligent Equipment Co. Ltd. Changsha410100 China Elmore Family School of Electrical and Computer Engineering College of Engineering Purdue University IN46202 United States

ISBN: (纸本)9798331505929

Off-road autonomous ground vehicles (AGVs) work in unstructured environments with varied elevation and deformable ground, where vehicle-terrain interactions are more complex resulting in unpredictable dynamics behavior. Current sensor-based hazards/obstacle identification methods mainly focus on geometric hazards/obstacles with explicit geometry, which might be adequate for vehicles in on-road conditions. However, in the off-road environment, vehicle-terrain interactions could introduce non-geometric hazards that cannot be detected by current geometric hazards-oriented sensing techniques, e.g. vehicle stuck in mud. To enable AGVs to traverse the target terrain and meet the goal while avoiding non-geometric hazards, this work proposes a motion planning method integrated with coupled vehicle-terrain dynamics response. Specifically, terramechanics-based modeling and simulation (M&S) is utilized to characterize vehicle-terrain interactions. Based on the dynamics response, a reinforcement learning (RL) algorithm with a specialized reward function is used to navigate the AGV to find the goal with high mobility and safety. We demonstrate the proposed method with two case studies, 1) high mobility is the foremost concern with less safety requirement, and 2) both high mobility and safety are required. The results show that the proposed motion planning method is effective for navigating the AGV in off-road terrains. © 2024 IEEE.

关键词： Off road vehicles

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Leveraging ASR Pretrained Conformers for Speaker Verification through Transfer Learning and Knowledge Distillation

arXiv

引用

arXiv 2023年

作者： Cai, Danwei Li, Ming The Department of Electrical and Computer Engineering Duke University DurhamNC27705 United States The Suzhou Municipal Key Laboratory of Multimodal Intelligent Systems Data Science Research Center Duke Kunshan University Kunshan China

This paper focuses on the application of Conformers in speaker verification. Conformers, initially designed for Automatic Speech Recognition (ASR), excel at modeling both local and global contexts within speech signals effectively. Previous research has established that ASR and speaker verification tasks can naturally complement each other. Building on this synergistic relationship, this study introduces three strategies for leveraging ASR-pretrained Conformers in speaker verification: (1) Transfer learning: We use a pretrained ASR Conformer encoder to initialize the speaker embedding network, thereby enhancing model generalization and mitigating the risk of overfitting. (2) Knowledge distillation: We distill the complex capabilities of an ASR Conformer into a speaker verification model. This not only allows for flexibility in the student mode's network architecture but also incorporates frame-level ASR distillation loss as an auxiliary task to reinforce speaker verification. (3) Parameter-efficient transfer learning with speaker adaptation: A lightweight speaker adaptation module is proposed to convert ASR-derived features into speaker-specific embeddings, without altering the core architecture of the original ASR Conformer. This strategy facilitates the concurrent execution of ASR and speaker verification tasks within a singular model. Experiments were conducted on VoxCeleb datasets. The results are compelling: models employing ASR pretraining and knowledge distillation significantly outperform standard Conformers. Specifically, the best model using the ASR pretraining method achieved a 0.43% equal error rate (EER) on the VoxCeleb1-O test trial, while the knowledge distillation approach yielded a 0.38% EER. Furthermore, by adding a mere 4.92 million parameters to a 130.94 million-parameter ASR Conformer encoder, the speaker adaptation approach achieved a 0.45% EER, enabling parallel speech recognition and speaker verification within a single ASR Conformer encoder.

关键词： Transfer learning

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Wireless control of a D.C. Motor Used for Driving a Conveyor Belt

Wireless control of a D.C. Motor Used for Driving a Conveyor...

引用

Circuit, systems and Communication (ICCSC), International Conference on

作者： Petru Livint Ioan-Viorel Banu George Culea Bouderbala Manale Btissam Majout Alexandru Dusa Department of Energetics and Science computer University “Vasile Alecsandri” of Bacau Romania LIMAS Laboratory Faculty of Sciences Dhar El Mahraz Sidi Mohammed Ben Abdellah University Fez Morocco Laboratory of Engineering Modellingand Systems Analysis Sidi Mohammed Ben Abdellah University Fez Morocco Department of Automatic and Electrical Engineering “Dunarea de Jos” University of Galati Romania

ISBN: (数字)9798350365306

ISBN: (纸本)9798350365313

This article presents an experimental stand for the remote control of a D.C. motor used to drive a conveyor belt. This is based on two development boards Arduino Uno and two shields NRF24L01. The D. C. motor is supplied from a D.C. voltage source by means of the H type bridge. The emitter circuit sends the control signal generated through a potentiometer to the receptor circuit by means of radio waves at a frequency of 2.4 GHz. The receptor circuit receives the analogue signal emitted by the emitting circuit, transforms it into a PWM (pulse width modulation) signal and uses it for controlling the transistors of the H-bridge. For implementing and validating the remote control system of the D.C. motor two programs have been issued in the programming environment Arduino IDE for the two circuits. emitter and receptor. The remote control system of the D.C. motor has been running in the same way as the direct control of this. The remote control is used in the case of the electric actuation systems made with D.C. motors continuous used in spaces inaccessible to the human operator.

关键词： Wireless communication Bridge circuits Transforms Pulse width modulation Potentiometers Motors Belts

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