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International Electrical engineering Congress (iEECON)

作者： Wallop Tipwong Adisorn Sirikham Jessada Konpang Putthiphong Kirdpipat Yutana Chongjarearn Oradee Preutisrunyanont Department of Electrical and Telecommunication Engineering Rajamangala University of Technology Krungthep Bangkok Thailand Department of Electrical and Computer Engineering Faculty of Engineering Thammasat School of Engineering Thammasat University Pathum Thani Thailand Department of Robotic Engineering and Automation System Dhurakij Pundit University Bangkok Thailand

ISBN: (数字)9798331543952

ISBN: (纸本)9798331543969

This study investigates the application of clustering algorithms to data collected from color sensors providing frequency signals during the cultivation process. Continuous sampling allowed for real-time data collection, and variations in temperature and humidity were observed to influence signal reception. The dataset's large volume and varying sample sizes necessitated the evaluation of several clustering models for efficient data processing. The experiment tested K-Means, K-Means++, Mini-Batch K-Means, and Bisecting K-Means algorithms. The results reveal that the computation time for each model increased with the number of groups. Specifically, the K-Means, K-Means++, and Mini-Batch K-Means models exhibited shorter computation times, ranging from 0.02 to 0.03 seconds for two-group scenarios, while the Bisecting K-Means algorithm took significantly longer, approximately 0.10 seconds. Despite the variation in processing times, all models performed similarly in terms of clustering quality, with an average Silhouette Score of 0.82. This score indicates that the algorithms effectively separated data points into well-defined groups while maintaining high accuracy in clustering. Additionally, the analysis highlighted the importance of balancing computation time and clustering quality, particularly as the number of clusters increases. These findings suggest that while computational efficiency may vary across models, the clustering quality remains robust, providing valuable insights for data analysis in agricultural sensor networks. The study's results demonstrate that each clustering model is capable of handling large datasets with high accuracy in grouping, making them applicable to real-world agricultural data processing scenarios. In conclusion, the experiment confirms that all tested models, despite differing in computation time, successfully partitioned the data with high-quality results, offering promising applications for data analysis and optimization in agricult

关键词： Temperature sensors Analytical models Image color analysis Computational modeling Clustering algorithms Approximation algorithms Data models Sensor systems Computational efficiency Optical sensors

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Comparison of Unsupervised Learning Algorithms for K-Means Clustering Efficiency in IoE Sensor Detection Systems for Smart Agriculture

Comparison of Unsupervised Learning Algorithms for K-Means C...

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13th International Electrical engineering Congress, iEECON 2025

作者： Tipwong, Wallop Sirikham, Adisorn Konpang, Jessada Kirdpipat, Putthiphong Chongjarearn, Yutana Preutisrunyanont, Oradee Rajamangala University of Technology Krungthep Department of Electrical and Telecommunication Engineering Bangkok Thailand Thammasat University Faculty of Engineering Thammasat School of Engineering Department of Electrical and Computer Engineering Pathum Thani Thailand Dhurakij Pundit University Department of Robotic Engineering and Automation System Bangkok Thailand

ISBN: (纸本)9798331543952

关键词： K-means clustering

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Phase Shift Effects Analysis on Radiation Pattern of a Ground Plane Antenna Array 16

Phase Shift Effects Analysis on Radiation Pattern of a Groun...

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16th International Conference on Development and Application Systems, DAS 2022

作者： Adomnitei, Cezar-Ion Lesanu, Cezar-Eduard Done, Adrian Dimian, Mihai Chiuchisan, Iulian Yu, Ang Stefan cel Mare University of Suceava Department of Computers Electronics and Automation Suceava Romania Carolina University Winston-Salem Electrical Engineering and Computer Science United States

ISBN: (纸本)9781665481625

This paper presents an analysis on the effect of the controlled phase shift introduced between feeding signals of an antenna array elements on modifying its radiation pattern shape. Following the idea of increasing measurements accuracy on phased antenna arrays, it was designed and built an antenna array containing two radiating telescopic elements located on a contiguous metal ground plane. All the hardware related to the functionality of the phased array was placed on the bottom of the ground plane. Even though the array was designed for the 915 MHz band, allocated to various useful satellite services, it is easily tunable in a wide range of other frequencies and also easily modifiable in a multi-element array, due to the design of the ground plane. This paper also shows a good agreement between the experimental results and those obtained from numerical simulations. © 2022 IEEE.

关键词： Beamforming

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Grey Box Non-Recursive System Identification for a Third Order Electro-Hydraulic Actuator System: From Simulation to Practical Approaches 20

Grey Box Non-Recursive System Identification for a Third Ord...

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20th IEEE International Colloquium on Signal Processing and Its Applications, CSPA 2024

作者： Soon, Chong Chee Ghazali, Rozaimi Ghani, Muhamad Fadli Liew, Siaw-Hong Teng, Howe Cheng Zulkipli, Nur Farhanah Beh, Chong You Hanaffi, Mohd Saidi Department Of Engineering And Built Environment Penang Branch Campus Pulau Pinang Malaysia Centre For Robotics And Industrial Automation Fakulti Teknologi Dan Kejuruteraan Elektrik Melaka Malaysia Universiti Kuala Lumpur Perak Malaysia Faculty Of Computer Science And Information Technology Sarawak Kota Samarahan Malaysia

ISBN: (纸本)9798350382310

engineering systems heavily rely on mathematical modeling, significantly influencing both system performance and the design of control systems. This paper thoroughly investigates the establishment of a third-order mathematical model for heavy machinery systems, with a specific emphasis on the ElectroHydraulic Actuator (EHA) system. The formulation of a double-acting EHA system model using a grey box system identification approach is outlined, encompassing the system's dynamics and behavior. In addition, the details of the EHA system experimental setup that is used for system identification are described. The identification process demonstrates promising performance, achieving an impressive accuracy of 89.1%, as highlighted in the results and discussion sections. © 2024 IEEE.

关键词： Hydraulic actuators

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Obstacle avoidance parking based on improved deep reinforcement learning SAC algorithm

Obstacle avoidance parking based on improved deep reinforcem...

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Chinese automation Congress (CAC)

作者： Ting Liu Ping Liu Mingjie Liu Changhao Piao Kyunghi Chang College of Automation Chongqing University of Posts and Telecommunications Chongqing China Electrical and Computer Engineering Department Inha University Incheon Republic of Korea

ISBN: (数字)9798350368604

ISBN: (纸本)9798350368611

Recent research uses neural-network-based approaches to generate time-optimized parking trajectories in linear time. However, the generalization of these neural networks in different parking lot scenarios is not fully considered and relies on high-quality data. To address these issues, this paper proposes an improved soft actor critic (SA C)-based parking trajectory planning method to achieve fast convergence and high success rate. A trajectory data-based reward function and an experience replay sampling strategy are designed simultaneously improve the learning efficiency. Meanwhile, the Flatten-T Swish Plus (FTSPlus) activation function is firstly introduced into the SAC's neural network structure to enhance the convergence capabilities. The simulation results show that compared with traditional SAC methods, the success rate has been greatly improved and convergence rate has also been improved by more than 60%. Furthermore, it has the good model generalization ability while maintaining collision-free traj ectories.

关键词： Training Space vehicles Trajectory planning Simulation Neural networks Deep reinforcement learning Trajectory Planning Convergence Testing

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Inertial Motion Tracking on Mobile and Wearable Devices:Recent Advancements and Challenges

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Tsinghua Science and Technology 2021年第5期26卷 692-705页

作者： Zhipeng Song Zhichao Cao Zhenjiang Li Jiliang Wang Yunhao Liu the School of Software Tsinghua UniversityBeijing 100084China the Department of Computer Science and Engineering Michigan State UniversityMichiganMI 48824USA the Department of Computer Science City University of Hong KongHong Kong 999077China the Department of Automation and the Global Innovation eXchange Institute(GIX) Tsinghua UniversityBeijing 100084China

Motion tracking via Inertial Measurement Units(IMUs)on mobile and wearable devices has attracted significant interest in recent ***-accuracy IMU-tracking can be applied in various applications,such as indoor navigation,gesture recognition,text input,*** efforts have been devoted to improving IMU-based motion tracking in the last two decades,from early calibration techniques on ships or airplanes,to recent arm motion models used on wearable smart *** this paper,we present a comprehensive survey on IMU-tracking techniques on mobile and wearable *** also reveal the key challenges in IMU-based motion tracking on mobile and wearable devices and possible directions to address these challenges.

关键词： Inertial Measurement Units(IMUs) motion tracking accelerometer gyroscope magnetometer sensor fusion

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SmartCooper: Vehicular Collaborative Perception with Adaptive Fusion and Judger Mechanism

SmartCooper: Vehicular Collaborative Perception with Adaptiv...

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IEEE International Conference on Robotics and automation (ICRA)

作者： Yuang Zhang Haonan An Zhengru Fang Guowen Xu Yuan Zhou Xianhao Chen Yuguang Fang Department of Automation Tsinghua University School of Electrical and Electronic Engineering Nanyang Technological University Department of Computer Science City University of Hong Kong Department of Electrical and Electronic Engineering The University of Hong Kong

ISBN: (数字)9798350384574

ISBN: (纸本)9798350384581

In recent years, autonomous driving has garnered significant attention due to its potential for improving road safety through collaborative perception among connected and autonomous vehicles (CAVs). However, time-varying channel variations in vehicular transmission environments demand dynamic allocation of communication resources. Moreover, in the context of collaborative perception, it is important to recognize that not all CAVs contribute valuable data, and some CAV data even have detrimental effects on collaborative perception. In this paper, we introduce SmartCooper, an adaptive collaborative perception framework that incorporates communication optimization and a judger mechanism to facilitate CAV data fusion. Our approach begins with optimizing the connectivity of vehicles while considering communication constraints. We then train a learnable encoder to dynamically adjust the compression ratio based on the channel state information (CSI). Subsequently, we devise a judger mechanism to filter the detrimental image data reconstructed by adaptive decoders. We evaluate the effectiveness of our proposed algorithm on the OpenCOOD platform. Our results demonstrate a substantial reduction in communication costs by 23.10% compared to the non-judger scheme. Additionally, we achieve a significant improvement on the average precision of Intersection over Union (AP@IoU) by 7.15% compared with state-of-the-art schemes.

关键词： Costs Collaboration Time-varying channels Information filters Road safety Resource management Vehicle dynamics

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Probabilistic Model Checking for IEC 61499: A Manufacturing Application

Probabilistic Model Checking for IEC 61499: A Manufacturing ...

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IEEE International Conference on Industrial Technology (ICIT)

作者： Irman Faqrizal Tatiana Liakh Midhun Xavier Gwen Salaün Valeriy Vyatkin CNRS Grenoble INP Inria LIG Univ. Grenoble Alpes Grenoble France Department of Computer Science Computer and Space Engineering Lulea Tekniska Universitet Sweden Department of Electrical Engineering and Automation Aalto University Espoo Finland

ISBN: (数字)9798350340266

ISBN: (纸本)9798350340273

The ever-increasing complexity of industrial control systems generates a demand for reliable development methods. IEC 61499, a recent industrial standard, helps to develop complex distributed systems based on their positive characteristics, namely reusability, reconfigurability, interoperability, and portability. Formal verification techniques, such as model checking, have been proposed to ensure the correctness of these systems during the design time. However, they do not consider the presence of the environment that can impact the application behaviour at runtime. This work combines design time and runtime analyses to apply probabilistic model checking on an IEC-61499-based manufacturing application. We present several probabilistic properties to be checked. The results are visualised graphically to be analysed, which allows one to optimise the system's quantitative features, such as productivity.

关键词： Productivity Visualization Runtime Industrial control Model checking Probabilistic logic Manufacturing

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Lyapunov-based event-triggered control for nonlinear plants subject to disturbances and transmission delays

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Science China(Information Sciences) 2020年第5期63卷 146-160页

作者： Xiaoda HU Hao YU Fei HAO The Seventh Research Division School of Automation Science and Electrical EngineeringBeihang University The Department of Electrical and Computer Engineering University of Alberta

This paper studies event-triggered control for disturbed nonlinear systems. A new dual-stage Lyapunov-based event-triggering condition is proposed to cope with the time-varying transmission *** the first stage, the ratio of Lyapunov function values at the last two triggering instants is *** based on the ratio, the corresponding threshold function is selected from two candidate forms. It is proved that the designed event-triggered control system is input-to-state practically stable with respect to the measurement errors and disturbances. Moreover, Zeno behavior is excluded successfully by calculating the lower bound of the minimum inter-event times. Finally, a simulation example is provided to show the feasibility and the effectiveness of the proposed approach.

关键词： event-triggered control nonlinear systems networked control systems disturbed systems transmission delays

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Modelling and simulation of a commercially available dielectric elastomer actuator

arXiv

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arXiv 2023年

作者： Sohlbach, Lukas Hobbani, Hamza Blase, Chistopher Perez-Peña, Fernando Schmidt, Karsten Department of Computer Science and Engineering Frankfurt University of Applied Sciences Frankfurt/Main Germany The Department of Automation Electronics and Computer Architecture and Networks School of Engineering University of Cadiz Cadiz Spain

In order to fully harness the potential of dielectric elastomer actuators (DEAs) in soft robots, advanced control methods are needed. An important groundwork for this is the development of a control-oriented model that can adequately describe the underlying dynamics of a DEA. A common feature of existing models is that always custom-made DEAs were investigated. This makes the modelling process easier, as all specifications and the structure of the actuator are well known. In the case of a commercial actuator, however, only the information from the manufacturer is available and must be checked or completed during the modelling process. The aim of this paper is to explore how a commercial stacked silicone-based DEA can be modelled and how complex the model should be to properly replicate the features of the actuator. The static description has demonstrated the suitability of Hooke's law. In the case of dynamic description, it is shown that no viscoelastic model is needed for control-oriented modelling. However, if all features of the DEA are considered, the generalized Kelvin-Maxwell model with three Maxwell elements shows good results, stability and computational efficiency. © 2023, CC BY-NC-SA.

关键词： Elastomers

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