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Characteristic comparison between pi and hysteresis voltage control of high voltage unidirectional inverter for piezoelectric load using FPGA

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Transactions of the Korean Institute of Electrical Engineers 2017年第1期66卷 48-54页

作者： Kim, Ki-Seok Cho, Yong-Ho Kim, Hyeong-Seop Kang, Tae-Sam Hong, Sun-Ki Dept. of Information Control Engineering Hoseo University Korea Republic of Dept. of Digital Control Engineering Hoseo University Korea Republic of Dept. of Aero Space Information Engineering Konkuk University Korea Republic of

In this paper, hysteresis voltage control method is proposed to an unidirectional inverter control for piezoelectric load. Piezoelectric load has electrically RC characteristic, and is driven by the inverter to control the output voltage waveform. When controling the output waveform by PI control, appropriate gains need to be selected. However, hysteresis control may minimize the output distortion because it has maximum proportional gain. In addition, Hysteresis control algorithm has simple structure to realize and the response is fast. Although the switching frequency of the inverter by hysteresis control varies, the switching frequency for the piezoelectric load is lower than that by PI control for equivalent performance. In particular, on implementing the algorithm using FPGA, the algorithm can be implemented in fewer pabrics and the processing time can be reduced. The superiority of the proposed hysteresis voltage control was proved for piezoelectric load through simulation and experiment. Copyright © The Korean Institute of Electrical Engineers.

关键词： Field programmable gate arrays (FPGA)

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Fault detection based on H_∞ states observer for networked control systems

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Journal of systems engineering and Electronics 2009年第2期20卷 379-387页

作者： Zhu Zhangqing Jiao Xiaocheng Dept. of Control and System Engineering Nanjing Univ. Nanjing 210093 P. R. China

The influence of random short time-delay to networked control systems （NCS） is changed into an unknown bounded uncertain part. Without changing the structure of the system, an Hoo states observer is designed for NCS with short time-delay. Based on the designed states observer, a robust fault detection approach is proposed for NCS. In addition, an optimization method for the selection of the detection threshold is introduced for better tradeoff between the robustness and the sensitivity. Finally, some simulation results demonstrate that the presented states observer is robust and the fault detection for NCS is effective.

关键词： networked control systems fault detection states observers time-delays robustness

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A Comparison Study in Two PMaSynRels with Different Sintered Ferrite Shapes

A Comparison Study in Two PMaSynRels with Different Sintered...

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IEEE Workshop on Electrical Machines Design, control and Diagnosis (WEMDCD)

作者： Yuli Bao Shuo Wang Mauro Di Nardo Giampaolo Buticchi Michele Degano Zhenyao Xu Department of Electrical and Electronic Engineering University of Nottingham Ningbo China Ningbo China Nottingham Ningbo China Beacons of Excellence Research and Innovation Institute University of Nottingham Ningbo China Ningbo China Dept. of Electrical Engineering and Information Technology Politecnico di Bari Bari Italy Power Electronics Machine and Control Group (PEMC) University of Nottingham Nottingham UK School of Electrical Engineering Shenyang University of Technology Shenyang China

ISBN: (数字)9798331520748

ISBN: (纸本)9798331520755

Conventional permanent magnet assisted synchronous reluctance motors (PMaSynRels) are characterized by flux barriers partially filled with rectangular sintered ferrite, resulting in barrier shapes constrained to various rectangular combinations. For PMaSynRels with bonded ferrite, flux barriers could be completed filled, but the inferior magnetic properties of bonded ferrite restrict the performance of these PMaSynRels. Thus in the paper, two PMaSynRels with non-rectangular sintered ferrite are investigated and compared to explore the maximum torque potential. Through parameterization and optimization, the final two PMaSynRels are evaluated on torque, power factor, and efficiency across diverse operating conditions. The results prove that PMaSynRel with fluid-shaped sintered ferrite has lower torque ripple than PMaSynRel with circular-shaped sintered ferrite. In terms of power factor and efficiency, the two PMaSynRels do not differ significantly,

关键词： Ferrites Reactive power Torque Fluids Manufacturing processes Shape Permanent magnets Torque measurement Optimization Reluctance motors

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A novel explainable ECG classification with spatio-temporal transformers and hybrid loss optimization

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Biomedical Signal Processing and control 2025年 110卷

作者： Inam Abousaber Hany El-Ghaish Haitham F. Abdallah Dept. of Information Technology Faculty of Computers and Information Technology University of Tabuk Tabuk Saudi Arabia Dept. of Computer and Control Faculty of Engineering Tanta University 31526 Gharbiya Tanta Egypt Dept. of Electrical Engineering Higher Institute of Engineering and Technology Kafrelsheikh 33511 Egypt

This paper presents a novel deep learning framework for ECG arrhythmias detection, integrating Spatio-Temporal Adaptive Embedding (STAE) Transformers and Variational Autoencoders (VAEs) to improve classification accuracy and address class imbalance. Traditional ECG classification models struggle to capture long-range temporal dependencies and handle imbalanced datasets, leading to poor sensitivity for rare arrhythmias. The proposed system employs STAE Transformers to model intricate temporal and spatial relationships within ECG signals to overcome these challenges. At the same time, VAEs generate diverse and realistic ECG samples to enhance model generalization, particularly for underrepresented arrhythmias. Additionally, combining Focal Loss and Dice Loss, a Hybrid Loss Function further optimizes performance by focusing on hard-to-classify arrhythmias. The model is evaluated on the MIT-BIH Arrhythmias Database and PTB Diagnostic ECG Database using 5-fold cross-validation, achieving an accuracy of 99.56% and a macro F1-score of 95.40%, outperforming existing state-of-the-art methods, with a 3.5% improvement in sensitivity for rare arrhythmias. To ensure interpretability, SHapley Additive exPlanations (SHAP) and Gradient-weighted Class Activation Mapping (Grad-CAM) are utilized, highlighting the QRS complex and RR intervals as the most critical features and confirming that the model focuses on clinically relevant waveform regions. These results demonstrate the effectiveness of our approach in developing an accurate, interpretable, and robust deep learning system for ECG arrhythmias detection, paving the way for more reliable clinical decision support systems.

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Failure rate calculation using the mixture weibull distribution

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Transactions of the Korean Institute of Electrical Engineers 2017年第3期66卷 500-506页

作者： Chai, Hui-Seok Shin, Joong-Woo Lim, Tae-Jin Kim, Jae-Chul Dept. of Electrical Engineering Soongsil University Korea Republic of Dept. of Industrial Information System Engineering Soongsil University Korea Republic of

In 2014, ISO 55000s has been enacted and the power plant asset management is becoming a hot issue for all over the world. The asset management system is being developed as a combination of CBM(Condition Based Maintenance) and RCM(Reliability Centered Maintenance). Therefore, the research on the calculation of the failure rate which is the most basic index of RCM is actively carried out. The failure rate calculation has been going on for a long time, and the most widely used probability distribution is the Weibull distribution. In the Weibull distribution, the failure rate function is determined in three types according to the value of the shape parameter. However, the Weibull distribution has a limitation that it is difficult to apply it when the trend of failure rate changes-such as bathtub curves. In this paper, the failure rate is calculated using the mixture Weibull distribution which can appropriately express the change of the shape of the failure rate. Based on these results, we propose the necessity and validity of applying mixture Weibull distribution. Copyright © The Korean Institute of Electrical Engineers.

关键词： Failure rate

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Classification system Based on Data Mining Technique for Flat-Colored Textiles

SSRN

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SSRN 2025年

作者： Zhou, Min Lin, Yukai Hu, Wei Dai, Chai Tang, Guangfa He, Fei School of Information and Intelligent Engineering Guangzhou xinhua University Dongguan China School of Intelligent Control Hunan Railway Professional Technology College Zhuzhou China College of Electrical and Electrical Engineering Hunan University Changsha China Dept. of Pingdingshan Branch of China Mobile Communication Group Henan co. LTD Henan Pingdingshan China Dept.of Physics Electrical and Intelligent Manufacturing Huaihua University Changsha China College of Computer Science and Software Engineering Shenzhen University Shenzhen China

Manual visual inspection for defect detection in manufacturing can lead to high false positive rates. This paper compares data mining techniques for the binary classification of defects in flat products in a relatively open scenario. The background provides context on research into data mining-based detection. The methodology is divided into five sections: data collection, selection, preprocessing and transformation, classification, and model evaluation. Each section details the techniques applied, tailored to the application context, with specifying examples. Experiments apply real-world data sets self-collected from production lines. Statistics like prediction accuracy are generated by established data mining evaluation algorithms. Results indicate the efficacy of data mining for automated defect detection over manual approaches. Finally, conclusions summarize findings and discuss the limitations of the current research and planned future work to address the drawbacks. Overall, the formalized methodology and supportive experimental results demonstrate both the viability and potential areas of improvement for data mining in manufacturing quality control. © 2025, The Authors. All rights reserved.

关键词： Data accuracy

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Development of state estimation system with INS, magnetometer and carrier phase GPS for vehicle navigation

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Gyroscopy and Navigation 2014年第3期5卷 153-161页

作者： Kis, L. Lantos, B. Dept. of Control Engineering and Information Technology Budapest University of Technology and Economics Budapest Hungary

This paper presents a real-time state estimation system for vehicles using inertial sensors, magnetic sensors and GPS receivers with carrier phase measurement capability. The article concentrates on the precise attitude estimation. A real-time method for carrier phase integer ambiguity determination is described. The state estimation algorithm is a two level extended Kalman filter. The results are tested for real movement of a car and a sail-plane. © 2014 Pleiades Publishing, Ltd.

关键词： State estimation

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Pinching Antennas: Principles, Applications and Challenges

arXiv

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arXiv 2025年

作者： Yang, Zheng Wang, Ning Sun, Yanshi Ding, Zhiguo Schober, Robert Karagiannidis, George K. Wong, Vincent W.S. Dobre, Octavia A. Fujian Provincial Engineering Technology Research Center of Photoelectric Sensing Application Fujian Normal University Fuzhou350117 China School of Information and Control Engineering China University of Mining and Technology Xuzhou221116 China School of Computer Science and Information Engineering Hefei University of Technology Hefei230009 China Khalifa University Abu Dhabi United Arab Emirates University of Manchester ManchesterM1 9BB United Kingdom Germany Group Electrical & Computer Engineering Dept. Aristotle University of Thessaloniki Thessaloniki54 124 Greece Department of Electrical and Computer Engineering The University of British Columbia Vancouver Canada Department of Electrical and Computer Engineering Memorial University St. John’sNL Canada

Flexible-antenna systems, such as fluid antennas and movable antennas, have been recognized as key enabling technologies for sixth-generation (6G) wireless networks, as they can intelligently reconfigure the effective channel gains of the users and hence significantly improve their data transmission capabilities. However, existing flexible-antenna systems have been designed to combat small-scale fading in non-line-of-sight (NLoS) conditions. As a result, they lack the ability to establish line-of-sight links, which are typically 100 times stronger than NLoS links. In addition, existing flexible-antenna systems have limited flexibility, where adding/removing an antenna is not straightforward. This article introduces an innovative flexible-antenna system called pinching antennas, which are realized by applying small dielectric particles to waveguides. We first describe the basics of pinching-antenna systems and their ability to provide strong LoS links by deploying pinching antennas close to the users as well as their capability to scale up/down the antenna system. We then focus on communication scenarios with different numbers of waveguides and pinching antennas, where innovative approaches to implement multiple-input multiple-output and non-orthogonal multiple access are discussed. In addition, promising 6G-related applications of pinching antennas, including integrated sensing and communication and next-generation multiple access, are presented. Finally, important directions for future research, such as waveguide deployment and channel estimation, are highlighted. Copyright © 2025, The Authors. All rights reserved.

关键词： Channel estimation

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Observer-based Guidance Law Accounting for Second-order Dynamics of Missile Autopilots

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Journal of Harbin Institute of Technology(New Series) 2013年第1期20卷 17-22页

作者： Ping-Ping Qu Di Zhou Dept. of Control Science and Engineering Harbin Institute of Technology School of Electronics and Information Engineering Shenyang Aerospace University

Accounting for the missile autopilot as second-order dynamics, an observer-based guidance law is designed based on the dynamic surface control method. Some first-order low-pass filters are introduced into the design process to avoid the occurrence of high-order derivatives of the line of sight angle in the expression of guidance law such that it can be implemented in practical applications. The proposed guidance law is effective in compensating the bad influence of the autopilot lag on guidance accuracy. In the simulations of intercepting non maneuvering targets, targets with step acceleration, and targets with sinusoidal acceleration respectively, the guidance law is compared with the adaptive sliding mode guidance law in the presence of missile autopilot lag. The simulation results show that the proposed guidance law is able to guide a missile to accurately intercept a maneuvering target, even if it escapes in a great and fast maneuver and the autopilot has a relatively large lag.

关键词： missile guidance law dynamic surface control autopilot observer

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Design and simulation of an adaptive control system with application to excitation control of a synchronous generator

Design and simulation of an adaptive control system with app...

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22nd International Conference on Modelling Identification and control

作者： Filip, Ioan Prostean, Octavian Szeidert, Iosif Vasar, Cristian Dept. of Control System Engineering Politehnica University of Timisoara

ISBN: (纸本)0889863393

Starting with the Park's equations of the synchronous generator, the paper presents the principles followed to obtain nonlinear models that can be directly used for computer simulations using Matlab with Simulink package. Also there are presented some comparative studies about an adaptive controller with application to excitation control of a synchronous generator, functioning in active power load regime. To design the adaptive controller are taken into consideration the RLSE estimator (recursive least square error) and respectively an estimator based on Givens orthogonal transformation.

关键词： Adaptive control systems

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