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4th International Conference on Communication, Computing and Electronics Systems, ICCCES 2022

作者： Karnavas, Yannis L. Chatzipapas, Nikolaos V. Electrical Machines Laboratory Department of Electrical and Computer Engineering Democritus University of Thrace Xanthi671 00 Greece

ISBN: (纸本)9789811977527

The objective of this work is to design, develop and demonstrate optimized fuzzy controllers for processes presenting nonlinearities such as coreless DC micromotors speed control problems, in order to improve the overall control system performance. One type-1 fuzzy logic controller (FLC) and one type-2 FLC (both Tagashi-Sugeno based) were designed and implemented in real time to improve motor speed control performance. For this purpose, a high-end microcontroller was used in which the developed controllers where embedded. The parameters of the input and the output membership functions of the proposed FLCs were optimally tuned using a well-known optimization algorithm, i.e., the particle swarm optimizer (PSO). A comparison of type-1 and type-2 Tagashi-Sugeno fuzzy control architectures is performed in different experimental scenarios and the relevant results are discussed and analyzed. The results demonstrate that type-2 FLC exhibits very satisfactory motor driving capability, providing zero overshoot, faster rise time and low settling time. © 2023, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： DC motors

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A Novel Technology for Semiautomatic and Automatic Stem–Stake Coupling of Seedlings and Plants

IEEE Transactions on AgriFood Electronics

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IEEE Transactions on AgriFood Electronics 2025年第1期3卷 254-262页

作者： Shirzi, Moteaal Asadi Kermani, Mehrdad R. Western University Advanced Robotics and Mechatronic Systems Laboratory Electrical and Computer Engineering Department LondonN6A 5B9 Canada Western University Department of Electrical and Computer Engineering LondonN6A 3K7 Canada Advanced Robotics and Mechatronic Systems Laboratory LondonN6A 5B9 Canada

This article introduces a novel mechatronic system for coupling the stems of seedlings and plants to wooden stakes or ropes, a crucial process for supporting them during growth, transportation, and fruiting in plant propagation facilities and greenhouses. The stem–stake coupling device utilizes interconnected mechanisms and an impedance control method to adjust motor torque and speed, shaping metallic wire into clips of various shapes and dimensions, effectively securing plant stems to stakes or ropes. In a robotic system, a claw-shaped arm mechanism, a stereo camera, and real-time vision techniques are integrated into the stem–stake coupling device to identify the optimal coupling point and automate the coupling task. This innovation addresses the labor-intensive task of manual coupling, offering a scalable solution for growers through handheld devices or fully automated robotic systems. In the context of increasing labor shortages and rising costs, the technology offers a sustainable and efficient alternative with significant potential to enhance operational efficiency in greenhouses and propagation facilities. © 2023 IEEE.

关键词： Seed

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Developments and trends in emergency lighting systems: from energy-efficiency to zero electrical power consumption

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Life Cycle Reliability and Safety engineering 2024年第2期13卷 129-145页

作者： Abdelmoumene, Abdelkader Bentarzi, Hamid Iqbal, Atif Krama, Abdelbasset Qatar Airways Group -HIA Doha Qatar Signals and Systems Research Laboratory IGEE Boumerdes University Boumerdes Algeria Department of Electrical Engineering Qatar University Doha Qatar Department of Electrical and Computer Engineering Texas A & amp

Emergency lighting systems are an essential component of building safety infrastructure and play a critical role in ensuring the safety of people during power outages or other emergencies. As energy efficiency and environmental sustainability continue to be a focus in building design and construction, there is a growing interest in developing emergency lighting systems that not only reduce energy consumption but also operate on zero electrical power. This paper presents a comprehensive review of emergency lighting systems, with a focus on energy efficiency and zero electrical power consumption. The study first examines traditional lighting systems such as incandescent bulbs and their limitations in terms of energy consumption and efficiency. Then discusses energy-efficient options (CFLs and LED lighting), which have significantly improved energy efficiency and reduced power consumption. It also explores the latest generation of emergency lighting systems (Tritium and Photoluminescent), which have zero electrical power consumption throughout their lifetime and provide long-lasting illumination without the need for external electrical sources. Additionally, the paper presents a detailed comparative study of the energetic, environmental, economic, and life cycle assessment of the different emergency lighting technologies. The results of the study revealed that the use of Power Free emergency lighting signs not only reduces the installation and maintenance cost but also eliminates utter energy consumption and greenhouse gas (GHG) emissions. © The Author(s), under exclusive licence to Society for Reliability and Safety (SRESA) 2024.

关键词： Emergency lighting Energy efficiency Green building Life cycle assessment Smart design Zero electrical power

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22nm FDSOI Forward Body Biasing in Designing Ultra-Low Power, High PSRR Voltage Reference for IoT Power Management Applications 38

22nm FDSOI Forward Body Biasing in Designing Ultra-Low Power...

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38th IEEE Region 10 Conference, TENCON 2023

作者： Comaling, Robert M. Diangco, Mike Martin C. Hora, Jefferson A. Mindanao State University Iligan Institute of Technology Microelectronics Laboratory Department of Electrical Engineering and Technology Iligan9200 Philippines

ISBN: (纸本)9798350302196

This paper presents a novel approach to voltage reference design, harnessing the bulk biasing technique in 22nm Fully Depleted Silicon-on-Insulator (FDSOI) technology. The proposed architecture exhibits ultra-low power consumption of 95.28 nW while having a dissipating supply current of 157 nA and a high Power Supply Rejection Ratio (PSRR) of more than -100 dB, realized through an all-MOSFET construction where TC compensation of PTAT and CTAT voltage generators is adopted. A temperature coefficient of 22.22ppm/oC is achieved over wide temperature range from -450C to 100′ C with an output voltage VREF of 351 mV. With the growing demand for efficient, low-power, and compact solutions in Internet of Things (IoT) power management, this development contributes a significant step forward in the domain. © 2023 IEEE.

关键词： Silicon on insulator technology

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Feedback Optimization of Nonlinear Strict-Feedback Systems

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Journal of Systems Science & Complexity 2025年第2期38卷 717-738页

作者： LIU Tong LIU Tengfei JIANG Zhong-Ping Department of Electrical and Computer Engineering New York University State Key Laboratory of Synthetical Automation for Process Industries Northeastern University

Feedback optimization aims at regulating the output of a dynamical system to a value that minimizes a cost function. This problem is beyond the reach of the traditional output regulation theory, because the desired value is generally unknown and the reference signal evolves according to a gradient flow using the system's real-time output. This paper complements the output regulation theory with the nonlinear small-gain theory to address this challenge. Specifically, the authors assume that the cost function is strongly convex and the nonlinear dynamical system is in lower triangular form and is subject to parametric uncertainties and a class of external disturbances. An internal model is used to compensate for the effects of the disturbances while the cyclic small-gain theorem is invoked to address the coupling between the reference signal, the compensators, and the physical system. The proposed solution can guarantee the boundedness of the closed-loop signals and regulate the output of the system towards the desired minimizer in a global sense. Two numerical examples illustrate the effectiveness of the proposed method.

关键词： Feedback optimization internal model output regulation small-gain theorem

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Fixed-time-synchronized control: a system-dimension-categorized approach

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Science China(Information Sciences) 2023年第7期66卷 177-194页

作者： Wanyue JIANG Shuzhi Sam GE Dongyu LI Institute for Future & Shandong Key Laboratory of Industrial Control Technology School of Automation Qingdao University Department of Electrical and Computer Engineering National University of Singapore School of Cyber Science and Technology Beihang University Shanghai Institute of Satellite Engineering

This study addresses the fixed-time-synchronized control problem of perturbed multi-input multioutput(MIMO) systems. In the task of fixed-time-synchronized control, different dimensions of the output signal in MIMO systems are required to reach the desired value simultaneously within a fixed time *** MIMO system is categorized into two cases: the input-dimension-dominant and the state-dimensiondominant cases. The classification is defined according to the dimension of system signals and, more importantly, the capability of converging at the same time. For each kind of MIMO system, sufficient Lyapunov conditions for fixed-time-synchronized convergence are explored, and the corresponding robust sliding mode controllers are designed. Moreover, perturbations are compensated using the super-twisting technique. The brake control of the vertical takeoff and landing aircraft is considered to verify the proposed method for the input-dimension-dominant case, which shows the essential advantages of decreasing the energy consumption and the output trajectory length. Furthermore, comparative numerical simulations are performed to show the semi-time-synchronized property for the state-dimension-dominant case.

关键词： fixed-time-synchronized convergence sliding mode control perturbed MIMO systems

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Assessing the Viability of AC to DC Microgrid Conversion: A Comprehensive Analysis of Technical and Economic Factors 59

Assessing the Viability of AC to DC Microgrid Conversion: A ...

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59th International Universities Power engineering Conference, UPEC 2024

作者： Charalambous, Chrysanthos Polycarpou, Alexis Efthymiou, Venizelos Georghiou, George E. University of Cyprus Pv Technology Laboratory Department Of Electrical and Computer Engineering Cyprus Phaethon Centre of Excellence for Intelligent Efficient and Sustainable Energy Solutions Nicosia Cyprus Frederick University Department of Electrical Computer Engineering and Informatics Nicosia Cyprus

ISBN: (纸本)9798350379730

In the face of global warming and the acceleration of climate changes, urgent and decisive measures must be taken to mitigate these phenomena. This study addresses this urgent need by exploring the transition from traditional AC distribution systems to more efficient DC and hybrid AC/DC systems, recognizing the utmost importance of both technical developments and economic considerations. Through a thorough overview of existing literature and empirical knowledge gathered from the nanogrid of FOSS Research Centre for Sustainable Energy of University of Cyprus, this research clarifies the inherent advantages of DC and AC/DC hybrid systems. In addition, it presents a detailed case study for the comprehensive assessment of the feasibility and effectiveness of these systems. The preliminary economic analysis carried out in this study demonstrates the cost-effectiveness and performance improvements offered by hybrid AC/DC microgrids compared to conventional AC configurations. According to the findings of this work it is obvious that the ROI increases with the increase of DC loads over AC loads until the case where DC loads reach the 75% of the total load (ROI=13.9%). However, even in the case of Full DC microgrid, the ROI is higher by 1% compared to the case of Full AC microgrid thus significantly reducing the payback period. These findings not only underline the urgency of the transition to more efficient and sustainable energy distribution systems, but also provide valuable information for policymakers, industry stakeholders and researchers. By embracing these innovative technologies, a more resilient and environmentally responsive energy infrastructure can be promoted that is in line with the demands of a rapidly changing global climate. © 2024 IEEE.

关键词： Clean energy

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Netlist Compaction IR Drop Simulation Flow for Mixed Signal Power Integrity Analysis

Netlist Compaction IR Drop Simulation Flow for Mixed Signal ...

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2024 Panhellenic Conference on Electronics and Telecommunications, PACET 2024

作者： Michailidis, A. Topalidis, E. Noulis, T. Pavlidis, V.F. Hatzopoulos, A. Aristotle University of Thessaloniki Electronics Laboratory Department of Physics 54124 Greece Aristotle University of Thessaloniki Electronics Laboratory Department of Electrical and Computer Engineering 54124 Greece

ISBN: (纸本)9798350318845

In this work, a novel netlist compaction methodology was proposed and exploited as to speed-up the power integrity simulations of mixed signal SoC. The proposed methodology surpasses the time-domain non-linear simulations by introducing small-signal linear approximation approaches, thus accelerating the IR drop simulation procedure. As a digital cell, two ring-oscillators, oscillating at different frequencies, were implemented as the basic digital logic cell, using a 22 nm FDSOI CMOS process and, for simulation purposes, an array of digital cells was synthesized. In the top-level simulation scheme, both PCB and package models were included along with the PDN parasitics, as to improve the accuracy of the simulation. The presented methodology provides a significant netlist compaction technique while enabling power integrity simulations in large-scale digital circuits. © 2024 IEEE.

关键词： Compaction

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A 4-bit 28-GS/s 4×Time-Interleaved Current-Steering DAC for High-Speed Interfacing

A 4-bit 28-GS/s 4×Time-Interleaved Current-Steering DAC for...

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2024 Panhellenic Conference on Electronics and Telecommunications, PACET 2024

作者： Michailidis, A. Noulis, T. Pavlidis, V.F. Hatzopoulos, A. Aristotle University of Thessaloniki Electronics Laboratory Department of Physics 54124 Greece Aristotle University of Thessaloniki Electronics Laboratory Department of Electrical and Computer Engineering 54124 Greece

ISBN: (纸本)9798350318845

In this work, a fully integrated 4-bit current-steering DAC was implemented into silicon using a 22nm SoI CMOS process node. By exploiting the time-interleaved design approach, a sampling frequency of 28-GS/s was achieved, enabling high-speed interfacing capabilities between analog and digital circuitry. The time-interleaved design approach, proposed in this work, uses an insightful current superposition technique, extending the time-interleaved factor barrier while maintaining high signal integrity and high conversion linearity, without compromising the spectral content of the output signal. For validation purposes of the proposed design approach, RLCk-aware parasitic extraction of the physical layout using Ansys RaptorX was employed and RLCk-aware simulations of the full design were performed. The performance degradation due to physical layout parasitics was compared with the schematic-view simulation scheme of the full design and it was quantified by monitoring the ENOB, SINAD and SFDR dynamic metrics of the design. © 2024 IEEE.

关键词： current superposition current-steering DAC time-interleaved transconductance amplifiers

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Crosstalk Impact on CMOS Low Noise Amplifiers from RF to millimeter Wave

Crosstalk Impact on CMOS Low Noise Amplifiers from RF to mil...

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2024 Panhellenic Conference on Electronics and Telecommunications, PACET 2024

作者： Themeli, R. Zachos, N. Noulis, T. Pavlidis, V.F. Hatzopoulos, A. Aristotle University of Thessaloniki Electronics Laboratory Department of Physics 54124 Greece Aristotle University of Thessaloniki Electronics Laboratory Department of Electrical and Computer Engineering 54124 Greece

ISBN: (纸本)9798350318845

This work addresses crosstalk effects on three low noise amplifiers (LNAs) operating at different frequency bands, the S-band (2.4 GHz), the Ka-band (28 GHz), and the V-band (56 GHz). The LNAs were implemented using a 22nm FDSOI process and were extracted both as stand-alone circuits and considering operation onto the same die. The passive components were extracted using Ansys RaptorX. As to address the consequences of crosstalk on the LNA performance specific performance metrics, such as gain (S21), input matching (S11), noise figure (NF), linearity (1 dB Compression Point and Third Point Intercept) and power dissipation (Pdc), were studied for each frequency band LNA and compared with their performance when they were operating onto the same die. © 2024 IEEE.

关键词： Crosstalk

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