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63rd IEEE Conference on Decision and control, CDC 2024

作者： Liu, Changrui Shi, Shengling De Schutter, Bart Delft University of Technology Delft Center for Systems and Control Delft Netherlands Massachusetts Institute of Technology Department of Chemical Engineering Cambridge United States

ISBN: (纸本)9798350316339

Model mismatch often presents significant challenges in model-based controller design. This paper investigates model predictive control (MPC) for uncertain linear systems with input constraints, where the uncertainty is characterized by a parametric mismatch between the true system and its estimated model. The main contributions of this work are twofold. First, a theoretical performance bound is derived using relaxed dynamic programming. This bound provides a novel insight into how the prediction horizon and modeling errors affect the suboptimality of the MPC controller to the oracle infinite-horizon optimal controller, which has complete knowledge of the true system. Second, sufficient conditions are established under which the nominal MPC controller, which relies solely on the estimated system model, can stabilize the true system despite model mismatch. Numerical simulations are presented to validate these theoretical results, demonstrating the practical applicability of the derived conditions and bounds. These findings offer practical guidelines for achieving desired modeling accuracy and selecting an appropriate prediction horizon in designing certainty-equivalence MPC controllers for uncertain linear systems. © 2024 IEEE.

关键词： Predictive control systems

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Predictive control Scheme Compensation in Feed-Forward control Scheme for Interleaved Connected PFC Power Converter System 9

Predictive Control Scheme Compensation in Feed-Forward Contr...

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9th International Conference on control, Decision and Information Technologies, CoDIT 2023

作者： Javed, Khalid Vandevelde, Lieven De Belie, Frederik Ghent University Eedt Decision & Control Flanders Make Department of Electromechanical Systems and Metal Engineering Ghent Belgium

ISBN: (纸本)9798350311402

A buck-boost converter is used chiefly for PFC purposes in power electronics converter systems because the voltage regulation in a PFC converter can easily be made using a buck-boost converter. In this paper, using the differential equations of a buck-boost converter, an already obtained feed-forward control method is extended into the predictive control method. The purpose of compensating a predictive control is to tackle white noise interference better by improving the technique of the PWM generation process in a way that the PWM signals are generated at once for each half cycle for the unity power factor. An interleaved case of two buck-boost converters is considered for this study. Implementing the predictive control into feed-forward control significantly increases the system's power factor by reducing the total harmonic distortion, even in terms of noise interfering with the feedback signals. The system achieves high efficiency by using interleaved connected low voltage-rated MOSFETs. The validation of our scheme is performed with the help of using MATLAB/Simulink. © 2023 IEEE.

关键词： Buck-Boost converter

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Low Inertia in Ac Microgrid: Analysis and Enhancement 6

Low Inertia in Ac Microgrid: Analysis and Enhancement

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6th International Youth Conference on Radio Electronics, Electrical and Power engineering, REEPE 2024

作者： Emad, Mazen Alhasheem, Mohamed Beshr, Eman Medical Services Sector Ministry of Interior Electrical Power Systems Department Cairo Egypt Aastmt Faculty of Engineering and Technology Electrical and Control Department Cairo Egypt

ISBN: (纸本)9798350382891

This research looks into electrical grids that will soon likely become more intelligent. In light of this, there is a growing need for intelligent, adaptable microgrids that can function both independently and in conjunction with the grid. Black start operation, frequency and voltage stability, active and reactive power flow regulation, active power filtering capabilities, and storage energy management are the features that these small grids are expected to have. Energy can be produced and stored in this way near its points of consumption, improving reliability and lowering losses from big power lines. The key ideas about intelligent microgrid configuration, control, and energy management are reviewed in this study. Attributes-wise, the microgrid can function by utilizing the following three primary hierarchical control levels, just like the main grid.: Primary control on the converter level, Secondary control to adjust the frequency and voltage of the AC grid, and Third-level control over additional global duties determine whether energy is imported or exported for the microgrid. when connected to the main utilities. Advancing one of the above-mentioned control levels or redesigning the microgrid can enhance the stand-alone ac microgrid inertia. © 2024 IEEE.

关键词： Smart power grids

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A Review of Evaluation Metrics Algorithmic Used in Scholarly Research Recommender System 4

A Review of Evaluation Metrics Algorithmic Used in Scholarly...

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4th International Multidisciplinary Information Technology and engineering Conference, IMITEC 2024

作者： Ovono, Gerald Zuva, Travos Otunniyi, Temidayo Faculty of Applied and Computer Sciences Department of Computer South Africa VaalUniversity of Technology Faculty of Engineering and Technology Department of Process Control and Computer Systems South Africa

ISBN: (纸本)9798350387988

The exponential growth of academic publications has made scholarly research recommender systems indispensable tools for researchers. These systems rely on diverse evaluation metrics to assess their effectiveness and relevance. This paper provides a comprehensive review and analysis of these metrics, categorizing them into accuracy, ranking, diversity, user-centric, coverage, temporal, and computational metrics. By employing a mixed-methods approach, combining systematic literature review and empirical analysis, we identify the prevalence and application of these metrics across various scholarly domains such as literature, conferences, and reviewers. Our findings highlight the widespread use of traditional metrics like precision, recall, and Fl-score, while emphasizing the growing importance of novel metrics such as unexpectedness and serendipity, especially in literature and conference recommendations. We also underscore the domain-specific nature of metric selection, with user-centric evaluations more prominent in literature recommendations, and ranking-focused metrics dominant in conference and reviewer recommendations. Furthermore, the study reveals a significant gap in the use of temporal and computational metrics, suggesting key areas for future research. This review offers valuable insights for researchers and practitioners, guiding them in metric selection and highlighting potential directions for enhancing the effectiveness, adaptability, and user satisfaction of scholarly recommender systems. © 2024 IEEE.

关键词： Algorithms Evaluation Metrics Novelty Recommender systems Scholarly Research Serendipity

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The First Five Years of a Phase Theory for Complex systems and Networks

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IEEE/CAA Journal of Automatica Sinica 2024年第8期11卷 1728-1743页

作者： Dan Wang Wei Chen Li Qiu Division of Decision and Control Systems KTH Royal Institute of TechnologyStockholm 10044Sweden Department of Mechanics and Engineering Science&the State Key Laboratory for Turbulence and Complex Systems Peking UniversityBeijing 100871China Hong Kong University of Science and Technology Hong KongChinaand also with the Southern University of Science and TechnologyShenzhen 518055China

In this paper,we review the development of a phase theory for systems and networks in its first five years,represented by a trilogy:Matrix phases and their properties;The MIMO LTI system phase response,its physical interpretations,the small phase theorem,and the sectored real lemma;The synchronization of a multi-agent network using phase *** the end,we also summarize a list of ongoing research on the phase theory and speculate what will happen in the next five years.

关键词： Consensus and synchronization matrix phases multi-agent systems phase theory sectored real lemma small phase theorem.

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Higher-order properties and extensions for indirect MRAC and APPC of linear systems

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Science China(Information Sciences) 2024年第4期67卷 218-238页

作者： Yanjun ZHANG Zhipeng ZHANG Jian SUN Lei WANG Kangkang ZHANG National Key Lab of Autonomous Intelligent Unmanned Systems Beijing Institute of Technology School of Automation Beijing Institute of Technology Beijing Institute of Technology Chongqing Innovation Center College of Control Science and Engineering Zhejiang University Department of Electrical and Electronic Engineering Imperial College London KIOS Research and Innovation Center of Excellence University of Cyprus

Recently, a reference derived some new higher-order output tracking properties for direct model reference adaptive control（MRAC） of linear time-invariant（LTI） systems: limt→∞ e（i）（t） = 0, i = 1,..., n*-1, where n*and e（i）（t） denote the relative degree of the system and the i-th derivative of the output tracking error, respectively. However, a naturally arising question involves whether indirect adaptive control（including indirect MRAC and indirect adaptive pole placement control） of LTI systems still has higher-order tracking properties. Such properties have not been reported in the literature. Therefore, this paper provides an affirmative answer to this question. Such higher-order tracking properties are new discoveries since they hold without any additional design conditions and, in particular, without the persistent excitation condition. Given the higher-order properties, a new adaptive control system is developed with stronger tracking features.（1） It can track a reference signal with any order derivatives being unknown.（2） It has higher-order exponential or practical output tracking properties.（3） Finally, it is different from the usual MRAC system, whose reference signal's derivatives up to the n*order are assumed to be known. Finally, two simulation examples are provided to verify the theoretical results obtained in this paper.

关键词： higher-order tracking indirect adaptive control model reference adaptive control adaptive pole placement control

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A Novel Rotor Switching Theory for Optimizing Small Vertical Axis Wind Turbine Performance: Insights from Experimental Study 4

A Novel Rotor Switching Theory for Optimizing Small Vertical...

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4th IEEE International Conference on Electrical, Computer, and Energy Technologies, ICECET 2024

作者： Irawan, Elysa Nensy Yamashita, Ken-Ichiro Fujita, Goro Functional Control Systems Shibaura Institute of Technology Tokyo Japan Salesian Polythecnic Department of Electrical Engineering Tokyo Japan Shibaura Institute of Technology Department of Electrical Engineering Tokyo Japan

ISBN: (纸本)9798350395914

In recent years, research on hybrid Savonius-Darrieus has significant attention within the wind energy sector. According to earlier research, this hybrid can produce higher torque at low tip speed ratios than a solo Darrieus model. However, as tip speed ratio increase, hybrids tend to perform lower than solo Darrieus. This study introduces an innovative paradigm termed rotor switching theory. It suggests switching from hybrid to solo Darrieus rotation at higher tip speed ratio for the turbine. Current study is conducted experimentally using testing models of small hybrid Savonius-Darrieus and solo Darrieus turbines. The internal rotor consists of two stages of Savonius turbines with a 0.2 overlap and a bucket angle of 135°, each having two blades. The external rotor features a NREL S809 Darrieus airfoil with a 5 cm cord length and three blades. Outer radius is 10 cm and its height is 15.4 cm. The experiments are conducted within an open-circuit wind tunnel with the wind speed variations of 3 - 12 m/s. Based on the results, the intersection of the moment and power coefficient graphs for both the hybrid and solo Darrieus occurs at TSR 1.7. When reaching this condition, switching the turbine rotation state from hybrid to solo Darrieus can offer advantages. By employing this concept, the turbine will achieve an expected initial power coefficient that is 150% better than the solo Darrieus and a maximum power coefficient that is 21% greater than the hybrid model. © 2024 IEEE.

关键词： Windmill

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Robust control and Unified Operation of Integrated Fuel Cell Electric Vehicle and Supercapacitor 25

Robust Control and Unified Operation of Integrated Fuel Cell...

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25th IEEE International Conference on Industrial Technology, ICIT 2024

作者： Eltoum, M. A Mohammed Jacknoon, Aman Khan, Khalid Khalid, Muhammad Control & Instrumentation Engineering Department Saudi Arabia Kfupm Electrical Engineering Department Dhahran31261 Saudi Arabia Irc For Sustainable Energy Systems Kfupm Dhahran31261 Saudi Arabia

ISBN: (纸本)9798350340266

The slow response rate of fuel cells (FC) proves to hinder the progression of fuel cell hybrid electric vehicles (FCHEVs). In this paper, a unified robust nonlinear control technique is designed for FCHEV-integrated supercapacitors (SC). Therefore, the FCHEV's requirements can be systematically balanced between FC with high energy density and SC with high power density. Accordingly, the hybrid energy storage system enables better driving range as well as a comparatively lower weight than battery-based electric vehicles. The proposed control technique utilizes feedback linearization in combination with sliding mode control to mitigate the impact of system uncertainties with minimal tracking error. The efficacy is demonstrated based on the presented DC-bus voltage regulation, SC current, and FC current. © 2024 IEEE.

关键词： Sliding mode control

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Exploration of Unknown Environment using Deep Reinforcement Learning

Exploration of Unknown Environment using Deep Reinforcement ...

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2023 International Conference on Robotics and Automation in Industry, ICRAI 2023

作者： Ali, Asad Gul, Sarah Mahmood, Tallat Ullah, Anayat Control Automotive and Robotics Lab Rawalpindi Pakistan Balochistan University of IT Engineering and Management Sciences Department of Electrical Engineering Quetta Pakistan

ISBN: (纸本)9781665464727

Exploring the unknown environment is a very crucial task where human life is at risks like search and rescue operations, abandoned nuclear plants, covert operations and more. Autonomous robots could serve this task efficiently. The existing methods use uncertainty models for localization and map building to explore the unknown areas requiring high onboard computation and time. We propose to use Deep Reinforcement Learning (DRL) for the autonomous exploration of unknown environments. In DRL, the agent interacts with the environment and learns based on experiences (feedback/reward). We propose extrinsic and curiosity-driven reward functions to explore the environment. The curiosity-based reward function motivates the agent to explore unseen areas by predicting future states, while the extrinsic reward function avoids collisions. We train the differential drive robot in one environment and evaluate its performance in another unknown environment. We observe curiosity-driven reward function outperformed the extrinsic reward by exploring more areas in the unknown environment. The test results show the generalization capability to explore unknown environments with the proposed methods. © 2023 IEEE.

关键词： Mobile robots

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Customer Attitudes Toward Circular Economy in the E-Waste Context: A Survey Assessing Sustainable Consumption Dynamics

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IEEE engineering management Review 2023年第4期51卷 28-45页

作者： Jabbour, Charbel Jose Chiappetta Colasante, Annarita D'Adamo, Idiano Rosa, Paolo Sassanelli, Claudio NEOMA Business School Department Information Systems Supply Chain and Decision Making Mont-Saint-AignanCedex 76130 France Unitelma Sapienza-University of Rome Department of Law and Economics Rome00161 Italy Sapienza University of Rome Department of Computer Control and Management Engineering Rome00185 Italy Politecnico di Milano Department of Management Economics and Industrial Engineering Milan20133 Italy Politecnico di Bari Department of Mechanics Mathematics and Management Bari70125 Italy

Waste from electrical and electronic equipment (WEEE) is a relevant concern in Europe. Even if relevant improvements have been made in terms of material recovery technologies and policy measures, there remains a significant gap between the amount of WEEE generated versus collected in the EU. This study is based on an online survey whose aim was to assess the attitude of students (i.e., individuals who dispose with a higher frequency electronic product) to buy/substitute three iconic product types (i.e., smartphones, notebooks, televisions), and their openness toward circular practices (i.e., recycling, reconditioning, reuse). Results have shown that: a) new products represent the greatest market share, b) reliability and quality were the most significant factors influencing the purchase decision in all product types, and c) circular premium was not recognized by students for any product type. From a social perspective, a responsible consumption pattern emerged, though a sustainability bias was evident with respect to products' residual value. From an economic perspective, these findings may inform companies about the orientation of young consumers and provide key insights for new business strategies. Results suggest that a proper waste management strategy also requires a behavioral change of people who should adopt it. © 1973-2011 IEEE.

关键词： Electronic Waste

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