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European control Conference (ECC)

作者： T. C. Ionescu O. V. Iftime I. Necoara Dept. of Automatic Control & Systems Eng. Politehnica Univ. of Bucharest Bucharest Romania Department of Economics Econometrics and Finance Faculty of Economics and Business University of Groningen Groningen The Netherlands Department of Automatic Control and Systems Engineering University Politehnica Bucharest Bucharest Romania

ISBN: (数字)9783907144022

ISBN: (纸本)9781728188133

In this paper we consider a minimal, linear, time-invariant (LTI) system of order n, large. Our goal is to compute an approximation of order ν 2 norm of the approximation error. For this, in the family of ν order parametrized models that match ν moments we impose ℓ+k linear constraints yielding a subfamily of models with ℓ poles and k zeros imposed. Then, in the subfamily of ν order models matching ν moments, with ℓ poles and k zeros imposed we propose an optimization problem that provides the model yielding the minimal H 2 -norm of the approximation error. We analyze the first-order optimality conditions of this optimization problem and compute explicitly the gradient of the objective function in terms of the controllability and the observability Gramians of the error system. We then propose a gradient method that finds the (optimal) stable model, with fixed ℓ poles and k zeros.

关键词： Mathematical model Computational modeling Poles and zeros Linear systems Biological system modeling

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Experiment on scalable multi-user twin-field quantum key distribution network

arXiv

引用

arXiv 2021年

作者： Zhong, Xiaoqing Wang, Wenyuan Mandil, Reem Lo, Hoi-Kwong Qian, Li Center for Quantum Information and Quantum Control Dept. of Physics University of Toronto TorontoONM5S 1A7 Canada Center for Quantum Information and Quantum Control Dept. of Electrical & Computer Engineering University of Toronto TorontoONM5S 3G4 Canada Department of Physics University of Hong Kong Pokfulam Road Hong Kong

Twin-field quantum key distribution (TFQKD) systems have shown great promise for implementing practical long-distance secure quantum communication due to its measurement-device-independent nature and its ability to offer fundamentally superior rate-loss scaling than point-to-point QKD systems. A surge of research and development effort in the last two years has produced many variants of protocols and experimental demonstrations. In terms of hardware topology, TFQKD systems interfering quantum signals from two remotely phase-locked laser sources are in essence giant Mach-Zehnder interferometers (MZIs) requiring active phase stabilization. Such configurations are inherently unsuitable for a TFQKD network, where more than one user-pair share the common quantum measurement station, because it is practically extremely difficult, if not impossible, to stabilize MZIs of largely disparate path lengths, a situation that is inevitable in a multi-user-pair TFQKD network. On the other hand, Sagnac interferometer based TFQKD systems exploiting the inherent phase stability of the Sagnac ring can implement asymmetric TFQKD, and are therefore eminently suitable for implementing a TFQKD network. In this work, we experimentally demonstrate a proof-of-principle multi-user-pair Sagnac TFQKD network where three user pairs sharing the same measurement station can perform pair-wise TFQKD through time multiplexing, with channel losses up to 58 dB, and channel loss asymmetry up to 15 dB. In some cases, the secure key rates still beat the rate-loss bounds for point-to-point repeaterless QKD systems, even in this network configuration. It is to our knowledge the first multi-user-pair TFQKD network demonstration, an important step in advancing quantum communication network technologies. © 2021, CC BY-NC-SA.

关键词： Quantum cryptography

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Dynamic Resilient Graph Games for State-Dependent Jamming Attacks Analysis on Multi-Agent Systems

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IFAC-PapersOnLine 2020年第2期53卷 3421-3426页

作者： Yurid Nugraha Ahmet Cetinkaya Tomohisa Hayakawa Hideaki Ishii Quanyan Zhu Dept. of Systems and Control Engineering Tokyo Institute of Technology Tokyo 152-8552 Japan Information Systems Architecture Science Research Division National Institute of Informatics Tokyo 101-8430 Japan Dept. of Computer Science Tokyo Insitute of Technology Yokohama 226-8502 Japan Dept. of Electrical and Computer Engineering New York University Brooklyn NY 11201 USA

A cybersecurity problem for a multi-agent consensus problem is investigated through a dynamic game formulation. Specifically, we consider a game repeatedly played between a jamming attacker and a defender. The attacker attempts to jam the links between a number of agents to delay their consensus. On the other hand, the defender tries to maintain the connection between agents by attempting to recover some of the jammed links with the goal of achieving faster consensus. In each game, the players decide which links to attack/recover and for how long to continue doing so based on a Lyapunov-like function representing the largest difference between the states of the agents. We analyze the subgame perfect equilibrium of the game and obtain an upper bound of the consensus time that is influenced by the strategies of the players. The results are illustrated with a numerical example.

关键词： Multi-agent systems Consensus problem Game theory Cybersecurity

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Improving of the control Quality by Root of the Growth Signal Error

Improving of the Control Quality by Root of the Growth Signa...

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Moscow Workshop on Electronic and Networking Technologies (MWENT)

作者： Vadim A. Zhmud Oleg V. Stukach Lubomir V. Dimitrov Hubert Roth Novosibirsk State Technical University Novosibirsk Russia Vice-Rector of Technical University of Sofia Sofia Bulgary Dept. of Automatic Control Engineering University of Siegen Siegen Germany

ISBN: (数字)9781728125725

ISBN: (纸本)9781728125732

The controller design for a high-order object prone to oscillations under sufficient of interest in automation and robotics is being solved. For the first time, the square root in the error growth detector used as a component for the cost function calculating unit is proposed. Justification for this proposal is given, and the effectiveness of such modification of the cost function is demonstrated on example of object. Software SimInTech was used for some calculations. It was shown that strong procedures of optimization are wide necessary for controller design.

关键词： Transient analysis Software Regulators Detectors Cost function Mathematical model

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Sensitive Order Selection via Identification of Regularized FIR Models with Impulse Response Preservation

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IFAC-PapersOnLine 2018年第15期51卷 197-202页

作者： Münker, Tobias Nelles, Oliver Automatic Control - Mechatronics Dept. Mechanical Engineering University of Siegen SiegenD-57068 Germany

The proposed modeling philosophy is called impulse response preserving (IRP) FIR modeling. It can be seen as a mixture of an OE and a FIR model combining the advantages and avoiding most drawbacks of both approaches. In the originally proposed approach via Gaussian processes a kernel needs to be established that expresses the prior knowledge about the process. The IRP approach is simpler, more straightforward, and much easier to understand, at least from a dynamic systems or controls point-of-view. The key prior information utilized by the IRP approach is the prior system order n. Therefore the topic of order selection is also addressed. The IRP approach is significantly more robust w.r.t. the selected order. However, an extension of IRP that ensures plausible poles during optimization allows for a sensitive order selection. © 2018

关键词： FIR filters Identification (control systems) Impulse response FIR model Gaussian Processes Order selection Prior information Prior knowledge regularization

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Enabling Conditions for the Deployment of Integrated Local Energy Communities in Europe

Enabling Conditions for the Deployment of Integrated Local E...

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Blockchain for Renewables Integration (BLORIN), Workshop on

作者： Martina Caliano Amedeo Buonanno Marialaura Di Somma Giorgio Graditi Christina Papadimitriou Chrysanthos Charalambous Przemysław Dopierała Leszek Bronk Dept. of Energy Technologies and Renewable Energy Sources ENEA Portici NA Italy Electrical Engineering dpt. Eindhoven University of Technology (TU/e) Eindhoven The Netherlands Department of Electrical and Computer Engineering University of Cyprus FOSS Research Centre for Sustainable Energy Nicosia Cyprus Department of Control Information and Communications Instytut Energetyki - Instytut Badawczy Gdansk Poland Department of Strategy and System Development Instytut Energetyki - Instytut Badawczy Gdansk Poland

ISBN: (纸本)9781665472500

The main goal of eNeuron H2020 project (Nov 2020-Oct. 2024, ID: 957779) is to develop innovative tools for the optimal design and operation of local energy communities, integrating distributed energy resources and multiple energy carriers at different scales. This paper presents a review study of the enabling conditions for the deployment of integrated local energy communities (ILECs) in Europe, performed within the project. The enabling conditions are addressed by defining the key actors and their interests in the implementation of an energy community at local level and through a detailed mapping of the enabling and emerging energy and information and communication technologies at both household and community levels. Special focus is also on mapping of the demand-side flexibility technologies to understand the benefits of local flexibility and impacts on the larger systems. In such analysis, the key issues for implementation and adaptation of this new energy paradigm are investigated through covering technological, socio-economic, environmental, and regulatory aspects.

关键词： Renewable energy sources Conferences Europe Information and communication technology Distributed power generation Blockchains

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On the Role of Models in Learning control: Actor-Critic Iterative Learning control

arXiv

引用

arXiv 2020年

作者： Poot, Maurice Portegies, Jim Oomen, Tom Control Systems Technology Group Dept. of Mechanical Engineering Eindhoven University of Technology Eindhoven Netherlands CASA Dept. of Mathematics and Computer Science Eindhoven University of Technology Eindhoven Netherlands

Learning from data of past tasks can substantially improve the accuracy of mechatronic systems. Often, for fast and safe learning a model of the system is required. The aim of this paper is to develop a model-free approach for fast and safe learning for mechatronic systems. The developed actor-critic iterative learning control (ACILC) framework uses a feedforward parameterization with basis functions. These basis functions encode implicit model knowledge and the actor-critic algorithm learns the feedforward parameters without explicitly using a model. Experimental results on a printer setup demonstrate that the developed ACILC framework is capable of achieving the same feedforward signal as preexisting model-based methods without using explicit model knowledge. Copyright © 2020, The Authors. All rights reserved.

关键词： Learning algorithms

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Modified indexing algorithm based on priority queue in metric space for MVP tree 4

Modified indexing algorithm based on priority queue in metri...

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4th International Conference on Future Networks and Distributed Systems, ICFNDS 2020

作者： Fomin, Vladimir Aleksandrov, Igor Gallyamov, Denis Kirichek, Ruslan Dept. of Information Systems Herzen State Pedagogical University of Russia Saint Petersburg Russia Dept. of Software Engineering and Computer Science Bonch-Bruevich Saint Petersburg State University of Telecommunications Saint Petersburg Russia Bonch-Bruevich Saint Petersburg State University of Telecommunications Saint Petersburg Russia V. A. Trapeznikov Institute of Control Sciences of Russian Academy of Sciences Moscow Russia

ISBN: (纸本)9781450388863

The Internet of Things (IoT) algorithms process huge amounts of heterogeneous data in real-time. One of the most computationally intensive tasks using cloud technologies is the task of clustering and classifying data. The authors propose to develop an approach to data classification within the "Query by Similarity"paradigm, which uses the technology of data indexing based on Metric Access Methods (MAM). To improve the performance of data indexing, this paper proposes a similar nearest neighbor search method combining a multiple vantage point tree (MVP) and improved algorithms for processing the priority queue of nodes. The following two algorithms for processing the priority queue of nodes were developed: 1) algorithm for all kinds of points-queries, which makes it possible to take into account parent nodes of all higher levels;2) algorithm for grouped based on clustering of points-queries by reusing previously obtained search results. Experimental results confirm the effectiveness of the proposed approaches and algorithms. © 2020 ACM.

关键词： Nearest neighbor search

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Capacitive sensor and its calibration- A technique for the estimation of solid particles flow concentration 2

Capacitive sensor and its calibration- A technique for the e...

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2nd International Conference on Clean Energy and Electrical Systems, CEES 2019

作者： Abrar, Usama Shi, Liu Jaffri, Nasif R. Li, Qin Omar, Mian W. Sindhu, Hassan R. School of Control and Computer Engineering North China Electric Power University Beijing102206 China School of Engineering and Digital Arts University of Kent United Kingdom Dept. of Computer Engineering Bahria University Islamabad Campus Pakistan Dept. of Electrical Engineering Edith Cowan University Joondalup PerthWA6027 Australia

The precise and accurate measurement of flow rate in the batch flow of the solid particles is of primary importance in many process industries for the improvement of the efficiency of the system. Many techniques developed for the measurement of mass flow rate. The capacitive sensors has a significance of being non-invasive, higher accuracy and low cost for mass flow measurement despite the fact that many factors adversely affect the performance- including non-uniform flow, multiphase flow, temperature, pressure, and moisture in the solid particles. This paper covers preliminary investigations of the offline estimation of mass flow concentration based upon the calibration of capacitance electrodes to quantify the mass of dielectric as a function of capacitance variation between the electrodes. © 2019 IOP Publishing Ltd. All rights reserved.

关键词： Calibration

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A Fault-Tolerant control Scheme for Fixed-Wing UAVs with Flight Envelope Integration

A Fault-Tolerant Control Scheme for Fixed-Wing UAVs with Fli...

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International Conference on Unmanned Aircraft Systems (ICUAS)

作者： Georgios Zogopoulos-Papaliakos George C. Karras Kostas J. Kyriakopoulos Control Systems Lab School of Mechanical Engineering National Technical University of Athens Greece Dept. of Computer Science and Telecommunications University of Thessaly Greece

ISBN: (数字)9781728142784

ISBN: (纸本)9781728142791

Fault-tolerant control is currently the most important step towards increased autonomy for Unmanned Aerial Vehicles (UAVs). In this work, we consider actuator and airframe faults in fixed-wing UAVs and show that an online Flight Envelope (FE) calculation can interpret their effect on the achievable trim trajectories. Subsequently, we design a fully integrated control scheme with a RRT-based planner and 3 Nonlinear Model Predictive control (MPC) layers. The FE is provided at each control layer with the beneficial result that non-trimmable, unstable trajectories are avoided. Results from high-fidelity simulations are provided.

关键词： Iron Aircraft Atmospheric modeling Trajectory Aerospace control Numerical models Aerodynamics

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