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Nonlinear control systems - A brief overview of historical and recent advances

Nonlinear engineering 2017年第4期6卷 301-312页

作者： Iqbal, Jamshed Ullah, Mukhtar Khan, Said Ghani Khelifa, Baizid Ćuković, Saša Department of Electrical Engineering FAST National University of Computer and Emerging Sciences Islamabad Pakistan Department of Electrical Engineering MY University Islamabad Pakistan Department of Mechanical Engineering College of Engineering Yanbu Taibah University Saudi Arabia Department of Computer Science and Automatic Control Mines-Telecom Institute France Faculty of Engineering University of Kragujevac Kragujevac Serbia

Last five decades witnessed remarkable developments in linear control systems and thus problems in this subject has been largely resolved. The scope of the present paper is beyond linear solutions. Modern technology demands sophisticated control laws to meet stringent design specifications thus highlighting the increasingly conspicuous position of nonlinear control systems, which is the topic of this paper. Historical role of analytical concepts in analysis and design of nonlinear control systems is briefly outlined. Recent advancements in these systems from applications perspective are examined with critical comments on associated challenges. It is anticipated that wider dissemination of this comprehensive review will stimulate more collaborations among the research community and contribute to further developments.

关键词： Linear control systems

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Monitoring and control of the timber's drying process

Monitoring and control of the timber's drying process

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International Conference on engineering of Modern Electric Systems (EMES)

作者： Mircea Dulău Istvan Madaras Department of Electrical and Computer Engineering “Petru Maior” University Tîrgu-Mureş Romania Master at Automatic Systems of Industrial Process Control Faculty of Engineering “Petru Maior” University Tîrgu-Mureş Romania

The timber's drying process is a mandatory operation before any action of the wood processing. In the recent years, the fundamental research in the field of timber's drying has made progress, the physical laws regarding the removal of the water from the wood through different procedures (convection, vacuum, microwave etc.) being elucidated. The using of the calculus techniques allows the accurate simulation of heat and mass transfer phenomena, as well as of the mechanical aspects (internal stresses, deformations), which accompany the wood's drying process. The paper presents the implementation of the monitoring and the control system of the timber's conventional drying, using programmable controllers (Siemens), dedicated devices and dedicated software (Step 7).

关键词： Moisture Heating systems Monitoring Process control Fans Heat transfer

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Cost-benefit analysis game for efficient storage allocation in cloud-centric Internet of Things systems: A game theoretic perspective 15

Cost-benefit analysis game for efficient storage allocation ...

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15th IFIP/IEEE International Symposium on Integrated Network and Service Management, IM 2017

作者： Skourletopoulos, Georgios Mavromoustakis, Constandinos X. Mastorakis, George Sahalos, John N. Batalla, Jordi Mongay Dobre, Ciprian Department of Computer Science University of Nicosia Nicosia Cyprus Department of Informatics Engineering Technological Educational Institute of Crete Heraklion Crete Greece Department of Physics Aristotle University of Thessaloniki Thessaloniki Greece National Institute of Telecommunications and Warsaw University of Technology Szachowa Str. 1 and Nowowiejska Str. 15/19 Warsaw Poland Department of Computer Science and Engineering Faculty of Automatic Control and Computers University Politehnica of Bucharest Bucharest Romania

ISBN: (纸本)9783901882890

The advances in Internet of Everything (IoE) and the market-oriented cloud computing have provided opportunities to resolve the challenges caused by the Internet of Things (IoT) infrastructure virtualization, capacity planning, data storage or complexity. The volume and types of IoT data motivate the need for a data storage framework towards the integration of both structured and unstructured data. In this paper, we propose a novel game theoretic technique for efficient and dynamic storage allocation in cloud-centric IoT systems. The benefit maximization problem is formulated as a cost-benefit analysis game investigating the storage capacity currently used in the cloud. In view of each player's strategy to lease additional storage capacity, the game property is analyzed and we prove that the game always admits a pure strategy Nash equilibrium. Since the player's decision affects the level of benefit maximization, we elaborate on a cost-optimal storage allocation incentive mechanism, which scales effectively once non-linear or linear demand for storage capacity occurs, towards achieving optimal leasing conditions on cloud storage and computing capacity level. The experimental validation tests prove the effectiveness of the proposed game theoretic approach allocating the requests for more storage capacity in a cost-effective manner, which achieves to maximize the benefits. © 2017 IFIP.

关键词： Distributed cloud

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Strength parameters of the ABS materials used in 3D printing

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AIP Conference Proceedings 2018年第1期2029卷

作者： Agnieszka Łagoda Rafał Gabor Opole University of Technology Faculty of Mechanical Engineering Mikołajczyka 5 45-270 Opole Poland Opole University of Technology Faculty of Electrical Engineering Automatic Control and Computer Science Prószkowska 76 45-758 Opole Poland

There is need to replace the traditional materials used in mechanical constructions with cheaper materials characterized by high durability and simplicity of manufacturing. An alternative technology is 3D printing technology that uses ABS material (poly (acrylonitrile-co-butadiene-co-styrene)). 3D printing technology ensures the rapid change of model dimensions and shapes at the prototyping stage and a relatively cheap cost of new elements. There are many plastic materials producers on the market for a 3D printer. In this paper two of them have been choosen to a comparison and their mechanical parameters have been determined. The modal analysis of this material was carried out and the obtained values of resonance frequencies were compared.

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Sparse iterative learning control with application to a wafer stage: Achieving performance, resource efficiency, and task flexibility

arXiv

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arXiv 2017年

作者： Oomen, Tom Rojas, Cristian R. Eindhoven University of Technology Faculty of Mechanical Engineering Control Systems Technology Group PO Box 513 Eindhoven5600MB Netherlands Automatic Control Lab Electrical Engineering KTH - Royal Institute of Technology StockholmS-100 44 Sweden

Trial-varying disturbances are a key concern in Iterative Learning control (ILC) and may lead to inefficient and expensive implementations and severe performance deterioration. The aim of this paper is to develop a general framework for optimization-based ILC that allows for enforcing additional structure, including sparsity. The proposed method enforces sparsity in a generalized setting through convex relaxations using 1norms. The proposed ILC framework is applied to the optimization of sampling sequences for resource efficient implementation, trial-varying disturbance attenuation, and basis function selection. The framework has a large potential in control applications such as mechatronics, as is confirmed through an application on a wafer stage. Copyright © 2017, The Authors. All rights reserved.

关键词： Two term control systems

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Boundary surface of Chua's circuit in 3D state space

Boundary surface of Chua's circuit in 3D state space

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International Conference on Modern electrical and Energy Systems (MEES)

作者： Milan Guzan Patrik Kováč Irena Kováčová Matej Bereš Andrii Gladyr Faculty of Electrical Engineering and Informatics of the Technical University of Košice Slovak republic Institute of Electromechanics Energy Saving and Control Systems Mykhailo Ostrohradskyi National University Kremenchuk Ukraine

ISBN: (纸本)9781538617519

This paper deals with the visualization of chaotic attractors and boundary surfaces generated for different parameters in Chua's circuit. These objects were visualized by ParaView open-source tool. Boundary surfaces were reconstructed from the point cloud by filters which ParaView offers. The point cloud was filtered from the dozens of calculated partial 2D cross-sections of state space. The article illustrates the possibilities to use the free software with high-quality graphics output when analyzing both autonomous and non-autonomous circuits. This can help to accurately illustrate the reason for failing circuits or to clarify the principle of their operation. This software can be also used in other areas including electrical engineering and electro-mechanics.

关键词： Three-dimensional displays Surface reconstruction Surface morphology Software Data visualization Trajectory Layout

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Impedance-based method of transverse fault location in medium voltage cables

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AIP Conference Proceedings 2018年第1期2017卷

作者： Aneta Bugajska 1Faculty of Electrical Engineering Automatic Control and Computer Science Kielce University of Technology Al. 1000-lecia P.P.7 25-314 Kielce Poland

The paper presents a novel method of fault location and the calculation of transverse impedance of a fault in a damaged medium voltage cable. The method is based on the measurement of input impedance at one end of the cable with an open and short circuit state at its other end with appropriately selected frequency. The obtained results were compared with those obtained by means of the reflectometer. The effectiveness of the method was verified numerically and experimentally.

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An architecture for a cached policy-based decision making systems

An architecture for a cached policy-based decision making sy...

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International Conference on Methods and Models in Automation and Robotics (MMAR)

作者： Mariusz Pelc Tomasz Stach Dominika Swierczynska Faculty of Electrical Engineering University of Greenwich Opole Poland Faculty of Electrical Engineering Automatic Control and Informatics Opole Poland

Nowadays, majority of systems that involve some kind of decision-making process use policy-based computing where decisions are being made as a result of a policy evaluation. Policies are usually formed by system experts who describe in a specified Policy Definition Language how the system should respond to a change of its context information. However, depending on the policy complexity needed to make a decision may become an issue, especially when embedded or real-time control systems are concerned. In such systems certain level of policy complexity may result in ability of the control system to return a valid decision before a deadline. Hence any architectural solution that would resolve or at least minimise the issue would be more than welcome. In this paper we propose an architecture for a policy-based decision making system in application to an embedded control systems. In our solution add to a typical policy-based system an intermediate component - a cache memory which ultimately leads to increasing of the whole system performance. A number of scenario-based performance tests show potential performance gains.

关键词： control systems Decision making Complexity theory Cache memory Process control Computer architecture Context

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Application of System on Chip (SoC) devices for the design of a smoke detector working with megapixel image streams

Application of System on Chip (SoC) devices for the design o...

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International Conference on Methods and Models in Automation and Robotics (MMAR)

作者： Wiesław Pamuła Maciej Sajkowski Tomasz Stenzel Jarosław Michalak Grzegorz Baron Bartłomiej Szady Department of Transport Systems and Traffic Engineering Silesian University of Technology Katowice Poland Department of Power Electronics Silesian University of Technology Gliwice Poland Faculty of Automatic Control Institute of Informatics Silesian University of Technology Gliwice Poland

The paper discusses the application of System on Chip devices for processing Megapixel video streams. The domain of image processing using high resolution images is very demanding in the scope of calculating power and frequently exploits special processing hardware. The progress of integration technology brings about SoC which are capable of meeting such processing demands. Characteristics of FPGA and DSP based systems are assessed. A concise survey of chip solutions is presented and a pair of representative systems is chosen for comparison of their properties. The design of a smoke detection system is used for evaluating the advantages and drawbacks of using such SoC solutions. Almost identical image processing algorithms are implemented in the case of FPGA and DSP. Both solutions meet the image processing requirements and are suitable for real time processing. FPGA based solution is much faster as it uses pipelining for improving the utilisation of scarce memory resources.

关键词： Streaming media Digital signal processing Field programmable gate arrays Program processors Image resolution Standards

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Simulation and visualisation of a laboratory model by support software tools connection 27

Simulation and visualisation of a laboratory model by suppor...

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27th DAAAM International Symposium on Intelligent Manufacturing and Automation, DAAAM 2016

作者： Zatopek, Jiri Department of Automatic and Control Engineering Faculty of Applied Informatics Tomas Bata University in Zlin Nad Stranemi 4511 Zlin760 05 Czech Republic

ISBN: (纸本)9783902734082

This article introduces the possibilities of the simulation and visualisation of the "Twin-Rotor MIMO System" laboratory model outputs by means of various support software tools. The 3D model of the system, (used for simulation and visualisation), is designed in SolidWorks 3D CAD software. Matlab/Simulink with extension libraries like Simscape and 3D Animation - (formerly Virtual Reality Toolbox), is used for 3D visualisation and simulation. The 3D Animation toolbox is only used for the visualisation of the mathematical and real models. The Simscape library - on the other hand, is used for the validation of the reverse control of the derived mathematical models correctness and for simulation and analysis purposes as a suitable substitution for real models. As a result of this, these supporting software tools streamline the overall suggested controls - from analysis to presentation of the results.

关键词： Simulink

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