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arXiv 2020年

作者： Sui, Tianju Mo, Yilin Marelli, Damián Sun, Ximing Fu, Minyue School of Control Science and Engineering Dalian University of Technology Dalian China Department of Automation Tsinghua University Beijing China School of Automation Guangdong University of Technology Guangzhou China French Argentine International Center for Information and Systems Sciences National Scientific and Technical Research Council Argentina School of Electrical Engineering and Computer Science University of Newcastle CallaghanNSW2308 Australia School of Automation Guandong University of Technology China

In this paper, we study the impact of stealthy attacks on the Cyber-Physical System (CPS) modeled as a stochastic linear system. An attack is characterised by a malicious injection into the system through input, output or both, and it is called stealthy (resp. strictly stealthy) if it produces bounded changes (resp. no changes) in the detection residue. Correspondingly, a CPS is called vulnerable (resp. strictly vulnerable) if it can be destabilized by a stealthy attack (resp. strictly stealthy attack). We provide necessary and sufficient conditions for the vulnerability and strictly vulnerability. For the invulnerable case, we also provide a performance bound for the difference between healthy and attacked system. Numerical examples are provided to illustrate the theoretical results. Copyright © 2020, The Authors. All rights reserved.

关键词： Embedded systems

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Detection and evaluation of events in EEG dynamics in post-surgery patients with physiological-based mathematical models

Detection and evaluation of events in EEG dynamics in post-s...

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IEEE International Conference on systems, Man and Cybernetics

作者： Eva Dulf Maria Ghita Clara M. Ionescu Department of Automation Technical University of Cluj-Napoca Cluj Napoca Romania Dynamical Systems and Control research group Ghent University Ghent Belgium

As part of the new directions for vision and mission of Europe, patient well-being and healthcare become core features of a modern and prosperous society. That is, healthcare costs are optimized towards patient benefit and sideways effects such as cost-related reduction in medication, in frequency of post-operatory interventions, in recovery times and in comorbidity risk. In this paper, we address the incidence of events related to stroke, epileptic seizures and tools to possibly predict their presence from Electroencephalography (EEG) signal acquired in post-surgery patients. Wavelet analysis and spectrogram indicate graphically changes in the energy content of the EEG signal. Physiologically based neuronal dynamic pathway is used to derive fractional order impedance models. Nonlinear least squares identification technique is used to identify model parameters, with results suggesting parameter redundancy. There is a significant difference in model parameter values between EEG signal with/-out events.

关键词： Aneurysm Europe Electroencephalography Time-frequency analysis Blood Spectrogram Sociology

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Robust Fractional Order PI control for Cardiac Output Stabilisation

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IFAC-PapersOnLine 2019年第1期52卷 994-999页

作者： Isabela Birs Dana Copot Cristina I. Muresan Robin De Keyser Clara M. Ionescu DySC research group on Dynamical Systems and Control Ghent University Ghent Belgium Tech Lane Science Park 125 Department of Automation Technical University of Cluj-Napoca Cluj-Napoca Romania

Drug regulatory paradigms are dependent on the hemodynamic system as it serves to distribute and clear the drug in/from the body. While focusing on the objective of the drug paradigm at hand, it is important to maintain stable hemodynamic variables. In this work, a biomedical application requiring robust control properties has been used to illustrate the potential of an autotuning method, referred to as the fractional order robust autotuner. The method is an extension of a previously presented autotuning principle and produces controllers which are robust to system gain variations. The feature of automatic tuning of controller parameters can be of great use for data-driven adaptation during intra-patient variability conditions. Fractional order PI/PD controllers are generalizations of the well-known PI/PD controllers that exhibit an extra parameter usually used to enhance the robustness of the closed loop system.

关键词： cardiac output anesthesia intra-patient variability fractional order controllers autotuning method robustness iso-damping stability

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Intensive Testing of Infrastructure-to-Vehicle Visible Light Communications in Real Outdoor Scenario: Evaluation of a 50 meters link in Direct Sun Exposure

Intensive Testing of Infrastructure-to-Vehicle Visible Light...

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2019 Global LIFI Congress, GLC 2019

作者： Avǎtǎmǎniţei, Sebastian-Andrei Cǎilean, Alin-Mihai Zadobrischi, Eduard Done, Adrian Dimian, Mihai Popa, Valentin Department of Computers Electronics and Automation Stefan cel Mare University of Suceava Suceava Romania Integrated Center for research Development and innovation in Advanced Materials Nanotechnologies and Distributed Systems for Fabrication and Control Stefan cel Mare University of Suceava Suceava Romania Technical University of Cluj-Napoca Cluj-Napoca Romania

ISBN: (纸本)9781728150222

Due to numerous advantages, Visible Light Communications are considered to have high potential in providing support for communication-based vehicle safety applications. In this area, Infrastructure-to-Vehicle communications are one of the main use cases. Nevertheless, the outdoor communication channel is very problematic affecting the reliability of VLC systems. In this paper we perform an intensive day test for such a VLC link. The purpose is to experimentally determine the influence of the sun power and of sun orientation on VLC, emphasizing and analyzing the effect of the sunlight on the link performances. Another aim of this experimental investigation is to identify potential vulnerabilities in order to provide support for future developments. For this set-up we used a standard complying LED traffic light as a VLC emitter and an enhanced design of photodiode-based VLC receiver using a novel logarithmic transimpedance configuration. The experimental results showed that the sun can have a major influence on outdoor VLC. Nevertheless, they also showed that with a proper system design and with adequate signal conditioning, VLC can support 50 meters communication ranges in automotive applications. © 2019 IEEE.

关键词： Visible light communication

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Benchmark Challenge: a robust fractional order control autotuner for the Refrigeration systems based on Vapor Compression

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IFAC-PapersOnLine 2018年第4期51卷 31-36页

作者： Muresan C.I. Keyser R.D. Birs I. Copot D. Ionescu C. Department of Automation Technical University of Cluj-Napoca Cluj-Napoca Romania DySC research group on Dynamical Systems and Control Ghent University Ghent Belgium

This paper proposes fractional order autotuner controller for the benchmark refrigeration system. The method is an extension of a previously presented autotuning principle and produces a robust fractional order PI controller to gain variations. Fractional order PI controllers are generalizations of the integer order PI controllers, which have a supplementary parameter that is usually used to enhance the robustness of the closed loop system. The method is not restricted to robustness to gain variations and can be adapted to obtain robust fractional order controllers to time delay or time constant variations, for example. The autotuning method presented in this paper has several advantages such as the need for a single sine test to be applied to the process to extract the necessary information and the elimination of complex nonlinear equations in the tuning procedure for fractional order controllers. The results obtained on the benchmark system indicate the method has high potential for real-life applications. © 2018

关键词： autotuning method benchmark challenge fractional order controllers robustness

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Patching the firewall software to improve the availability and security: Markov models for internet of things based smart business center 14

Patching the firewall software to improve the availability a...

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14th International Conference on ICT in Education, Research and Industrial Applications. Integration, Harmonization and Knowledge Transfer. Volume II: Workshops, ICTERI 2018

作者： Kolisnyk, Maryna Piskachova, Iryna Kharchenko, Vyacheslav Department of Automation and Control in Technical Systems National Technical University KPI Kharkiv Ukraine Department of Computer Science and Control Systems Ukrainian State University of the Railway Transport Kharkiv Ukraine Department of Computer Systems Networks and Cyber Security National Aerospace University KhAI Kharkiv Ukraine

The paper considers the tasks and solutions for availability assessing and securing the Internet of Things (IoT), in particular, the Smart Business Center (SBC) with wired communication networks. The goal of this paper is to develop and research of SBC availability models, taking into account the changes in power consumption modes in operating systems, denial-of-services (DDoS) attacks, patching for firewalls depending on the presence of software vulnerabilities, considering reliability of system components such as a server and a router. Comparison of several models of the IoT system availability has been made and recommendations have been formulated regarding the policy of patching. © 2011 Springer-Verlag Berlin Heidelberg.

关键词： Availability

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Analytical modeling and preliminary fractional order velocity control of a small scale submersible

Analytical modeling and preliminary fractional order velocit...

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2018 SICE International Symposium on control systems, SICE ISCS 2018

作者： Birs, Isabela Muresan, Cristina Prodan, Ovidiu Folea, Silviu Ionescu, Clara Automation Department Technical University of Cluj-Napoca Romania Civil Engineering Department Technical University of Cluj-Napoca Romania Dynamical Systems and Control Group Ghent University Belgium

ISBN: (纸本)9784907764586

This paper presents the modeling and control of a small scale submersible equipped with one propeller. The modeling process takes into consideration physical elements such as fluid statics, viscous damping and propulsive thrust. A first order transfer function with time delay is developed to make the connection between the voltage applied to the motor actuating the propeller and the velocity of the submersible. The velocity control is realized with a Fractional Order Proportional Integral (FOPI) controller that ensures zero steady state error. The controller is designed based on frequency domain specifications such as gain crossover frequency, phase margin and robustness to gain variations. The obtained fractional controller is validated through simulation in terms of steady state error and disturbance rejection performance. © 2018 The Society of Instrument and control Engineers - SICE.

关键词： Velocity control

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Approximation Methods for FO-IMC controllers for Time Delay systems

Approximation Methods for FO-IMC Controllers for Time Delay ...

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作者： Cristina I.Muresan Isabela R.Birs Ovidiu Prodan Ioan Nascu Robin De Keyser Department of Automation Technical University of Cluj-Napoca DySC research group on Dynamical Systems and Control Ghent University EDT group Flanders Make consortium Department of Civil Engineering Technical University of Cluj-Napoca

Fractional Order Internal Model control(FO-IMC) is among the newest trends in extending fractional calculus to the integer order control. Approximation of the FO-IMC is one of the key problems. Apart from this, when dealing with time delay systems, the time delay needs also to be approximated. All these approximations can alter the closed loop performance of the controller. In this paper, FO-IMC controllers will be tested in terms of the approximation accuracy. The case study is a first order system with time delay. Several scenarios will be considered, aiming for a conclusion regarding the choice of the approximation method as a function of the process characteristics, closed loop performance and FO-IMC fractional order. To approximate the time delay, two extensively used techniques will be considered, such as the series and Pade approximations. These will be compared to a novel approximation technique. An analysis of the test cases presented show that the series approximation proves more suitable in a single scenario, whereas the novel approximation method produces better results for the rest of the test cases.

关键词： Approximation Methods for FO-IMC controllers for Time Delay systems IMC

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Critical technologies in the cluster of virtual and augmented reality

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IOP Conference Series: Materials Science and Engineering 2021年第1期1019卷

作者： V Zhmud A Liapidevskiy V Avrmachuk V Sayapin J N Sedinkin W Hardt Department of Automation Novosibirsk State Technical University Novosibirsk Russia General Director of Novosibirsk Institute of Program Systems Novosibirsk Russia Department of Complex Information Security of Computer Systems Tomsk State University of Control Systems and Radioelectronics Tomsk Russia Director of R&D Center of Novosibirsk Institute of Program Systems Novosibirsk Russia Vice-Director on Development of Novosibirsk Institute of Program Systems Novosibirsk Russia Department of Computer Science Technical University of Chemnitz Chemnitz Germany

The program 'Digital Economy of the Russian Federation', launched in 2019, contains virtual and augmented reality technologies in its list. Each such technology consists of many assistive technologies called sub-technologies. These assistive technologies make up a large list, while failure to obtain the required results in at least one of these technologies may lead to the fact that the integral technology will not be created. This article discusses a list of only critical assistive technologies, that is, precisely those technologies whose creation is a critical factor for creating a generalized (integral) technology. It is on these technologies that the main emphasis should be placed not only in financing their development, but also in the thorough planning of goals and objectives, in the selection of performers and in the acceptance of research results.

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Use of thermoelectrical phenomena for hard-alloy cutting plates control in the cutting zone

Use of thermoelectrical phenomena for hard-alloy cutting pla...

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2018 International Russian automation Conference, RusAutoCon 2018

作者： Krylov, Evgeny Kukhtik, Mikhail Kozlovtseva, Nadezhda Department of Production Process Automation Volgograd State Technical University Volgograd Russia Department of Automated Information Processing and Control Systems Stankin Moscow State Technical University Moscow Russia

ISBN: (纸本)9781538649381

The article presents the results of studies that allowed us to establish that in order to ensure stable operation of the multiple insert tools on CNC machines in a given time interval, it is necessary to control the cutting properties of replaceable multi-sided carbide inserts. The paper suggests a method for determining the cutting properties of the carbide multiple insert tools and the physical and mechanical properties of the material using of the thermal EMF value generated by a natural thermocouple, composed of the tool material and the material to be processed. The physical validation of the thermal EMF signal analog-to-digital conversion use for the state of carbide inserts evaluation in the set of built-up tool is given. Fast-flowing contact processes in the intermittent cutting conditions are analyzed. A relationship between the thermal EMF value of the trial run and the energy coefficient in the permissible cutting speed formula is established. Experimental research on intelligent production machine showed the effectiveness of the suggested method. © 2018 IEEE.

关键词： Analog to digital conversion

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