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Impact analysis of the multi-harmonic input splicing way based on the data-driven model

International Journal of Dynamics and control 2020年第4期8卷 1181-1188页

作者： Qiu, Yue Luo, Zhong Ge, Xiaobiao Zhu, Yunpeng Gao, Yi School of Mechanical Engineering and Automation Northeastern University Shenyang110819 China Key Laboratory of Vibration and Control of Aero-Propulsion System Ministry of Education Northeastern University Shenyang110819 China State Key Laboratory of Structural Analysis for Industrial Equipment Dalian University of Technology Dalian116024 China Department of Automatic Control and System Engineering University of Sheffield SheffieldS13JD United Kingdom

In response to the identification problem of nonlinear systems with harmonic input, this paper studies the identification effect of the different splicing way of the multi-harmonic input based model identification approach. In this method, the relationship between the input and output signals of the nonlinear system is represented by the Nonlinear Auto-Regressive model with exogenous inputs (NARX) model. Firstly, the modeling framework of the NARX model based on the multi-harmonic input method is introduced. Then the effect of the different splicing way contained sequence and period of splicing data on modeling results is researched and proved in theoretically. Finally, a case study is discussed to simultaneously validate that the different multi-harmonic signal splicing forms have no effect on the identification results. © 2020, Springer-Verlag GmbH Germany, part of Springer Nature.

关键词： Nonlinear systems

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Tool support for the design of self-optimizing mechatronic multi-agent systems

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International Journal on Software Tools for Technology Transfer 2008年第3期10卷 207-222页

作者： Burmester, Sven Giese, Holger Münch, Eckehard Oberschelp, Oliver Klein, Florian Scheideler, Peter Software Engineering Group Department of Computer Science University of Paderborn Paderborn Germany System Analysis and Modeling Group Hasso Plattner Institute University of Potsdam Potsdam Germany Control Engineering and Mechatronics University of Paderborn Paderborn Germany Heinz Nixdorf Institute University of Paderborn Paderborn Germany

Complex technical systems, such as mechatronic systems, can exploit networking as well as the computational power available today to achieve an automatic improvement of the technical system performance at run-time through self-optimization. To realize this vision, appropriate means for the design of such self-optimizing mechatronic systems are required. Well-established techniques and tools for the modeling of cognitive behavior, reflective behavior, and control behavior exist. However, to really enable self-optimization and its full potential, these different aspects have to be safely integrated in a manner that remains comprehensible to the designer. In this article, we present how this required integration has been realized at the semantic level by extending the unified modeling language (UML), and at the tool level by integrating the CAE tool CAMeL and the CASE tool Fujaba real-time tool suite. The presented Mechatronic UML approach supports the design of verifiable, complex, reconfigurable mechatronic systems using the multi-agent system metaphor. © Springer-Verlag 2008.

关键词： Multi agent systems

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The Study of the Voltage Frequency Effects on Partial Discharge Characteristics 9

The Study of the Voltage Frequency Effects on Partial Discha...

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9th International Conference on engineering, Applied Sciences, and Technology, ICEAST 2023

作者： Marukatat, Nattapon Mai-Eiam, Thanatorn Chaisiri, Punyavee Raxsa, Jedsada Nimsanong, Phethai Yutthagowith, Peerawut School of Engineering King Mongkut's Institute of Technology Ladkrabang Ladkrabang Bangkok10520 Thailand Power System Analysis Section Metropolitan Electricity Authority Power System Control Department Bangkok10330 Thailand

ISBN: (纸本)9798350322040

In this paper, the partial discharge (PD) characteristics under the voltage at frequencies in the range of 20 Hz to 300 Hz are studied. Three main types of PD being corona, surface and internal discharges are simulated by an arrangement of electrodes in test cells. The effects of voltage frequency on the PD characteristics in terms of PD inception voltage (PDIV), PD extinction voltage (PDEV), and phase-resolved PD (PRPD) patterns have been reported from the experimental results. It is found that in the frequency range of 20 Hz to 300 Hz there is no frequency effect on the PD characteristics (PDIV, PDEV, and PRPD) found in cases of corona and surface discharge. However, the frequency effects are found in the case of the internal discharge representing the higher frequency increase the higher PDIV and PDEV are. © 2023 IEEE.

关键词： Partial discharges

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Blockchain Based Cloud Authentication Framework for Digital Identity Management in Smart City 5

Blockchain Based Cloud Authentication Framework for Digital ...

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5th International Conference on Information Technology, Applied Mathematics and Statistics, ICITAMS 2023

作者： Varfolomeev, Alexander A. Al-Farhani, Liwa H. Rudn University Bmstu Nrnu MEPhI Information Security Department Moscow Russia Rudn University Academy Of Engineering System Analysis Control And Information Processing Dep Moscow Russia

ISBN: (纸本)9798350335118

The smart city environment includes dozens or even hundreds of various services in various areas of interest to users and aimed at improving the standard of living. These include services related to very sensitive aspects such as health, education, banking, and services that have a secret aspect. Cloud service providers need user data in order to be able to authenticate him in order to be able to access and access the desired service. Therefore, confidentiality, privacy and security are essential conditions for this type of communication. This type of complex and intrusive services leads to the need to provide effective solutions and mechanisms for authentication processes based on digital identity information. The process of building and managing trust between service providers and users needs a system of standards, so this paper provides a framework based on the archived behavior of users and cloud service providers operating within the approved trust circle in a smart environment based on the blockchain and its advantages in reliability, transparency and decentralization, while providing a mathematical model for evaluating and calculating trust standards for all subscribers as a basis for completing the authentication process and accessing services. © 2023 IEEE.

关键词： Authentication

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Optimal control of fructo-oligosaccharide production 10

Optimal control of fructo-oligosaccharide production

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10th International Conference on Simulation and Modelling in the Food and Bio-Industry, FOODSIM 2018

作者： Schorsch, J. Kinnaert, M. Fekih-Salem, R. Dewasme, L. Castro, C.C. Vande Wouwer, A. Department of Control Engineering and System Analysis Université libre de Bruxelles Belgium LAMSIN University of Tunis El Manar Tunisia Automatic Control Laboratory University of Mons Belgium Applied Chemistry and Biochemistry Department University of Mons Belgium

ISBN: (纸本)9789492859013

The objective of this study is to determine an optimal substrate feed rate for optimizing the fructo-oligosaccharide production by Aureobasidium pullulans in a fed batch reactor. The feed profile is charecterized by the feed start time, rate and end time. The optimization is carried out based on a simple dynamic model of the process and using Pontryagin maximum principle in the framework of singular control problems. The resulting control law is of the bang-bang type. The bioreactor is first filled-up at maximum feed rate, followed by a batch phase. © 2018 EUROSIS-ETI.

关键词： Substrates

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Development of a Simple Dielectric Equivalent Circuit Model from Polarization and Depolarization Current Measurements

Development of a Simple Dielectric Equivalent Circuit Model ...

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2024 IEEE IAS Industrial and Commercial Power system Asia, I and CPS Asia 2024

作者： Yutthagowith, Peerawut Nimsanong, Phethai Baba, Yoshihiro King Mongkut's Institute of Technology Ladkrabang School of Engineering Bangkok Thailand Power System Analysis Section Metropolitan Electricity Authority Department of Power System Control Bangkok Thailand Doshisha University Graduate School of Science and Engineering Kyoto Japan

ISBN: (纸本)9798350352290

Assessing insulation performance is vital for sustainable energy systems, which aim to minimize visual impact while ensuring reliability and resilience against weather-related disruptions. With increasing reliance on renewable energy sources, the importance of insulation performance becomes even more pronounced. Regular evaluations of insulation performance are critical for maintaining the safety, reliability, and resilience of electricity networks. By promptly identifying risks such as insulation degradation, utilities can improve maintenance practices, prioritize repairs, and enhance the integration of renewables, thereby boosting overall infrastructure performance. This paper introduces a straightforward and precise technique for determining the equivalent circuit parameters of insulation systems in high-voltage equipment. The proposed method facilitates the accurate determination of the dielectric loss factor from the equivalent circuit. To validate this approach, test cases were utilized to demonstrate its effectiveness. The results obtained through this method were then compared with those obtained using commercial software. The comparison reveals that the proposed approach results in a lower number of depolarization current branches compared to the commercial software. Also, it provides almost the same relative root mean square error and the lower root mean square relative error of the depolarization current. These findings underscore the appeal and effectiveness of the proposed method for determining the equivalent circuit of the dielectric model. © 2024 IEEE.

关键词： Depolarization

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systematic model identification of complex bioprocesses: Application to a CHO-K1 cell culture 9th

Systematic model identification of complex bioprocesses: App...

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9th IFAC International Symposium on Computer Applications in Biotechnology, CAB 2004

作者： Haag, Jens E. Wouwer, Alain Vande Remy, Marcel Bogaerts, Philippe Control Department Faculty of Engineering Boulevard Dolez 31 MonsB-7000 Belgium Control Engineering and System Analysis Department Université Libre de Bruxelles Avenue F. D. Roosevelt 50 CP 165/55 BrusselsB-1050 Belgium

Modeling and parameter identification are important prerequisites for state estimation and control of complex biological systems in bioengineering. Due to the great variety of cell lines and the rapidity of developments in genetics, biosystems have to be investigated in a fast and efficient way to identify the major metabolic phenomena. This paper proposes a systematic modeling procedure, which enables the description of the most important experimental settings and biological effects in terms of stoichiometry, kinetics and metabolic regulation. This procedure is successfully applied to the real case of a perfused mammalian cell culture of non-transfected CHO-K1 cells in suspension. Copyright © IFAC Computer Applications in Biotechnology, Nancy, France, 2004.

关键词： Parameter estimation

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Nanoscaled microelectronics and nanotechnology-enabled energy systems for aerospace and robotic applications 10

Nanoscaled microelectronics and nanotechnology-enabled energ...

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10th Annual TechConnect World Innovation Conference and Expo, Held Jointly with the 18th Annual Nanotech Conference and Expo, and the 2015 National SBIR/STTR Conference

作者： Lyshevski, Sergey Edward Beisenbi, Mamyrbek A. Uskenbayeva, Gulzhan Shukirova, Aliya Yermekbayeva, Janar Mukataev, Nurlan Department of Electrical and Microelectronic Engineering Rochester Institute of Technology RochesterNY14623 United States Department of System Analysis and Control L. N. Gumilyov Eurasian National University Astana Kazakhstan

ISBN: (纸本)9781498747288

For autonomous and semi- Autonomous micro air vehicles, minirobots, propulsion, remote sensing and other platforms, we study high-power and high-energy densities energy systems. these systems are designed using nanotechnology-enabled microelectronic, electronic, energy sources and energy storage components, devices and modules. research and technology developments are performed for energy harvesting, management and storage. we apply and demonstrate key modules and components, such as: (1) nanoscaled low-power microelectronics and sensors;(2) high-power-density semiconductor devices, circuit components and power electronics;(3) nanotechnology-enabled solar cells;(4) advanced energy storage devices;(5) energy management system. the proposed solutions are substantiated by performing experimental studies. the compliance of the proposed technologies to radio-controlled mini air vehicles and robots is ensured. proof-of-concept power systems are designed using specifications for all-electric autonomous aerospace, naval, robotic and security platforms. © 2015 by TechConnect. All rights reserved.

关键词： Nanotechnology

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Reconfigurable control of input affine nonlinear systems under actuator fault 9

Reconfigurable control of input affine nonlinear systems und...

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9th IFAC Symposium on Fault Detection, Supervision and Safety for Technical Processes, SAFEPROCESS 2015

作者： Tabatabaeipour, S. Mojtaba Galeazzi, Roberto System Operation Analysis Energinet.dk Tonne Kjærsvej 65 Fredericia Denmark Automation and Control Department of Electrical Engineering Technical University of Denmark Kgs. Lyngby Denmark

This paper proposes a fault tolerant control method for input-affine nonlinear systems using a nonlinear reconfiguration block (RB). The basic idea of the method is to insert the RB between the plant and the nominal controller such that fault tolerance is achieved without re-designing the nominal controller. The role of the RB is twofold: on one hand it transforms the output of the faulty system such that its behaviour is similar to that of the nominal one from the controller's viewpoint;on the other hand it modifies the control input to the faulty system such that the stability of the reconfigured loop is preserved. The RB is realized by a virtual actuator and a reference model. Using notions of incremental and input-to-state stability (ISS), it is shown that ISS of the closed-loop reconfigured system can be achieved by the separate design of the virtual actuator. The proposed method does not need any knowledge of the nominal controller and only assumes that the nominal closed-loop system is ISS. The method is demonstrated on a dynamic positioning system for an offshore supply vessel, where the virtual actuator is designed using backstepping. © 2015, IFAC (International Federation of Automatic control) Hosting by Elsevier Ltd. All rights reserved.

关键词： Fault tolerance

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Identification and quantification of hazards caused by uncontained engine rotor failure 9

Identification and quantification of hazards caused by uncon...

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2014 9th International Symposium on Safety Science and Technology, ISSST 2014

作者： Li, Mailiang Sun, Zhiqiang Gong, Erling System Analysis Institute Air Force Armament Research Academy Beijing100076 China Department of Automatic Control College of Mechatronic Engineering and Automation National University of Defense Technology Changsha410073 China

ISBN: (纸本)9781634396882

One approach based on AC20-128A is presented in order to assess the risk caused by uncontained engine rotor failure (UERF). In this approach, the risk assessment procedure includes hazard identification and hazard quantification. In the step of hazard identification, the catastrophic functional hazards, derived from the functional hazard analysis (FHA) results for the airplane, are used as the top events to construct the fault trees. The minimal cut sets (MSCs) of the fault trees are the hazards to be identified exactly. In the step of hazard quantification, the probability of one hazard triggered by some uncontained debris is evaluated. After the probabilities of all the identified hazards are quantified, the risk assessment of the airplane is completed. And the assessment result is compared with the design specifications to show compliance with the safety design. A small example is introduced to illustrate the rationality and accuracy of the aforementioned method. © 2014 The Authors. Published by Elsevier Ltd.

关键词： Risk assessment

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