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2013 4th Argentine Symposium and Conference on Embedded systems, SASE/CASE 2013

作者： Lisboa, Leandro P. Lasevich, Henrique Neto, Nelso R.B. Salton, Aurelio T. Flores, Jeferson V. Group of Automation and Control Systems Pontifical University of Rio Grande Do sul Porto Alegre RS Brazil

ISBN: (纸本)9781479910984

This paper focuses on the development of a time optimal control method for two-dimensional rigid body systems. Our approach is based on the traditional Proximate Time-Optimal Servomechanism (PTOS), which starts with a near-time-optimal controller and then switches to a linear controller at the time when the system output is close to a given target. This paper proposes to expand the PTOS, a unidirectional control law to a two-dimensional system, in order to perform linear point-to-point trajectories. © 2013 IEEE.

关键词： Nonlinear feedback

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A Robust PID Autotuning Method for Steam/Water Loop in Large Scale Ships

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IFAC-PapersOnLine 2018年第4期51卷 462-467页

作者： Zhao, Shiquan Ionescu, Clara M. De Keyser, Robin Liu, Sheng Ghent University Faculty of Engineering and Architecture Research group on Dynamical Systems Control Technologiepark 914 ZwijnaardeB9052 Belgium Harbin Engineering University College of Automation China

During the voyage of the ship, disturbances from the sea dynamics are frequently changing, and the ship's operation mode is also varied. Hence, it is necessary to have a good controller for steam/water loop, as the control task is becoming more challenging in large scale ships. In this paper, a robust proportional-integral-derivative (PID) autotuning method is presented and applied to the steam/water loop based on single sine tests for every sub-loop in the steam/water loop. The controller is obtained during which the user-defined robustness margins are guaranteed. Its performance is compared against other PID autotuners, and results indicate its superiority. © 2018

关键词： Proportional control systems Robustness (control systems) Ships Steam Steam power plants Two term control systems Autotuner Modulus margins Multi output Multiinput Steam/water

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HTTP Filtering Device Model on Industrial-Type Hardware Platform

HTTP Filtering Device Model on Industrial-Type Hardware Plat...

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2019 International Russian automation Conference, RusAutoCon 2019

作者： Budnikov, Konstantin Nestyulya, Roman Kurochkin, Alexander Laboratory of Integrated Informational Control Systems Institute of Automation and Electrometry SB RAS Novosibirsk Russia Group of Magistral-modular systems Institute of Automation and Electrometry SB RAS Novosibirsk Russia

ISBN: (纸本)9781728102658

The presence of a large number of informational Internet resources, access to which needs to be restricted for a number of reasons, requires the improvement of means and methods for ensuring a selective ban on access to information on the network. This problem occurs at the upper levels of industrial automated control systems built on the Purdue / ISA-95 model. Filtering requests to a resource by its URL is the most popular solution that can be considered as the most balanced in terms of its strengths and weaknesses. The paper considers the model of the HTTP filtering device on the Gridex-I hardware platform of the industrial type, which can be used for operating conditions with increased requirements. The results of its bench tests with standard and improved filtering algorithms are presented. © 2019 IEEE.

关键词： HTTP

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Emission optimized hybrid vehicle operation with thermal exhaust model

Emission optimized hybrid vehicle operation with thermal exh...

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14th International Stuttgart Symposium on Automotive and Engine Technology, 2014

作者： Kunkel, Florian Isermann, Rolf Technische Universtität Darmstadt Institute for Automatic Control and Mechatronics Research Group Control Systems and Process Automation Germany

ISBN: (纸本)9783658051297

Hybrid electric vehicles offer the possibility of driving electrically with the combustion engine shut off. However, this leads to cooling of the catalyst, which may significantly worsen the vehicle emissions. In this contribution, first a vehicle model including thermal models of the exhaust gas aftertreatment is introduced. Based on a reference battery state of charge trajectory for the predicted trip, a fuel optimal online optimization by means of Pontryagin’s Minimum Principle is introduced. It is then extended by further optimization criteria, including the catalyst temperature. Simulations of the New European Driving Cycle show that purely fuel optimal operation leads to a catalyst temperature which is too low for effectively reducing the emissions. The optimization which includes the catalyst temperature is able to keep the catalyst in an operating state with only small effects on the overall fuel consumption. © Springer Fachmedien Wiesbaden 2014.

关键词： Hybrid vehicles

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Robust LQ Optimal control for Wind Turbine Power Tracking Operation 63

Robust LQ Optimal Control for Wind Turbine Power Tracking Op...

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63rd IEEE Conference on Decision and control, CDC 2024

作者： Grapentin, Aaron Hans, Christian A. Raisch, Jorg University of Kassel Automation and Sensorics in Networked Systems Group Germany Technische Universität Control Systems Group Berlin Germany Science of Intelligence Research Cluster of Excellence Berlin Germany

ISBN: (纸本)9798350316339

In this paper, a robust linear quadratic optimal control approach for accurate active power tracking of wind turbines is presented. For control synthesis, linear matrix inequalities are employed using an augmented wind turbine state model with uncertain parameters. The optimization problem for controller synthesis is derived from standard linear quadratic optimal control but extended to multiple operating points. The resulting controller ensures robust stability in different operating regions. In a case study, the novel approach is compared to existing controllers from literature. Simulations indicate that the controller improves power tracking accuracy while leading to similar mechanical wear as existing approaches. © 2024 IEEE.

关键词： Wind turbines

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The state of VLSI testing

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IEEE Potentials 2002年第3期21卷 12-16页

作者： Patnaik, L.M. Jamadagni, H.S. Agrawal, V.K. Varaprasad, B.K.S.V.L. Indian Institute of Science Bangalore India Department of Computer Science and Automation Bangalore India Indian Institute of Science Bangalore India Control Systems Group ISRO Satellite Centre India

No abstract available

关键词： Very large scale integration Circuit testing Circuit faults Clocks Logic Power supplies Circuit noise Crosstalk Propagation delay Digital circuits

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Safe Risk-Averse Bayesian Optimization for controller Tuning

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IEEE Robotics and automation Letters 2023年第12期8卷 8208-8215页

作者： Konig, Christopher Ozols, Miks Makarova, Anastasia Balta, Efe C. Krause, Andreas Rupenyan, Alisa Inspire Ag Control and Automation Group Zurich8005 Switzerland Eth Zurich Automatic Control Laboratory Zurich8092 Switzerland Eth Zurich Learning & Adaptive Systems Group Zurich8092 Switzerland Zhaw Zurich University of Applied Sciences Zhaw Centre for Artificial Intelligence Winterthur8400 Switzerland

controller tuning and parameter optimization are crucial in system design to improve both the controller and underlying system performance. Bayesian optimization (BO) has been established as an efficient model-free method for controller tuning and adaptation. Standard methods, however, are not enough for high-precision systems to be robust with respect to unknown input-dependent noise and stable under safety constraints. In this work, we present a novel data-driven approach, RAGoOSe, for safe controller tuning in the presence of heteroscedastic noise, combining safe learning with risk-averse Bayesian optimization. We demonstrate the method for synthetic benchmark and compare its performance to established BO-based tuning methods. We further evaluate RaGoose performance on a real precision-motion system utilized in semiconductor industry applications and compare it to the built-in auto-tuning routine. © 2016 IEEE.

关键词： Benchmarking

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Optimization model for expansion planning of distribution systems

Optimization model for expansion planning of distribution sy...

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IEEE/PES Transmission and Distribution Conference - Latin America

作者： Haffner, S Pereira, LA Pereira, LFA Lemos, FAB de Lima, AL Brixius, CA Giron, LR GSEE Electrical Energy Systems Group of PUCRS Pontifical Catholic University of Rio Grande do Sul Brazil GACS Automation and Systems Control Group of PUCRS Pontifical Catholic University of Rio Grande do Sul Brazil

ISBN: (纸本)0780387759

This paper presents an optimization model for the problem of expansion planning of distribution electrical energy system: more specifically, for defining the route of feeders. The distribution system is represented by a graph in which the nodes represent demands and sources of energy;the branches represent the possible paths for supply. The model can be used to consider the insertion, removal and/or substitution of power lines of different gauge, with the objective of minimizing network installation and maintenance costs, subject to the limits to capacity of power lines and energy substations, and the maximum and minimum voltage limits specified by the problem. The validity and efficiency of the proposed model are demonstrated by means of two examples of medium-voltage distribution systems.

关键词： power distribution power distribution lines power distribution planning power distribution economics

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Event-Based Fractional Order MIMO control for Hemodynamic Stabilization during General Anesthesia

Event-Based Fractional Order MIMO Control for Hemodynamic St...

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2023 IEEE International Conference on systems, Man, and Cybernetics, SMC 2023

作者： Birs, Isabela Muresan, Cristina Ghita, Mihaela Ghita, Maria Nascu, Ioana Ionescu, Clara Technical University of Cluj-Napoca Automation Department Romania Ghent University DySC Research Group on Dynamical Systems and Control Belgium

ISBN: (纸本)9798350337020

General anesthesia is used to induce a reversible loss of consciousness in a patient to ensure they are completely unaware and pain-free during a surgical procedure. This is achieved through the administration of a combination of drugs that depress the central nervous system and can include intravenous injections, inhaled gases, or a combination of both. During the anesthesia maintenance phase, the events in surgery are not continuous, but obey a profile similar to that endorsed by event-based control. The present study considers event-based control as a natural solution to the control challenge of general anesthesia. Two fractional order Proportional Integral (PI) controllers are tuned and implemented using a decentralized approach to control a part of general anesthesia based on hemodynamic variables. The results show that this approach can be successfully used to keep Cardiac Output and Mean Arterial Pressure stable, with a special focus on patient safety, through fast detection of surgical stimulus and robustness to inter/intra patient variability. © 2023 IEEE.

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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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