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2009 10th European control Conference, ECC 2009

作者： Szederkenyi, Gabor Process Control Research Group Systems and Control Laboratory Computer and Automation Research Institute Budapest Hungary

ISBN: (纸本)9783952417393

In this paper, the identifiability of a pressurizer model is investigated. The modeled physical system is located in the primary circuit of a pressurized water nuclear power plant. A simple first principle model for the pressurizer is used for the calculations and it is shown that both the appropriately transformed and the original physical model parameters are structurally identifiable. © 2009 EUCA.

关键词： Nuclear power plants

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A Risk-Averse Just-In-Time Scheme for Learning-Based Operation of Microgrids With Coupled Electricity-Hydrogen-Ammonia Under Uncertainties

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IEEE Transactions on Sustainable Energy 2025年

作者： Li, Longyan Ning, Chao Pan, Guangsheng Zhang, Leiqi Gu, Wei Zhao, Liang Du, Wenli Shahidehpour, Mohammad Shanghai Jiao Tong University Department of Automation Shanghai200240 China Ministry of Education of China Key Laboratory of System Control and Information Processing Shanghai200240 China School of Electrical Engineering Southeast University Nanjing210096 China Zhejiang Key Laboratory of Distributed Generations and Microgrid Technology State Grid Zhejiang Electric Power Research Institute Hangzhou310014 China Key Laboratory of Smart Manufacturing in Energy Chemical Process Ministry of Education East China University of Science and Technology China Department of Electrical and Computer Engineering Illinois Institute of Technology ChicagoIL60616 United States

This paper proposes a Risk-Averse Just-In-Time (RAJIT) operation scheme for Ammonia-Hydrogen-based Micro-Grids (AHMGs) to boost electricity-hydrogen-ammonia coupling under uncertainties. First, an off-grid AHMG model is developed, featuring a novel multi-mode ammonia synthesis process and a hydrogen-ammonia dual gas turbine with tunable feed-in ratios. Subsequently, a state-behavior mapping strategy linking hydrogen storage levels with the operation modes of ammonia synthesis is established to prevent cost-ineffective shutdowns. The proposed model substantially improves operational flexibility but results in a challenging nonlinear fractional program. Based upon this model, a data-driven RAJIT scheme is developed for the real-time rolling optimization of AHMGs. Unlike conventional one-size-fits-all schemes using one optimization method throughout, the data-driven RAJIT intelligently switches between cost-effective deterministic optimization and risk-averse online-learning distributionally robust optimization depending on actual risk profiles, thus capitalizing on the respective strengths of these two optimization methods. To facilitate the solution of the resulting nonlinear program, we develop an equivalent-reformulation-based solution methodology by leveraging a constraint-tightening technique. Numerical simulations demonstrate that the proposed scheme guarantees safety and yields an overall cost reduction up to 14.6% compared with several state-of-the-art methods. © 2025 IEEE.

关键词： Ammonia

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Reducing the Modeling Error by Observer Based PID Regulators for a Class of Factorable Nonlinear Plants

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IFAC-PapersOnLine 2015年第11 11期48卷 662-667页

作者： Keviczky, L. Bányász, Cs. Institute of Computer Science and Automation MTA-BME Control Engineering Research Group Hungarian Academy of Sciences H-1111 Budapest Kende u 13-17 Hungary

A PID regulator tuning method is introduced for HAMMERSTEIN and WIENER type block-oriented cascade factorable nonlinear models. Then the YOULA-parameterization approach is discussed which allows to develop an observer... 详细信息

关键词： Proportional control systems Parameterization Hammerstein model Nonlinear process observer PID regulators YOULA regulator

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Analysis of Look-ahead control on Traffic Flow

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IFAC-PapersOnLine 2016年第3期49卷 261-266页

作者： Németh, Balázs Gáspár, Péter Mihály, András Bokor, József Institute for Computer Science and Control Hungarian Academy of Sciences Budapest Hungary Institute for Computer Science and Control Hungarian Academy of Sciences and MTA-BME Control Engineering Research Group Budapest Hungary

The paper analyzes the relationship between the traffic flow and the look-ahead control. The purpose of the analysis is to map the impact of the unique speed profiles used by the look-ahead controlled vehicles on the traffic flow consisting of conventional vehicles. The analysis is carried out by considering different traffic volumes, penetration rates of the look-ahead vehicles and the energy-scaling parameter of the look-ahead optimization algorithm. The analysis is evaluated both in the Matlab simulation environment and in the microscopic traffic simulation environment VISSIM using COM interface. © 2016

关键词： Street traffic control MATLAB Numerical control systems Vehicles Energy scaling Look ahead control Matlab simulations Microscopic traffic simulation Optimization algorithms Penetration rates Speed profile Traffic volumes

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Multi-Objective Load Distribution Optimization for Hot Strip Mills

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Journal of Iron and Steel research International 2013年第2期20卷 27-32,61页

作者： JIA Shu-jin LI Wei-gang LIU Xiang-hua DU Bin Department of Automation and Key Laboratory of System Control and Information Processing Shanghai Jiao Tong University Automation Division of Research Institute Baosteel Group Corporation College of Information Science and Engineering Northeastern University Research Institute of Science and Technology Northeastern University

Load distribution is a key technology in hot strip rolling process, which directly influences strip product quality. A multi-objective load distribution model, which takes into account the rolling force margin balance, roll wear ratio and strip shape control, is presented. To avoid the selection of weight coefficients encountered in single objective optimization, a multi-objective differential evolutionary algorithm, called MaximinDE, is proposed to solve this model. The experimental results based on practical production data indicate that MaximinDE can obtain a good pareto-optimal solution set, which consists of a series of alternative solutions to load distribution. Decision-makers can select a trade-off solution from the pareto-optimal solution set based on their experience or the importance of ob- iectives. In comparison with the empirical load distribution solution, the trade-off solution can achieve a better per- formance, which demonstrates the effectiveness of the multi-objective load distribution optimization. Moreover, the conflicting relationship among different objectives can be also found, which is another advantage of multi-objective load distribution optimization.

关键词： hot strip mill load distribution multi-objective optimization

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Independent wheel steering control design based on variable-geometry suspension

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IFAC-PapersOnLine 2016年第11期49卷 426-431页

作者： Németh, Balázs Fényes, Dániel Gáspár, Péter Systems and Control Laboratory Institute for Computer Science and Control Hungarian Academy of Sciences Budapest Hungary Institute for Computer Science and Control Hungarian Academy of Sciences MTA-BME Control Engineering Research Group Budapest Hungary

The paper presents the control design of an independent wheel steering system for in-wheel electric vehicles. The steering of the wheels is based on the variable-geometry suspension control, which influences the camber angle and the scrub radius of the wheel. A nonlinear formulation of the variable-geometry suspension is derived, which is validated through a high-fidelity suspension model. Furthermore, the impact of the independent steering in the lateral model of the vehicle is incorporated. In the paper the robust control design of the independent steering system in a hierarchical structure is presented. The trajectory tracking of the vehicle is guaranteed by the robust H∞control, while the intervention of the variable-geometry suspension is designed based on the Linear Quadratic theorem. © 2016

关键词： Suspensions (components) Automobile steering equipment Automobile suspensions Electric machine control Electric vehicles Geometry Magnetic levitation vehicles Robust control Steering Vehicle wheels Hierarchical structures In wheel Independent wheel Nonlinear formulation Robust control designs Suspension control Trajectory tracking Variable geometry

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Robust Leader-Following Output Regulation of Uncertain Multi-Agent Systems With Time-Varying Delay

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IEEE/CAA Journal of Automatica Sinica 2018年第4期5卷 807-817页

作者： Ala Shariati Qing Zhao Automation&Control Research Group Faculty of Electrical and Computer EngineeringKhajeh Nasir Toosi University of TechnologyTehran ***Iran Department of Electrical and Computer Engineering at University of Alberta EdmontonAlberta T6R1Z6Canada

In this paper, the robust analysis and design of leader-following output regulation for multi-agent systems described by general linear models is given in presence of timevarying delay and model uncertainty. To this aim, a new regulation protocol for the closed-loop multi-agent system under a directed graph is proposed. An important specification of the proposed protocol is to guarantee the leader-following output regulation for uncertain multi-agent systems with both stable and unstable agents. Since many signals can be approximated by a combination of the stationary and ramp signals, the presented results work for adequate variety of the leaders. The analysis and design conditions are presented in terms of certain matrix inequalities. The method proposed can be used for both stationary and ramp leaders. Simulation results are presented to show the effectiveness of the proposed method.

关键词： Linear matrix inequality(LMI) multi-agent systems robust leader-following output regulation time-varying delay

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Optimality of a two-degree of freedom control system

Optimality of a two-degree of freedom control system

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7th IASTED International Conference on control and Applications, CA 2005

作者： Keviczky, L. Bányász, Cs. Computer and Automation Research Institute Control Engineering Research Group Hungarian Academy of Sciences Kendeu 13-17 H-1111 Budapest Hungary

ISBN: (纸本)0889865027

Limits of optimality in a generic two-degree of freedom control system is investigated. New relationships are introduced for the decomposition to identification and optimization errors in inverse stable and inverse unstable processes. In the inverse stable case these errors has a random, in the inverse unstable case systematic and random parts.

关键词： control system analysis

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Three-dimensional path planning for unmanned aerial vehicle based on interfered fluid dynamical system

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Chinese Journal of Aeronautics 2015年第1期28卷 229-239页

作者： Wang Honglun Lyu Wentao Yao Peng Liang Xiao Liu Chang Science and Technology on Aircraft Control Laboratory Beihang University School of Automation Science and Electrical Engineering Beihang University The 28th Research Institute of China Electronics Technology Group Corporation School of Automation Shengyang Aerospace University

This paper proposes a method for planning the three-dimensional path for low-flying unmanned aerial vehicle（UAV） in complex terrain based on interfered fluid dynamical system（IFDS） and the theory of obstacle avoidance by the flowing stream. With no requirement of solutions to fluid equations under complex boundary conditions, the proposed method is suitable for situations with complex terrain and different shapes of obstacles. Firstly, by transforming the mountains, radar and anti-aircraft fire in complex terrain into cylindrical, conical, spherical, parallelepiped obstacles and their combinations, the 3D low-flying path planning problem is turned into solving streamlines for obstacle avoidance by fluid flow. Secondly, on the basis of a unified mathematical expression of typical obstacle shapes including sphere, cylinder, cone and parallelepiped, the modulation matrix for interfered fluid dynamical system is constructed and 3D streamlines around a single obstacle are obtained. Solutions to streamlines with multiple obstacles are then derived using weighted average of the velocity field. Thirdly, extra control force method and virtual obstacle method are proposed to deal with the stagnation point and the case of obstacles＇ overlapping respectively. Finally, taking path length and flight height as sub-goals, genetic algorithm（GA） is used to obtain optimal 3D path under the maneuverability constraints of the UAV. Simulation results show that the environmental modeling is simple and the path is smooth and suitable for UAV. Theoretical proof is also presented to show that the proposed method has no effect on the characteristics of fluid avoiding obstacles.

关键词： obstacles terrain dynamical avoidance unmanned constraints overlapping unified flying spherical

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Linear output selection for feedback linearization 15th

Linear output selection for feedback linearization

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15th World Congress of the International Federation of Automatic control, 2002

作者： Szederkényi, G. Hangos, K.M. Bokor, J. Vámos, T. Systems and Control Laboratory Computer and Automation Research Institute P.O. Box 63 BudapestH-1518 Hungary Al Research Group Computer and Automation Research Institute Hungary

ISBN: (纸本)9783902661746

The problem of selecting a linear scalar output y = Kx for a single-input nonlinear dynamic system given in input-affine form (x = f(x) + g(x)u) is considered in this paper. In the general case, when the zero dynamics is hard to investigate analytically, K is suggested to be the resulting feedback gain of an LQ linear optimal control problem for the linearized model. The advantageous properties of the LQ design (gain and phase margins, etc.) known for linear systems enable to obtain an at least locally asymptotically stable, yet simple nonlinear controller if the linear output y = Kx is used for feedback linearization. With this output selection, the relative degree of the open loop system can be easily set to 1 at the desired operating point and it possesses locally (or globally) asymptotically stable zero dynamics. It is shown on examples that the resulting closed loop nonlinear system can be stable in a wide neighborhood of the operating point. The concepts are illustrated on two characteristic nonlinear systems of two different application domain: an inverted pendulum and a continuous fermenter. Copyright © 2002 IFAC.

关键词： Feedback linearization

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