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Analysis of Look-ahead control on Traffic Flow

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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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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An SNR-Adaptive Relaying Algorithm for Multi-Antenna Cooperative Networks

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China Communications 2017年第10期14卷 228-236页

作者： Shuangshuang Han Peng Zhang Feijin Shi Fei-Yue Wang The State Key Laboratory of Management and Control for Complex Systems Institute of Automation Chinese Academy of SciencesBeijing China Qingdao Academy of Intelligent Industries Qingdao Shandong Province China The School of Computer Engineering Weifang University Shandong P. R. China Communications Headquarters Ministry of Foreign Affairs of the People's Republic of China Beijing China Research Center of Computational Experiments and Parallel Systems The National University of Defense Technology Changsha China

Multiple-input multiple-output(MIMO) and cooperative communications have been attracted great attention for the improvements of communication capacity, power consumption, and transmission coverage. The conventional fixed relaying protocols, amplify-and-forward(AF) and decode-and-forward(DF), have their own advantages and disadvantages, i.e. AF performs better than DF for low signal-to-noise ratio(SNR) region, while the reverse is true for high SNR region. Therefore, this paper proposes an SNR-adaptive forward(SAF) relaying scheme obtaining the advantages of both AF and DF. Furthermore, the proposed SAF does not need to switch between AF and DF when SNR changes. The main idea is to adaptively derive the soft information at the cooperative relay nodes based on the information of the received signal and the SNR. Besides, based on the theoretical analysis and the simulation results, it is affirmed that the proposed SAF achieves superior performance than both AF and DF for all SNRs. Moreover, the performance gain would be improved with the increasing number of parallel cooperative relay nodes.

关键词： MIMO SNR SNR-adaptive forward multi-antenna

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Bird's Eye View on Systems and control - General View and Case Studies

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IFAC-PapersOnLine 2016年第6期49卷 274-279页

作者： Vámos, T. Bars, R. Sik, D. Institute of Computer Science and Control Hungarian Academy of Sciences MTA-SZTAKI Budapest Hungary Dept. of Automation and Applied Informatics Budapest University of Technology and Economics MTA-BME Control Engineering Research Group Budapest Hungary

Systems and control are all around us. System view, understanding systems and how they are controlled is important for everyone. The behavior of systems is determined by some fundamental principles which can be understood by everyone. The main principles governing systems and control are presented on different levels. The first level is dedicated for everyone. Comics-like interpretation is provided with explanations. The second level discusses the main topics dedicated for the interested students. Several case studies demonstrate how system view is considered in different areas of life. With this approach systems in different areas of life could be better understood contributing to better decisions influencing their performance. The third level provides deeper insight into some aspects of modern mathematical system theory, to geometric view of control systems. The material is available on a website on the internet. © 2016

关键词： control theory Algorithms Case studies control disciplines control education control structure Systems and control

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Two short proofs regarding the logarithmic least squares optimality in Chen, K., Kou, G., Tarn, J. M., Song, Y. (2015): Bridging the gap between missing and inconsistent values in eliciting preference from pairwise comparison matrices, Annals of Operations research 235(1):155–175

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Annals of Operations research 2017年第1期253卷 707-708页

作者： Sándor Bozóki Laboratory on Engineering and Management Intelligence Research Group of Operations Research and Decision Systems Institute for Computer Science and Control Hungarian Academy of Sciences Budapest Hungary Department of Operations Research and Actuarial Sciences Corvinus University of Budapest Budapest Hungary

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Feedback stabilization: a group theoretic approach

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IFAC-PapersOnLine 2016年第9期49卷 146-151页

作者： Bokor, J. Szabó, Z. Institute for Computer Science and Control Hungarian Academy of Sciences Kende u. 13-17 Budapest Hungary Institute for Computer Science and Control Hungarian Academy of Sciences MTA-BME Control Engineering Research Group Hungary

In order to design efficient algorithms that work on the set of controllers that fulfill a given property, e.g., stability, it is important to have an operation that preserves that property i.e., a suitable blending method. In this paper we show that one can define a special blending that preserves stability and it is defined directly in terms of the plant and controller, without the necessity to use any factorization. Moreover, as an interesting side effect of these investigations, an operation is given that leaves invariant the strongly stabilizing controllers and defines a group structure on them, too. The properties of the newly defined operation are illustrated through the special case of static state feedback controllers. Besides its educative value the presentation also provides a possible tool for the algorithmic development. © 2015

关键词： group theory Blending controllers Nonlinear control systems Plants (botany) State feedback Feedback stabilization group structure Parametrisation Side effect Stabilizing controllers Static state feedback

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control design of an electro-hydraulic actuator for variable-geometry suspension systems

Control design of an electro-hydraulic actuator for variable...

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Mediterranean Conference on control and automation (MED)

作者： Balázs Németh Dániel Fényes Péter Gáspár József Bokor Systems and Control Laboratory 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

ISBN: (纸本)9781509045341

This paper proposes the modeling and control design of an electro-hydraulic actuator for the variable-geometry suspension system. The purpose of this novel suspension type is to guarantee trajectory tracking through the variation of the camber angle. The motion of the wheel is realized by the electro-hydraulic actuator, whose elements are the cylinder and the electric valve. Thus, the trajectory tracking of the vehicle requires the positioning of the cylinder. First, the modeling of the system is presented using hydraulic and mechanical equations. Since the dynamics of the actuator contains several nonlinearities, a control-oriented linear model is formed. Second, the positioning problem of the cylinder is solved by using the control Lyapunov Function technique, which is able to handle the discrete control input. Moreover, the control strategy requires pressure signals in the cylinder, which are estimated using a robust H ∞ observer. The efficiency of the proposed algorithm is demonstrated through simulation examples.

关键词： Suspensions Actuators Mathematical model Wheels Valves Lyapunov methods Pistons

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Bidirectional controlled quantum teleportation using eight-qubit quantum channel in noisy environments

arXiv

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arXiv 2018年

作者： Sarvaghad-Moghaddam, Moein Ramezani, Zeinab Amiri, Is Quantum Design Automation Lab Amirkabir University of Technology Tehran Iran Department of Electrical and Computer Engineering Northeastern University BostonMA02115 United States Computational Optics Research Group Advanced Institute of Materials Science Ton Duc Thang University Ho Chi Minh City Viet Nam Faculty of Applied Sciences Ton Duc Thang University Ho Chi Minh City Viet Nam

In this work, a novel protocol is proposed for bidirectional controlled quantum teleportation (BCQT) in which a quantum channel is used with the eight-qubit entangled state. Using the protocol, two users can teleport an arbitrary entangled state and a pure two-qubit state (QBS) to each other simultaneously under the permission of a third party in the role of controller. This protocol is based on the controlled-not operation, appropriate single-qubit (SIQ) UOs and SIQ measurements in the .. and ..-basis. Reduction of the predictability of the controllerfs qubit (QB) by the eavesdropper and also, an increasing degree of freedom of controller for controlling one of the users or both are other features of this protocol. Then, the proposed protocol is investigated in two typical noisy channels include the amplitude-damping noise (ADN) and the phase-damping noise (PDN). And finally, analysis of the protocol shows that it only depends on the amplitude of the initial state and the decoherence noisy rate (DR). Copyright © 2018, The Authors. All rights reserved.

关键词： Degrees of freedom (mechanics)

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Implementation of a robust cruise control using look-ahead method

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IFAC-PapersOnLine 2016年第11期49卷 505-510页

作者： Gáspár, Péter Németh, Balázs Basset, Michel Orjuela, Rodolfo Institute for Computer Science and Control Hungarian Academy of Sciences MTA-BME Control Engineering Research Group Budapest Hungary Systems and Control Laboratory Institute for Computer Science and Control Hungarian Academy of Sciences Budapest Hungary Laboratory Université de Haute-Alsace Mulhouse Cedex France

The paper proposes the implementation of a robust cruise control system which is able to ensure the fuel-efficient travel of the vehicle with a look-ahead control algorithm. The H∞-based feedforward-feedback control method guarantees robustness against varying vehicle mass, longitudinal disturbances and the consideration of actuator dynamics. The advantage of the method is the application of a small number of vehicle parameters. Therefore, a method for various passenger cars without significant modifications is needed. The proposed cruise control and the look-ahead method are implemented in a software-in-the-loop (SIL) environment using DSpace Autobox, which cooperates with the high-fidelity CarSim software through CAN communication. © 2016

关键词： Cruise control Application programs computer control Numerical control systems Robust control Vehicles CAN communications Feedforward feedback control Look ahead control Look ahead methods Number of vehicles Robust control designs Software in the loop(SIL) Software in the loops

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Adaptive droop control with self-adjusted virtual impedance for three-phase inverter under unbalanced conditions 50

Adaptive droop control with self-adjusted virtual impedance ...

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50th IEEE International Symposium on Circuits and Systems, ISCAS 2017

作者： Lu, Zelun Li, Wenxuan Li, Zhen Chen, Xi Lu, Herbert H. C. Dong, Ning Liu, Xiangdong School of Automation Key Laboratory for Intelligent Control and Decision on Complex Systems Beijing Institute of Technology BeijingI0008I China Global Energy Interconnection Research Institute North America Santa Clara 5451 Great America Parkway CA95054 United States School of Electrical Electrical and Computer Engineering University of Western Australia CrawleyWA6009 Australia

ISBN: (纸本)9781467368520

Three-phase inverter is a very important interface in microgrid. Droop control and virtual impedance are widely used to improve the power sharing capability and stability of such system, which however becomes ineffective under unbalanced conditions and may even cause potential stability problems. This paper proposes a fully self-adjusted virtual impedance design to guarantee the decoupling of active and reactive power. The arbitrary unbalanced information is acquired through the pseudo-inverse impedance matrix modeled by full-dq technique. Based on the unbalanced impedance identified, the adaptive droop control is achieved for not only accurate power sharing but also reliable voltage support with autonomous unbalanced voltage compensation. Simulations results verify the accurate identification of unbalanced impedance and effectiveness of the proposed method on the unbalanced compensation. © 2017 IEEE.

关键词： Electric inverters

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