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35th FISITA World Automotive Congress, 2014

作者： Gáspár, Péter Bokor, József Szabó, Zoltán Fülep, Tímea Szauter, Ferenc András, Mihály Systems and Control Laboratory Institute for Computer Science and Control Budapest Hungary Systems and Control Laboratory MTA SZTAKI MTA-BME Control Engineering Research Group Budapest Hungary Research Center of Vehicle Industry Széchenyi István University Győr Hungary Department of Control for Transportation and Vehicle Systems Budapest University of Technology and Economics Budapest Hungary

The paper proposes a multi-layer supervisory architecture for integrated control systems in road vehicles. The role of the supervisor is to coordinate active control components and provide priority among them. The supervisor has information about the current operational mode of the vehicle and it is able to make decisions about the necessary interventions into the vehicle components and guarantee the reconfigurable operation of the vehicle. The decisions of the supervisor are propagated to the lower layers through predefined interfaces encoded as suitable scheduling signals. The contribution of the paper is the application of the LPV methodology in a design case study in which an integrated control of four wheel independently-actuated electric vehicle with active steering system is developed. © 2014, FISITA. All rights reserved.

关键词： Robust control

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Robust and Fault-Tolerant control of In-Wheel Vehicles with Cornering Resistance Minimization

Robust and Fault-Tolerant Control of In-Wheel Vehicles with ...

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European control Conference

作者： András Mihály Péter Gáspár Institute for Computer Science and Control Hungarian Academy of Sciences and MTA- BME Control Engineering Research Group Hungary Institute for Computer Science and Control Hungarian Academy of Sciences and MTA-BME Control Engineering Research Group Hungary

ISBN: (纸本)9781509025923

The paper proposes a robust fault-tolerant trajectory and velocity tracking control for a four-wheel independently-actuated (4WIA) vehicle operated by in-wheel electric motors and a steer-by-wire steering system. The vehicle is basically operated with in-wheel motors using torque vectoring during cornering, thus steering is only applied when the vehicle is skidding, an electric motor has failed or the cornering maneuver is more efficiently realizable with applying a given amount of steering angle. A reconfigurable method is applied, which is capable of reallocating the actuator inputs in order to minimize cornering resistance and the consequent power loss of the in-wheel motors. In case of skidding or in-wheel motor failure, the energy optimal control allocation is substituted for by a fault-tolerant actuator intervention. The high-level reconfiguration control of the 4WIA is based on the LPV (Linear Parameter Varying) method, while the cornering resistance minimization and wheel torque allocation are based on constrained optimization techniques. The operation of the energy optimal and fault-tolerant control is demonstrated in the CarSim simulation environment.

关键词： Robust Fault-Tolerant control In-Wheel Vehicles

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Short-term Cooling,Heating and Electrical Load Forecasting in Business Parks Based on Improved Entropy Method 36

Short-term Cooling,Heating and Electrical Load Forecasting i...

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第36届中国控制会议

作者： Ling Cheng Yu Zhang Li Suo Si Shen Fang Fang Lu Jin China Electrical Power Research Institute State Grid Shanghai Municipal Electric Power Company Electric Power Research Institute NARI Group Corporation/State Grid Electric Power Research Institute The School of Control and Computer Engineering North China Electric Power University

ISBN: (纸本)9781538629185

Short-term cooling,heating and electrical load forecasting in business parks is the basis of safe and economical operation of the scheduling system,and its accuracy is largely influenced by the selection of similar *** order to improve the accuracy of load forecasting,a short-term load forecasting method based on improved entropy method is *** method is used in the similar day selection and the similar day weight determination *** overcomes the drawback of traditional entropy weight method that the information transferred by entropy weight and entropy value is inconsistent when all entropy values are close to *** verification example shows that this method can not only select the most suitable similar day from the historical day,but also has a faster computing speed than the conventional intelligent algorithm.

关键词： short-term cooling heating and electrical load forecasting improved entropy method similar days

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research on Influencing Factors of Power Grid Security Risk Based on "cognitive-Constraint" Model 2

Research on Influencing Factors of Power Grid Security Risk ...

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2nd International Conference on Artificial Intelligence and Cloud Computing, ICAICC 2020

作者： Yu, Lei Lv, Jin Peng, Qiwei Zhao, Linying Li, Gang Nari Group Corporation State Grid Electric Power Research Institute Nanjing Jiangsu China North China Electric Power University School of Control and Computer Engineering Baoding Hebei China

With the improvement of the intelligent level of the power grid, the operation safety of the power system has received extensive attention. The current accident analysis mostly relies on the experience of personnel, which is prone to omissions. Firstly, this article analyzes the safety risk factors of power grid accidents from four aspects: man factors, equipment factors, management factors, and environmental factors based on the accident causes theory. Secondly, the fault tree model is used to explore the mechanism of each failure factor and quantify the structural importance of each event. Finally, summarize the rules of accidents and make reasonable suggestions for scientifically and reasonably avoiding similar accidents and building a safe power grid. © 2021 Published under licence by IOP Publishing Ltd.

关键词： Electric power transmission networks

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Review on interaction between electromagnetic field and biological tissues

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Sensors and Transducers 2012年第8期143卷 60-70页

作者： Zakaria, Zulkarnay Abdul Rahim, Ruzairi Lee, Pick Yern Mansor, Muhammad Saiful Badri Abdullah, Azian Azamimi Yaacob, Sazali Mohd. Muji, Siti Zarina Biomedical Electronic Engineering Department School of Mechatronic Engineering Universiti Malaysia Perlis 02600 Arau Perlis Malaysia Process Tomography Research Group Control and Instrumentation Engineering Department Faculty of Electrical Engineering Universiti Teknologi Malaysia 81310 Skudai Johor Bahru Malaysia Department of Computer Engineering Faculty of Electrical and Electronic Engineering Universiti Tun Hussein Onn Malaysia 86400 Parit Raja Batu Pahat Johor Malaysia

The objective of this paper is to have a look on the interaction of electromagnetic field (EM) on biological tissue from the view of physiological and electrical engineering. The understanding of the phenomena in the interaction may give clear picture on the fundamental concept of dielectric dispersion in term of suitable frequency application and the reaction of biological tissue to it. The other factors such as thermal effect also will be gone through. This review may provide some useful information to the research of magnetic induction tomography on the biological tissue imaging and electromagnetic therapy which apply electromagnetic field at certain frequency in their application. © 2012 IFSA.

关键词： Electromagnetic fields

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Analysing trade-offs in scan power and test data compression for systems-on-a-chip

Analysing trade-offs in scan power and test data compression...

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作者： Rosinger, P.M. Gonciari, P.T. Ai-Hashimi, B.M. Nicolici, N. Electronic Systems Design Group Department of Electronics and Computer Science University of Southampton Southampton SO17 1BJ United Kingdom Computer-Aided Design and Test Research Group Department of Electrical and Computer Engineering McMaster University 1280 Main St. W. Hamilton Ont. L8S 4K1 Canada

The relationship is investigated between test data compression and power dissipation during scan testing. It is shown how combining a proposed symmetric coding scheme and a weighted scan latch reordering (W-SLR) algorithm allows efficient exploration of the scan power and test data compression solution space. This is achieved by reducing and balancing the transition activity in the scan-in and scan-out sequences. This will impact the test data compression, which depends only on the scan-in sequence, and the overall scan power dissipation, which depends on the scan-in and scan-out sequences. Trade-off analysis using ISCAS89 benchmark circuits shows that, by employing the proposed symmetric coding scheme and varying a weighting parameter in the W-SLR algorithm, the embedded core designer can easily and explicitly control the scan power and volume of test data. The proposed asymmetric/symmetric code transformation is equally applicable to (and thus it maintains its benefits) any asymmetric 'run length' coding scheme.

关键词： Data compression

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Stochastic Cramér-Rao bound for direction estimation in unknown noise fields

Stochastic Cramér-Rao bound for direction estimation in unk...

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作者： Gershman, A.B. Stoica, P. Pesavento, M. Larsson, E.G. McMaster University Communications Research Laboratory Department of Electrical and Computer Engineering Hamilton Ont. Canada McMaster University Signal Theory Group Ruhr University Department of Electrical and Computer Engineering Bochum Germany Uppsala University Department of Systems and Control Uppsala Sweden

The stochastic Cramér-Rao bound (CRB) plays an important role in array processing because several advanced high-resolution direction-of-arrival (DOA) estimation methods are known to achieve this bound asymptotically. In the paper, the stochastic CRB on the DOA estimation accuracy is studied in the general case of an arbitrary unknown noise field parameterised by a vector of unknowns. Explicit closed-form expressions for the CRB are derived and its properties are examined theoretically and by practically relevant numerical examples.

关键词： Signal processing

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Gain-scheduling state-feedback control for LPV systems with multiple parameters

Gain-scheduling state-feedback control for LPV systems with ...

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作者： Park, Bum Yong Park, Poogyeon Yun, Sung Wook Electrical and Computer Engineering Division Pohang University of Science and Technology Pohang Gyungbuk 790-784 Korea Republic of Instrumentation and Control Research Group Posco Korea Republic of

ISBN: (纸本)9788995605646

This paper introduces linear parameter varying (LPV) model with multiple parameters in the parts affected by the state and the input (LPV-MP) and the state-feedback LPV controller to stabilize the nonlinear system by using the proposed model. Based on LPV-MP, we first formulate the stabilization conditions in terms of parameterized linear matrix inequalities (PLMIs) and design the state-feedback LPV controller using multiple parameters-dependent Lyapunov function (MPDLF). Then, PLMI conditions are converted into LMI conditions by using multiple parameter relaxation technique. The proposed method results in the reduced number of vertices of the polytope and thus results in the decreased computational burden compared with the conventional studies. © 2011 Asian control Association.

关键词： State feedback

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Distributed MPC for frequency regulation in multi-terminal HVDC grids 19

Distributed MPC for frequency regulation in multi-terminal H...

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19th IFAC World Congress on International Federation of Automatic control, IFAC 2014

作者： McNamara, Paul Meere, Ronan O'Donnell, Terence McLoone, Seán Dynamics and Control Research Group Dept. Electronic Engineering NUI Maynooth Maynooth Kildare Ireland Electricity Research Centre Engineering and Materials Science Centre University College Dublin Belfield-Dublin 4 Ireland Energy Power and Intelligent Control Research Cluster School of Electronics Electrical Engineering and Computer Science Queen's University Belfast Belfast United Kingdom

ISBN: (纸本)9783902823625

High Voltage Direct Current (HVDC) lines allow large quantities of power to be transferred between two points in an electrical power system. A Multi-Terminal HVDC (MTDC) grid consists of a meshed network of HVDC lines, and this allows energy reserves to be shared between a number of AC areas in an efficient manner. Secondary Frequency control (SFC) algorithms return the frequencies in areas connected by AC or DC lines to their original setpoints after Primary Frequency controllers have been called following a contingency. Where multiple TSOs are responsible for different parts of a MTDC grid it may not be possible to implement SFC from a centralised location. Thus, in this paper a simple gain based distributed Model Predictive control strategy is proposed for Secondary Frequency control of MTDC grids which allows TSOs to cooperatively perform SFC without the need for centralised coordination. © IFAC.

关键词： Distributed MPC Multi-terminal HVDC Secondary Frequency control

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Sensor parametrisation and blending: A group theoretic approach 9

Sensor parametrisation and blending: A group theoretic appro...

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

作者： Szabó, Z. Balas, G. Gáspár, P. Bokor, J. Institute for Computer Science and Control Hungarian Academy of Sciences Kende u. 13-17 Budapest Hungary Department of Aerospace Engineering and Mechanics University of Minnesota 107 Akerman Hall 110 Union St SE MinneapolisMN55455 United States Institute for Computer Science and Control Hungarian Academy of Sciences MTA-BME Control Engineering Research Group Hungary

Sensors play an important role in the control loop. Often they are considered to be a part of the plant and the interaction between the plant and sensor is disregarded. In this paper we investigate stability properties of the control loop when this interface is considered explicitly from an input/output perspective. Making the assumption that the sensor is stable, we provide a Youla type characterisation of all the sensors that renders the loop stable for a fixed plant and controller. When none of the sensors can provide the necessary performance it is time for sensor blending or a sensor reconfiguration. The simplest form of sensor fusion, i.e., a linear combination of the sensors, does not preserve stability of the control loop, in general. In order to design efficient algorithms that operate on the set of controllers or a set of sensors that fulfil a given property, e.g., stability or a norm bound, it is important to have an operation that preserves that property, i.e., a suitable blending method. This paper places the sensor blending problem in a more general context: an operation on stable sensors is given under which feedback stability is preserved and under which sensors form a group, the sensor group. Under the action of this group operation changes in different sensitivities can be also expressed in explicit terms. These results can be applied in the analysis and synthesis of schemes with sensor reconfiguration. © 2015, IF AG (International Federation of Automatic control) Hosting by Elsevier Ltd. All rights reserved.

关键词： Blending

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