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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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Nonlinear observability of grinding mill conditions

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IFAC-PapersOnLine 2016年第20期49卷 13-18页

作者： le Roux, J.D. Steinboeck, A. Kugi, A. Craig, I.K. Department of Electrical Electronic and Computer Engineering University of Pretoria Pretoria South Africa Automation and Control Institute Vienna University of Technology Gußhausstraße 27-29 Vienna1040 Austria Christian Doppler Laboratory for Model-Based Control in the Steel Industry Automation and Control Institute Vienna University of Technology Gußhausstraße 27-29 Vienna1040 Austria

A nonlinear observer model of a grinding mill is developed. The model distinguishes between the volumetric hold-up of water, solids, rocks and balls in the mill, where solids are all ore small enough to discharge through the end-discharge grate, and rocks are all ore too large to discharge. The model includes the discharge rate, abrasion rate of rocks and the abrasion rate of balls as parameters. It is shown that with mill discharge flow-rate, discharge density and volumetric hold-up measurements the model states and parameters are locally (weakly) nonlinearly observable, but not linearly observable. Although instrumentation at the mill discharge is not yet included in industrial circuits because of space restrictions, this study motivates the benefits to be gained from including instrumentation at the mill discharge. If mills are fitted with adequate measurement instrumentation at the discharge, important mill states and parameters can be estimated. © 2016

关键词： Ball mills Abrasion Comminution Flow rate Grinding (comminution) Grinding (machining) Grinding mills Observability Parameter estimation State estimation Abrasion rates Discharge density Discharge flow rates Discharge rates Industrial circuits Measurement instrumentation Non linear observer Nonlinear observability

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Data storage in the cerebellar model articulation controller (CMAC)

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Journal of Dynamic Systems, Measurement and control, Transactions of the ASME 1975年第3期97卷 228-233页

作者： Albus, J.S. Office of Developmental Automation and Control Technology Institute for Computer Sciences and Technology National Bureau of Standards Washington DC United States

The storage of manipulator control functions in the CM AC memory is accomplished by an iterative process which, if the control function is sufficiently smooth, will converge. There are several different techniques for loading the CM AC memory depending on the amount of data which has already been stored and the degree of accuracy which u desired. The CM AC system lends itself to a "natural" partitioning of the control problem into manageable subproblems. At each level the CM AC controller translates commands from the next higher level into sequences of instructions to the next lower level. Data storage, or training, is accomplished first at the lowest level and must be completed, or nearly so, at each level before it can be initiated at the next higher level. © 1975 by ASME.

关键词： Data storage systems Storage control equipment Manipulators

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Structure Selection and LPV Model Identification of a Car Steering Dynamics⁎

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IFAC-PapersOnLine 2018年第15期51卷 1086-1091页

作者： Rödönyi, Gábor Krös, Péter Pup, Dániel Soumelidis, Alexandros Szabó, Zoltán Bokor, József Systems and Control Laboratory Computer and Automation Research Institute of Hungarian Academy of Sciences Hungary Research Center of Vehicle Industry Széchenyi István University Gyr Hungary

A Linear Parameter-Varying (LPV), discrete-time black box model of an electric power assisted steering system of a passenger car is identified from open-loop step response measurement data. The goal is to provide a nominal model for control design and analysis that is able to describe the principal characteristics of the system in the whole region of steering angle and speed range of 3 to 30 km/h. Examining a set of experimental data by using classical linear time-invariant black box modeling and validation techniques, the structure of the LPV model is determined. The parameters of the model are identified based on minimizing a quadratic error criterion by nonlinear optimization algorithms. © 2018

关键词： Automobile steering equipment Electric power system control Identification (control systems) Nonlinear programming Parameter estimation Automotive control Black box model Electric power steering Linear parameter varying models Steering systems

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Dual-Tone Radio Interferometric Positioning Systems for Multi-Target Localization Using a Single Mobile Anchor

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China Communications 2015年第1期12卷 25-35页

作者： LI Li'an WANG Yiyin MA Xiaoli CHEN Cailian GUAN Xinping Department of Automation Shanghai Jiao Tong Universityand Key Laboratory of System Control and Information ProcessingMinistry of Education of China School of Electrical & Computer Engineering Georgia Institute of Technology

In this paper, a low-cost dualtone radio interferometric positioning system using a single mobile anchor is proposed to locate multiple targets at the same time. We name it mDRIPS. In mDRIPS, each target continuously transmits a dual-tone signal with its dedicated frequencies, and the mobile anchor receives the signals at different positions along its trajectory, Neither time synchronization between the mobile anchor and the targets nor time synchronization among the targets is required. We take the instability of targets clocks into consideration and develop an ESPRIT-type algorithm to estimate frequencies of each dual-tone signal. Furthermore, the time of arrival （TOA） of each target signal is extracted from the phase estimates of the received dual-tone signals. After measuring several TOAs at different locations along the anchor＇s trajectory, each target can be located. Since the frequency difference of the two tones of each dualtone signal is designed to be smaller than the channel coherence bandwidth, the same fading effect on these two tones can be eliminated. Moreover, the integer ambiguity problem due to phase wrapping is investigated, and a localization algorithm to deal with a simplified ambiguity problem is proposed. Numerical results demonstrate the efficiency of the proposed mDRIPS.

关键词： ranging localization mobile anchor radio interferometry oscillator instability

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Analysis of Influencing Factors on Carbon Monoxide Utilization Rate of Blast Furnace Based on Multi-Timescale Characteristics 36

Analysis of Influencing Factors on Carbon Monoxide Utilizati...

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第36届中国控制会议

作者： Jianqi An Yuwan Yang Min Wu Takao Terano School of Automation China University of Geosciences Hubei key Laboratory of Advanced Control and Intelligent Automation for Complex Systems Department of Computer Science School of ComputingTokyo Institute of Technology

ISBN: (纸本)9781538629185

In the blast furnace,due to the different changing frequency of different operations,and the different reaction time of gas,liquid and solid materials,there exists multi-timescale characteristics in the iron-making ***,not enough attention has been paid to this characteristic,most of the analyses on the blast furnace state before are under a fixed time ***,this paper makes a analysis of influencing factors on carbon monoxide utilization rate of blast furnace based on multi-timescale ***,the factors that affect the carbon monoxide utilization rate are analyzed from different time ***,in the short time scale,the individual influencing time scale of the permeability index,total pressure difference and top temperature is found by the support vector machine（SVM） *** in the long time scale,the influencing time scale of burdening is *** the validity of each model is verified by the field data of the blast furnace.

关键词： Multi-time scales Carbon monoxide utilization Support vector machine Blast furnace

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Discrete-event modelling and fault diagnosis of discretely controlled continuous systems

Discrete-event modelling and fault diagnosis of discretely c...

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作者： Lunze, Jan Ruhr-Universität Bochum Institute of Automation and Computer Control 44780 Bochum Germany

ISBN: (纸本)9783902661067

The papers presents five diagnostic strategies for discretely controlled continuous systems, which differ with respect to the abstraction of the model and measurement information used. From the original hybrid model, four more abstract representations are derived, which have the form of embedded maps, semi-Markov processes, timed automata or nondeterministic automata, respectively. The validity of the diagnostic result is ensured by the claim that the models should be complete and, hence, in the appropriate fault case, consistent with the input-output sequence of the discretely controlled system. In this way a hierarchy of models and of diagnostic results is obtained. Copyright © 2006 IFAC.

关键词： Hybrid systems

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Combining geometry and local appearance for object detection

Combining geometry and local appearance for object detection

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2010 20th International Conference on Pattern Recognition, ICPR 2010

作者： García-Tubío, Manuel Pascual Wildenauer, Horst Szumilas, Lech Automation and Control Institute Vienna University of Technology Austria Institute for Computer Aided Automation Vienna University of Technology Industrial Research Institute for Automation and Measurements Al. Jerozolimskie 202 02-486 Warsaw Poland

ISBN: (纸本)9780769541099

In this paper we address the problem of object detection in cluttered scenes. Local image features and their spatial configuration act as representation of object classes which are learned in a discriminative fashion. Recent contributions in the area of object detection indicate the importance of using geometrical properties for representing object classes. Prompted by this, we devised an approach tailored to control the importance of the features and their spatial alignment. We quantitatively show that modeling the spatial distribution of local features and optimising the influence of both cues significantly boosts object detection performance. © 2010 IEEE.

关键词： Object detection

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Failure detection and recovery in the batch process automation domain using automation agents

Failure detection and recovery in the batch process automati...

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2010 2nd International Conference on Advances in Computing, control and Telecommunication Technologies, ACT 2010

作者： Merdan, Munir Lepuschitz, Wilfried Šahović, Bakir Vallée, Mathieu Automation and Control Institute Vienna University of Technology Vienna Austria Institute of Computer Technology Vienna University of Technology Vienna Austria

ISBN: (纸本)9780769542690

The process industry needs to cope with permanently changing environments where sudden component failures can significantly influence the system performance if not treated in an appropriate amount of time. Agent-based manufacturing control systems are recognized as a promising technology that can handle such anomalies. However, current agent approaches are lacking real-time capabilities and solutions that support distribution and agility. We address this issue by introducing an automation agent architecture that consists of the low level control layer, which is based on IEC 61499 and responsible for directly controlling the physical component, as well as of the high level control layer which includes a world model repository and is responsible for organizational and supervisory functions. The world model serves as an accurate internal representation of the agent's external environment and is used to detect anomalies in the environment. In this paper we present the monitoring and diagnostics abilities of the introduced automation agent architecture within the batch process domain. © 2010 IEEE.

关键词： Level control

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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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