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5th IFAC symposium on Power Plants and Power systems control 2003

作者： Garduno-Ramirez, RanI Lee, Kwang Y. Electrical Research Institute Division Of Control Systems GCl Cuernavaca62490 Mexico Department Of Electrical Engineering Pennsylvania State University PA16802 United States

Fossil-fuel power plants are complex systems currently being required to take on load-following duties with full-range variations in power generation. Most of their control systems consist of decentralized PI control loop configurations supplemented with ad-hoc compensation schemes, intended to minimize the effects of interaction among the control loops caused by the non-linear coupled process dynamics. This paper analyses the viability of an inverse decoupling compensation scheme to lessen control loop interaction to ease wide-range power generation control throughout the power plant operating space. The proposed compensator introduces compensation factors among the control signals, which can be systematically determined from an equivalent process gain matrix that conveys all required information about control loop interaction. Copyright © 2003 IFAC.

关键词： Decentralized control

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Transient analysis following tripping of a primary circulating pump for 500-MWe PHWR power plant

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IEEE TRANSACTIONS ON NUCLEAR SCIENCE 2003年第2期50卷 288-293页

作者： Gaikwad, AJ Kumar, R Vhora, SF Chakraborty, G Raj, VV Bhabha Atom Res Ctr Reactor Safety Div Bombay 400085 Maharashtra India Nucl Power Corp Ltd PHT Proc Grp Bombay 400094 Maharashtra India

The 500-MWe Indian pressurized heavy water (PHWR) incorporates many new features as compared to the earlier 220-MWe PHWRs. To evaluate the new design features like primary heat transport (PHT) system configuration with two loops, four primary circulating pumps (PCPs) and four passes through core, addition of a pressurizer (surge tank) in the PHT system along with a feed/bleed system and their safety-related implications, simulation model. development and transient analyses are necessary. To mitigate the swell and shrinkage in the PHT system and to avoid high/low PHT system pressure during transients, a 30 m(3) pressurizer along with feed/bleed system is also included in the PHT pressure control system for the 500-MWe PHWR. At the same time, a reactor stepback is also actuated during the one PCP trip transient after tripping the corresponding (same side) PCP in the other loop. The corresponding PCP in the healthy loop is tripped to avoid, unsymmetrical flow and pressure distribution in the. two identical loops. A detailed transient analysis is required to study the individual contributions of various systems and provisions such as pressuriser, feed/bleed, and reactor step/set back, in mitigating the consequences of the malfunction. Mathematical models for all the major components and subsystems of the proposed 500-MWe PHWR were developed based on the conservation equations of mass, momentum, energy, and equation of state. All the associated control systems are also modeled. The PHT system includes the reactor core with nuclear fuel, PCP, PHT system pressure controller with feed/bleed system, and pressurizer (surge tank). The secondary system includes mainly the steam generators (SGs), the SG level, and pressure controllers, apart from the various steam-cycle components. All these models are integrated together to form the plant transient analysis-computer code. Several transient studies have been carried out using this code to check the various design parameters and

关键词： pressurized heavy water reactor (PHWR) process dynamics pump trip simulation thermal hydraulics

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Noisy heart sequences filtering by optimal median based operators 5

Noisy heart sequences filtering by optimal median based oper...

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5th IFAC symposium on Modelling and control in Biomedical systems 2003

作者： Lukac, Rasto Smolka, Bogdan Zavarsky, Pavol Plataniotis, Kostas N. Venetsanopoulos, Anastasios N. Slovak Image Processing Center Jarkova 343 Dobsina049 25 Slovakia Department of Automatic Control Silesian University of Technology Akademicka 16 Str. Gliwice44-101 Poland Nagaoka University of Technology 1603-1 Kamitomioka Nagaoka940-2188 Japan Edward S. Rogers Sr. Department of Electrical and Computer Engineering University of Toronto 10 King's College Road Toronto Canada

Bit errors and impulses introduced into cardiographic image sequences prohibit to process and evaluate the heart dynamics correctly. Thus, biomedical imaging such as vascular imaging and quantification of heart dynamics is closely related to digital filtering. We provide three-dimensional impulse detection based adaptive median filters designed to perform the optimal filtering situation, where the robust median filter affects only noisy samples, whereas the desired image features remains unchanged. The proposed method holds excellent preserving characteristics and takes the advantage of the superposition property despite the nonlinearity of the median filtering. Copyright © 2003 IF AC.

关键词： Median filters

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Adaptive feedforward control of processes with parameters uncertainty

Adaptive feedforward control of processes with parameters un...

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Midwest symposium on Circuits and systems (MWSCAS)

作者： A. Zaher M. Zohdy F. Areed ESE Department School of Engineering and Computer Science Oakland University Rochester MI USA

This paper investigates the design of robust controllers for such applications that could be modeled by low order dynamics with uncertainties. Lots of control applications fall into this category such as industrial processes (e.g. level, flow, pressure, etc.) and some automotive applications (e.g. active suspension). The design technique is based on using a combination of state feedback and Lyapunov-based techniques. The proposed controller has the advantage of being applicable to both linear and nonlinear models. The key issue in the design is arriving at the best parameter update law that guarantees both stability and satisfactory transient performance. Trade offs between stability and performances are carefully studied. A simulated level process and one degree of freedom robot arm are used to exemplify the suggested technique. Finally a conclusion is submitted with comments regarding real-time compatibility of the proposed controller.

关键词： Programmable control Adaptive control process control Uncertain systems Stability Robust control Vehicle dynamics Uncertainty Pressure control Industrial control

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Parametric identifiability of a structured kinetic model for mammalian cell cultures 5

Parametric identifiability of a structured kinetic model for...

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5th IFAC symposium on Modelling and control in Biomedical systems 2003

作者： Sidoli, Fabio R. Mantalaris, Athanasios Asprey, Steven P. Centrefor Process Systems Engineering Imperial College LondonSW7 2AZ United Kingdom Department of Chemical Engineering Imperial College LondonSW7 2AZ United Kingdom Orbis Investment Advisory Ltd Orbts House 5 Mansfield Street W1G9NG United Kingdom

Model parametric identifiability poses the question - "based on the mathematical behaviour of the model itself and assuming noise-free data - can all of the model parameters, in principle, be uniquely identified? " A class of parametric models, such as kinetic models, are used to capture the complex dynamics of cellular processes. However, increased model fidelity is often accompanied by an enlargement of the model parameter set and the expensive and time-consuming nature of mammalian cell culture experiments makes model parameter identifiability especially valuable as the development of unidentifiable models can be halted prior to experimental validation stages, in rum saving time and valuable resources. In this work, parameter identifiability analysis was performed on a state-of-the-art cell culture model described by a large differential algebraic equation system containing 200 equations and over 300 parameters. However, both the size and properties of this very large model has meant that a "practical identifiability" or estimability method had to be applied. Copyright ©2003 IF AC.

关键词： Kinetic parameters

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System-level analysis of fault effects in an automotive environment

System-level analysis of fault effects in an automotive envi...

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IEEE International symposium on Defect and Fault Tolerance in VLSI systems

作者： F. Corno S. Tosato P. Gabrielli Dip. Automatica e Informatica Politecnico di Turino Torino Italy Fiat Auto-Product and Process Engineering-Integrated Chassis Control Torino Italy

ISBN: (纸本)0769520421

In recent years, new requirements in terms of vehicle performance has increased significantly the amount of on-board electronics, thus raising more concern about safety and fault tolerance induced by the electronic system in automotive products. The adoption of several on board active systems and their interactions forced designers to substitute point to point connections with networking systems, mainly based on the controller area network (CAN) protocol. This paper presents some recent results to improve the evaluation of reliability due to network connections. Evaluation is based on first modeling the network at the functional level and then integrating it into a complete vehicle model describing both electronic and mechanical behavior; in this way, it is possible to build an automated fault injection environment to forecast the effects of faults at the network level on the vehicle dynamics. We evaluated this approach on the vehicle dynamic control subsystem, and analyzed the effects on vehicle performance in the presence of several network faults.

关键词： Automotive engineering Vehicle safety Predictive models Vehicles Vehicle dynamics Product safety Fault tolerant systems Force control control systems Protocols

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Chaotic and random point processes: analysis, design and application to hybrid systems

Chaotic and random point processes: analysis, design and app...

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IEEE International symposium on Circuits and systems (ISCAS)

作者： A.L. Baranovski W. Schwarz S. Banerjee M. Di Bernardo C.K. Tse G. Mazzini J.L. Rodriguez Marrero G. Setti O. Woywode Insrirute for Fundumenlals of Electrical Engineering and Electronics Dresden University of Technology Germmy Indian Institute of Technology Kharagpur Universita degli Studi del Sannio Italy Hong Kong Polytechnic University Hong Kong Universidad Pontificia Comillas Madrid Spain University of Ferrara Italy University of Technology Dresden

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VALSE- validation of safety-related driver assistance systems

VALSE- validation of safety-related driver assistance system...

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IEEE symposium on Intelligent Vehicle

作者： K. Athanasas C. Bonnet H. Fritz C. Scheidler G. Volk DaimlerChrysler AG Research and Technology Berlin Germany

Advanced driver assistance systems (ADAS) support the driver in his driving task. Such systems include the warning of the driver in critical situations as well as the support of the driver in the longitudinal and lateral control of the vehicle. Established assistance systems like anti-lock braking or electronic stability management depend only on the driving dynamics of the vehicle itself In contrast to that, an ADAS in addition has to detect the driving behavior of other vehicles by sensing the environment, e.g. via radar, lidar, and video technology. Typical ADAS examples are emergency braking systems, adaptive cruise control or lane keeping systems. The additional complexity of ADAS makes the validation process a far more difficult and hazardous task. Test drives with experimental cars can be considered state-of-the-art ADAS validation technique. The aim of the VALSE project is to set-up a validation platform enabling ADAS testing in a safe and cost-efficient laboratory environment. The presented validation platform VALSE uses a standard hardware-in-the-loop system which is extended by a proprietary software for microscopic real time simulation of a truck platoon.

关键词： Driver circuits Vehicle driving control systems Testing Stability Disaster management Environmental management Technology management Vehicle dynamics Radar detection

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Artificial evolution of pulsed neural networks on the motion pattern classification system

Artificial evolution of pulsed neural networks on the motion...

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IEEE International symposium on Computational Intelligence in Robotics and Automation (CIRA)

作者： Y. Katada K. Ohkura K. Ueda Faculty of Engineering Kobe University Japan RACE (Research into Artifacts Center for Engineering) University of Tokyo Japan

Categorization is one of the most important cognitive abilities for autonomous agents. In natural systems, animals discriminate any object not only by its figure but also by its motion pattern. In this work, we applied the standard GA to evolve pulsed neural controllers for the motion pattern classification system in order to investigate how evolved agents perform the discrimination task, its evolutionary dynamics and the process of self-organization in the neural controllers. The results demonstrate that the agent controlled by the evolved neural networks can discriminate between the objects with the different motion. In the process of evolution, the fitness is improved by the modulation in the connection weights among neurons.

关键词： Artificial neural networks Pattern classification Motion control Neural networks control systems Robot kinematics Autonomous agents Animals Neurons Humans

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A motion estimation system

A motion estimation system

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IEEE International symposium on Industrial Electronics (ISIE)

作者： J. Kolodko L. Vlacic Intelligent Control Systems Laboratory (ICSL) School of Microelectronic Engineering Griffith University Nathan Australia

The ability to navigate intelligently among dynamic obstacles is critical for autonomous vehicles though the majority of navigation and sensing systems are not explicitly designed for dynamic environments. In our work we consider the design of sensing system that is able to extract useful motion information using a combination of range and visual data. The generated information is analogous to the information generated by the short-range process of biological visual systems. In this paper we give an outline of our motion estimation algorithm, present preliminary simulation results and describe a hardware implementation of this algorithm.

关键词： Motion estimation Navigation Vehicle dynamics Intelligent vehicles Remotely operated vehicles Mobile robots Data mining Visual system Biological system modeling Hardware

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