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International Symposium on Applied Computational Intelligence and Informatics ( SACI)

作者： M. Osaci A.D. Berdie G. Prostean A.A. Pop Faculty of Engineering HunedoaraJDepartment of Electrical Engineering and Computer Industry Politehnica University of Timisoara Hunedoara Romania Faculty of Management in Production and Transportation/Department of Management Politehnica University of Timisoara Timisoara Romania Faculty of Automation and Computer Science Politehnica University of Timisoara Timisoara Romania

This paper analyzes, by case study, the similarities and differences between two existing componentization techniques of a project in Web Dynpro ABAP: the faceless componentization and assistance class componentization, made possible due to the MVC architecture (Model-View-Controller), which are the basis of the Web Dynpro ABAP framework. We highlighted the similarities and differences, advantages and disadvantages.

关键词： Transportation Portals Context Debugging Maintenance engineering Reliability Discrete wavelet transforms

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Resource Isolation Policy for task scheduling strategy in open real-time systems

Resource Isolation Policy for task scheduling strategy in op...

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31st Chinese Control Conference, CCC 2012

作者： Yan, Liu Xiao Liang, Zhong Jing, Zhang Dong, Fu Xiao Yunnan Computer Technology Application Key Lab Faculty of Information Engineering and Automation Kunming University of Science and Technology Kunming 650500 China

ISBN: (纸本)9789881563811

Propose a Resource Isolation Policy(RIP) which is applied to open real-time systems with shared resources. It can combine with static scheduling strategy such as Stack Resource Policy(SRP) and dynamic scheduling strategy like Bandwidth Inheritance(BWI) conveniently. It can solve the problem that hard real-time task's deadline cannot be guaranteed by Bandwidth Inheritance. We are going to prove that RIP would not interfere with the schedulability of a scheduling strategy with which RIP is combined, and to present the influence of scheduling performance of soft real-time task when using RIP, by theoretical analysis in detail. At last, we introduce how to combine the RIP with the BWI through a new strategy instance called BWI-RIP. © 2012 Chinese Assoc of Automati.

关键词： Real time systems

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A motion control method of four-wheel drive omni-directional mobile robots based on multi points preview control

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Journal of Theoretical and Applied Information Technology 2012年第1期45卷 278-284页

作者： Chen, Jianping Wang, Jianbin Yang, Yimin Xiao, Qijun Faculty of Computer Zhaoqing University Zhaoqing 526061 Guangdong China Faculty of Automation Guangdong University of Technology Guangzhou 510090 Guangdong China Faculty of Electronic Information and Mechnical and Electrical Engineering Zhaoqing University Zhaoqing 526061 Guangdong China

Aiming at the problem that the traditional control methods can't satisfactorily complete the trajectory tracking task, so a multi point preview control method based on automobile driving is designed for the motion control of four-wheel drive omni-directional mobile robot. Lateral position error and curvature of each preview point are calculated based on the robot's lateral position error model. Meanwhile, by considering the current position error and preview point's position error, a fuzzy controller is designed. The fuzzy controller adjusts the lateral velocity and longitudinal velocity according to the preview information of the different path conditions, so as to realize the expected trajectory tracking. Experiment results show that the tracking errors of different paths are obviously reduced, and the tracking precision is greatly improved, which means the preview control method presented in this paper is effective. It can realize fast track even when the tracking path varies a lot. © 2005 - 2012 JATIT & LLS. All rights reserved.

关键词： Fuzzy control

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Physiological signals to individual assessment for application in wireless health systems

Physiological signals to individual assessment for applicati...

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9th International Multi-Conference on Systems, Signals and Devices, SSD 2012

作者： Kumar, Mohit Stoll, Norbert Thurow, Kerstin Stoll, Regina Center for Life Science Automation F.-Barnewitz-Str. 8 D-18119 Rostock Germany Institute of Automation College of Computer Science and Electrical Engineering University of Rostock Richard-Wagner-Str. 31 D-18119 Rostock Germany Institute of Preventive Medicine Faculty of Medicine University of Rostock St.-Georg-Str. 108 D-18055 Rostock Germany

ISBN: (纸本)9781467315906

The mathematical analysis of physiological signals is meant for extracting the signal features relevant for functional state assessment. The stochastic fuzzy modeling and analysis techniques have much to offer in this area. The approach takes simultaneously the advantages of Bayesian analysis theory and fuzzy theory to formulate the patients' state prediction problem mathematically in a sensible way. It is possible to design new signal feature extraction methods with high diagnostic efficiency and thus is possible to build an expert system for making accurate predictions regarding the physiological state of individuals. © 2012 IEEE.

关键词： Expert systems

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Principles of the active collision mitigation system for vehicles involved in light impact 13

Principles of the active collision mitigation system for veh...

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13th Mini Conference on Vehicle System Dynamics, Identification and Anomalies, VSDIA 2012

作者： Mihály, András Gáspár, Péter Szabó, Zoltán Sename, Oliver Dugard, Luc Department of Control and Transport Automation Faculty of Transportation Engineering and Vehicle Engineering Budapest University of Technology and Economics Bertalan L. U. 2. Budapest Hungary Computer and Automation Research Institute Systems and Control Laboratory Kende U. 13-17 Budapest Hungary Control Systems Department GIPSA-Lab 11 Rue des Mathématiques ENSE3 BP 46 St martin d'Hrescedex GrenobleF-38402 France

ISBN: (纸本)9789633131022

The paper presents a collision mitigation method in which the aim is to stabilize the motion of the vehicle after a light impact has occurred. A yaw rate servo control based on the bicycle model is applied for control purposes. The collision is assumed to have been detected by a passive safety system, e.g., airbag sensors. The control system is activated by the monitoring signal. After the collision has occurred the motion of the vehicle and the operation of the control system are illustrated through CarSim simulation examples. Two control solutions are analyzed: in the first case active steering is used while in the second case steering is combined with differential braking. With the knowledge of certain vehicle parameters and the impact force and direction, post impact vehicle states (yaw rate, velocities, roll rate) can be analyzed. A sensitivity analysis is carried out to determine the validity range of the vehicle model in the presence of uncertainties and different kinds of impact forces. Several software packages are used for the design and analysis of the controlled system. The control design is performed by using the Matlab/Simulink software and the verification of the designed controller is performed by using the CarSim software.

关键词： Automobile steering equipment

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Automatic simulation model generation supported by data stored in low level controllers

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IFAC Proceedings Volumes 2012年第6期45卷 242-247页

作者： G. Popovics Cs. Kardos A. Pfeiffer B. Kádár Z. Vén L. Monostori Fraunhofer Project Center on Production Management and Informatics Computer and Automation Research Institute Hungarian Academy of Sciences (Tel: +36 1 279 6115 Faculty of Mechanical Engineering Budapest University of Technology and Economics

One of the most widespread techniques to evaluate various aspects of a manufacturing system is discrete-event simulation (DES). However, building a simulation model of a manufacturing system is a difficult task and needs great resource expenditures. Automated data collection and model buildup can drastically reduce the time of the design phase as well as support model reusability. Since most of the manufacturing systems are controlled by low level controllers (e.g., PLCs, CNCs) they store structure and control logic of the system to be modeled by a DES system. The paper introduces an ongoing research of PLC program processing method for automatic simulation model generation of a conveyor system of a leading automotive factory. Results of the validation process and simulation experiments are also described through a case study.

关键词： Programmable logic controllers manufacturing computer simulation automatic recognition

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A lightweight cooperative detection framework of DDoS/DoS attacks based on counting bloom filter

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Journal of Theoretical and Applied Information Technology 2012年第1期45卷 160-167页

作者： Shuai, Chunyan Jiang, Jianhui Ouyang, Xin Department of Computer Science and Technology Tongji University Shanghai 201804 China Faculty of electric power engineering Kunming University of Science and Technology Kunming 650051 Yunnan China Faculty of information engineering and automation Kunming University of Science and Technology Kunming 650051 Yunnan China

Detection and traceback of distributed denial of service (DDoS/DoS) attacks have become a challenge for network security. In this paper, we propose a lightweight cooperative detection framework (CCBFF) based on counting bloom filter to detect and trace DDoS/DoS attack online. The CCBFF contains 2 counting bloom filters CBF1 and CBF2. The CBF1 distinguishes different network connection topology of a router by the "options" field of IP-V4, encodes the existing DDoS/DoS attacks and all connected device's addresses and stored them. By querying the CBF1, the CBF2 recognizes suspicious packets, accumulates them and sends out super alerts to the victim. According to super alerts, the CCBFF at the victim-end recognize DDoS/DoS attacks. The experiment results show that the CCBFF is effective in detection and traceback different DDoS attacks. © 2005 - 2012 JATIT & LLS. All rights reserved.

关键词： Denial-of-service attack

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Physiological signals to individual assessment for application in wireless health systems

Physiological signals to individual assessment for applicati...

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IEEE SSD International Multi-Conference on Systems, Signals and Devices

作者： Mohit Kumar Norbert Stoll Kerstin Thurow Regina Stoll Center for Life Science and Automation Rostock Germany Institute of Automation College of Computer Science and Electrical Engineering University of Rostock Rostock Germany Institute of Preventive Medicine Faculty of Medicine University of Rostock Rostock Germany

ISBN: (纸本)9781467315906

关键词： Physiology Stochastic processes Data models Vectors Feature extraction Bayesian methods Computational modeling

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Decentralized discrete-event modeling and control of task execution for robotic networks

Decentralized discrete-event modeling and control of task ex...

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IEEE Conference on Decision and Control

作者： Donato Di Paola Andrea Gasparri David Naso Frank L. Lewis Faculty of Engineering Computer Science and Automation Department University Roma Tre Rome Italy Department of Electrical and Electronic Engineering (DEE) Polytechnic of Bari Bari Italy Automation and Robotics Research Institute University of Texas Arlington Fort Worth TX USA

ISBN: (纸本)9781467320658

This paper describes a decentralized approach to control the execution of a set of tasks for a network of heterogeneous robotic agents, i.e., agents with different sets of sensors and actuators. The proposed approach is based on a discrete-event modeling and control framework. The novelty is the full decoupling between the tasks modeling and their deployment. This implies an higher robustness to faults in the network of agents and a more systematic way for the task modeling regardless of the actual capability of the agents. A consensus-based mechanism is exploited in the control system to achieve coherence among the agents state and synchronize the agents action.

关键词： Vectors Control systems Robot kinematics Robot sensing systems Synchronization Indexes

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FPGA based parallel connection system of separate voltage sources

FPGA based parallel connection system of separate voltage so...

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International Conference on Renewable Energy Research and Applications (ICRERA)

作者： Erdal Irmak İlhami çolak Halil İbrahim Bülbül Naki Güler Ayberk Calpbinici Electrical and Computer Engineering Department Faculty of Technology Gazi University Ankara Turkey Department of Computer Education Faculty of Industrial Arts Education Gazi University Ankara Turkey Electronics and Automation Department Gazi Vocational School Gazi University Ankara Turkey

In this study, parallel connection of separate voltage sources has been realized using cuk converters. For this aim, output voltages of converters are measured continuously and then fixed to a reference value. The PWM signals which are required to control the converters and to sense the current and voltage signals are generated by an FPGA. Since the FPGA has parallel processing feature, voltage and current data of the system are measured at the same time. Thus, the converters are connected in parallel punctually and load sharing between them are provided in order to eliminate some undesired cases like unbalanced loading. In the system realized, two identical cuk converters are used. As cuk converters can operate both in buck and boost modes, output voltages are fixed to the reference voltage successfully, even though input voltages are low or high. Experimental results show that the system achieved operates with a reasonable efficiency ranging from 81% to 88%.

关键词： Voltage measurement Field programmable gate arrays Educational institutions Voltage control Renewable energy resources Switches Solar energy

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